CN108023497A - Series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering - Google Patents
Series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering Download PDFInfo
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- CN108023497A CN108023497A CN201810020153.0A CN201810020153A CN108023497A CN 108023497 A CN108023497 A CN 108023497A CN 201810020153 A CN201810020153 A CN 201810020153A CN 108023497 A CN108023497 A CN 108023497A
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- 230000035939 shock Effects 0.000 title claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 230000009466 transformation Effects 0.000 claims abstract description 27
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 230000002457 bidirectional effect Effects 0.000 claims description 37
- 238000004146 energy storage Methods 0.000 claims description 14
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- 230000010363 phase shift Effects 0.000 description 11
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/538—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
- H02M7/53803—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current
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- H02J3/382—
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- H02J3/387—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to one kind series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering, its circuit structure is that the input filter on ground and a shared output high-frequency isolation transformation week wave conversion filter circuit connection are formed altogether by multiple not by a multiple input single output high-frequency inverter circuit with series connection simultaneous selection power switch, each input terminal of multiple input single output high-frequency inverter circuit is corresponded with the output terminal of each input filter to be coupled, the output terminal of multiple input single output high-frequency inverter circuit and the input terminal of output high-frequency isolation transformation week wave conversion filter circuit are connected；It has the characteristics that multiple input sources not altogether while or time sharing power supply, output and input high-frequency isolation, share output high frequency transformation week wave conversion filter circuit, simple circuit, single-stage power conversion, conversion efficiency is high, output voltage ripple is small, application prospect is extensive, to realize that the Small And Medium Capacity distributed power supply system of a variety of new energy joint power supplies has established key technology.
Description
Technical field
Series connection according to the present invention while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering, belong to
Technics of Power Electronic Conversion technology.
Background technology
Inverter is to be transformed into a kind of unstable, inferior direct current energy using power semiconductor stablize, is high-quality
AC energy static ac dc converter device, for AC load use or realize exchange it is grid-connected.Export AC load or AC network
The inverter for having low-frequency electric to isolate (including without electrical isolation) or high frequency electrical isolation between input DC power, is referred to as
Low frequency link, annulus inverter in high frequency.Electrical isolation element has primarily served following effect in inverter：(1) realize inverse
Become the electrical isolation between device output and input, improve the security reliability and Electro Magnetic Compatibility of invertor operation；(2) realize
Matching between inverter output voltage and input voltage, that is, realize inverter output voltage and be higher than, equal to or less than defeated
Enter the technique effect of voltage, its application range has obtained widening significantly；(3) when high frequency transformer or high frequency storage transformer
In more than 20kHz, its volume, weight greatly reduce working frequency, and audio noise also eliminates.Therefore, sent out with direct current
Motor, storage battery, photovoltaic cell and fuel cell etc. are the secondary transformation of electrical energy occasion of main dc power supply, and inverter has important
Application value.
The new energy such as solar energy, wind energy, tide energy and geothermal energy (also referred to as green energy resource), have cleanliness without any pollution, honest and clean
Valency, it is reliable, abundant the advantages that, thus be with a wide range of applications.Due to traditional fossil energies such as oil, coal and natural gases
(the non-renewable energy) growing tension, environmental pollution is serious, causes global warming and the production of nuclear energy to produce core again gives up
Reason, the development and utilization of new energy such as material and pollution environment are increasingly valued by people.Generation of electricity by new energy mainly has light
The types such as volt, wind-force, fuel cell, waterpower, underground heat, there are supply of electric power it is unstable, it is discontinuous, with weather conditions change etc.
Defect, it is therefore desirable to using the distributed power supply system of a variety of new energy joint power supply.
Traditional new energy distributed power supply system, as shown in Figure 1, 2.The system is typically to use multiple single input direct currents
Photovoltaic cell, fuel cell, wind-driven generator etc. are not required to the new energy equipment of energy stores respectively by one by converter
A Unidirectional direct-current converter carries out transformation of electrical energy and is connected to the direct current mother of public inverter afterwards in parallel or series in output terminal
On line, it is intended to ensure the power supply of various new energy joint and being capable of co-ordination.The distributed generation system realizes multiple defeated
Enter the preferential utilization that source powers to the load with the energy at the same time, improve stability and the flexibility of system, but there are two stage power
Conversion, the defects of power density is low, conversion efficiency is low, of high cost, the practicality, which receives, significantly to be limited.
In order to simplify circuit structure and reduce power conversion series, it is necessary to have the new of single stage circuit structure shown in Fig. 3
Type multi input inverter substitutes Fig. 1,2 shown traditional multi inputs with DC converter with inverter two-stage cascade circuit structure
Inverter forms new single-stage new energy distributed power supply system.Single-stage multi input inverter allows a variety of new energy to input,
Property, amplitude and the characteristic of input source can be identical, can also difference it is very big.New single-stage new energy distributed power supply system
With circuit structure is succinct, single-stage power conversion, multiple input source is at the same time in a HF switch cycle or timesharing is supplied to load
Electricity, the advantage such as cost is low.
Therefore, a kind of the single-stage multi input inverter for allowing a variety of new energy to combine power supply and its new energy point are actively sought
Cloth electric power system is extremely urgent, and stability and flexibility for improving system, realize that the preferential of new energy utilizes or fill
Divide to utilize and be of great significance tool.
