CN105577012A - Hybrid five-level current converter and control method thereof - Google Patents
Hybrid five-level current converter and control method thereof Download PDFInfo
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- CN105577012A CN105577012A CN201610145767.2A CN201610145767A CN105577012A CN 105577012 A CN105577012 A CN 105577012A CN 201610145767 A CN201610145767 A CN 201610145767A CN 105577012 A CN105577012 A CN 105577012A
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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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
Abstract
The invention discloses a hybrid five-level current converter and a control method thereof. The current converter is formed by a three-level T-shaped current converter topology and a conventional two-level current converter topology through hybrid evolution. The single-phase topology of the current converter can be divided into two parts based on difference of withstanding voltage and switching frequency of a device: a high-voltage low-frequency unit and a low-voltage high-frequency unit. The current converter adopts a hybrid modulation method, a high-voltage low-frequency unit device works under fundamental frequency modulation and a low-voltage high-frequency unit device works high-frequency multicarrier SPWM modulation so that the device with high withstanding voltage value and low switching frequency can be selected in the high-voltage low-frequency unit, the device with high switching speed and low withstanding voltage can be selected in the low-voltage high-frequency unit, and thus power consumption of the current converter can be reduced and efficiency can be enhanced. According to the novel hybrid five-level current converter, less devices are adopted, output electric energy quality is great and efficiency is high, and the hybrid five-level current converter also has advantages of being low in power consumption and easy to modularize.
Description
Technical field
The present invention relates to power electronics Multilevel Inverters field, be specifically related to a kind of hybrid five-level current transformer and control method thereof.
Background technology
Power electronic technology is since the twentieth century birth fifties, through the develop rapidly of nearly half a century, so far be widely used in the every field needing transformation of electrical energy, at the low power electrical domain of low pressure, oneself is gradually ripe for the various aspects of power electronic technology.Goal in research is in the future high power density, high efficiency, high-performance, and in the power transmission and distribution field of high-power, the technology of various aspects is just becoming the research emphasis of current power electronic technology.In the solution realizing high-power conversion, Multilevel Inverters is because its control mode is various, output waveform percent harmonic distortion is low, power device voltage stress is low, electromagnetic interference (ElectroMagneticInterference, EMI) less, the high good characteristic of efficiency become high-power application focus, the concept of Multilevel Inverters is proposed in IAS meeting in 1980 by people such as A.Nbaae the earliest.Wherein multi-level voltage source type current transformer is because of the focus that its control mode is various, output current harmonics content is low, the high good characteristic of efficiency has become high-power application, the fields such as such as high-voltage motor frequency control, high voltage direct current transmission, Research on Unified Power Quality Conditioner, superconducting energy storage and high power UPS.R.H.Baker proposed the concept of cascaded H-bridges Multilevel Inverters the earliest in 1975; The people such as Japanese scholars A.Nabae, H.Akagi propose neutral-point-clamped type many level PWMs inverter in nineteen eighty-three; T.A.Meynard proposed striding capacitance type multi-electrical level inverter in 1992.Although three kinds of traditional Multilevel Inverters can realize voltage with multiple levels and export, need a large amount of clamp diodes, striding capacitance or independent power supply, thus can make systems bulky, reliability reduces, and cost increases.
Along with the application of Multilevel Inverters is more and more extensive, how can simplify its structure further, reduce the device for power switching used, reduce its volume and cost also more and more comes into one's own, and along with the development of power semiconductor technology, how to make full use of the very fast but withstand voltage lower device (as IGBT) of switching speed and the higher but device that switching frequency is lower of withstand voltage (as GTO, IGCT) respective advantage, makes system configuration more optimize and is also subject to extensive concern.Last century the nineties, India scholar Madhav proposes the concept of mixed multi-level first and research finds that this technology will break through traditional constraint realizing high-power technological thought, in same circuit topological structure, adopt the switching device of different capacity, make to become possibility together with the switching device collaborative works such as IGBT with GTO, and under making power device be operated in different switching frequencies by mixing control method, thus maximize favourable factors and minimize unfavourable ones and give full play to its own advantages of various device.
