CN204391753U - A kind of phase three-wire three dynamic voltage compensator in series type - Google Patents
A kind of phase three-wire three dynamic voltage compensator in series type Download PDFInfo
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- CN204391753U CN204391753U CN201420806970.6U CN201420806970U CN204391753U CN 204391753 U CN204391753 U CN 204391753U CN 201420806970 U CN201420806970 U CN 201420806970U CN 204391753 U CN204391753 U CN 204391753U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model relates to a kind of phase three-wire three dynamic voltage compensator in series type, belongs to field of electric automatization equipment.The ac input end of A phase compensating circuit wherein receives the first input end of autotransformer, one end of first inspection switch and one end of auto by pass switch, second input of autotransformer receives the ac input end of B phase compensating circuit, its output receives the input of this commutating phase inversion filter circuit, first output of commutation inversion filter circuit receives the other end and this phase inverse parallel bypass silicon controlled one end of this phase first inspection switch, its second output receives one end of this phase second inspection switch and the other end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of A phase compensating circuit.The utility model, under the dynamic electric voltage needed for realizing falls the prerequisite of compensation, cancels rectification side isolating transformer, reduces the holistic cost of compensator.
Description
Technical field
The utility model relates to a kind of phase three-wire three dynamic voltage compensator in series type, belongs to field of electric automatization equipment.
Background technology
Dynamic voltage compensator (or claim dynamic electric voltage recovery device, DVR), for to fall or the line voltage of overshoot compensates fast, makes the voltage of load side keep stable, is not subject to the impact of electrical network electric voltage exception.
Dynamic voltage compensator can adopt series connection compensation way in the line, also can adopt compensation way on the line in parallel.Under the dynamic voltage compensation prerequisite required for realizing, dynamic voltage compensator should reduce costs as much as possible.Traditional dynamic voltage compensator in series type is not when inversion outlet side isolates access of directly connecting by compensated line, rectification side needs to adopt isolating transformer to provide DC power supply for inverter DC capacitor, make cost higher, therefore need to find new circuit topology and reduce costs further.
Summary of the invention
The purpose of this utility model proposes a kind of phase three-wire three dynamic voltage compensator in series type, to overcome the deficiency of prior art, under the dynamic voltage compensation function prerequisite required for realizing, cancels the isolating transformer of rectification side, reduce the holistic cost of compensator.
The phase three-wire three dynamic voltage compensator in series type that the utility model proposes, comprise A phase compensating circuit, B phase compensating circuit and C phase compensating circuit, every phase compensating circuit comprises an autotransformer, a commutation inversion filter circuit, inverse parallel bypass Group of Silicon Controlled Rectifier, the first inspection switch, the second inspection switch and an auto by pass switch;
The ac input end of A phase compensating circuit is connected to the first input end of this phase autotransformer simultaneously, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of B phase compensating circuit, the output of this phase autotransformer is connected to the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit is connected to the other end of this phase first inspection switch and one end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, second output of this commutating phase inversion filter circuit receives one end of this phase second inspection switch and the other end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of A phase compensating circuit,
The ac input end of B phase compensating circuit is connected to the first input end of this phase autotransformer simultaneously, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of C phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end of this phase first inspection switch and one end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of B phase compensating circuit,
The ac input end of C phase compensating circuit receives the first input end of this phase autotransformer simultaneously, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of A phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end of this phase first inspection switch and one end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of C phase compensating circuit.