The content of the invention
The invention aims to provide it is a kind of have the power supply of a variety of new energy joint, input DC power not altogether, it is how defeated
Enter list output high-frequency inverter circuit to set series connection simultaneous selection switch, export high-frequency isolation, multiple input power supply between input
At the same time or timesharing powers to the load, circuit topology is succinct, shares output high-frequency isolation transformation week wave conversion filter circuit, single-stage work(
Rate conversion, conversion efficiency is high, output voltage ripple is small, output Small And Medium Capacity, the series connection for the features such as application prospect is extensive supply at the same time
Electric normal shock cycle changing type single-stage multi input annulus inverter in high frequency.
Technical program of the present invention lies in：One kind series connection while normal shock cycle changing type single-stage multi input high frequency link of powering
Inverter, be by a multiple input single output high-frequency inverter circuit by it is multiple not altogether the input filter on ground and one it is shared defeated
Go out high-frequency isolation transformation week wave conversion filter circuit connection form, each input terminal of multiple input single output high-frequency inverter circuit with
The output terminal of each input filter corresponds connection, the output terminal of multiple input single output high-frequency inverter circuit and the output
High-frequency isolation transformation week, the high frequency transformer input terminal of wave conversion filter circuit was connected, and the multiple input single output high frequency is inverse
Power transformation route multiple series series simultaneous selection power switch circuit, the bidirectional power flow single-input single-output height that output terminal is forward connected
Frequency inverter circuit sequentially cascades composition, at any time equivalent to one bidirectional power flow single-input single-output high-frequency inversion electricity
Road, every simultaneous selection power switch circuit of connecting all the way is by a two quadrant power switch and a power diode structure
Into and the source electrodes of two quadrant power switch be connected with the cathode of power diode, the drain electrode of the two quadrants power switch and work(
The anode of rate diode be respectively the road series connection simultaneous selection power switch circuit positive and negative polarity input terminal, two quadrant
The source electrode of power switch and the anode of power diode are respectively the positive and negative polarity of road series connection simultaneous selection power switch circuit
Output terminal, the output high-frequency isolation transformation week wave conversion filter circuit are filtered by high frequency transformer, frequency converter, output
Device sequentially cascades composition, and the frequency converter is by multiple four-quadrants that can bear bi-directional voltage stress and bidirectional current stress
High frequency power switch is formed.
The present invention is to form the DC converter of a variety of new energy joint electric power systems of tradition with inverter two-stage cascade
Multi input inverter circuit structure, be configured to the single-stage multi input inverter circuit structure of new series connection simultaneous selection switch,
Propose series connection and meanwhile power normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit structure with topology race and its
Energy management control strategy, the i.e. circuit structure are by providing a kind of multi input list with series connection simultaneous selection power switch
High-frequency inverter circuit is exported by the multiple not input filter on ground and a shared output high-frequency isolation transformation week wave conversions altogether
Filter circuit connection forms.
The series connection of the present invention is powered normal shock cycle changing type single-stage multi input annulus inverter in high frequency at the same time, can will be multiple
Input direct voltage altogether, unstable, which is not reverse into needed for a load, stablizes good output alternating current, how defeated has
Enter DC power supply not to be not isolated from, export and input high-frequency isolation, multi input altogether, between multiple input single output high-frequency inverter circuit
Power supply is at the same time or timesharing powers to the load, circuit topology is succinct, shares output high-frequency isolation transformation week wave conversion filter circuit, list
Level power conversion, conversion efficiency is high, output voltage ripple is small, output Small And Medium Capacity, the features such as application prospect is extensive.Series connection is at the same time
Power normal shock cycle changing type single-stage multi input annulus inverter in high frequency comprehensive performance, by than traditional DC converter with it is inverse
It is superior to become the multi input inverter that device two-stage cascade forms.
Brief description of the drawings
Fig. 1, the two-stage type new energy distributed power supply system of traditional multiple Unidirectional direct-current converter output terminal parallel connections.
Fig. 2, the two-stage type new energy distributed power supply system of traditional multiple Unidirectional direct-current converter output terminals series connection.
Fig. 3, new single-stage multi input inverter principle block diagram.
Fig. 4, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency functional block diagram of powering.
Fig. 5, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit structure diagram of powering.
Fig. 6, bi-polarity phase-shifted control series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering
Steady principle oscillogram.
Fig. 7, uni-polarity phase-shifted control series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering
Steady principle oscillogram.
Fig. 8, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
One ----recommend full wave type circuit diagram.
Fig. 9, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Two ----push-pull bridge circuit diagram.
Figure 10, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Three ----push-pull ortho-exciting full wave type circuit diagram.
Figure 11, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Four ----push-pull ortho-exciting bridge circuit schematic diagram.
Figure 12, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Five ----half-bridge full wave type circuit diagram.
Figure 13, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Six ----half-bridge bridge circuit schematic diagram.
Figure 14, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Seven ----full-bridge full wave type circuit diagram.
Figure 15, series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology example of powering
Eight ----full-bridge bridge circuit schematic diagram.
Figure 16, series connection are powered the output voltage, defeated of normal shock cycle changing type single-stage multi input annulus inverter in high frequency at the same time
Enter instantaneous current feedback bipolarity phase shift principal and subordinate power distribution energy management control block diagram.
Figure 17, series connection are powered the output voltage, defeated of normal shock cycle changing type single-stage multi input annulus inverter in high frequency at the same time
Enter instantaneous current feedback bipolarity phase shift principal and subordinate power distribution energy management control principle oscillogram.
Figure 18, series connection are powered the output voltage, defeated of normal shock cycle changing type single-stage multi input annulus inverter in high frequency at the same time
Enter instantaneous current feedback unipolarity phase shift principal and subordinate power distribution energy management control block diagram.
Figure 19, series connection are powered the output voltage, defeated of normal shock cycle changing type single-stage multi input annulus inverter in high frequency at the same time
Enter instantaneous current feedback unipolarity phase shift principal and subordinate power distribution energy management control principle oscillogram.
