CN117595349A - Efficient medium-voltage alternating current interconnection device and control method thereof - Google Patents
Efficient medium-voltage alternating current interconnection device and control method thereof Download PDFInfo
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- CN117595349A CN117595349A CN202311552305.9A CN202311552305A CN117595349A CN 117595349 A CN117595349 A CN 117595349A CN 202311552305 A CN202311552305 A CN 202311552305A CN 117595349 A CN117595349 A CN 117595349A
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- 230000000903 blocking effect Effects 0.000 claims abstract description 46
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 42
- 239000004065 semiconductor Substances 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- 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
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/75—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/757—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a high-efficiency medium-voltage alternating current interconnection device and a control method thereof, wherein the device comprises three-phase bridge arms, each phase bridge arm comprises a single-phase reactor, a single-phase full-control valve and a single-phase switching valve which are connected in series; the single-phase full-control valve comprises N adjusting modules, wherein each adjusting module comprises a rectifying full-bridge circuit and an inversion full-bridge circuit which are connected in parallel at a direct current side, and alternating current ports of the N inversion full-bridge circuits are sequentially cascaded to serve as two ports of the single-phase full-control valve; the single-phase switch valve comprises a first nonlinear resistor, M bidirectional blocking power semiconductor units and M blocking capacitors, wherein the M bidirectional blocking power semiconductor units are sequentially connected in series, two ends of the M bidirectional blocking power semiconductor units serve as two ports of the single-phase switch valve, the M blocking capacitors are correspondingly connected in parallel with two ends of the M bidirectional blocking power semiconductor units, and two ends of the nonlinear resistor are respectively connected with two ports of the single-phase switch valve. The technical scheme can bear the overvoltage problem caused by alternating current faults and has low cost.
Description
Technical Field
The invention belongs to the technical field of high-voltage direct-current transmission, and particularly relates to a high-efficiency medium-voltage alternating-current interconnection device and a control method thereof.
Background
At present, with the continuous improvement of requirements of users on electricity demand, electric energy quality, power supply reliability and the like, the traditional power supply network is more and more difficult to meet the power supply demands of users. When one of the existing power supply and distribution networks is overloaded or fails, a large-scale power outage is often caused. The flexible interconnection device based on the power electronic conversion technology can be connected with power supplies of different power supply areas or power supplies of different buses to realize ring-closing operation, and meanwhile, the flexible interconnection device can also play roles of supporting each other between the power supply areas and balancing power flow.
The traditional interconnection device adopts an MMC back-to-back scheme, has the functions of double-end reactive compensation and fault isolation, but has the problems of high cost, low transmission efficiency and large occupied area.
The patent (CN 115483683A) mentions a serial flexible alternating current loop closing topology, which has the advantages of controllable bidirectional power, fault isolation, high efficiency and the like; the installation and replacement current chain consists of a plurality of power modules, and under the condition that the amplitude difference and the phase angle difference of the alternating current power supplies at two sides connected by the device are smaller, the number of the modules playing a role in regulation is small in practice, but when one side of the alternating current power supplies at two sides connected has a low voltage fault, the differential pressure applied to two ends of the device can be suddenly increased, and the differential pressure is applied to the power modules to cause direct current overvoltage on the modules, so that the number of the power modules can be increased to adapt to the fault working condition, the overvoltage generated at the alternating current side under the fault working condition is shared, and the cost of the device is greatly increased. There is currently a lack of a low cost solution to the overvoltage problem associated with ac faults.
Disclosure of Invention
The invention aims to provide a high-efficiency medium-voltage alternating current interconnection device and a control method thereof, which can bear the overvoltage problem caused by alternating current faults and have low cost.