In above-mentioned phase three-wire three dynamic voltage compensator in series type, described commutation inversion filter circuit, comprise the first rectifier diode, second rectifier diode, first accumulator, the second accumulator, a voltage source half-bridge inversion circuit, first filter inductance, the second filter inductance and a resistance and capacitances in series filter branch; the anode of the first described rectifier diode and the negative electrode of the second described rectifier diode link together as the input of described commutation inversion filter circuit, the negative electrode of the first described rectifier diode receives the positive terminal of the first described accumulator and the positive terminal of described voltage source half-bridge inversion circuit simultaneously, the anode of the second described rectifier diode receives the negative pole end of the second described accumulator and the negative pole end of described voltage source half-bridge inversion circuit simultaneously, the negative pole end of the first described accumulator connects together with the positive terminal of the second described accumulator, and be connected to the described input of voltage source half-bridge inversion circuit electric capacity brachium pontis and one end of the first described filter inductance simultaneously, the input of the semiconductor switch brachium pontis of described voltage source half-bridge inversion circuit is connected to one end of the second described filter inductance, the other end of the first described filter inductance is connected to one end of described resistance and capacitances in series filter branch, and as described commutation inversion filter circuit first output, the other end of the second described filter inductance is connected to the other end of described resistance and capacitances in series filter branch, and as described commutation inversion filter circuit second output.
The voltage source half-bridge inversion circuit of above-mentioned commutation inversion filter circuit, by the first electric capacity, second electric capacity, the semiconductor switch of the first band anti-paralleled diode and the semiconductor switch composition of the second band anti-paralleled diode, one end of the first described electric capacity connects together the positive terminal as described voltage source half-bridge inversion circuit with the semiconductor switch collector electrode of the described first band anti-paralleled diode, one end of the second described electric capacity connects together the negative pole end as described voltage source half-bridge inversion circuit with the semiconductor switch emitter of the described second band anti-paralleled diode, the other end of the other end of first described electric capacity and described second electric capacity links together as the input of described voltage source half-bridge inversion circuit electric capacity brachium pontis, the semiconductor switch emitter of the first described band anti-paralleled diode connects together the input as described voltage source half-bridge inversion circuit semiconductor switch brachium pontis with the semiconductor switch collector electrode of the described second band anti-paralleled diode.
The advantage of the phase three-wire three dynamic voltage compensator in series type that the utility model proposes is:
When inverter side directly accesses by compensated line, rectification side does not need to use isolating transformer yet, adds the application of accumulator, the volume of device and cost can be made to reduce significantly, and compensation performance is unaffected, can improve the competitiveness of product.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of phase three-wire three dynamic voltage compensator in series type of the present utility model.
Fig. 2 is the circuit theory diagrams of commutation inversion filter circuit in the phase three-wire three dynamic voltage compensator in series type shown in Fig. 1.
In Fig. 1 and Fig. 2,1 is autotransformer, and 2 is commutation inversion filter circuits, 3 is inverse parallel bypass Group of Silicon Controlled Rectifier, and 4 is first inspection switch, and 5 is second inspection switch, 6 is auto by pass switches, and 7 is first rectifier diodes, and 8 is second rectifier diodes, 9 is first accumulators, 10 is second accumulators, and 11 is voltage source half-bridge inversion circuits, and 12 is first filter inductances, 13 is second filter inductances, and 14 is resistance and capacitances in series filter branch.
Embodiment
The phase three-wire three dynamic voltage compensator in series type that the utility model proposes, comprise A phase compensating circuit, B phase compensating circuit, C phase compensating circuit, every phase compensating circuit comprises an autotransformer, a commutation inversion filter circuit, an inverse parallel bypass controllable silicon, first inspection switch, the second inspection switch and an auto by pass switch, and comprise three ac input ends A, B, C and three ac output ends U, V, W;
The ac input end of A phase compensating circuit receives the first input end of this phase autotransformer, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of B phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end and this phase inverse parallel bypass silicon controlled one end of this phase first inspection switch, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of A phase compensating circuit, the ac input end of B phase compensating circuit receives the first input end of this phase autotransformer, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of C phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end and this phase inverse parallel bypass silicon controlled one end of this phase first inspection switch, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of B phase compensating circuit, the ac input end of C phase compensating circuit receives the first input end of this phase autotransformer, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of A phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end and this phase inverse parallel bypass silicon controlled one end of this phase first inspection switch, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of C phase compensating circuit.
