CN108206645A - Band energy storage device is powered flyback DC converting type quasi-single-stage multi input inverter simultaneously - Google Patents
Band energy storage device is powered flyback DC converting type quasi-single-stage multi input inverter simultaneously Download PDFInfo
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- CN108206645A CN108206645A CN201810019755.4A CN201810019755A CN108206645A CN 108206645 A CN108206645 A CN 108206645A CN 201810019755 A CN201810019755 A CN 201810019755A CN 108206645 A CN108206645 A CN 108206645A
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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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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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Abstract
It powers simultaneously flyback DC converting type quasi-single-stage multi input inverter the present invention relates to a kind of band energy storage device,Its circuit structure is the multiple input single output high-frequency inverter circuit that has series connection simultaneous selection switch by one, and the input filter on ground and a shared output isolation energy storage Transformer Rectifier inversion filter circuit connection are formed altogether by multiple not,And a circuit with energy storage device charging and power switching voltage peak restrained is connected between the input filter output terminal of the power switch both ends of bidirectional power flow single-input single-output high-frequency inverter circuit and the n-th road energy storage device,N is the natural number more than 1,Each input terminal of multiple input single output high-frequency inverter circuit couples with the output terminal of each input filter one-to-one correspondence,The output terminal of multiple input single output high-frequency inverter circuit is connected with the storage transformer input terminal that energy storage Transformer Rectifier inversion filter circuit is isolated in the output,To realize that band energy storage device low capacity distributed power supply system establishes key technology.
Description
Technical field
Band energy storage device according to the present invention is powered flyback DC converting type quasi-single-stage multi input inverter simultaneously, is belonged 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
There is low-frequency electric to be isolated or the inverter of high frequency electrical isolation between input DC power, be referred to as low frequency link, high frequency ring
Save inverter.Electrical isolation element has primarily served following effect in inverter：(1) inverter output and input are realized
Between electrical isolation, improve the security reliability and Electro Magnetic Compatibility of invertor operation；(2) inverter output voltage is realized
Matching between input voltage, that is, realize inverter output voltage be higher than, the technique effect equal to or less than input voltage,
Its application range has obtained widening significantly；(3) when the working frequency of transformer or storage transformer is in more than 20kHz,
Volume, weight greatly reduce, and audio noise also eliminates.Therefore, with dc generator, accumulator, photovoltaic cell and combustion
Expect the secondary transformation of electrical energy occasion that battery etc. is main dc power supply, 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 that can generate core again gives up
Reasons, 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 variation 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 is powered to the load simultaneously with the energy, improve stability and the flexibility of system, but there are two stage powers
Transformation, 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, need that there is quasi-single-stage circuit structure shown in Fig. 3
Novel multi input inverter replaces Fig. 1, the 2 shown tradition with DC converter and inverter two-stage cascade circuit structure how defeated
Enter inverter, form novel quasi-single-stage new energy distributed power supply system.Quasi-single-stage multi input inverter allows a variety of new energy
Source input, property, amplitude and the characteristic of input source can be identical, can also difference it is very big.Novel quasi-single-stage new energy distribution
Formula electric power system have circuit structure succinct, quasi-single-stage power conversion, in a HF switch period multiple input source simultaneously or
The advantages that timesharing powers to the load, is at low cost.
Therefore, actively seek a kind of quasi-single-stage multi input inverter and its new energy that a variety of new energy is allowed to combine power supply
Distributed power supply system is extremely urgent, for improving stability and the flexibility of system, realize new energy it is preferential utilize or
Making full use of will have a very important significance.
Invention content
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 electrical isolation, energy storage device charging between input
With power switching voltage peak restrained function, the timesharing of multiple input power supply or power to the load simultaneously, circuit topology is succinct, shared
Reliability when output isolation energy storage Transformer Rectifier inversion filter circuit, quasi-single-stage power conversion, conversion efficiency height, load short circuits
How defeated high, the features such as output capacity is small, application prospect is extensive band energy storage device flyback DC converting type quasi-single-stage of powering simultaneously is
Enter inverter.