The modulation strategy of Multilevel Inverters, according to the height of switching frequency, can be divided into fundamental frequency modulation and high frequency modulated.Under fundamental frequency modulation, each device for power switching switch once or twice in a power frequency period of current transformer, the alternating voltage of output is staircase waveform, and more typical fundamental frequency modulation method has the prefabricated modulation method of switching point and Staircase wave method.Under high frequency modulated, each switching device of current transformer understands switch repeatedly in a power frequency period, and this kind of modulator approach mainly contains sinusoidal pulse width modulation (SPWM) and space vector modulation (SVM).The various control strategies such as such as carrier wave is stacked, phase-shifting carrier wave, frequency optimization, the specific subharmonic of elimination, space voltage vector are there is at present.
Summary of the invention
Goal of the invention: complicated in order to solve current traditional multi-level converter structure, volume is larger, control the problem that complexity is larger, the invention discloses a kind of novel hybrid five-level current transformer and control method thereof, adopt hybrid modulation method to realize the output of many level, Multilevel Inverters structure can be simplified, reduce the quantity of power switches used, reduce its volume and cost, thus system configuration can be made more to optimize.For proposed Multilevel Inverters topology, also propose to adopt hybrid modulation method to realize the output of many level, current transformer power loss can be reduced further, raise the efficiency.
Technical scheme: a kind of hybrid five-level current transformer, is developed by the T-shaped converter topology of three level and traditional two level current transformer Topologically mixing and forms.Withstand voltage different with switching frequency based on device, this converter topology comprises three-phase brachium pontis, and every phase brachium pontis is divided into two unit: high pressure low frequency cell and low-voltage high-frequency unit;
Described high pressure low frequency cell is made up of brachium pontis and DC bus under brachium pontis, two level on two level; On described two level, brachium pontis is by the first power switch pipe VT
1emitter and the second power switch pipe VT
2collector electrode be formed by connecting, under described two level, brachium pontis is by the 3rd power switch pipe VT
3emitter and the 4th power switch pipe VT
4collector electrode be formed by connecting, described DC bus is in series by two the first electrochemical capacitors;
Second power switch pipe VT in brachium pontis on described two level
2emitter and two level under the 3rd power switch pipe VT in brachium pontis
3collector electrode be connected, the first power switch pipe VT in brachium pontis on two level
1collector electrode be connected with the positive ends of DC bus, the 4th power switch pipe VT in brachium pontis under two level
4emitter be connected with the negative polarity end of DC bus;
Described low-voltage high-frequency unit is by the T-shaped brachium pontis of three level and fly to form across electrochemical capacitor; The T-shaped brachium pontis of described three level comprises by the 5th power switch pipe VT
5form upper half-bridge brachium pontis, by the 8th power switch pipe VT
8form lower half-bridge brachium pontis and by the 6th power switch pipe VT
6emitter connect the 7th power switch pipe VT
7emitter composition neutral-point-clamped brachium pontis, described in fly to be in series by two the second electrochemical capacitors across electrochemical capacitor;
5th power switch pipe VT of upper half-bridge brachium pontis in the T-shaped brachium pontis of described three level
5collector electrode be connected with the positive ends flown across electrochemical capacitor, the 8th power switch pipe VT of lower half-bridge brachium pontis in the T-shaped brachium pontis of three level
8emitter be connected with the negative polarity end flown across electrochemical capacitor, the 5th power switch pipe VT of upper half-bridge brachium pontis
5emitter and the 8th power switch pipe VT of lower half-bridge brachium pontis
8collector electrode be connected, the 6th power switch pipe VT of described neutral-point-clamped brachium pontis
6collector electrode be connected with the mid point flown across electrochemical capacitor, the 7th power switch pipe VT
7collector electrode be connected to ac output end
x; Described
xfor A cross streams output a, B cross streams output b, C cross streams output c;
In described high pressure low frequency cell, on two level, the mid point of brachium pontis is connected with the positive ends flown across electrochemical capacitor in low-voltage high-frequency unit; Under high pressure low frequency cell two level, the mid point of brachium pontis is connected with the negative polarity end flown in low-voltage high-frequency unit across electrochemical capacitor.