In above-mentioned phase three-wire three dynamic voltage compensator in series type, described commutation inversion filter circuit, comprise the first rectifier diode, second rectifier diode, first accumulator, the second accumulator, a voltage source half-bridge inversion circuit, first filter inductance, the second filter inductance and a resistance and capacitances in series filter branch.The anode of the first described rectifier diode and the negative electrode of the second described rectifier diode link together as the input of described commutation inversion filter circuit, the negative electrode of the first described rectifier diode receives the positive terminal of the first described accumulator and the positive terminal of described voltage source half-bridge inversion circuit, the anode of the second described rectifier diode receives the negative pole end of the second described accumulator and the negative pole end of described voltage source half-bridge inversion circuit, the negative pole end of the first described accumulator connects together with the positive terminal of the second described accumulator, and be connected to the described input of voltage source half-bridge inversion circuit electric capacity brachium pontis and one end of the first described filter inductance, the input of the semiconductor switch brachium pontis of described voltage source half-bridge inversion circuit is connected to one end of the second described filter inductance, the other end of the first described filter inductance is connected to one end of described resistance and capacitances in series filter branch, and as described commutation inversion filter circuit first output, the other end of the second described filter inductance is connected to the other end of described resistance and capacitances in series filter branch, and as described commutation inversion filter circuit second output.
Voltage source half-bridge inversion circuit in above-mentioned commutation inversion filter circuit, comprise the semiconductor switch of two electric capacity and two band anti-paralleled diodes, one end of first described electric capacity connects together the positive terminal as described voltage source half-bridge inversion circuit with the semiconductor switch collector electrode of described first band anti-paralleled diode, one end of second described electric capacity connects together the negative pole end as described voltage source half-bridge inversion circuit with the semiconductor switch emitter of described second band anti-paralleled diode, the other end of the other end of first described electric capacity and described second electric capacity links together as the input of described voltage source half-bridge inversion circuit electric capacity brachium pontis, the semiconductor switch emitter of first described band anti-paralleled diode connects together the input as described voltage source half-bridge inversion circuit semiconductor switch brachium pontis with the semiconductor switch collector electrode of described second band anti-paralleled diode.
Figure 1 shows that the circuit theory diagrams of the phase three-wire three dynamic voltage compensator in series type that the utility model proposes.Phase three-wire three dynamic voltage compensator in series type comprises A, B, C three-phase compensating circuit, every phase compensating circuit comprises autotransformer (1) T1, a commutation inversion filter circuit (2), one group of inverse parallel bypass controllable silicon (3) S1/S2, first inspection switch (4) K2, second inspection switch (5) K3 and auto by pass switch (6) K1, and comprise three ac input ends A, B, C and three ac output ends U, V, W.The input A of A phase compensating circuit receives the first input end of this phase autotransformer (1) T1, one end of this phase first inspection switch (4) K2 and one end of this phase auto by pass switch (6) K1, second input of this phase autotransformer (1) T1 receives the input of B phase compensating circuit, the output of this phase autotransformer (1) T1 receives the input AI of this commutating phase inversion filter circuit (2), first output terminals A O1 of this commutating phase inversion filter circuit (2) receives the other end of this phase first inspection switch (4) K2 and one end of this phase inverse parallel bypass controllable silicon (3) S1/S2, second output terminals A O2 of this commutating phase inversion filter circuit (2) receives one end of this phase second inspection switch (5) K3 and the other end of this phase inverse parallel bypass controllable silicon (3) S1/S2, the other end of this phase second inspection switch (5) K3 receives the other end of this phase auto by pass switch (6) K1, and as the output U of A phase compensating circuit.The mode of connection of B, C phase compensating circuit is identical with A phase.
