CN103840474B - A kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure - Google Patents
A kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure Download PDFInfo
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- CN103840474B CN103840474B CN201410075640.9A CN201410075640A CN103840474B CN 103840474 B CN103840474 B CN 103840474B CN 201410075640 A CN201410075640 A CN 201410075640A CN 103840474 B CN103840474 B CN 103840474B
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Abstract
The invention provides a kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure, comprise single-phase translation circuit, common DC bus circuit, converter reactor and start-up circuit; Single-phase translation circuit and common DC bus circuit in parallel, after in parallel, output connects converter reactor, and converter reactor is by start-up circuit incoming transport electrical network.The present invention can realize reactive voltage and support, the functions such as harmonic pollution improvement and damping of power oscillation, can direct screening mesohigh AC network, output waveform quality is good, switch motion frequency is low, required switching device quantity is relatively less, direct voltage utilance is high and can suppress the features such as DC side fault current, wave filter on AC side quantity can be reduced, reduce the early investment cost of compensator and control complexity, improve the energy conversion efficiency of reactive-load compensator, improve the failure-survival capability of reactive-load compensator, promote the specific utilization coefficient of reactive-load compensator and expand application scenario and the effect of reactive-load compensator.
Description
Technical field
The present invention relates to a kind of topological structure, specifically relate to a kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure.
Background technology
Reactive power compensation is significant for AC electric power systems, and the balance of reactive power directly affects the safe, stable of electric power system and economical operation.Suitable reactive power compensation can solve electric power system under different operational mode due to the problem such as overvoltage and system stability that idle deficiency and idle surplus are brought.
Fixed reactive power compensator and phase control-type dynamic reactive compensation device develop two kinds of the most ripe Reactive Compensation Modes at present stage, but due to current system high speed railway, the introducing of a large amount of nonlinear-load and active load, system load flow acute variation, require that System Reactive Power response is rapider, and possess good harmonic filtering function, the conventional fixing Reactive Compensation Mode based on capacitor or reactor switching is not good enough owing to there is the reactive power compensation linearity, and likely cause the problems such as system harmonics amplification and overvoltage, current idle rapid response and AC system dynamic stability operation demand cannot be met.
STATCOM (STATCOM) based on voltage source commutation is a kind of new device simultaneously possessing reactive power compensation and harmonics restraint developed rapidly in recent years, this compensator is quite ripe abroad, but also do not realize the breakthrough of key technology at home, mainly be applied in the converter topology technology in mesohigh field, the STATCOM main circuit topology that present stage has realized through engineering approaches is generally the design with Industrial Frequency Transformer, and which exists that equipment investment is large, occupations of land is many, cost is high and the production cycle such as to grow at the problem.There is a kind of topological structure based on cascade connection multi-level in addition, this structure exist device investment large, control the problems such as relatively complicated, and applied voltage lower grade at present, is generally 10kV and following.
Present stage is due to the injection of extensive new forms of energy electric power, fluctuation and the randomness of power are stronger, system reserve reactive capability is not enough, power quality problem and system voltage stabilizes problem are extended to interchange transmission network gradually, have a strong impact on the stable operation of Iarge-scale system, even likely cause the high-low voltage off-grid accident of extensive new energy power station.Therefore the main circuit topology problem being applied to the quick dynamic synchronization reactive-load compensator of Large Copacity in mesohigh field is especially aobvious outstanding.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure, this reactive-load compensator is compared with traditional reactive-load compensator, not only can realize reactive voltage to support, the functions such as harmonic pollution improvement and damping of power oscillation, and without the need to input transformer, can direct screening mesohigh AC network, output waveform quality is good, switch motion frequency is low, required switching device quantity is relatively less, direct voltage utilance is high and can suppress the features such as DC side fault current, wave filter on AC side quantity can be reduced, reduce the early investment cost of compensator, reduce the control complexity of compensator, improve the energy conversion efficiency of reactive-load compensator, improve the failure-survival capability of reactive-load compensator, promote the specific utilization coefficient of reactive-load compensator and expand application scenario and the effect of reactive-load compensator.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure, described topological structure comprises single-phase translation circuit, common DC bus circuit, converter reactor and start-up circuit; Described single-phase translation circuit and common DC bus circuit in parallel, after in parallel, output connects converter reactor, and converter reactor is by start-up circuit incoming transport electrical network.