Technical program of the present invention lies in：A kind of band energy storage device is powered flyback DC converting type quasi-single-stage multi input simultaneously
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 to be isolated the connection of energy storage Transformer Rectifier inversion filter circuit to form, and in bidirectional power flow single-input single-output high-frequency inversion electricity
One is connected between the input filter output terminal of the power switch both ends on road and the n-th road energy storage device, and there is energy storage device to charge
With the circuit of power switching voltage peak restrained function, n is the natural number more than 1, multiple input single output high-frequency inverter circuit
Each input terminal couples with the output terminal one-to-one correspondence of each input filter, the output of multiple input single output high-frequency inverter circuit
The storage transformer input terminal that energy storage Transformer Rectifier inversion filter circuit is isolated with the output is held to be connected, described is how defeated
Enter multiple series series simultaneous selection power switch circuit, bidirectional power flow that single output high-frequency inverter circuit is forward connected by output terminal
Single-input single-output high-frequency inverter circuit sequentially cascades composition, and it is defeated to be equivalent to a bidirectional power flow single input list at any time
Go out high-frequency inverter circuit, every simultaneous selection power switch circuit of series connection all the way is by a two quadrant power switch and one
Power diode is formed and the source electrode of two quadrant power switch is connected with the cathode of power diode, and the two quadrants power is opened
The drain electrode of pass and the anode of power diode are respectively the positive and negative polarity input of road series connection simultaneous selection power switch circuit
End, the source electrode of the two quadrants power switch and the anode of power diode are respectively road series connection simultaneous selection power switch electricity
Energy storage Transformer Rectifier inversion filter circuit is isolated by storage transformer, rectification in the positive and negative polarity output terminal on road, the output
Device, inverter bridge, output filter sequentially cascade composition, the rectifier and inverter bridge by can bear unidirectional voltage stress and
The two quadrant high frequency powers switch of bidirectional current stress is formed, energy storage device charging and power switching voltage peak restrained
Circuit is sequentially cascaded and is formed by clamp diode, clamping capacitance, lamp power switch, fly-wheel diode, filter inductance.
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 have the function of the novel of energy storage device charging and power switching voltage peak restrained
Simultaneous selection of connecting switch quasi-single-stage multi input inverter circuit structure, it is proposed that there is energy storage device charging and power switch electricity
The series connection of pressure peak restrained function is powered flyback DC converting type quasi-single-stage multi input inverter circuit structure and topological race simultaneously
And its energy management control strategy, i.e. the circuit structure is by providing a kind of multi input list that there is series connection simultaneous selection to switch
High-frequency inverter circuit is exported by the multiple not input filter on ground and shared output isolation energy storage Transformer Rectifier inversions altogether
Filter circuit couples, and at the power switch both ends and n-th of bidirectional power flow single-input single-output high-frequency inverter circuit
One is connected between the input filter output terminal of road energy storage device has energy storage device charging and the suppression of power switching voltage spike
The circuit of function processed, n are the natural number more than 1.
The band energy storage device of the present invention is connected while flyback DC converting type quasi-single-stage multi input inverter of powering can incite somebody to action
Multiple input direct-current voltages not altogether, unstable, which are reverse into needed for a load, stablizes good output alternating current, has
Multi-input direct current power supply is not isolated from, exports and input electrical isolation, storage altogether, between multiple input single output high-frequency inverter circuit
Energy equipment charge and power switching voltage peak restrained function, the timesharing of multi input power supply powers to the load, circuit topology simultaneously
Succinctly, output isolation energy storage Transformer Rectifier inversion filter circuit, quasi-single-stage power conversion, conversion efficiency height, input voltage are shared
Variation range is wide, load short circuits when the features such as reliability is high, output capacity is small, application prospect is extensive.Band energy storage device series connection is same
When power flyback DC converting type quasi-single-stage multi input inverter comprehensive performance, will be than traditional DC converter and inverter
The multi input inverter that two-stage cascade forms is superior.
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, novel quasi-single-stage multi input inverter principle block diagram.
Fig. 4, band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter principle block diagram of powering.
Fig. 5, band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter circuit structure chart of powering.
Fig. 6, output voltage instantaneous value SPWM control band energy storage device are connected while flyback DC converting type quasi-single-stage of powering
Steady principle oscillogram when multi input inverter energy storage device charges.
Fig. 7, output voltage instantaneous value SPWM control band energy storage device are connected while flyback DC converting type quasi-single-stage of powering
Steady principle oscillogram when multi input inverter energy storage device discharges.
Fig. 8, band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter circuit topology reality of powering
Example one ----monofocal circuit diagram.
Fig. 9, band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter circuit topology reality of powering
Example two ----paralleling and interleaving monofocal circuit diagram.
Figure 10 has the maximum power output energy management control of output voltage, clamping capacitor voltage separate control loop
Strategy.
Figure 11, monofocal band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter of powering has
The maximum power output energy management control block diagram of output voltage, clamping capacitor voltage separate control loop.
Figure 12, monofocal band energy storage device is connected powers flyback DC converting type quasi-single-stage multi input inverter in n- simultaneously
1 tunnel new energy equipment is powered to load and the n-th road energy storage device --- maximum power output energy management control during-modes I
Principle oscillogram processed.
Figure 13, monofocal band energy storage device is connected powers flyback DC converting type quasi-single-stage multi input inverter in n- simultaneously
1 tunnel new energy equipment and the n-th road energy storage device power to the load simultaneously --- maximum power output energy during-mode II
Manage control principle oscillogram.
Figure 14, monofocal band energy storage device is connected powers flyback DC converting type quasi-single-stage multi input inverter the simultaneously
N roads energy storage device individually powers to the load --- maximum power output energy management control principle oscillogram during-mode III.