As shown in Figure 2, commutation inversion filter circuit in phase three-wire three dynamic voltage compensator in series type, comprise the first rectifier diode (7) D1, second rectifier diode (8) D2, first accumulator (9), second accumulator (10), a voltage source half-bridge inversion circuit (11), first filter inductance (12) L1, the second filter inductance (13) L2 and resistance and capacitances in series filter branch (14) R/C.The anode of the first rectifier diode (7) D1 and the negative electrode of the second rectifier diode (8) D2 link together as the input AI of commutation inversion filter circuit, the positive terminal of the first accumulator (9) that the negative electrode of the first rectifier diode (7) D1 is received and the positive terminal of voltage source half-bridge inversion circuit (11), the anode of the second rectifier diode (8) D2 receives the negative pole end of the second accumulator (10) and the negative pole end of voltage source half-bridge inversion circuit (11), the negative pole end of the first accumulator (9) connects together with the positive terminal of the second accumulator (10), and be connected to the input of voltage source half-bridge inversion circuit (11) electric capacity brachium pontis and one end of the first filter inductance (12) L1, the one end of the second filter inductance (13) L2 that the input of the semiconductor switch brachium pontis of voltage source half-bridge inversion circuit (11) is connected to, the other end of the first filter inductance (12) L1 is connected to one end of resistance and capacitances in series filter branch (14), and as commutation inversion filter circuit first output terminals A O1, the other end of the second filter inductance (13) L2 is connected to the other end of resistance and capacitances in series filter branch (14), and as the second output terminals A O2 of commutation inversion filter circuit.Resistance and capacitances in series filter branch (14) are in series by electric capacity C and resistance R.
Voltage source half-bridge inversion circuit (11) in above-mentioned commutation inversion filter circuit, be made up of semiconductor switch S3 and S4 of two electric capacity C1/C2 and two band anti-paralleled diodes, one end of electric capacity C1 connects together the positive terminal as voltage source half-bridge inversion circuit (11) with the collector electrode of the semiconductor switch S3 of band anti-paralleled diode, one end of electric capacity C2 connects together the negative pole end as voltage source half-bridge inversion circuit (11) with the emitter of the semiconductor switch S4 of band anti-paralleled diode, the other end of electric capacity C1 and the other end of electric capacity C2 link together as the input of this voltage source half-bridge inversion circuit (11) electric capacity brachium pontis, semiconductor switch S3 emitter with anti-paralleled diode connects together the input as this voltage source half-bridge inversion circuit (11) semiconductor switch brachium pontis with the collector electrode of the semiconductor switch S4 of band anti-paralleled diode.
The operation principle of the utility model phase three-wire three dynamic voltage compensator in series type is: when supply voltage is normal, and supply voltage is transported to phase three-wire three AC load by the inverse parallel bypass controllable silicon in every phase compensating circuit in turn conducting; When supply voltage falls, inverse parallel bypass controllable silicon in every phase compensating circuit is forced shutdown fast by the semiconductor switch of control voltage source half-bridge inversion circuit, commutation inversion filter circuit is by the bucking voltage controlled required for output afterwards, the part of offset supply Voltage Drop, makes three-phase alternating current load terminal voltage keep stable.When every phase compensating circuit breaks down, the auto by pass switch of its inside can be automatically controlled closure state, and the power supply of proof load is unaffected, and after this disconnecting inspection switch can overhaul every phase compensating circuit.
The utility model circuit also can increase other auxiliary circuits as the application after distortion, the first described accumulator and the second accumulator also can be merged into that an accumulator is attempted by described voltage source half-bridge inversion circuit between positive terminal and negative pole end.Any equivalent transformation circuit done based on the utility model circuit, all belongs to protection range of the present utility model.
Claims (3)
1. a phase three-wire three dynamic voltage compensator in series type, it is characterized in that, comprise A phase compensating circuit, B phase compensating circuit and C phase compensating circuit, every phase compensating circuit comprises an autotransformer, a commutation inversion filter circuit, inverse parallel bypass Group of Silicon Controlled Rectifier, the first inspection switch, the second inspection switch and an auto by pass switch;
The ac input end of A phase compensating circuit is connected to the first input end of this phase autotransformer simultaneously, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of B phase compensating circuit, the output of this phase autotransformer is connected to the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit is connected to the other end of this phase first inspection switch and one end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, second output of this commutating phase inversion filter circuit receives one end of this phase second inspection switch and the other end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of A phase compensating circuit,
The ac input end of B phase compensating circuit is connected to the first input end of this phase autotransformer simultaneously, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of C phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end of this phase first inspection switch and one end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of B phase compensating circuit,
The ac input end of C phase compensating circuit receives the first input end of this phase autotransformer simultaneously, one end of this phase first inspection switch and one end of this phase auto by pass switch, second input of this phase autotransformer receives the ac input end of A phase compensating circuit, the output of this phase autotransformer receives the input of this commutating phase inversion filter circuit, first output of this commutating phase inversion filter circuit receives the other end of this phase first inspection switch and one end of this phase inverse parallel bypass Group of Silicon Controlled Rectifier, second output of this commutating phase inversion filter circuit receives one end and this phase inverse parallel bypass silicon controlled other end of this phase second inspection switch, the other end of this phase second inspection switch receives the other end of this phase auto by pass switch, and as the ac output end of C phase compensating circuit.