Described single-phase translation circuit comprises A phase inversion circuit, B phase inversion circuit and C phase inversion circuit; Described A phase inversion circuit, B phase inversion circuit and C phase inversion circuit include brachium pontis and lower brachium pontis.
Described upper brachium pontis and lower brachium pontis include the wave generator circuit, loop current suppression reactor and the switching switch circuit that are connected successively.
Upper brachium pontis in A phase inversion circuit, B phase inversion circuit and C phase inversion circuit and lower brachium pontis symmetrical, wave generator circuit one end of upper brachium pontis connects, form common DC bus positive pole, waveform Power Generation Road one end of lower brachium pontis connects, form common DC bus negative pole, the other end of the wave generator circuit of up/down brachium pontis connects loop current suppression reactor, and the other end of loop current suppression reactor connects switching switch circuit, and the other end of switching switch circuit connects converter reactor.
The wave generator circuit of described upper brachium pontis works in positive half period, and the wave generator circuit of lower brachium pontis works in negative half-cycle, and the wave generator circuit of up/down brachium pontis all adopts sinusoidal wave as modulating wave;
Described wave generator circuit is in series by the power model of N number of identical or different standard, and exporting phase voltage level step number is 2N+1, and the head and end of power model is respectively input and the output of wave generator circuit;
The level ladder that described power model exports comprises positive level, negative level and zero level, the level ladder that the power model output amplitude of various criterion is identical or different.
Described power model comprises IGBT
1, IGBT
2, IGBT
3, IGBT
4with DC bus capacitor device C; Described IGBT
1with IGBT
2, IGBT
3with IGBT
4respectively after series connection, more in parallel with DC bus capacitor device C respectively, described IGBT
1with IGBT
2common port and IGBT
3with IGBT
4common port be respectively input or the output of this power model;
Described IGBT
1, IGBT
2, IGBT
3and GBT
4include switching device and diode, switching device and diode inverse parallel.
Described power model comprises IGBT
1, IGBT
2, IGBT
3, IGBT
4, IGBT
5, DC bus capacitor device C
1, DC bus capacitor device C
2, diode D
1with diode D
2; Described IGBT
1with IGBT
2connect rear and DC bus capacitor device C
1parallel connection, DC bus capacitor device C
1one end and diode D
1one end is connected, and this tie point is power model DC bus positive pole 1, DC bus capacitor device C
1the other end be DC bus negative pole 1; Described IGBT
3with IGBT
4connect rear and DC bus capacitor device C
2parallel connection, DC bus capacitor device C
2one end and diode D
2one end is connected, and this tie point is power model DC bus negative pole 2, DC bus capacitor device C
2the other end be DC bus positive pole 2; Diode D
1the other end be connected with DC bus positive pole 2; Diode D
2the other end is connected with DC bus negative pole 2; IGBT
5one end connect DC bus positive pole 2, its other end connects DC bus negative pole 2; Described IGBT
1with IGBT
2common port and IGBT
3with IGBT
4common port be respectively input or the output of this power model.
Described loop current suppression reactor for suppressing the circulation amplitude between upper and lower bridge arm, and participates in power model voltage balance control, and can by the conversion of converter reactor reactance value to loop current suppression reactor reactance value.
Described switching switch circuit is composed in series by IGBT, and IGBT comprises switching device and diode antiparallel with it, and the gate electrode drive signals of switching device is consistent;
Described switching switch circuit works in low frequency operation state, and switching frequency is 2 times of frequency of modulated wave; When modulating wave is in positive half period operating state, the switching switch circuit of upper brachium pontis is in conducting state; When modulating wave is in negative semiduation operating state, the switching switch circuit of lower brachium pontis is in conducting state.
Described common DC bus circuit is composed in series by Capacitor banks; Wherein Capacitor banks is composed in parallel by monolithic capacitor, and each monolithic capacitor divider resistance in parallel, to ensure that capacitor monomer divides equally DC bus-bar voltage.
Described start-up circuit comprises A phase start-up circuit, B phase start-up circuit and C phase start-up circuit, and described A phase start-up circuit, B phase start-up circuit and C phase start-up circuit include charging resistor and by-pass switch, described charging resistor and by-pass switch parallel connection.
Described A phase start-up circuit, B phase start-up circuit and C phase start-up circuit are respectively by alternating-current switch QF
1, QF
2and QF
3incoming transport electrical network.