Further, the magnitude of voltage of described first electrochemical capacitor is the twice of the second electrochemical capacitor magnitude of voltage.
Further, all in described high pressure low frequency cell power switch pipes select withstand voltage higher but the device that switching frequency is lower; Power switch pipe selector switch speed all in described low-voltage high-frequency unit but withstand voltage lower device.
Further, described withstand voltage is higher but the device that switching frequency is lower is turn-off thyristor GTO, integrated gate commutated thyristor IGCT.
Further, described switching speed is very fast but withstand voltage lower device is insulated gate bipolar transistor IGBT, metal-oxide half field effect transistor MOSFET.
The present invention also provides a kind of control method to described hybrid five-level current transformer, adopts hybrid modulation stratgy, under in high pressure low frequency cell, power switch pipe works in fundamental frequency modulation, wherein, and power switch pipe VT
1and VT
3conducting simultaneously, VT
2and VT
4conducting simultaneously, and VT
1and VT
4complementary conducting; Under in low-voltage high-frequency unit, power switch pipe is operated in multicarrier SPWM pulse-width modulation, wherein, power switch pipe VT
5and VT
7complementary conducting, VT
6and VT
8complementary conducting; Work as VT
6conducting, VT
8during shutoff, VT
5and VT
7alternating, complementary conducting; Work as VT
7conducting VT
5during shutoff, VT
6and VT
8alternating, complementary conducting.Table 1 is depicted as current transformer power switch pipe on off state and corresponding AC output voltage.
Table 1 current transformer power switch pipe on off state and corresponding AC output voltage
| On off state | S 1 | S 2 | S 3 | S 4 | S 5 | S 6 | S 7 | S 8 | AC exports phase voltage |
| 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | -E |
| 2 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | -E/2 |
| 3 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
| 4 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | E/2 |
| 5 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | E |
Wherein: S
nrepresent all VT in three-phase brachium pontis
nstate, 1 for conducting, and 0 for turning off, n=1 ~ 6.
Under identical five level conditions of output, the contrast of Three phase hybrid five-level current transformer of the present invention and diode clamp type, striding capacitance clamper type and Cascade H bridge type three kinds of traditional Five-level converters is as shown in table 2.
The contrast of table 2 Three phase hybrid five-level current transformer and traditional Five-level converter
Beneficial effect: compared to traditional multi-level current transformer, one disclosed by the invention novel hybrid five-level current transformer and control method thereof have following advantage:
(1) compare with diode clamp type and striding capacitance clamper type two kinds of Multilevel Inverters, when exporting same level number, do not need additionally to increase clamp diode, the power switch pipe quantity used, striding capacitance quantity and isolation drive quantity all greatly reduce, therefore, reduce converter system volume and complexity, reduce cost.Compared with Cascade H bridge type Multilevel Inverters, this Three phase mixed multi-level current transformer, when exporting same level number, decreases independently-powered independent current source and transformer usage quantity.
(2) this hybrid five-level current transformer adopts hybrid modulation method, and high pressure low frequency cell power switch pipe runs on fundamental frequency modulation condition, can choose the higher but device (as GTO, IGCT) that switching frequency is lower of withstand voltage; Low-voltage high-frequency cell power switching tube runs on high frequency modulated state, can choose the very fast but withstand voltage lower device (as IGBT, MOSFET) of switching speed, thus can reduce power loss, improves current transformer efficiency.
(3) high pressure low frequency cell is made up of in parallel with dc-link capacitance after two half-bridge brachium pontis series connection, and two half-bridge brachium pontis share DC buss, decrease independently-powered DC power supply quantity, have saved volume and cost.
Accompanying drawing explanation
Fig. 1 is conventional diode clamper type, striding capacitance clamper type and Cascade H bridge type Five-level converter topology diagram;
Fig. 2 is the novel hybrid five-level converter topologies figure of the present invention;
Fig. 3 is based on the stacked hybrid modulation method schematic diagram of multicarrier homophase; Fig. 3 (a) is depicted as modulation wave signal and the stacked carrier signal of homophase; Fig. 3 (b) is depicted as the output voltage waveforms of low-voltage high-frequency unit; Fig. 3 (c) is depicted as the output voltage waveforms of high pressure low frequency cell; Fig. 3 (d) is depicted as AC side of converter output voltage waveforms.