Figure 20, has output terminal and connects the series connection of single-stage isolated Bidirectional charging-discharging converter and power at the same time normal shock week wave conversion
Type single-stage multi input high frequency link autonomous power supply system.
Figure 21, has the maximum power output energy of single-stage isolated Bidirectional charging-discharging converter output voltage separate control loop
Measure management and controlling tactics.
Figure 22, the output voltage u of autonomous power supply systemoWith output inductor electric current iLf、iLf' waveform.
Embodiment
Technical scheme is described further with reference to Figure of description and embodiment.
Series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering, are defeated by a multi input list
Go out high-frequency inverter circuit by the multiple not input filter on ground and shared output high-frequency isolation transformation week wave conversion filters altogether
Wave circuit connection is formed, each input terminal of multiple input single output high-frequency inverter circuit and the output terminal one of each input filter
One corresponds to connection, and the output terminal of multiple input single output high-frequency inverter circuit is filtered with the output high-frequency isolation transformation week wave conversion
The high frequency transformer input terminal of circuit is connected, what the multiple input single output high-frequency inverter circuit was forward connected by output terminal
Multiple series series simultaneous selection power switch circuit, bidirectional power flow single-input single-output high-frequency inverter circuit sequentially cascade composition,
Equivalent to one bidirectional power flow single-input single-output high-frequency inverter circuit at any time, it is described per simultaneous selection of connecting all the way
Power switch circuit is by a two quadrant power switch and a power diode forms and the source electrode of two quadrant power switch
It is connected with the cathode of power diode, the drain electrode of the two quadrants power switch and the anode of power diode are respectively the road
The positive and negative polarity input terminal of series connection simultaneous selection power switch circuit, two pole of source electrode and power of the two quadrants power switch
The anode of pipe be respectively the road series connection simultaneous selection power switch circuit positive and negative polarity output terminal, the output high frequency every
Sequentially cascaded and formed by high frequency transformer, frequency converter, output filter from transformation week wave conversion filter circuit, the week
Wave converter is made of multiple four-quadrant high frequency power switches that can bear bi-directional voltage stress and bidirectional current stress.
Series connection while functional block diagram, the circuit knot of normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering
The steady principle waveform of structure, bi-polarity phase-shifted control and uni-polarity phase-shifted control inverter, respectively as shown in FIG. 4,5,6, 7.Figure
4th, in 5,6,7, Ui1、Ui2、…、UinFor n roads input dc power potential source (n is the natural number more than 1), ZLExchanged for single-phase output
Load (including single phase ac passive load and the load of single phase ac power grid), uo、ioRespectively single-phase output alternating voltage with exchange
Electric current.The single output high-frequency inverter circuit of n inputs be forward connected by output terminal multiple series series simultaneous selection power switch circuit,
Bidirectional power flow single-input single-output high-frequency inverter circuit sequentially cascades composition, and the multiple series series that wherein output terminal is forward connected is same
When selection power switch circuit be that the two quadrant high frequency powers that unidirectional voltage stress and bidirectional current stress can be born by n select
Switch Ss1、Ss2、…、SsnAnd n selection diode Ds1、Ds2、…、DsnForm (power selector switch Ss1、Ss2、…、SsnAt the same time
Open or have phase difference open-minded, switching frequency is identical or different, only analyzes S heres1、Ss2、…、SsnUsing same switch frequency
And the control mode opened at the same time), bidirectional power flow single-input single-output high-frequency inverter circuit is to bear unidirectional electricity by multiple
Compression, two quadrant high frequency powers of bidirectional current stress switch are formed, and MOSFET, IGBT, GTR constant power device can be selected；
Output high-frequency isolation transformation week wave conversion filter circuit sequentially cascades structure by high frequency transformer, frequency converter, output filter
Into wherein frequency converter is by multiple four-quadrant high frequency power switches that can bear bi-directional voltage stress, bidirectional current stress
Realize, only depict the circuit diagram of the LC output filters suitable for passive AC load in figure as space is limited, and be not drawn into fitting
Circuit diagram for L the or LCL output filters of AC network load；N roads input filter is the LC wave filters (dashed box containing addition
Filter inductance Li1、Li2、…、Lin) or capacitive filter (the filter inductance L without addition dashed boxi1、Li2、…、Lin), use
N roads input direct-current electric current can be smoother during LC wave filters.
The single high-frequency inverter circuit that exports of n inputs is by n roads input dc power potential source Ui1、Ui2、…、UinAmplitude is modulated into defeated
Enter the bipolarity binary states of power supply number change or the multilevel SPWM voltage wave u of unipolarity tri-stateABOr uA′B′, through high frequency transformation
Device T isolates transformation and frequency converter is demodulated to bipolarity binary states or unipolarity tri-state multilevel SPWM voltage wave uCD, through output
Wave filter Lf-CfObtain the sinusoidal voltage u of high quality on the net in single phase ac passive load or single-phase alternating current afterwardsoOr just
String alternating current io, n input pulse electric current of the single output high-frequency inverter circuit of n inputs is through input filter Li1-Ci1、Li2-
Ci2、…、Lin-CinOr Ci1、Ci2、…、CinAfterwards in n roads input DC power Ui1、Ui2、…、UinIt is middle to obtain smooth input direct-current
Electric current Ii1、Ii2、…、Iin.It should be added that the more level high-frequency voltage square waves of bipolarity binary states and bipolarity tri-state are more
Level SPWM voltage wave uABOr uA′B′Amplitude be ± 2 (Ui1+Ui2+…+Uin) (push-pull circuit), ± (Ui1+Ui2+…+Uin)
(push-pull ortho-exciting formula, full bridge circuit), ± 1/2 (Ui1+Ui2+…+Uin) (half bridge circuit), uCDAmplitude be ± (Ui1N2/N1+
Ui2N2/N1+…+UinN2/N1) (push-pull type, push-pull ortho-exciting formula, full bridge circuit), ± 1/2 (Ui1N2/N1+Ui2N2/N1+…+
UinN2/N1) (half bridge circuit).