Compared with prior art, beneficial effect of the present invention is:
(1) there is the Static Var Compensator of this main circuit topological structure without the need to input transformer, can direct screening mesohigh AC network, the production cycle of compensator is shortened, volume and floor space reduces, cost reduces, designs simplification and convenient transportation, be convenient to be assembled into packaged type compensator.
(2) the Static Var Compensator output waveform quality with this main circuit topological structure is good, the output of compensator is made substantially not need low-order harmonic filter, while the output performance of compensator is got a promotion, compensator overall volume reduces, overall cost reduces, and reduce the negative effect of system, electromagnetic interference is also little.
(3) the Static Var Compensator switching device with this main circuit topological structure is relatively less, and switch motion frequency is low, and the energy conversion efficiency of compensator is got a promotion, and year loss declines, and economy is promoted.
(4) the Static Var Compensator direct voltage utilance with this main circuit topological structure is high, makes the output voltage of compensator can adapt to the wide region variation demand of electrical network, promotes the grid adaptability of compensator.
(5) Static Var Compensator with this main circuit topological structure can suppress DC side fault current, the switching device maximum voltage of compensator, current stress is declined, saves device cost, improve device survival ability.
Accompanying drawing explanation
Fig. 1 is mesohigh direct hanging type Static Var Compensator main circuit topological structure schematic diagram;
Fig. 2 is power module architectures schematic diagram in a kind of wave generator circuit in the embodiment of the present invention;
Fig. 3 is power module architectures schematic diagram in another kind of wave generator circuit in the embodiment of the present invention;
Fig. 4 is switching switch circuit topology schematic diagram in the embodiment of the present invention;
Fig. 5 is Static Var Compensator operation principle schematic diagram in the embodiment of the present invention;
Fig. 6 is circulation reactor design principle schematic in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The invention provides a kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure, described topological structure comprises single-phase translation circuit, common DC bus circuit, converter reactor and start-up circuit; Described single-phase translation circuit and common DC bus circuit in parallel, after in parallel, output connects converter reactor, and converter reactor is by start-up circuit incoming transport electrical network.
Described single-phase translation circuit comprises A phase inversion circuit, B phase inversion circuit and C phase inversion circuit; Described A phase inversion circuit, B phase inversion circuit and C phase inversion circuit include brachium pontis and lower brachium pontis.
Described upper brachium pontis and lower brachium pontis include the wave generator circuit, loop current suppression reactor and the switching switch circuit that are connected successively.
Upper brachium pontis in A phase inversion circuit, B phase inversion circuit and C phase inversion circuit and lower brachium pontis symmetrical, wave generator circuit one end of upper brachium pontis connects, form common DC bus positive pole, waveform Power Generation Road one end of lower brachium pontis connects, form common DC bus negative pole, the other end of the wave generator circuit of up/down brachium pontis connects loop current suppression reactor, and the other end of loop current suppression reactor connects switching switch circuit, and the other end of switching switch circuit connects converter reactor.
The wave generator circuit of described upper brachium pontis works in positive half period, and the wave generator circuit of lower brachium pontis works in negative half-cycle, and the wave generator circuit of up/down brachium pontis all adopts sinusoidal wave as modulating wave;
Described wave generator circuit is in series by the power model of N number of identical or different standard, and exporting phase voltage level step number is 2N+1, and the head and end of power model is respectively input and the output of wave generator circuit;
The level ladder that described power model exports comprises positive level, negative level and zero level, the level ladder that the power model output amplitude of various criterion is identical or different.
Described power model comprises IGBT
1, IGBT
2, IGBT
3, IGBT
4with DC bus capacitor device C; Described IGBT
1with IGBT
2, IGBT
3with IGBT
4respectively after series connection, more in parallel with DC bus capacitor device C respectively, described IGBT
1with IGBT
2common port and IGBT
3with IGBT
4common port be respectively input or the output of this power model;
Described IGBT
1, IGBT
2, IGBT
3and GBT
4include switching device and diode, switching device and diode inverse parallel.