Figure 15, paralleling and interleaving monofocal band energy storage device is connected while flyback DC converting type quasi-single-stage multi input of powering is inverse
Becoming utensil has the maximum power output energy management control block diagram of output voltage, clamping capacitor voltage separate control loop.
Figure 16, paralleling and interleaving monofocal band energy storage device is connected while flyback DC converting type quasi-single-stage multi input of powering is inverse
Become Qi n-1 road new energy equipments to load and the n-th road energy storage device power supply --- maximum power output energy during-modes I
Buret manages control principle oscillogram.
Figure 17, paralleling and interleaving monofocal band energy storage device is connected while flyback DC converting type quasi-single-stage multi input of powering is inverse
Become Qi n-1 road new energy equipments and the n-th road energy storage device power to the load simultaneously --- maximum power during-mode II
Export energy management control principle oscillogram.
Figure 18, paralleling and interleaving monofocal band energy storage device is connected while flyback DC converting type quasi-single-stage multi input of powering is inverse
Become the n-th roads of Qi energy storage device individually to power to the load --- maximum power output energy management control principle wave during-mode III
Shape figure.
Specific embodiment
With reference to the accompanying drawings of the specification and embodiment is described further technical scheme of the present invention.
Band energy storage device is powered flyback DC converting type quasi-single-stage multi input inverter simultaneously, is defeated by a multi input list
Go out high-frequency inverter circuit by the multiple not input filter on ground and shared output isolation energy storage Transformer Rectifier inversion filters altogether
Wave circuit connection is formed, and on the power switch both ends of bidirectional power flow single-input single-output high-frequency inverter circuit and the n-th tunnel
One is connected between the input filter output terminal of energy storage device has energy storage device charging and power switching voltage peak restrained
The circuit of function, n are the natural number more than 1, and each input terminal of multiple input single output high-frequency inverter circuit is filtered with each input
The output terminal of wave device corresponds connection, and the output terminal of multiple input single output high-frequency inverter circuit is isolated energy storage with the output and is become
Pressure commutation inversion filter circuit storage transformer input terminal be connected, the multiple input single output high-frequency inverter circuit by
Multiple series series simultaneous selection power switch circuit that output terminal is forward connected, bidirectional power flow single-input single-output high-frequency inversion electricity
Road sequentially cascades composition, is equivalent to a bidirectional power flow single-input single-output high-frequency inverter circuit at any time, described every
All the way series connection simultaneous selection power switch circuit be made of a two quadrant power switch and a power diode and two as
The source electrode of limit power switch is connected with the cathode of power diode, the drain electrode of the two quadrants power switch and power diode
Anode be respectively the road series connection simultaneous selection power switch circuit positive and negative polarity input terminal, the two quadrants power switch
Source electrode and power diode anode be respectively the road series connection simultaneous selection power switch circuit positive and negative polarity output terminal,
Energy storage Transformer Rectifier inversion filter circuit is isolated by storage transformer, rectifier, inverter bridge, output filter in the output
Sequentially cascade is formed, and the rectifier and inverter bridge are by two quadrants that can bear unidirectional voltage stress and bidirectional current stress
High frequency power switch is formed, and energy storage device charging and power switching voltage peak restrained circuit are by clamp diode, pincers
Position capacitance, lamp power switch, fly-wheel diode, filter inductance sequentially cascade composition.
Functional block diagram, circuit with energy storage device series connection while flyback DC converting type quasi-single-stage multi input inverter of powering
Steady principle waveform when structure, output voltage instantaneous value SPWM control inverter energy storage device chargings and during electric discharge, respectively such as
Shown in Fig. 4,5,6,7.In Fig. 4,5,6,7, Ui1、Ui2、…、Uin-1For n-1 roads new energy equipment terminal voltage, (n is more than 1
Natural number), UinFor the n-th road energy storage device (such as accumulator, super capacitor) terminal voltage, ZLFor single-phase output AC load (packet
Include single phase ac passive load and the load of single phase ac power grid), uo、ioRespectively single-phase output alternating voltage and alternating current.n
The single output high-frequency inverter circuit of input is multiple series series simultaneous selection power switch circuit, the two-way work(forward connected by output terminal
Rate stream single-input single-output high-frequency inverter circuit sequentially cascades composition, the multiple series series simultaneous selection that wherein output terminal is forward connected
Power switch circuit is the two quadrant high frequency power selecting switch that can bear unidirectional voltage stress and bidirectional current stress by n
Ss1、Ss2、…、SsnAnd n selection diode Ds1、Ds2、…、DsnForm (power selector switch Ss1、Ss2、…、SsnIt is open-minded simultaneously
Or having phase difference, switching frequency is identical or different, only analyzes S heres1、Ss2、…、SsnIt opens using same switch frequency and simultaneously