Connect while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering belongs to voltage-dropping type inverter, n
A input source can also both be powered to the load at the same time with timesharing.The principle of this inverter is equivalent to multiple normal shock week wave conversions
Type (voltage-type) single input inverter is in the superposition of output end voltage, i.e. output voltage uoWith input direct voltage (Ui1、Ui2、…、
Uin), high frequency transformer turn ratio N2/N1, duty cycle (d1、d2、…、dj、…、dn) between relation be uo=[ui1(d1+dk-dj+1)
+ui2(d2+dk-dj+1)+…+uij(dj+dk-dj+1)+uij+1dk+…+uikdk+uik+1dk+1+…uindn]N2/N1(unipolarity phase shift
Control) or uo=[ui1(dj+1-dk+1)+ui2(dj+1-dk+1)+…+uij+1(dj+1-dk+1)+uij+2(dj+1+dj+2-2dk+1)/2+uij+3
(dj+1+dj+3-2dk+1)/2+…+uik(dj+1+dk-2dk+1)/2+uik+1(dj+1-dk+1)/2+…+uin(dj+1-dk+1)/2]N2/N1
(bi-polarity phase-shifted control), wherein 1≤j, k≤n.For appropriate phase shifting angle θ and high frequency transformer turn ratio N2/N1, uoCan be big
In, equal to or less than the sum of input direct voltage Ui1+Ui2+…+Uin, the high frequency transformer in the inverter, which not only plays, to be carried
The security reliability and Electro Magnetic Compatibility of high invertor operation, it is often more important that play matched output voltage and input voltage
Effect, that is, the output voltage for realizing inverter are higher than, equal to or less than the sum of input direct voltage Ui1+Ui2+…+UinSkill
Art effect, its application range have obtained widening significantly.Since there are 0≤θ≤180o, u can be releasedo＜ (Ui1+Ui2+…+Uin)
N2/N1, i.e. output voltage uoAlways it is less than input direct voltage (Ui1、Ui2、…、Uin) and high frequency transformer turn ratio N2/N1Product it
(Ui1+Ui2+…+Uin)N2/N1；Since the inverter belongs to single stage circuit structure, its transformer working frequency is high frequency, n
The single output high-frequency inverter circuit of input is provided with the multiple series series simultaneous selection power switch circuit that output terminal is forward connected, therefore will
This kind of inverter is known as normal shock cycle changing type (voltage-dropping type) single-stage multi input annulus inverter in high frequency of powering at the same time of connecting.This is inverse
Become device n input source within a HF switch cycle at the same time or timesharing to output AC load power, duty cycle can phase
With (d1=d2=...=dn), can not also be with (d1≠d2≠…≠dn)。
Series connection of the present invention while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering, due to altogether
With a multiple input single output high-frequency inverter circuit and an output high-frequency isolation transformation week wave conversion filter circuit, become with direct current
There is difference substantially for the circuit structure for traditional multi input inverter that parallel operation and inverter two-stage cascade are formed.Therefore,
Inverter of the present invention has novelty and creativeness, and with output with inputting high-frequency isolation, multi input power supply at the same time
Or time sharing power supply, circuit topology are succinct, single-stage power conversion, step-up ratio are big, input voltage prepares the flexible, high (meaning of conversion efficiency
It is small that taste energy loss), output voltage ripple is small, output Small And Medium Capacity, the advantages that cost is low, application prospect is extensive, be a kind of
Preferable energy-saving type single-stage multi input inverter, builds energy-saving, conservation-minded society today vigorously advocating, has more
Important value.