Described power model comprises IGBT
1, IGBT
2, IGBT
3, IGBT
4, IGBT
5, DC bus capacitor device C
1, DC bus capacitor device C
2, diode D
1with diode D
2; Described IGBT
1with IGBT
2connect rear and DC bus capacitor device C
1parallel connection, DC bus capacitor device C
1one end and diode D
1one end is connected, and this tie point is power model DC bus positive pole 1, DC bus capacitor device C
1the other end be DC bus negative pole 1; Described IGBT
3with IGBT
4connect rear and DC bus capacitor device C
2parallel connection, DC bus capacitor device C
2one end and diode D
2one end is connected, and this tie point is power model DC bus negative pole 2, DC bus capacitor device C
2the other end be DC bus positive pole 2; Diode D
1the other end be connected with DC bus positive pole 2; Diode D
2the other end is connected with DC bus negative pole 2; IGBT
5one end connect DC bus positive pole 2, its other end connects DC bus negative pole 2; Described IGBT
1with IGBT
2common port and IGBT
3with IGBT
4common port be respectively input or the output of this power model.
Described loop current suppression reactor for suppressing the circulation amplitude between upper and lower bridge arm, and participates in power model voltage balance control, and can by the conversion of converter reactor reactance value to loop current suppression reactor reactance value.
Described switching switch circuit is composed in series by IGBT, and IGBT comprises switching device and diode antiparallel with it, and the gate electrode drive signals of switching device is consistent;
Described switching switch circuit works in low frequency operation state, and switching frequency is 2 times of frequency of modulated wave; When modulating wave is in positive half period operating state, the switching switch circuit of upper brachium pontis is in conducting state; When modulating wave is in negative semiduation operating state, the switching switch circuit of lower brachium pontis is in conducting state.
Described common DC bus circuit is composed in series by Capacitor banks; Wherein Capacitor banks is composed in parallel by monolithic capacitor, and each monolithic capacitor divider resistance in parallel, to ensure that capacitor monomer divides equally DC bus-bar voltage.
Described start-up circuit comprises A phase start-up circuit, B phase start-up circuit and C phase start-up circuit, and described A phase start-up circuit, B phase start-up circuit and C phase start-up circuit include charging resistor and by-pass switch, described charging resistor and by-pass switch parallel connection.
Described A phase start-up circuit, B phase start-up circuit and C phase start-up circuit are respectively by alternating-current switch QF
1, QF
2and QF
3incoming transport electrical network.
This main circuit topological structure does not need to seal in traditional Industrial Frequency Transformer, and possesses the advantage of two level topological structures, reaches the object reducing costs, save space, reduce control complexity and improving performance.
The Static Var Compensator with this main circuit topological structure directly can access median and high voltage power system, and having that output waveform quality is good, low, the required switching device quantity of switch motion frequency is relatively less, direct voltage utilance is high and can suppress the features such as DC side fault current, the commercial applications that can be the large-capacity dynamic reactive power compensating device in mesohigh field provides Technical Reference.
Embodiment
As Fig. 1, mesohigh direct hanging type Static Var Compensator main circuit topological structure is made up of 3 single-phase translation circuits, and each single-phase translation circuit is made up of upper and lower brachium pontis, and each brachium pontis is made up of wave generator circuit, loop current suppression reactor and switching switch circuit.In upper brachium pontis, one end of wave generator circuit links together, and forms common DC bus positive pole, the other end and loop current suppression reactor L
a1, L
b1, L
c1connect; Loop current suppression reactor L
a1, L
b1, L
c1the other end and diverter switch S
a1, S
b1, S
c1connect.In single-phase translation circuit, upper and lower bridge arm topological structure is symmetric, and wave generator circuit, loop current suppression reactance genial switching switch circuit connected mode are identical, and define common DC bus negative pole.Therefore brachium pontis loop current suppression reactor L is gone up
a1, L
b1, L
c1the other end and lower brachium pontis loop current suppression reactor L
a2, L
b2, L
c2the other end be connected, then input reactance device L
a, L
b, L
cone end be connected, the input reactance device other end connect charging resistor RF
1, charging resistor RF
1paralleling switch QF
2after, then by another switch QF
1incoming transport electrical network.
Wave generator circuit is in series by the power model of identical or different standard, sees Fig. 2 or Fig. 3, two kinds of calibration power modular unit topological structures.Illustrate for Fig. 2, calibration power module comprises: 4 switching device S
1, S
2, S
3, S
4, 4 diode D
1, D
2, D
3, D
4form with DC bus capacitor device C.Switching device S
1, S
2, S
3, S
4with diode D
1, D
2, D
3, D
4in parallel respectively, switching device S
1, S
2and S
3, S
4in parallel again after being in series respectively, then be in parallel with DC bus capacitor device C, switching device S
1, S
2common port be this power model input or output port, switching device S
1, S
2common port be that another of this power model inputs or outputs port.This common port is connected with the end that inputs or outputs of other power cells again, forms wave generator circuit.