Fig. 4 is the change of current path of the novel hybrid five-level current transformer of the present invention; Current time power switch pipe VT shown in Fig. 4 (a)
1, VT
3, VT
5and VT
6be in conducting state, AC side of converter output voltage is+E; Subsequent time turns off VT
5, trigger VT
7conducting, output voltage is+E/2 by current transformer, as shown in Table 1, current transformer state by state [5] change of current to state [4]; Shown in Fig. 4 (b), current current transformer state is state [4]; Shown in Fig. 4 (c), current current transformer is state [3]; Shown in Fig. 4 (d), current current transformer is state [2];
Fig. 5 is the linear relationship between output current phase fundamental voltage amplitude and modulation index;
The output voltage that Fig. 6 is modulation index m when being 0.3 and current simulations waveform.
The output voltage that Fig. 7 is modulation index m when being 0.6 and current simulations waveform.
The output voltage that Fig. 8 is modulation index m when being 0.9 and current simulations waveform.
Embodiment
Below in conjunction with accompanying drawing the present invention done and further explain.
As Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c) are respectively the traditional Five-level converter topological structure of diode clamp type, striding capacitance clamper type and Cascade H bridge type three kinds.
Figure 2 shows that a kind of hybrid five-level current transformer disclosed by the invention, developed by the T-shaped converter topology of three level and traditional two level current transformer Topologically mixing and form.Withstand voltage different with switching frequency based on device, this converter topology comprises three-phase brachium pontis, and every phase brachium pontis is divided into two unit: high pressure low frequency cell 1 and low-voltage high-frequency unit 2;
Described high pressure low frequency cell 1 is made up of brachium pontis 12 and DC bus 13 under brachium pontis on two level 11, two level; On described two level, brachium pontis 11 is by the first power switch pipe VT
1emitter and the second power switch pipe VT
2collector electrode be formed by connecting, under described two level, brachium pontis 12 is by the 3rd power switch pipe VT
3emitter and the 4th power switch pipe VT
4collector electrode be formed by connecting, described DC bus 13 is in series by two the first electrochemical capacitors;
Second power switch pipe VT in brachium pontis 11 on described two level
2emitter and two level under the 3rd power switch pipe VT in brachium pontis 12
3collector electrode be connected, the first power switch pipe VT in brachium pontis 11 on two level
1collector electrode be connected with the positive ends of DC bus 13, the 4th power switch pipe VT in brachium pontis 12 under two level
4emitter be connected with the negative polarity end of DC bus 13;
Described low-voltage high-frequency unit 2 is by the T-shaped brachium pontis 21 of three level and fly to form across electrochemical capacitor 22; The T-shaped brachium pontis 21 of described three level comprises by the 5th power switch pipe VT
5form upper half-bridge brachium pontis, by the 8th power switch pipe VT
8form lower half-bridge brachium pontis and by the 6th power switch pipe VT
6emitter connect the 7th power switch pipe VT
7emitter composition neutral-point-clamped brachium pontis, described in fly to be in series by two the second electrochemical capacitors across electrochemical capacitor 22;
5th power switch pipe VT of upper half-bridge brachium pontis in the T-shaped brachium pontis 21 of described three level
5collector electrode be connected with the positive ends flown across electrochemical capacitor 22, the 8th power switch pipe VT of lower half-bridge brachium pontis in the T-shaped brachium pontis 21 of three level
8emitter be connected with the negative polarity end flown across electrochemical capacitor 22, the 5th power switch pipe VT of upper half-bridge brachium pontis
5emitter and the 8th power switch pipe VT of lower half-bridge brachium pontis
8collector electrode be connected, the 6th power switch pipe VT of described neutral-point-clamped brachium pontis
6collector electrode be connected with the mid point flown across electrochemical capacitor 22, the 7th power switch pipe VT
7collector electrode be connected to ac output end
x; Described
xfor A cross streams output a, B cross streams output b, C cross streams output c;
In described high pressure low frequency cell 1, on two level, the mid point of brachium pontis 11 is connected with the positive ends flown across electrochemical capacitor 22 in low-voltage high-frequency unit 2; Under high pressure low frequency cell 1 liang of level, the mid point of brachium pontis 12 is connected with the negative polarity end flown in low-voltage high-frequency unit 2 across electrochemical capacitor 22.