Series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency circuit topology race embodiment of powering, such as
Shown in Fig. 8,9,10,11,12,13,14,15.In circuit shown in Fig. 8-15, multiple series series simultaneous selection that output terminal is forward connected
Power switch circuit is by the n two quadrant high frequency powers switches and n a two that can bear unidirectional voltage stress, bidirectional current stress
Pole pipe is formed, and bidirectional power flow single-input single-output high-frequency inverter circuit is then by multiple unidirectional voltage stress, two-way of bearing
The two quadrant high frequency powers switch of current stress forms (push-pull type shown in Fig. 8,9,10,11,12,13, push-pull ortho-exciting formula and half-bridge
Formula circuit is made of 2 two quadrant high frequency powers switch, and Figure 14, full bridge circuit is opened by 4 two quadrant high frequency powers shown in 15
Close and form), output cycle translation circuit is then switched by multiple four-quadrant high frequency powers to be realized.Precisely, shown in Fig. 8,10,12
It is that can bear unidirectional voltage stress, bidirectional current by n+2 to recommend full wave type, push-pull ortho-exciting full wave type, half-bridge full wave type circuit
The two quadrant high frequency powers switch of stress, n diode and 2 can bear bi-directional voltage stress, the four-quadrant of bidirectional current stress
Limit for height frequency power switch realizes that push-pull bridge shown in Fig. 9,11,13, push-pull ortho-exciting bridge-type, half-bridge bridge circuit are by n+2
Can bear unidirectional voltage stress, the two quadrant high frequency powers switch of bidirectional current stress, n diode and 4 can bear it is two-way
Voltage stress, the four-quadrant high frequency power of bidirectional current stress are switched and realized, Figure 14, full-bridge full wave type, full-bridge bridge shown in 15
Formula circuit is by 2, the 4 four-quadrant high frequency power switches and n+4 that can bear bi-directional voltage stress, bidirectional current stress respectively
It is a to bear unidirectional voltage stress, the two quadrant high frequency powers switch of bidirectional current stress and n diode to realize.Need to mend
Explanation is filled, it is LC wave filter situations that circuit shown in Fig. 8,9,10,11,12,13,14,15, which gives input filter, is limited to
Length does not provide circuit when input filter is capacitive filter situation；Figure 10, push-pull ortho-exciting formula circuit shown in 11 and Figure 12,
Half bridge circuit shown in 13 is only applicable to the n of substantially equal situation of input power duty cycle；Circuit is only drawn shown in Fig. 8-15
It is suitable for the circuit diagram of the LC output filters of passive AC load, and is not drawn into being suitable for the L or LCL of AC network load
The circuit diagram of output filter.Series connection while normal shock cycle changing type single-stage multi input eight kinds of topologys of annulus inverter in high frequency of powering
The power switching voltage stress of embodiment, as shown in table 1.Push-pull type, push-pull ortho-exciting formula circuit are inputted suitable for middle power low voltage
Inversion occasion, half bridge circuit are suitable for low-power high-voltage input inversion occasion, and it is defeated that full bridge circuit is suitable for middle power high pressure
Enter inversion occasion.The circuit topology race is suitable for multiple input direct voltages altogether, unstable being transformed into electric needed for one
Pressure size, stablize good output alternating current, can be used to realize that the sigle-stage AC with excellent performance and wide application prospect is more
Kind new energy distributed power supply system, such as photovoltaic cell 40-60VDC/220V50HzAC or 115V400HzAC, 10kw protons
Exchange film fuel battery 85-120V/220V50HzAC or 115V400HzAC, middle-size and small-size family wind-power electricity generation 24-36-
48VDC/220V50HzAC or 115V400HzAC, large-scale wind generating 510VDC/220V50HzAC or 115V400HzAC
Power Deng multiple input sources to AC load or AC network.
The series connection of table 1 while the topological embodiments of eight kinds of normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering
Power switching voltage stress
Energy management control strategy is vital for a variety of new energy joint electric power system.It is more due to existing
A input source and corresponding power switch unit, it is therefore desirable to multiple duty cycles are controlled, that is, there are multiple controls
The free degree, this energy management just for a variety of new energy provide possibility.Series connection while normal shock cycle changing type single-stage of powering
The energy management control strategy of multi input annulus inverter in high frequency, need to be provided simultaneously with the energy management of input source, photovoltaic cell and
MPPT, output voltage (electric current) the control three zones of the new energy equipments such as wind-driven generator, also need to consider electric power storage sometimes
Smooth and seamless switching of the charge and discharge control and system in pond under different powering modes.Series connection while normal shock cycle changing type of powering
Single-stage multi input annulus inverter in high frequency uses two kinds of different energy management modes：(1) energy management modes I-- principals and subordinates power
The method of salary distribution, it is known that power needed for load as far as possible by main power supply unit the 1st, 2 ..., n-1 roads input source provide, give the 1st,
2nd ..., the input current of n-1 roads input source, equivalent to the given 1st, 2 ..., the input power of n-1 roads input source, needed for load
Deficit power by from the n-th road of power supply unit input source provide, can be not required to addition batteries to store energy equipment；(2) energy management
Mode II-maximum power output mode, the 1st, 2 ..., n roads input source with maximum power output to load, eliminate electric power storage
Pond energy storage device, realizes the requirement that grid-connected system makes full use of the energy, if in output terminal and connecing a storage battery and filling
Discharger can also realize the stabilization of autonomous power supply system output voltage (electric current).When n roads new energy input voltage to timing,
By control the 1st, 2 ..., the input current of n roads input source, be equivalent to control the 1st, 2 ..., the input work of n roads input source
Rate.