Fig. 4 is switching switch circuit topological structure, by N number of switching device S
1, S
2, S
3to S
n, N number of diode D
1, D
2, D
3to D
ncomposition.Switching device S
1, S
2, S
3to S
nwith diode D
1, D
2, D
3to D
nconnect again after parallel connection respectively, switching device S
1current collection very switching switch circuit input or output port, switching device S
nanother of transmitting very switching switch circuit input or output port.
Fig. 5, the basic functional principle schematic diagram of this main circuit topological structure, by the control of the turn-on and turn-off to wave generator circuit and switching switch circuit breaker in middle device, realize the control of the compensation to power system reactive power, direct voltage, to improve electric power quality.When modulating wave is in positive half cycle, by Sine Modulated, and there is direct current biasing in upper brachium pontis wave generator circuit, upper brachium pontis switching switch circuit is in conducting state; Lower brachium pontis wave generator circuit exports half DC bus-bar voltage, and lower brachium pontis switching switch circuit is in off state.When modulating wave is in negative half period, upper brachium pontis wave generator circuit exports half DC bus-bar voltage, and upper brachium pontis switching switch circuit is in off state; By Sine Modulated, and there is direct current biasing in lower brachium pontis wave generator circuit, lower brachium pontis switching switch circuit is in conducting state.
Fig. 6 is loop current suppression reactor design principle, and when compensator steady operation, there are two current circuits as shown in the figure, loop 1 comprises DC bus-bar voltage U
dc, upper and lower bridge arm wave generator circuit output voltage U
ap, U
anwith loop current suppression reactor transient voltage U
ldeng, and between three, there is certain mathematical relationship; Loop 2 comprises half DC bus-bar voltage U
dc/ 2, lower brachium pontis wave generator circuit output voltage U
ap, U
anwith loop current suppression reactor transient voltage U
ldeng, and between three, there is certain mathematical relationship.Above-mentioned mathematical relationship is carried out arrangement known, the size of loop current suppression reactor is relevant with input AC side phase voltage peak value with brachium pontis transient current climbing.
This topological structure takes full advantage of the feature that the good and two level topology Semiconductor Converting Technologies of modular multilevel Semiconductor Converting Technology output waveform quality control the aspect such as simple, eliminate Industrial Frequency Transformer, save cost of investment and floor space, improve economy and the applicability of device.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. a mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure, is characterized in that: described topological structure comprises single-phase translation circuit, common DC bus circuit, converter reactor and start-up circuit; Described single-phase translation circuit and common DC bus circuit in parallel, after in parallel, output connects converter reactor, and converter reactor is by start-up circuit incoming transport electrical network;
Described single-phase translation circuit comprises A phase inversion circuit, B phase inversion circuit and C phase inversion circuit; Described A phase inversion circuit, B phase inversion circuit and C phase inversion circuit include brachium pontis and lower brachium pontis;
Described upper brachium pontis and lower brachium pontis include the wave generator circuit, loop current suppression reactor and the switching switch circuit that are connected successively;
Upper brachium pontis in A phase inversion circuit, B phase inversion circuit and C phase inversion circuit and lower brachium pontis symmetrical, wave generator circuit one end of upper brachium pontis connects common DC bus positive pole, wave generator circuit one end of lower brachium pontis connects common DC bus negative pole, the other end of the wave generator circuit of up/down brachium pontis connects loop current suppression reactor, the other end of loop current suppression reactor connects switching switch circuit, and the other end of switching switch circuit connects converter reactor;
The wave generator circuit of described upper brachium pontis works in positive half period, and the wave generator circuit of lower brachium pontis works in negative half-cycle, and the wave generator circuit of up/down brachium pontis all adopts sinusoidal wave as modulating wave;
Described wave generator circuit is in series by the power model of N number of identical or different standard, and exporting phase voltage level step number is 2N+1, and the head and end of the power model of N number of series connection is respectively input and the output of wave generator circuit;
The level ladder that described power model exports comprises positive level, negative level and zero level, the level ladder that the power model output amplitude of various criterion is identical or different;
Described power model comprises IGBT
1, IGBT
2, IGBT
3, IGBT
4, IGBT
5, DC bus capacitor device C
1, DC bus capacitor device C
2, diode D
1with diode D
2; Described IGBT
1with IGBT
2connect rear and DC bus capacitor device C
1parallel connection, DC bus capacitor device C
1one end and diode D
1one end is connected, and this tie point is power model DC bus positive pole 1, DC bus capacitor device C
1the other end be DC bus negative pole 1; Described IGBT
3with IGBT
4connect rear and DC bus capacitor device C
2parallel connection, DC bus capacitor device C
2one end and diode D
2one end is connected, and this tie point is power model DC bus negative pole 2, DC bus capacitor device C
2the other end be DC bus positive pole 2; Diode D
1the other end be connected with DC bus positive pole 2; Diode D
2the other end is connected with DC bus negative pole 1; IGBT
5one end connect DC bus positive pole 2, its other end connects DC bus negative pole 1; Described IGBT
1with IGBT
2common port and IGBT
3with IGBT
4common port be respectively input or the output of this power model.
2. mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure according to claim 1, is characterized in that: described power model comprises IGBT
6, IGBT
7, IGBT
8, IGBT
9with DC bus capacitor device C; Described IGBT
6with IGBT
7, IGBT
8with IGBT
9respectively after series connection, more in parallel with DC bus capacitor device C respectively, described IGBT
6with IGBT
7common port and IGBT
8with IGBT
9common port be respectively input or the output of this power model;
Described IGBT
6, IGBT
7, IGBT
8and IGBT
9include switching device and diode, switching device and diode inverse parallel.
3. mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure according to claim 1, it is characterized in that: described loop current suppression reactor is for suppressing the circulation amplitude between upper and lower bridge arm, and participate in power model voltage balance control, and can by the conversion of converter reactor reactance value to loop current suppression reactor reactance value.
4. mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure according to claim 1, it is characterized in that: described switching switch circuit is composed in series by IGBT, IGBT comprises switching device and diode antiparallel with it, and the gate electrode drive signals of switching device is consistent;
Described switching switch circuit works in low frequency operation state, and switching frequency is 2 times of frequency of modulated wave; When modulating wave is in positive half period operating state, the switching switch circuit of upper brachium pontis is in conducting state; When modulating wave is in negative half-cycle operating state, the switching switch circuit of lower brachium pontis is in conducting state.
5. mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure according to claim 1, is characterized in that: described common DC bus circuit is composed in series by Capacitor banks; Wherein Capacitor banks is composed in parallel by monolithic capacitor, and each monolithic capacitor divider resistance in parallel, to ensure that capacitor monomer divides equally DC bus-bar voltage.
6. mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure according to claim 1, it is characterized in that: described start-up circuit comprises A phase start-up circuit, B phase start-up circuit and C phase start-up circuit, described A phase start-up circuit, B phase start-up circuit and C phase start-up circuit include charging resistor and by-pass switch, described charging resistor and by-pass switch parallel connection.
7. mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure according to claim 6, is characterized in that: described A phase start-up circuit, B phase start-up circuit and C phase start-up circuit are respectively by alternating-current switch QF
1, QF
2and QF
3incoming transport electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410075640.9A CN103840474B (en) | 2014-03-04 | 2014-03-04 | A kind of mesohigh direct hanging type Static Synchronous reactive-load compensator main circuit topological structure |
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| CN105048465A (en) * | 2015-08-12 | 2015-11-11 | 广东明阳龙源电力电子有限公司 | Cascaded H bridge STATCOM-based reactive power compensation and filtering device |
| CN107910886B (en) * | 2017-12-12 | 2024-01-12 | 荣信汇科电气股份有限公司 | Submodule topological structure and method for flexible direct-current transmission converter valve |
| CN108512432B (en) * | 2018-06-08 | 2024-02-27 | 特变电工新疆新能源股份有限公司 | Power electronic transformer with function of blocking bidirectional fault current |
| CN112994133A (en) * | 2019-12-17 | 2021-06-18 | 西安西电高压开关有限责任公司 | Energy storage battery interface device |
| CN111884230B (en) * | 2020-07-02 | 2022-02-22 | 南方电网科学研究院有限责任公司 | Method and device for reducing bus voltage fluctuation in switching process of alternating current filter bank |
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| 基于模块化多电平换流器的STATCOM研究;朱劲松;《中国优秀硕士学位论文全文数据库》;20131231;正文第5-50页，图1.4、图1.5、图3.1 * |
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