In order to achieve the above object, the solution of the present invention is:
the high-efficiency medium-voltage alternating current interconnection device comprises three-phase bridge arms, wherein each phase bridge arm in the three-phase bridge arms comprises a single-phase reactor, a single-phase full-control valve and a single-phase switching valve, the single-phase reactors, the single-phase full-control valve and the single-phase switching valve are sequentially connected in series, the other end of the single-phase reactor is connected into a first alternating current system, and the other end of the single-phase switching valve 3 is connected into a second alternating current system;
the single-phase full-control valve comprises N adjusting modules, wherein N is more than or equal to 1; the regulating module comprises a rectifying full-bridge circuit and an inversion full-bridge circuit which are connected in parallel at a direct current side, and alternating current ports of N inversion full-bridge circuits in the single-phase full-control valve are sequentially cascaded to serve as two ports of the single-phase full-control valve; the alternating current port of the rectification full-bridge circuit is connected with the secondary winding of the multi-winding transformer, and the primary winding of the multi-winding transformer is connected with any AC alternating current system;
the single-phase switching valve comprises a first nonlinear resistor, M bidirectional blocking power semiconductor units and M blocking capacitors, wherein M is more than or equal to 1; when m=1, the nonlinear resistor, the bidirectional blocking power semiconductor unit and the blocking capacitor are connected in parallel; when M >1, M bidirectional blocking power semiconductor units are sequentially connected in series, M blocking capacitors are correspondingly connected in parallel to two ends of the M bidirectional blocking power semiconductor units one by one, two ends of the M bidirectional blocking power semiconductor units which are sequentially connected in series serve as two ports of the single-phase switch valve, and two ends of the nonlinear resistor are respectively connected with two ports of the single-phase switch valve.
The bidirectional blocking power semiconductor unit comprises power semiconductor devices which are reversely connected in series.
The alternating current port of the inversion full-bridge circuit in the single-phase full-control valve is also connected with a bypass switch and/or a bidirectional thyristor in parallel.
The two ends of the single-phase full-control valve are also connected with a bidirectional thyristor or/and a second nonlinear resistor in parallel.
The blocking capacitor of the single-phase switch valve is also connected with a diode and/or a resistance element in series; when diodes are connected in series, the cathodes of the diodes are connected to the blocking capacitor anode.
The single-phase switching valve is provided with a valve control unit and a driving isolation circuit, the valve control unit is communicated with a module control unit of the adjusting module, and the driving isolation circuit receives a driving signal of the valve control unit and controls the on and off of the power semiconductor device.
The action voltage of the first nonlinear resistor is smaller than or equal to the difference between the maximum voltage at two ends of the device and the maximum voltage bearable by the regulating module.
The control method of the high-efficiency medium-voltage alternating current interconnection device comprises the following steps of,
judging the working state of the device;
when the device works in a normal working state, the adjusting module of the single-phase full-control valve and the bidirectional blocking power semiconductor unit of the single-phase switching valve are controlled to be conducted;
when the device works in an overvoltage working state, the control and regulation module is locked, and the bidirectional blocking power semiconductor unit of the single-phase switch valve is locked.
The working state of the judging device comprises that the judging device works in a normal working state, and the judging condition is that the difference of the phase voltages of the alternating current systems at two ends of the device is within a preset range.
The working state of the judging device comprises that the judging device works in an overvoltage working state, and the judging condition is that the difference of the phase voltages of the alternating current systems at two ends of the device exceeds a preset range.
Judging the working state of the device, wherein the working state comprises that the device is judged to work in an overvoltage working state, and the judging condition is that the difference between the phase voltages of the alternating current systems at two ends of the device exceeds a preset range and the voltage at the direct current side of an adjusting module of the single-phase full-control valve does not exceed a threshold value;
judging that the device works in a severe overvoltage working state, wherein the judging condition is that the difference of the phase voltages of an alternating current system at two ends of the device exceeds a preset range and the voltage of the direct current side of an adjusting module of the single-phase full-control valve exceeds a threshold value;
the alternating current port of the inversion full-bridge circuit in the single-phase full-control valve is also connected with a bypass switch and/or a bidirectional thyristor in parallel; when the device works in a severe overvoltage working state, a bypass switch and/or a bidirectional thyristor connected in parallel with an alternating current port of the inversion full-bridge circuit of the single-phase full-control valve are/is triggered to be conducted.