Series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering, using output voltage, input
The phase shift of instantaneous current feedback bipolarity, unipolarity phase shift principal and subordinate power distribution energy management control strategy, to form independent supply
Electric system；Or using the phase shift of input current instantaneous values feedback bipolarity, unipolarity phase shift maximum power output energy management control
Strategy, to form grid-connected system.1st, 2 ..., n-1 roads input source output power is fixed and the supplement load of the n-th road input source
The output voltage of required deficit power, input current instantaneous values feedback bipolar SPWM, the distribution of Unipolar SPWM principal and subordinate power
Energy management control block diagram and control principle waveform, respectively as shown in Figure 16,17,18,19.Figure 16, the bipolarity shown in 17 are moved
The basic thought of phase control scheme is that the single output high-frequency inverter circuit of n inputs produces the more level high-frequency square waves of bipolarity binary states, the
1st, 2 ..., the ON time of n-1 roads selection power switch be allocated according to error current size (realize the 1st,
2nd ..., the maximum power output of n-1 roads input source), the ON time of the n-th road power switch is that basis is less than the (n-1)th tunnel error
The signal and T of current signalsThe difference of/2 and the 1st tunnel selection power switch ON time obtains (realizing the n-th road input source work(
Rate is supplied), any moment always has multichannel or input source accesses all the way, it is ensured that the positive transmission of multichannel input source energy, and
The viae naturales of energy feedback is that n input is source-series, by between frequency converter and the single output high-frequency inverter circuit of n inputs
Phase shift realize the stabilization of inverter output voltage, by the commutation overlap of frequency converter realize high frequency transformer leakage inductance energy
The nature commutation and frequency converter Zero Current Switch of amount, the control strategy are suitable for circuit shown in Fig. 8-15.1st, 2 ..., n-
1 road input source obtains reference current signal I after maximum power point calculates* i1r、I* i2r、…、I* i(n-1)r, inverter the 1st,
2nd ..., the input current feedback signal I on n-1 roadsi1f、Ii2f、…、Ii(n-1)fRespectively with the 1st, 2 ..., n-1 roads reference current signal
Ii1r、Ii2r、…、Ii(n-1)rCompare amplification, current error amplified signal I through proportional and integral controller1e、I2e、…、I(n-1)e、
kI(n-1)e(0 ＜ k ＜ 1) and the unipolarity saw-toothed carrier-u after displacementc+Ucm/ 2 compare, and through appropriate combinational logic circuit
The control signal u of the series connection simultaneous selection power switch of the single output high-frequency inverter circuit of n inputs is obtained afterwardsgss1、ugss2、…、
ugssn；Bipolarity saw-toothed carrier ucThe control of the single output high-frequency inverter circuit power switch of n inputs is obtained after rising edge two divided-frequency
Signal u processedgs1(ugs4) and its inversion signal ugs2(ugs3)；The output voltage feedback signal u of inverterofWith reference sinusoidal voltage ur
Compare amplification, voltage error amplified signal u through proportional and integral controllereRespectively with bipolarity saw-toothed carrier ucWith-ucCompare,
Consider outputting inductance electric current iLfPolarity selection signal and frequency converter power obtained after appropriate combinational logic circuit open
The control signal u of passgs5(ugs′5)、ugs6(ugs′6)、ugs7(ugs′7)、ugs8(ugs′8).As bearing power PoMore than the 1st, 2 ..., n-
During the sum of maximum power of 1 road input source, output voltage uoReduce, regulated output voltage ueVirtual value be more than threshold
Comparative level UtAnd I1e、I2e、…、I(n-1)eZero is all higher than, diode D1、D2、…、Dn-1Block, the 1st, 2 ..., n-1 roads electricity
Throttle regulator independently works with the n-th road voltage regulator, i.e. Ii1r=I* i1r、Ii2r=I* i2r、…、Ii(n-1)r=I* i(n-1)r, the 1st, 2 ..., n-1 roads current regulator be used for realization the 1st, 2 ..., the maximum power output of n-1 roads input source, n-th
Road voltage regulator is used for realization the stabilization of inverter output voltage, and n roads input source is at the same time or timesharing powers to the load；Work as load
Power PoLess than the 1st, 2 ..., the sum of the maximum power of n-1 roads input source when, output voltage uoIncrease, when voltage regulator exports
Voltage ueVirtual value be reduced to threshold comparative level UtWhen following, diode Dn-1Conducting, D1、D2、…、Dn-2Still block, stagnant ring
Comparison circuit n+1 exports low level, and the n-th road input source stops power supply, and voltage regulator forms two close cycles control with current regulator
System processed, the 1st, 2 ..., n-1 roads input source in a switch periods at the same time or timesharing power to the load, current regulator
Reference current Ii(n-1)rReduce, i.e. Ii(n-1)r＜ I* i(n-1)r, the (n-1)th road input source output power, which reduces, (is operated in non-maximum work
Make a little), the n-th road input source output power is reduced to zero, the output voltage u of inverteroTend towards stability.When input voltage or load become
During change, by adjusting reference voltage urOr feedback voltage uofTo change error voltage signal ueWith error current signal I1e、
I2e、…、I(n-1)e、kI(n-1)e, so as to change duty cycle d1、d2、…、dnWith phase shifting angle θ, therefore inverter output electricity can be realized
Pressure, the adjusting of input current (output power) and stabilization.
Figure 18, the basic thought of uni-polarity phase-shifted control scheme shown in 19 are to pass through the single output high-frequency inversion electricity of n inputs
Phase shift generation bipolarity tri-state multilevel SPWM ripple between the right bridge arm in road and left bridge arm, frequency converter are more by bipolarity tri-state
Level SPWM ripple is demodulated to unipolarity tri-state multilevel SPWM ripple, the bipolarity three that frequency converter is exported in high-frequency inverter circuit
State multilevel SPWM ripple is that switch conversion is carried out during zero so as to fulfill zero voltage switch, and any moment is always there are multichannel or all the way
Input source access (one state or " -1 " state, ensure that energy it is positive transmit or reverse feedback) or 0 state (afterflow state), and energy
The viae naturales for measuring feedback is that n input is source-series, which is only applicable to Figure 14, circuit shown in 15.1st, 2 ..., n-
The ON time of 1 tunnel selection power switch is to the left bridge arm being distributed by SPWM and right bridge arm conducting letter according to error current size
Number or signal usumBe allocated (realize the 1st, 2 ..., the maximum power output of n-1 roads input source), and the n-th road power switch
ON time be to distribute to obtain according to the signal for being less than the (n-1)th road error current signal (to realize the benefit of the n-th tunnel input source power
Foot).1st, 2 ..., n-1 roads input source reference current signal I is obtained after maximum power point calculates* i1r、I* i2r、…、