Higher but the device (as GTO, IGCT) that switching frequency is lower of withstand voltage is selected in high pressure low frequency cell, and the very fast but withstand voltage lower device (as IGBT, MOSFET) of low-voltage high-frequency Unit selection switching speed, dc-link capacitance C
1voltage be striding capacitance C
f1the twice of voltage.
Figure 3 shows that based on the stacked hybrid modulation method schematic diagram of multicarrier homophase, under in its mesohigh low frequency cell 1, power switch pipe works in fundamental frequency modulation, wherein power switch pipe VT
1and VT
3conducting simultaneously, VT
2and VT
4conducting simultaneously, and VT
1and VT
4complementary conducting.Under in low-voltage high-frequency unit 2, power switch pipe is operated in multicarrier SPWM pulse-width modulation, wherein power switch pipe VT
5and VT
7complementary conducting, VT
6and VT
8complementary conducting.Work as VT
6conducting, VT
8during shutoff, VT
5and VT
7alternating, complementary conducting; Work as VT
7conducting VT
5during shutoff, VT
6and VT
8alternating, complementary conducting.The modulation wave signal of low-voltage high-frequency unit can be expressed as:
Wherein, m is modulation index (0≤m≤1), and U is the amplitude of carrier signal,
for starting phase angle, S
1ifor the switch function (i=a, b, c) of high pressure low frequency cell power switch pipe.
Table 1 current transformer power switch pipe on off state and corresponding AC output voltage.
Table 1 current transformer power switch pipe on off state and corresponding AC output voltage
| On off state | S 1 | S 2 | S 3 | S 4 | S 5 | S 6 | S 7 | S 8 | AC exports phase voltage |
| 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | -E |
| 2 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | -E/2 |
| 3 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
| 4 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | E/2 |
| 5 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | E |
Wherein: S
nrepresent all VT in three-phase brachium pontis
nstate, 1 for conducting, and 0 for turning off, n=1 ~ 6.
Figure 4 shows that novel hybrid five-level current transformer change of current path, it is positive direction that definition electric current flows to AC from current transformer DC side, and solid line is depicted as current flow circulation path, and dotted line is depicted as NextState current flow paths.Current time power switch pipe VT shown in Fig. 4 (a)
1, VT
3, VT
5and VT
6be in conducting state, AC side of converter output voltage is+E; Subsequent time turns off VT
5, trigger VT
7conducting, output voltage is+E/2 by current transformer, as shown in Table 1, current transformer state by state [5] change of current to state [4].Shown in Fig. 4 (b), current current transformer state is state [4], now triggers VT
8conducting, turns off VT
7, now current transformer is by state [4] change of current to state [3], and current transformer output voltage is 0.Shown in Fig. 4 (c), current current transformer is state [3], now turns off VT
1, VT
3, open VT
2, VT
4, electric current flows through switching tube VT
4, VT
6, VT
7, current transformer output voltage-E/2, current transformer state by state [3] change of current to state [2].Shown in Fig. 4 (d), current current transformer is state [2], now turns off VT
6, open VT
8, current transformer output voltage-E, current transformer by state [2] change of current to state [1].
Figure 5 shows that the linear relationship curve between output AC side phase current fundamental voltage amplitude and modulation index.At modulation index m when scope (0 ~ 1), along with the increase of modulation index, AC phase current fundamental voltage amplitude linearly increases gradually, and when modulation index is greater than 1, phase current fundamental voltage amplitude declines to some extent, and linear characteristic disappears.