Logical control mode), bidirectional power flow single-input single-output high-frequency inverter circuit is to bear unidirectional voltage by one or more
The two quadrant high frequency powers switch composition of stress, bidirectional current stress, can be selected MOSFET, IGBT, GTR constant power device；It is defeated
Go out to be isolated energy storage Transformer Rectifier inversion filter circuit sequentially to be cascaded by storage transformer, rectifier, inverter bridge, output filter
It forms, wherein rectifier is the two quadrant high frequency powers that unidirectional voltage stress, bidirectional current stress can be born by one or two
Switch is formed, and inverter bridge is the two quadrant high frequency powers switch structure that can bear unidirectional voltage stress, bidirectional current stress by four
Into；The energy storage device charging and power switching voltage peak restrained circuit are a kind of decompression (Buck) type DC converters,
It is sequentially to be cascaded and formed by clamp diode, clamping capacitance, lamp power switch, fly-wheel diode, filter inductance, not only negative
The charging unit as the n-th road energy storage device when power is less than the sum of preceding n-1 roads input source maximum power is carried, and can also be inhibited
The due to voltage spikes of bidirectional power flow single-input single-output high-frequency inverter circuit power switch caused by storage transformer leakage inductance.Limit
The circuit diagram of the output capacitance wave filter suitable for passive AC load is only depicted in length, figure, and is not drawn into being suitable for
The circuit diagram of the output capacitance inductance filter of AC network load；N roads input filters 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), using LC
N roads input direct-current electric current can be smoother during wave filter.Fig. 6, steady principle when the n-th road energy storage device is charged and discharged shown in 7
Situation when waveform corresponds respectively to bearing power smaller and larger than the sum of preceding n-1 roads input source maximum power, the single output of n inputs
High-frequency inverter circuit is by n roads input direct-current voltage source Ui1、Ui2、…、UinIt is modulated into the unipolarity that amplitude is distributed by sinusoidal envelope line
Tri-state multi slope SPWM current waves iN1, it is demodulated to amplitude through storage transformer T isolation and rectifier and is distributed by sinusoidal envelope line
Unipolarity tri-state single-slope SPWM current waves iN2, in single phase ac passive load or list after inverter bridge and output filter capacitor
Phase alternating current obtains the sinusoidal voltage u of high quality on the netoOr simple sinusoidal alternating current io, the single output high-frequency inverter circuit of n inputs
N input pulse electric current through input filter Li1-Ci1、Li2-Ci2、…、Lin-CinOr Ci1、Ci2、…、CinIt is inputted afterwards on n roads
DC power supply Ui1、Ui2、…、UinIt is middle to obtain smooth input direct-current electric current Ii1、Ii2、…、Iin.It is it should be added that double
Polarity binary states multilevel SPWM voltage wave uABAmplitude be+(Ui1+Ui2+…+Uin) and Ui1+Ui2+…+Uin-UCc(Fig. 6) or(Fig. 7), unipolarity tri-state multilevel SPWM current wave iN1Slope be respectively (Ui1+Ui2+…+Uin-UCc)/L1
(only Fig. 6 has), (Ui1+Ui2+…+Uin)/L1、(Ui1+Ui2+…+Uin-1)/L1、…、Ui1/L1, unipolarity tri-state list level SPWM
Current wave iN2Descending slope be-uo/L2, wherein UoTo export sinusoidal voltage virtual value, UCcFor clamping capacitance CcTerminal voltage,
L1、L2The respectively inductance of the former and deputy side winding of storage transformer.
It is inverse that the series connection of band energy storage device while flyback DC converting type quasi-single-stage multi input inverter of powering belong to buck-boost type
Become device, n input source both can also can simultaneously be powered to the load with timesharing, and principle is equivalent to multiple input source and becomes in energy storage type
The superposition of magnetic flux or the current increment generated in storage transformer primary side inductance generated in depressor.If power selector switch
Ss1、Ss2、…、SsnSwitching frequency is identical and open-minded simultaneously, and duty ratio is respectively d1、d2、…、dn, d1＞ d2＞ ... ＞ dn, according to
The increment of positive magnetic flux is approximately equal to the increment of counter magnetic flux and can push away in one HF switch period during storage transformer stable state
Export output voltage uoWith input direct-current voltage (Ui1、Ui2、…、Uin), the storage transformer turn ratio (N2/N1), duty ratio (d1、
d2、…、dn) between relationship, i.e. uo=(d1Ui1+d2Ui2+…+dnUin)N2/[N1(1-d1)].For appropriate duty ratio (d1、
d2、…、dn) and the storage transformer turn ratio (N2/N1), uoIt can be greater than, equal to or less than the sum of input direct-current voltage Ui1+Ui2
+…+Uin, the storage transformer in the inverter not only plays the security reliability and electromagnetic compatibility for improving invertor operation
Property, it is often more important that play the role of matched output voltage and input voltage, that is, the output voltage for realizing inverter is higher than,
Equal to or less than the sum of input direct-current voltage Ui1+Ui2+…+UinTechnique effect, application range obtained widening significantly.When
0.5 ＜ d11 or 0 ＜ d of ＜1During ＜ 0.5, it is respectively present uo＞ (Ui1+Ui2+…+Uin)N2/N1Or uo＜ (Ui1+Ui2+…+Uin)N2/
N1, i.e. output voltage uoHigher or lower than input direct-current voltage (Ui1、Ui2、…、Uin) and the storage transformer turn ratio (N2/N1)
The sum of products (Ui1+Ui2+…+Uin)N2/N1；Since the inverter belongs to quasi-single-stage circuit structure, there is storage in output with input
Energy formula transformer isolation, the single output high-frequency inverter circuit of n inputs are provided with the multiple series series simultaneous selection that output terminal is forward connected