I* i(n-1)r, inverter the 1st, 2 ..., the input current feedback signal I on n-1 roadsi1f、Ii2f、…、Ii(n-1)fRespectively with the 1st, 2 ...,
N-1 roads reference current signal Ii1r、Ii2r、…、Ii(n-1)rCompare amplification, current error amplified signal through proportional and integral controller
I1e、I2e、…、I(n-1)e、kI(n-1)e(0 ＜ k ＜ 1) passes through divider, multiplier, comparator and appropriate logic circuit respectively
The control signal u of the series connection simultaneous selection power switch of the single output high-frequency inverter circuit of n inputs is obtained afterwardsgss1、ugss2、…、
ugssn；The output voltage feedback signal u of inverterofWith reference sinusoidal voltage urIt is compared and enlarged through proportional and integral controller,
Voltage error amplified signal ueAnd its inversion signal-ueRespectively with bipolarity saw-toothed carrier ucCompare, through trailing edge two divided-frequency and
The power switch control signal u of the single output high-frequency inverter circuit of n inputs is obtained after not circuitgs1、ugs2、ugs3、ugs4；In figure
usumRepresent the single output left bridge arm of high-frequency inverter circuit of n inputs and right bridge arm Continuity signal or signal, UsummFor usumLevel
Amplitude, I1emFor current error amplified signal I1eMaximum；Bipolarity saw-toothed carrier ucThrough lower liter week is obtained along after two divided-frequency
The control signal u of wave converter power switchgs5(ugs′5)、ugs6(ugs′6)、ugs7(ugs′7)、ugs8(ugs′8)。
1st, 2 ..., n-1 roads current regulator independently work with the n-th road voltage regulator, the 1st, 2 ..., n-1 roads
Current regulator is used for realization the 1st, 2 ..., the maximum power output of n-1 roads input source, the n-th road voltage regulator is used for realization
The stabilization of inverter output voltage, n roads input source is at the same time or timesharing powers to the load.When input voltage or load change, lead to
Overregulate reference voltage urWith reference current Ii1r、Ii2r、…、Ii(n-1)r, or adjust feedback voltage uofWith feedback current Ii1f、
Ii2f、…、Ii(n-1)fTo change error voltage signal ueWith error current signal I1e、I2e、…、I(n-1)e、kI(n-1)e, so as to change
Duty cycle d1、d2、…、dnWith phase shifting angle θ, therefore the adjusting of the inverter output voltage, input current (output power) can be realized
With stabilization.
The waveform of bi-polarity phase-shifted control principle shown in Figure 17 has marked HF switch cycle TSWith a certain HF switch cycle TS
Interior 1st, 2 ..., the ON time T of n roads input sourceon1、Ton2、…、Tonn(Ton1＞ Ton2＞ ... ＞ Tonn) and during total conducting
Between Ton=TS/ 2, Figure 17, the common ON time T of bipolarity and uni-polarity phase-shifted control shown in 19comWith phase shifting angle θ at one
In the output voltage cycle changed by sinusoidal rule.In addition, for half bridge circuit shown in Figure 12,13, should be by half of input
DC voltage value (Ui1/2、Ui2/2、…、Uin/ 2) it is updated in voltage transfer ratio formula and is calculated.
In order to form the autonomous power supply system that can make full use of multiple input sources energy, multiple input source should be operated in maximum work
The rate way of output and need to configure energy storage device, to realize the stabilization of output voltage, i.e., inverter output terminal and connect one
Single-stage isolated Bidirectional charging-discharging converter, as shown in figure 20.The single-stage isolated Bidirectional charging-discharging converter is by input filter
(Li、CiOr Ci), high-frequency inverter, high frequency transformer, frequency converter, output filter (Lf′、Cf') sequentially cascade composition, institute
The frequency converter stated is switched by the four-quadrant high frequency power that can bear bi-directional voltage stress and bidirectional current stress and formed.It is described
Single-stage isolated Bidirectional charging-discharging converter transmit (energy storage device electric discharge), back transfer (energy storage device charging) energy is positive
When, a single-stage high frequency link DC-AC converter and a single-stage high frequency link AC-DC converter are equivalent to respectively.
The autonomous power supply system is used with single-stage isolated Bidirectional charging-discharging converter output voltage separate control loop
Maximum power output energy management control strategy, as shown in figure 21.As bearing power Po=UoIoMore than the maximum in multiple input source
The sum of power P1max+P2max+…+PnmaxWhen, the energy storage device such as storage battery, super capacitor is become by single-stage isolated Bidirectional charging-discharging
Parallel operation provides required deficit power-powering mode II to load, and energy storage device individually powers to the load -- powering mode III,
Belong to the egregious cases of powering mode II；As bearing power Po=UoIoThe sum of maximum power less than multiple input source P1max+
P2max+…+PnmaxWhen, the dump energy that multiple input source exports is by single-stage isolated Bidirectional charging-discharging converter to energy storage device
Charging -- powering mode I.By taking band resistive load as an example, the power flow direction control of single-stage isolated Bidirectional charging-discharging converter is discussed,
As shown in figure 22.For output filter capacitor Cf、Cf' and load ZLFor, connect while normal shock cycle changing type single-stage of powering is more
The output terminal of input annulus inverter in high frequency and single-stage isolated Bidirectional charging-discharging converter and connect it is equivalent to two current sources and
Connection superposition.The energy management control strategy shown in Figure 21, series connection while normal shock cycle changing type single-stage multi input height of powering
The output inductor electric current i of frequency annulus inverterLfWith output voltage uoWith the same phase of frequency, active power of output；Charge/discharge transformation
Device is by output voltage uoWith reference voltage uorefError amplification signal uoeWith high frequency carrier hand over cut generation SPWM signals into
Row control, its output inductor electric current iLf' and uoBetween there are phase difference θ, different phase difference θs means that output is different big
The small and active power in direction.Work as Po=P1max+P2max+…+PnmaxWhen, θ=90 °, the active power of charge/discharge transformation device output
It is zero, in light condition；Work as Po>P1max+P2max+…+PnmaxWhen, uoReduce, 90 ° of θ ＜, charge/discharge transformation device output wattful power
Rate, energy storage device provide the deficit power needed for load to load discharge, i.e. energy storage device；Work as Po＜ P1max+P2max+…+Pnmax
When, uoIncrease, 90 ° of θ ＞, the negative active power of charge/discharge transformation device output, loads to energy storage device feedback energy, i.e. multiple input
The dump power of source output charges energy storage device, is loaded when θ=180 ° maximum to the energy of energy storage device feedback.Therefore,
The energy management control strategy can be according to PoWith P1max+P2max+…+PnmaxRelative size control single-stage isolated is two-way to fill in real time
The power flow size and Orientation of electric discharge converter, realizes smooth and seamless switching of the system under three kinds of different powering modes.