Fig. 6-8 is depicted as output voltage under different modulating index and current simulations oscillogram.In order to verify the superperformance of current transformer, under MATLAB/Simulink environment, building the load of three-phase hybrid five-level converter system band resistance sense, having drawn the voltage under three kinds of different modulating indexes, current waveform.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a hybrid five-level current transformer, is characterized in that: comprise three-phase brachium pontis, and every phase brachium pontis is divided into two unit: high pressure low frequency cell (1) and low-voltage high-frequency unit (2);
Described high pressure low frequency cell (1) is made up of brachium pontis (12) under brachium pontis (11), two level on two level and DC bus (13); On described two level, brachium pontis (11) is by the first power switch pipe VT
1emitter and the second power switch pipe VT
2collector electrode be formed by connecting, under described two level, brachium pontis (12) is by the 3rd power switch pipe VT
3emitter and the 4th power switch pipe VT
4collector electrode be formed by connecting, described DC bus (13) is in series by two the first electrochemical capacitors;
Second power switch pipe VT in brachium pontis (11) on described two level
2emitter and two level under the 3rd power switch pipe VT in brachium pontis (12)
3collector electrode be connected, the first power switch pipe VT in brachium pontis (11) on two level
1collector electrode be connected with the positive ends of DC bus (13), the 4th power switch pipe VT in brachium pontis (12) under two level
4emitter be connected with the negative polarity end of DC bus (13);
Described low-voltage high-frequency unit (2) is by the T-shaped brachium pontis of three level (21) and fly to form across electrochemical capacitor (22); The T-shaped brachium pontis of described three level (21) comprises by the 5th power switch pipe VT
5form upper half-bridge brachium pontis, by the 8th power switch pipe VT
8form lower half-bridge brachium pontis and by the 6th power switch pipe VT
6emitter connect the 7th power switch pipe VT
7emitter composition neutral-point-clamped brachium pontis, described in fly to be in series by two the second electrochemical capacitors across electrochemical capacitor (22);
5th power switch pipe VT of upper half-bridge brachium pontis in the T-shaped brachium pontis of described three level (21)
5collector electrode be connected with the positive ends flown across electrochemical capacitor (22), the 8th power switch pipe VT of lower half-bridge brachium pontis in the T-shaped brachium pontis of three level (21)
8emitter be connected with the negative polarity end flown across electrochemical capacitor (22), the 5th power switch pipe VT of upper half-bridge brachium pontis
5emitter and the 8th power switch pipe VT of lower half-bridge brachium pontis
8collector electrode be connected, the 6th power switch pipe VT of described neutral-point-clamped brachium pontis
6collector electrode be connected with the mid point flown across electrochemical capacitor (22), the 7th power switch pipe VT
7collector electrode be connected to ac output end x; Described x is A cross streams output a, B cross streams output b, C cross streams output c;
In described high pressure low frequency cell (1), on two level, the mid point of brachium pontis (11) is connected with the positive ends flown across electrochemical capacitor (22) in low-voltage high-frequency unit (2); Under high pressure low frequency cell (1) two level, the mid point of brachium pontis (12) is connected with the negative polarity end flown across electrochemical capacitor (22) in low-voltage high-frequency unit (2).
2. a kind of hybrid five-level current transformer according to claim 1, is characterized in that: the magnitude of voltage of described first electrochemical capacitor is the twice of the second electrochemical capacitor magnitude of voltage.
3. a kind of hybrid five-level current transformer according to claim 1, is characterized in that: power switch pipes all in described high pressure low frequency cell (1) selects withstand voltage higher but the device that switching frequency is lower; All power switch pipe selector switch speed in described low-voltage high-frequency unit (2) but withstand voltage lower device.
4. a kind of hybrid five-level current transformer according to claim 3, is characterized in that: described withstand voltage is higher but the device that switching frequency is lower is turn-off thyristor GTO, integrated gate commutated thyristor IGCT.
5. a kind of hybrid five-level current transformer according to claim 3, is characterized in that: described switching speed is very fast but withstand voltage lower device is insulated gate bipolar transistor IGBT, metal-oxide half field effect transistor MOSFET.