After the scheme is adopted, the invention has the following specific beneficial effects compared with the prior art:
(1) The series valve contained in the high-efficiency medium-voltage alternating current interconnection device is formed by connecting a single-phase full-control valve and a single-phase switch valve in series; the regulating module of the single-phase full-control valve is responsible for compensating the differential pressure at two ends by the output voltage, and regulating the current flowing through the device by changing the amplitude and the phase of the output voltage; the single-phase switch valve bypasses at ordinary times, has low loss, breaks the power semiconductor device when in fault, plays the role of a solid-state switch, and blocks the current flowing through the device when the capacitor and the nonlinear resistor provide voltage. The device has flexible operation mode and high efficiency;
(2) The single-phase switch valve adopts a high-voltage design, and the voltage stress can be shared for the adjusting module by reasonably distributing the quantity proportion of the single-phase switch valve to the adjusting module, so that the adjusting module is effectively protected; because the single-phase switch valve has simple structure, low cost and small occupied area, the whole cost and occupied area of the device are reduced as a whole.
Drawings
FIG. 1 is a schematic diagram of a high efficiency medium voltage AC interconnection apparatus of the present invention;
FIG. 2 is a schematic diagram of a single-phase switching valve in the high-efficiency medium-voltage AC interconnection device of the present invention;
FIG. 3 is a schematic diagram of another preferred construction of a single-phase switching valve in the high-efficiency medium-voltage AC interconnection apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a high-efficiency medium-voltage ac interconnection device, where the ac interconnection device includes three-phase bridge arms, each phase bridge arm 1 in the three-phase bridge arms includes a single-phase reactor 13, a single-phase full-control valve and a single-phase switching valve 3, where the single-phase reactor 13, the single-phase full-control valve and the single-phase switching valve are sequentially connected in series, the other end of the single-phase reactor 13 is connected to an ac system S1, and the other end of the single-phase switching valve 3 is connected to an ac system S2.
Still referring to FIG. 1, the single-phase fully-controlled valve comprises N regulating modules 2, wherein N is equal to or greater than 1; the regulating module comprises a rectifying full-bridge circuit 5 and an inversion full-bridge circuit 6 which are connected in parallel at the direct current side, and alternating current ports of N inversion full-bridge circuits in the single-phase full-control valve are sequentially cascaded to serve as two ports of the single-phase full-control valve; the alternating current port of the rectification full-bridge circuit is connected with a secondary winding X2 of the multi-winding transformer, and a primary winding X1 of the multi-winding transformer is connected with any AC alternating current system.
As shown in FIG. 2, the single-phase switching valve 3 comprises a first nonlinear resistor 8, M bidirectional blocking power semiconductor units 10 and M blocking capacitors 9, wherein M is larger than or equal to 1; when m=1, the nonlinear resistor, the bidirectional blocking power semiconductor unit and the blocking capacitor are connected in parallel; when M >1, M bidirectional blocking power semiconductor units are sequentially connected in series, M blocking capacitors are correspondingly connected in parallel to two ends of the M bidirectional blocking power semiconductor units one by one, two ends of the M bidirectional blocking power semiconductor units which are sequentially connected in series serve as two ports of the single-phase switch valve, and two ends of the nonlinear resistor are respectively connected with two ports of the single-phase switch valve.
As a preferred embodiment of the present invention, the bidirectional blocking power semiconductor unit includes power semiconductor devices connected in reverse series to break bidirectional current; in particular, the bidirectional blocking power semiconductor unit is formed by two IGBTs with antiparallel diodes connected in series.
As a preferred embodiment of the present invention, the ac port of the inverter full bridge circuit in the single-phase full-control valve may also be connected in parallel with a bypass switch and/or a triac.
As a preferred embodiment of the invention, the two ends of the single-phase full-control valve are also connected with a bidirectional thyristor or/and a second nonlinear resistor in parallel.
As a preferred embodiment of the present invention, the blocking capacitor of the single-phase switch valve is further connected in series with a diode or/and a resistive element; and the cathode of the diode is connected with the anode of the blocking capacitor. The power semiconductor device in reverse series comprises one or a combination of IGBT, IGCT, MOSFET, GTO and thyristors. In this embodiment in a serial fashion.