Power switch circuit, and stored up at the power switch both ends of bidirectional power flow single-input single-output high-frequency inverter circuit and the n-th tunnel
One can be connected with energy storage device charging and power switching voltage peak restrained work(between the input filter output terminal of equipment
The circuit of energy, therefore by this kind of inverter referred to as with energy storage device series connection while flyback DC converting type (buck-boost type) quasi- list of powering
Grade multi input inverter.For storage transformer there are two kinds of working methods of high frequency magnetic reset and low frequency magnetic reset, the former is energy storage
Formula transformer realizes magnetic-reset within a HF switch period, because power it is not reversible flowing due to be operated in DCM patterns and
Using constant frequency SPWM control strategies, no audio noise belongs to annulus inverter in high frequency；The latter is that storage transformer is defeated at one
Go out and magnetic-reset is realized in the low-frequency cycle, be operated in CCM patterns and use constant frequency SPWM control strategies, have audio noise, do not belong to
In annulus inverter in high frequency.N input source timesharing of the inverter simultaneously powers to output AC load, and duty ratio can phase
With (d1=d2=...=dn), it can also be different (d1≠d2≠…≠dn)。
Band energy storage device series connection of the present invention while flyback DC converting type quasi-single-stage multi input inverter of powering, by
In a shared multiple input single output high-frequency inverter circuit and an output isolation energy storage Transformer Rectifier inversion filter circuit, and
At the power switch both ends of bidirectional power flow single-input single-output high-frequency inverter circuit and the input filter of the n-th road energy storage device
A circuit with energy storage device charging and power switching voltage peak restrained is connected between output terminal, with DC converting
There is differences substantially for the circuit structure of traditional multi input inverter that device and inverter two-stage cascade are formed.Therefore, originally
The inverter is invented with novelty and creativeness, and with output and input electrical isolation, the timesharing of multi input power supply or
Power simultaneously, circuit topology is succinct, energy storage device charging and power switching voltage peak restrained function, quasi-single-stage power conversion,
Buck than it is big, change range of input voltage is wide, input voltage prepare flexibly, conversion efficiency high (meaning that energy loss is small),
The features such as reliability is high during load short circuits, output capacity is small, at low cost, application prospect is extensive is a kind of ideal energy-saving
Type quasi-single-stage multi input inverter builds energy-saving, conservation-minded society today, with more important value vigorously advocating.
Band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter circuit topology race implementation of powering
Example, as shown in Figure 8,9.In circuit shown in Fig. 8-9, the multiple series series simultaneous selection power switch circuit that output terminal is forward connected is equal
Unidirectional voltage stress, the two quadrant high frequency powers switch of bidirectional current stress and n diode can be born by n to form, and it is double
Unidirectional voltage stress, bidirectional current stress can be born by one or two to power flow single-input single-output high-frequency inverter circuit
Two quadrant high frequency powers switch is formed, and output rectifier is then made of one or two two quadrant high frequency powers switches, inverter bridge
Is made of four two quadrant high frequency powers switch, energy storage device charging with power switching voltage peak restrained circuit by one or
Two clamp diodes, a clamping capacitance, lamp power switch, a fly-wheel diode, a filter inductance are sequentially
Cascade is formed.Precisely, monofocal circuit shown in Fig. 8 is to bear unidirectional voltage stress, bidirectional current stress by n+7
Two quadrant high frequency powers are switched to be realized with n+2 diode, and the circuit of paralleling and interleaving monofocal shown in Fig. 9 can be held by n+9
It is realized by the two quadrant high frequency powers switch of unidirectional voltage stress, bidirectional current stress and n+3 diode.It requires supplementation with
Bright, circuit shown in Fig. 8-9 gives input filter as LC wave filters and the output capacitance suitable for passive AC load
Wave filter situation does not provide input filter as capacitive filter and the output capacitance loaded suitable for AC network as space is limited
Circuit during inductance filter situation.Band energy storage device is connected while flyback DC converting type quasi-single-stage multi input inverter of powering
The power switching voltage stress of topological embodiment, as shown in table 1.In table 1, UoTo export sinusoidal voltage uoVirtual value, UCcFor
Clamping capacitance CcTerminal voltage.The circuit topology race is suitable for changing into multiple input dc power bucklings not altogether, unstable
One required voltage swing stablizes good output alternating current, can be used to realize with excellent performance and wide application prospect
The novel a variety of new energy distributed power supply systems of quasi-single-stage, such as photovoltaic cell 40-60VDC/220V50HzAC or
115V400HzAC, Proton Exchange Membrane Fuel Cells 85-120V/220V50HzAC or 115V400HzAC, middle-size and small-size family wind
Power power generation 24-36-48VDC/220V50HzAC or 115V400HzAC, large-scale wind generating 510VDC/220V50HzAC or
The multiple input sources such as 115V400HzAC power to AC load or AC network.