2. phase three-wire three dynamic voltage compensator in series type as claimed in claim 1, it is characterized in that, wherein said commutation inversion filter circuit, comprise the first rectifier diode, the second rectifier diode, the first accumulator, second accumulator, a voltage source half-bridge inversion circuit, the first filter inductance, the second filter inductance and a resistance and capacitances in series filter branch; the anode of the first described rectifier diode and the negative electrode of the second described rectifier diode link together as the input of described commutation inversion filter circuit, the negative electrode of the first described rectifier diode receives the positive terminal of the first described accumulator and the positive terminal of described voltage source half-bridge inversion circuit simultaneously, the anode of the second described rectifier diode receives the negative pole end of the second described accumulator and the negative pole end of described voltage source half-bridge inversion circuit simultaneously, the negative pole end of the first described accumulator connects together with the positive terminal of the second described accumulator, and be connected to the described input of voltage source half-bridge inversion circuit electric capacity brachium pontis and one end of the first described filter inductance simultaneously, the input of the semiconductor switch brachium pontis of described voltage source half-bridge inversion circuit is connected to one end of the second described filter inductance, the other end of the first described filter inductance is connected to one end of described resistance and capacitances in series filter branch, and as described commutation inversion filter circuit first output, the other end of the second described filter inductance is connected to the other end of described resistance and capacitances in series filter branch, and as described commutation inversion filter circuit second output.
3. phase three-wire three dynamic voltage compensator in series type as claimed in claim 2, it is characterized in that, wherein said voltage source half-bridge inversion circuit is by the first electric capacity, second electric capacity, the semiconductor switch of the first band anti-paralleled diode and the semiconductor switch composition of the second band anti-paralleled diode, one end of the first described electric capacity connects together the positive terminal as described voltage source half-bridge inversion circuit with the semiconductor switch collector electrode of the described first band anti-paralleled diode, one end of the second described electric capacity connects together the negative pole end as described voltage source half-bridge inversion circuit with the semiconductor switch emitter of the described second band anti-paralleled diode, the other end of the first described electric capacity and the other end of the second described electric capacity link together as the input of described voltage source half-bridge inversion circuit electric capacity brachium pontis, the semiconductor switch emitter of the first described band anti-paralleled diode connects together the input as voltage source half-bridge inversion circuit semiconductor switch brachium pontis with the semiconductor switch collector electrode of the described second band anti-paralleled diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420806970.6U CN204391753U (en) | 2014-12-17 | 2014-12-17 | A kind of phase three-wire three dynamic voltage compensator in series type |
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| CN201420806970.6U CN204391753U (en) | 2014-12-17 | 2014-12-17 | A kind of phase three-wire three dynamic voltage compensator in series type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538974A (en) * | 2014-12-17 | 2015-04-22 | 刘文华 | Three-phase three-wire series connection type dynamic voltage compensator |
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2014
- 2014-12-17 CN CN201420806970.6U patent/CN204391753U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538974A (en) * | 2014-12-17 | 2015-04-22 | 刘文华 | Three-phase three-wire series connection type dynamic voltage compensator |
| CN104538974B (en) * | 2014-12-17 | 2016-09-14 | 刘文华 | A kind of phase three-wire three dynamic voltage compensator in series type |
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