6. to a control method for the arbitrary described hybrid five-level current transformer of claim 1-5, it is characterized in that, adopt hybrid modulation stratgy, under in high pressure low frequency cell, power switch pipe works in fundamental frequency modulation, wherein, power switch pipe VT
1and VT
3conducting simultaneously, VT
2and VT
4conducting simultaneously, and VT
1and VT
4complementary conducting; Under in low-voltage high-frequency unit, power switch pipe is operated in multicarrier SPWM pulse-width modulation, wherein, power switch pipe VT
5and VT
7complementary conducting, VT
6and VT
8complementary conducting; Work as VT
6conducting, VT
8during shutoff, VT
5and VT
7alternating, complementary conducting; Work as VT
7conducting VT
5during shutoff, VT
6and VT
8alternating, complementary conducting; Table 1 is depicted as current transformer power switch pipe on off state and corresponding AC output voltage;
Table 1 current transformer power switch pipe on off state and corresponding AC output voltage
Wherein: S
nrepresent all VT in three-phase brachium pontis
nstate, 1 for conducting, and 0 for turning off, n=1 ~ 6.
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| CN201610145767.2A CN105577012A (en) | 2016-03-15 | 2016-03-15 | Hybrid five-level current converter and control method thereof |
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|---|---|---|---|
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106059353A (en) * | 2016-07-20 | 2016-10-26 | 合肥工业大学 | Flying capacitor voltage control method for three-phase five-level active neutral-point-clamped converter |
| CN106208396A (en) * | 2016-08-01 | 2016-12-07 | 浙江大学 | A kind of distributing hybrid energy-storing based on MMC topology and electric power compensation system |
| CN107276441A (en) * | 2017-07-18 | 2017-10-20 | 江苏固德威电源科技股份有限公司 | Striding capacitance five-electrical level inverter, phase-shifting control method and grid-connected power generation system |
| CN108418456A (en) * | 2018-04-26 | 2018-08-17 | 佛山科学技术学院 | A kind of four level shifter circuits of double inversion outputs |
| CN108471250A (en) * | 2018-04-27 | 2018-08-31 | 东北大学 | A kind of five level topological structures for power conversion system |
| CN109713724A (en) * | 2019-02-21 | 2019-05-03 | 哈尔滨工业大学 | The zero common-mode voltage space vector modulating method of parallel connection three-level converter suitable for grid-connected application |
| CN110098757A (en) * | 2019-04-24 | 2019-08-06 | 华东交通大学 | A kind of mixed carrier phase shift modulation method of Mixed cascading H bridge multi-electrical level inverter |
| CN110829908A (en) * | 2019-11-26 | 2020-02-21 | 西南交通大学 | Permanent magnet traction motor control method based on hybrid multi-level inverter |
| CN110829872A (en) * | 2019-11-26 | 2020-02-21 | 西南交通大学 | Hybrid multi-level inverter for permanent magnet traction system and control method thereof |
| EP3916987A1 (en) * | 2020-05-29 | 2021-12-01 | Siemens Aktiengesellschaft | Submodule as a hybrid cell for a modular multilevel power converter |
| CN114640265A (en) * | 2022-02-25 | 2022-06-17 | 山东大学 | Multilevel single-phase interphase hybrid topology converter and control method |
| CN115276448A (en) * | 2022-06-16 | 2022-11-01 | 江苏科曜能源科技有限公司 | Novel single-phase T-shaped 17-level energy storage inverter |
| CN115313890A (en) * | 2022-07-14 | 2022-11-08 | 江苏科曜能源科技有限公司 | Single-phase active clamping T-type 17-level inverter |
| CN115864885A (en) * | 2023-02-20 | 2023-03-28 | 湖南大学 | Hybrid modular multilevel converter topological structure and regulating and controlling method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012253981A (en) * | 2011-06-07 | 2012-12-20 | Fuji Electric Co Ltd | Five-level conversion circuit |