Table 1 is connected with energy storage device while flyback DC converting type quasi-single-stage multi input inverter topology embodiment 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 ratios be controlled, that is, there are multiple controls
Degree of freedom, this energy management just for a variety of new energy provide possibility.Band energy storage device is connected while flyback direct current of powering
The energy management control strategy of changing type quasi-single-stage multi input inverter need to be provided simultaneously with energy management, the photovoltaic electric of input source
MPPT, output voltage (electric current) the control three zones of the new energy equipments such as pond and wind-driven generator, also need to consider energy storage
Smooth and seamless switching of the charge and discharge control and system of equipment under different powering modes.
Band energy storage device is connected powers flyback DC converting type quasi-single-stage multi input inverter using with output electricity simultaneously
The maximum power output energy management control strategy of pressure, clamping capacitor voltage separate control loop, as shown in Figure 10.According to load
The charge and discharge of the relative size of the sum of power and preceding n-1 roads input source maximum power the n-th road energy storage device of control in real time, before realization
The smooth and seamless switching of the maximum power output of n-1 roads input source, the stabilization of inverter output voltage and three kinds of operating modes.When
When bearing power is less than the sum of preceding n-1 roads input source maximum power, preceding n-1 roads input source is in a manner of maximum power output to load
Power supply, and remaining power by energy storage device charging and power switching voltage peak restrained circuit to the n-th road energy storage device
(such as accumulator, super capacitor) charges, and inverter is operated in modes I；When bearing power is more than preceding n-1 roads input source maximum work
During the sum of rate, for preceding n-1 roads input source with maximum power output, the n-th road energy storage device supplies the deficit power needed for load, preceding n-
1 road input source and the n-th road energy storage device are powered to the load simultaneously in a manner of principal and subordinate's power distribution, and inverter is operated in mode II；
During the input source inactivity output of current n-1 roads, the n-th road energy storage device individually powers to the load, and inverter is operated in mode III；Three
Under kind operating mode, energy storage device charging and power switching voltage peak restrained circuit also act and inhibit storage transformer leakage
The effect of bidirectional power flow single-input single-output high-frequency inverter circuit power switching voltage spike caused by sense.When the new energy in n-1 roads
The input voltage in source to timing, by control the 1st, 2 ..., the input current of n-1 roads input source, be equivalent to control the
1st, 2 ..., the input power of n-1 roads input source.
Magnetic-reset is realized within an output low frequency period with storage transformer, is operated in CCM patterns and using permanent
For frequency SPWM control strategies, the energy management control strategy of this kind of inverter is discussed.Band energy storage device is connected powers instead simultaneously
Sharp DC changing type quasi-single-stage multi input inverter uses the maximum with output voltage, clamping capacitor voltage separate control loop
Power output energy management control strategy, to form autonomous power supply system, as shown in Figure 11-18.Figure 11,12,13,14 are single-ended
The control principle waveform of the control block diagram of formula inverter and three kinds of operating modes, Figure 15,16,17,18 are paralleling and interleaving monofocal
The control principle waveform of the control block diagram of inverter and three kinds of operating modes, the two are inherently similar；In figure, output filter
Wave capacitance CfWith loading ZLParallel equivalent impedance in capacitive, the fundametal compoment i of secondary winding currentN21It is ahead of output voltage
uo.The basic thought of the control program is that the single high-frequency inverter circuit that exports of n inputs is by n roads input direct-current voltage source Ui1、Ui2、…、
UinIt is modulated into the unipolarity tri-state multi slope SPWM current waves i that amplitude is distributed by sinusoidal envelope lineN1, the 1st, 2 ..., n-1 roads choosing
The turn-on time for selecting power switch is to hand over to cut with sawtooth wave again according to the product of error current size and reference sinusoidal synchronizing signal
Obtain (realize the 1st, 2 ..., the maximum power output of n-1 roads input source), the turn-on time of the n-th tunnel selection power switch be by