Claims (3)
- The normal shock cycle changing type single-stage multi input annulus inverter in high frequency 1. one kind series connection is powered at the same time, it is characterised in that：It is this Inverter be by a multiple input single output high-frequency inverter circuit by it is multiple not altogether the input filter on ground and one it is shared defeated Go out high-frequency isolation transformation week wave conversion filter circuit connection form, each input terminal of multiple input single output high-frequency inverter circuit with The output terminal of each input filter corresponds connection, the output terminal of multiple input single output high-frequency inverter circuit and the output High-frequency isolation transformation week, the high frequency transformer input terminal of wave conversion filter circuit was connected, and the multiple input single output high frequency is inverse Power transformation route multiple series series simultaneous selection power switch circuit, the bidirectional power flow single-input single-output height that output terminal is forward connected Frequency inverter circuit sequentially cascades composition, at any time equivalent to one bidirectional power flow single-input single-output high-frequency inversion electricity Road, every simultaneous selection power switch circuit of connecting all the way is by a two quadrant power switch and a power diode structure Into and the source electrodes of two quadrant power switch be connected with the cathode of power diode, the drain electrode of the two quadrants power switch and work( The anode of rate diode be respectively the road series connection simultaneous selection power switch circuit positive and negative polarity input terminal, two quadrant The source electrode of power switch and the anode of power diode are respectively the positive and negative polarity of road series connection simultaneous selection power switch circuit Output terminal, the output high-frequency isolation transformation week wave conversion filter circuit are filtered by high frequency transformer, frequency converter, output Device sequentially cascades composition, and the frequency converter is by multiple four-quadrants that can bear bi-directional voltage stress and bidirectional current stress High frequency power switch is formed.
- The normal shock cycle changing type single-stage multi input annulus inverter in high frequency 2. series connection according to claim 1 is powered at the same time, It is characterized in that：The power at the same time circuit topology of normal shock cycle changing type single-stage multi input annulus inverter in high frequency of the series connection is Recommend full wave type, push-pull bridge, push-pull ortho-exciting full wave type, push-pull ortho-exciting bridge-type, half-bridge full wave type, half-bridge bridge-type, full-bridge all-wave Formula, full-bridge bridge circuit.
- The normal shock cycle changing type single-stage multi input annulus inverter in high frequency 3. series connection according to claim 1 is powered at the same time, It is characterized in that：The series connection while the output terminal for normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering simultaneously connect The single-stage isolated Bidirectional charging-discharging converter of one energy storage device, to form the autonomous power supply system of an output voltage stabilization； The single-stage isolated Bidirectional charging-discharging converter by input filter, high-frequency inverter, high frequency transformer, frequency converter, Output filter sequentially cascades composition, and the frequency converter is by that can bear the four of bi-directional voltage stress and bidirectional current stress Quadrant high frequency power switch is formed；Multiple input source is operated in maximum power output mode, according to bearing power with it is multiple defeated The relative size for entering the sum of source maximum power controls the power flow size and Orientation of single-stage isolated Bidirectional charging-discharging converter in real time, Realize that system output voltage is stablized and the smooth and seamless of energy storage device discharge and recharge switches.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258815A (en) * | 2021-05-28 | 2021-08-13 | 青岛大学 | Single-stage bidirectional AC/DC converter with variable structure and wide output range |
| TWI829070B (en) * | 2021-01-18 | 2024-01-11 | 大陸商台達電子企業管理（上海）有限公司 | Power convert system and the control method thereof |
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| CN1348248A (en) * | 2001-09-10 | 2002-05-08 | 南京航空航天大学 | High-frequency AC/AC converter with AC link |
| CN101267167A (en) * | 2008-01-09 | 2008-09-17 | 福州大学 | Voltage increase high-frequency link reverser |
| CN101534059A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation pressure increase and reduction type multi-input direct current converter |
| CN101588129A (en) * | 2009-06-30 | 2009-11-25 | 南京航空航天大学 | A kind of multiple input flyback converter |
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| CN1348248A (en) * | 2001-09-10 | 2002-05-08 | 南京航空航天大学 | High-frequency AC/AC converter with AC link |
| CN101267167A (en) * | 2008-01-09 | 2008-09-17 | 福州大学 | Voltage increase high-frequency link reverser |
| CN101534059A (en) * | 2009-04-14 | 2009-09-16 | 福州大学 | Single-isolation pressure increase and reduction type multi-input direct current converter |
| CN101588129A (en) * | 2009-06-30 | 2009-11-25 | 南京航空航天大学 | A kind of multiple input flyback converter |
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| CN113258815A (en) * | 2021-05-28 | 2021-08-13 | 青岛大学 | Single-stage bidirectional AC/DC converter with variable structure and wide output range |
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