| CN103595281A (en) * | 2013-10-09 | 2014-02-19 | 徐州中矿大传动与自动化有限公司 | Five-level voltage source type conversion device |
-
2016
- 2016-03-15 CN CN201610145767.2A patent/CN105577012A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012253981A (en) * | 2011-06-07 | 2012-12-20 | Fuji Electric Co Ltd | Five-level conversion circuit |
| CN103595281A (en) * | 2013-10-09 | 2014-02-19 | 徐州中矿大传动与自动化有限公司 | Five-level voltage source type conversion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106059353B (en) * | 2016-07-20 | 2018-07-27 | 合肥工业大学 | The striding capacitance voltage control method of three-phase five-level active neutral point clamp inverter |
| CN106059353A (en) * | 2016-07-20 | 2016-10-26 | 合肥工业大学 | Flying capacitor voltage control method for three-phase five-level active neutral-point-clamped converter |
| CN106208396A (en) * | 2016-08-01 | 2016-12-07 | 浙江大学 | A kind of distributing hybrid energy-storing based on MMC topology and electric power compensation system |
| CN106208396B (en) * | 2016-08-01 | 2019-05-31 | 浙江大学 | A kind of distributing hybrid energy-storing based on MMC topology and electric power compensation system |
| CN107276441A (en) * | 2017-07-18 | 2017-10-20 | 江苏固德威电源科技股份有限公司 | Striding capacitance five-electrical level inverter, phase-shifting control method and grid-connected power generation system |
| CN107276441B (en) * | 2017-07-18 | 2024-04-09 | 固德威技术股份有限公司 | Flying capacitor five-level inverter, phase shift control method and new energy power generation system |
| CN108418456A (en) * | 2018-04-26 | 2018-08-17 | 佛山科学技术学院 | A kind of four level shifter circuits of double inversion outputs |
| CN108471250A (en) * | 2018-04-27 | 2018-08-31 | 东北大学 | A kind of five level topological structures for power conversion system |
| CN109713724B (en) * | 2019-02-21 | 2022-06-07 | 哈尔滨工业大学 | Zero common-mode voltage space vector modulation method suitable for parallel three-level converter in photovoltaic grid-connected application |
| CN109713724A (en) * | 2019-02-21 | 2019-05-03 | 哈尔滨工业大学 | The zero common-mode voltage space vector modulating method of parallel connection three-level converter suitable for grid-connected application |
| CN110098757A (en) * | 2019-04-24 | 2019-08-06 | 华东交通大学 | A kind of mixed carrier phase shift modulation method of Mixed cascading H bridge multi-electrical level inverter |
| CN110829872A (en) * | 2019-11-26 | 2020-02-21 | 西南交通大学 | Hybrid multi-level inverter for permanent magnet traction system and control method thereof |
| CN110829908B (en) * | 2019-11-26 | 2021-06-29 | 西南交通大学 | Permanent magnet traction motor control method based on hybrid multi-level inverter |
| CN110829872B (en) * | 2019-11-26 | 2024-03-19 | 西南交通大学 | Hybrid multi-level inverter for permanent magnet traction system and control method thereof |
| CN110829908A (en) * | 2019-11-26 | 2020-02-21 | 西南交通大学 | Permanent magnet traction motor control method based on hybrid multi-level inverter |
| EP3916987A1 (en) * | 2020-05-29 | 2021-12-01 | Siemens Aktiengesellschaft | Submodule as a hybrid cell for a modular multilevel power converter |
| WO2021239387A1 (en) * | 2020-05-29 | 2021-12-02 | Siemens Aktiengesellschaft | Submodule as a hybrid cell for a modular multilevel converter |
| CN114640265A (en) * | 2022-02-25 | 2022-06-17 | 山东大学 | Multilevel single-phase interphase hybrid topology converter and control method |
| CN115276448A (en) * | 2022-06-16 | 2022-11-01 | 江苏科曜能源科技有限公司 | Novel single-phase T-shaped 17-level energy storage inverter |
| CN115313890A (en) * | 2022-07-14 | 2022-11-08 | 江苏科曜能源科技有限公司 | Single-phase active clamping T-type 17-level inverter |
| CN115864885A (en) * | 2023-02-20 | 2023-03-28 | 湖南大学 | Hybrid modular multilevel converter topological structure and regulating and controlling method thereof |
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