It intercepts and captures according to error voltage size and sawtooth wave friendship and (realizes supplying for the n-th tunnel input source power), the 1st tunnel selection power switch
Turn-on time is the turn-on time of inverse switch, and amplitude is demodulated to by sine through storage transformer T (T ') isolation and rectifier
The unipolarity tri-state single-slope SPWM current waves i of envelope distributionN2, after inverter bridge and output filter capacitor single phase ac without
Source load or single-phase alternating current obtain the sinusoidal voltage u of high quality on the netoOr simple sinusoidal alternating current io；It is clamped by adjusting
Capacitance voltage error signal and output voltage error signal realize the steady of clamping capacitor voltage and inverter output voltage respectively
It is fixed.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, error amplification signal I through proportional and integral controller1e、
I2e、…、I(n-1)eI is obtained with reference sinusoidal signal multiplication1e、i2e、…、i(n-1)e, the output voltage feedback signal u of inverterofWith base
Quasi sine voltage uorCompare amplification through proportional and integral controller and obtain voltage error amplified signal uoe, i1e、i2e、…、i(n-1)e、
uoeAbsolute value signal respectively with unipolarity saw-toothed carrier uc1Comparison and uoeAbsolute value signal and unipolarity saw-toothed carrier
uc2Compare, and the power switch control signal of monofocal circuit topology shown in Figure 11 is obtained after appropriate combinational logic circuit
ugss1、ugss2、…、ugssn、ugs1、ugs2、ugs3、ugs4、ugs5、ugs6Or the work(of the circuit topology of paralleling and interleaving monofocal shown in Figure 15
Rate switch control signal ugss1、ugss2、…、ugssn、ugs1(ugs1′)、ugs2(ugs2′)、ugs3、ugs4、ugs5、ugs6；Clamping capacitance end
Voltage feedback signal uCcfWith reference voltage uCcrCompare amplification through proportional and integral controller and obtain voltage error amplified signal uCce,
uCceWith unipolarity saw-toothed carrier uc1Compare to obtain Figure 11, clamp switch shown in 15 control signal ugsc。
During output voltage positive half cycle, S4、S5Cut-off, S6Normal open；During output voltage negative half period, S3、S6Cut-off, S4Normal open.With
For output voltage positive half cycle, as bearing power PL<The maximum power P of n-1 roads new energy equipment1max+P2max+…+
Pn-1maxWhen, output voltage uoIncrease, the output signal u of error amplifier noe＜ 0 ,-uoe＞ 0, comparison circuit n output low level,
The selecting switch S of energy storage devicesnCut-off, comparison circuit n ' output pwm signals and and S1(or S1+S1') complementary signal phase with
To S1(or S1+S1') cut-off during (1-D) Ts(or (1-2D) Ts) part-time as release can bridge arm S3Control signal, and
In (1-D) Ts(or (1-2D) Ts) during remaining time in transformer energy storage inductor pass through diode D1(or D1、D1') to clamp
Capacitance CcIt releases energy, clamping capacitor voltage uCcIncrease, error amplifier n+1 output signals uCce＞ 0, comparison circuit n+1 are exported
Buck clamp circuits ScPwm control signal, to the n-th road energy storage device charging, realize the new energy equipment timesharing of n-1 roads
To load ZLWith the n-th road energy storage device power supply -- modes I；As bearing power PL>The maximum power of n-1 roads new energy equipment
P1max+P2max+…+Pn-1maxWhen, output voltage uoReduce, the output signal u of error amplifier noe＞ 0 ,-uoe＜ 0, through comparing
Circuit n exports the selecting switch S of energy storage devicesnPwm control signal, energy storage switch S1(or S1、S1') control signal by selecting
Select switch Ss1、Ss2、…、SsnBy or door obtain, comparison circuit n ' outputs high level and and S1(or S1+S1') complementary signal
Mutually with obtaining releasing energy bridge arm S3Control signal, realize n-1 road new energy equipments and the n-th road energy storage device in a switch
Simultaneously to load Z in periodLPower supply -- mode II, it is clear that the n-th road energy storage device individually powers to the load -- mode III belongs to mould
The egregious cases of formula II.Therefore, there is output voltage, clamping capacitor voltage separate control loop most using shown in Figure 11,15
It is stable, defeated to realize n-1 roads new energy equipment MPPT, clamping capacitor voltage for high-power output energy management control strategy
Go out the smooth and seamless switching between voltage stabilization and three kinds of different powering modes.
Control principle waveform has marked HF switch cycle T shown in Figure 12,13,14,16,17,18S, a certain HF switch
Cycle TSInterior 1st, 2 ..., the turn-on time T of n roads input sourceon1、Ton2、…、TonnWith the turn-on time T of inverse switchon=Ton1
(modes I, mode II) or Ton=Tonn(mode III), the turn-on time T of inverse switchonWithin an output voltage period be by
Sinusoidal rule variation.
Claims (3)
- The flyback DC converting type quasi-single-stage multi input inverter 1. a kind of band energy storage device is powered simultaneously, 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 to be isolated the connection of energy storage Transformer Rectifier inversion filter circuit to form, and in bidirectional power flow single-input single-output high-frequency inversion electricity One is connected between the input filter output terminal of the power switch both ends on road and the n-th road energy storage device, and there is energy storage device to charge With the circuit of power switching voltage peak restrained function, n is the natural number more than 1, multiple input single output high-frequency inverter circuit Each input terminal couples with the output terminal one-to-one correspondence of each input filter, the output of multiple input single output high-frequency inverter circuit The storage transformer input terminal that energy storage Transformer Rectifier inversion filter circuit is isolated with the output is held to be connected, described is how defeated Enter multiple series series simultaneous selection power switch circuit, bidirectional power flow that single output high-frequency inverter circuit is forward connected by output terminal Single-input single-output high-frequency inverter circuit sequentially cascades composition, and it is defeated to be equivalent to a bidirectional power flow single input list at any time Go out high-frequency inverter circuit, every simultaneous selection power switch circuit of series connection all the way is by a two quadrant power switch and one Power diode is formed and the source electrode of two quadrant power switch is connected with the cathode of power diode, and the two quadrants power is opened The drain electrode of pass and the anode of power diode are respectively the positive and negative polarity input of road series connection simultaneous selection power switch circuit End, the source electrode of the two quadrants power switch and the anode of power diode are respectively road series connection simultaneous selection power switch electricity Energy storage Transformer Rectifier inversion filter circuit is isolated by storage transformer, rectification in the positive and negative polarity output terminal on road, the output Device, inverter bridge, output filter sequentially cascade composition, the rectifier and inverter bridge by can bear unidirectional voltage stress and The two quadrant high frequency powers switch of bidirectional current stress is formed, energy storage device charging and power switching voltage peak restrained Circuit is sequentially cascaded and is formed by clamp diode, clamping capacitance, lamp power switch, fly-wheel diode, filter inductance.
- The flyback DC converting type quasi-single-stage multi input inverter 2. band energy storage device according to claim 1 is powered simultaneously, It is characterized in that：It is described power flyback DC converting type quasi-single-stage multi input inverter simultaneously with energy storage device circuit topology be Monofocal, paralleling and interleaving monofocal circuit.
- The flyback DC converting type quasi-single-stage multi input inverter 3. band energy storage device according to claim 1 is powered simultaneously, It is characterized in that：The band energy storage device powers flyback DC converting type quasi-single-stage multi input inverter using maximum power simultaneously Energy management control strategy is exported, is controlled in real time according to the relative size of bearing power and the sum of preceding n-1 roads input source maximum power The charge and discharge of the n-th road energy storage device are made, the stabilization of the maximum power output of n-1 roads input source, inverter output voltage before realization With the smooth and seamless switching of three kinds of operating modes；When bearing power is less than the sum of preceding n-1 roads input source maximum power, preceding n-1 Road input source is powered to the load in a manner of maximum power output and by energy storage device charging and power switching voltage peak restrained Circuit is operated in modes I to the n-th road energy storage device charging, inverter；When bearing power is more than preceding n-1 roads input source maximum power The sum of when, preceding n-1 roads input source and the n-th road energy storage device are powered to the load simultaneously in a manner of principal and subordinate's power distribution, inverter work Make in mode II；During the input source inactivity output of current n-1 roads, the n-th road energy storage device individually powers to the load, inverter work In mode III；Under three kinds of operating modes, energy storage device charging and power switching voltage peak restrained circuit can also inhibit energy storage type The due to voltage spikes of bidirectional power flow single-input single-output high-frequency inverter circuit power switch caused by transformer leakage inductance.
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| CN201810019755.4A CN108206645A (en) | 2018-01-09 | 2018-01-09 | Band energy storage device is powered flyback DC converting type quasi-single-stage multi input inverter simultaneously |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228376A (en) * | 2019-06-13 | 2019-09-13 | 山东潍氢动力科技有限公司 | Hydrogen powered vehicle high-voltage charging system and its control system |
| CN113262038A (en) * | 2021-06-19 | 2021-08-17 | 安徽奥弗医疗设备科技股份有限公司 | Power supply control system of plasma scalpel |
-
2018
- 2018-01-09 CN CN201810019755.4A patent/CN108206645A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228376A (en) * | 2019-06-13 | 2019-09-13 | 山东潍氢动力科技有限公司 | Hydrogen powered vehicle high-voltage charging system and its control system |
| CN110228376B (en) * | 2019-06-13 | 2021-06-08 | 山东潍氢动力科技有限公司 | High-voltage charging system of hydrogen fuel automobile and control system thereof |
| CN113262038A (en) * | 2021-06-19 | 2021-08-17 | 安徽奥弗医疗设备科技股份有限公司 | Power supply control system of plasma scalpel |
| CN113262038B (en) * | 2021-06-19 | 2024-04-16 | 安徽奥弗医疗设备科技股份有限公司 | Plasma scalpel power control system |
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