In accordance with another preferred embodiment of the present invention, as shown in fig. 3, there is provided a high efficiency medium voltage ac interconnection device wherein the single phase switching valve is provided with at least one valve control unit 12 for communicating with the module control unit of the regulating module.
As a preferred embodiment of the present invention, the single-phase switching valve is further provided with a driving isolation circuit 11, which can receive an external driving signal and control on and off of the power semiconductor device after potential isolation; the valve control unit is in communication with a drive isolation circuit of the single-phase switching valve, and the external drive signal is from the valve control unit.
In a preferred embodiment of the present invention, the operating voltage of the first nonlinear resistor is less than or equal to the difference between the maximum voltage across the device and the maximum sustainable voltage of the adjusting module.
The embodiment of the invention also provides a control method of the high-efficiency medium-voltage alternating current interconnection device, which comprises the steps of firstly judging the working state of the device, wherein the working state comprises a normal working state, an overvoltage working state and a serious overvoltage working state, and adopting different control schemes according to different working states:
when the device works in a normal working state, the regulating module is responsible for compensating the voltage vector difference of the alternating current systems at two ends; the bidirectional blocking power semiconductor unit of the single-phase switch valve is conducted;
when the device works in an overvoltage working state, the control and regulation module is locked, the bidirectional blocking power semiconductor unit of the single-phase switch valve is locked, and the first nonlinear resistor action bears overvoltage.
When the device works in a severe overvoltage working state, a bypass switch and/or a bidirectional thyristor which are connected in parallel with an alternating current port of the inversion full-bridge circuit of the single-phase full-control valve are triggered and conducted; or triggering and conducting the bidirectional thyristors connected in parallel at the two ends of the single-phase full-control valve.
As a preferred embodiment of the present invention, the judging device works in a normal working state, specifically, the difference between the phase voltages of the AC system at two ends is within a preset range.
As a preferred embodiment of the invention, the judging device works in an overvoltage working state, and the specific condition is that the difference of the phase voltages of the alternating current systems at two ends exceeds a preset range, and the direct current side voltage of the regulating module of the single-phase full-control valve does not exceed a threshold value.
As a preferred embodiment of the invention, the judging device works in a severe overvoltage working state, namely that the difference of the phase voltages of the alternating current systems at two ends exceeds a preset range, and the direct current side voltage of the regulating module of the single-phase full-control valve exceeds a threshold value.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the invention can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (11)
1. The utility model provides a high-efficient medium voltage alternating current interconnection device which characterized in that: the three-phase power supply comprises three-phase bridge arms, wherein each phase bridge arm in the three-phase bridge arms comprises a single-phase reactor, a single-phase full-control valve and a single-phase switch valve, the single-phase reactors, the single-phase full-control valve and the single-phase switch valve are sequentially connected in series, the other end of the single-phase reactor is connected with a first alternating current system, and the other end of the single-phase switch valve 3 is connected with a second alternating current system;
the single-phase full-control valve comprises N adjusting modules, wherein N is more than or equal to 1; the regulating module comprises a rectifying full-bridge circuit and an inversion full-bridge circuit which are connected in parallel at a direct current side, and alternating current ports of N inversion full-bridge circuits in the single-phase full-control valve are sequentially cascaded to serve as two ports of the single-phase full-control valve; the alternating current port of the rectification full-bridge circuit is connected with the secondary winding of the multi-winding transformer, and the primary winding of the multi-winding transformer is connected with any AC alternating current system;
the single-phase switching valve comprises a first nonlinear resistor, M bidirectional blocking power semiconductor units and M blocking capacitors, wherein M is more than or equal to 1; when m=1, the nonlinear resistor, the bidirectional blocking power semiconductor unit and the blocking capacitor are connected in parallel; when M >1, M bidirectional blocking power semiconductor units are sequentially connected in series, M blocking capacitors are correspondingly connected in parallel to two ends of the M bidirectional blocking power semiconductor units one by one, two ends of the M bidirectional blocking power semiconductor units which are sequentially connected in series serve as two ports of the single-phase switch valve, and two ends of the nonlinear resistor are respectively connected with two ports of the single-phase switch valve.
2. The high efficiency medium voltage ac interconnection apparatus of claim 1 wherein: the bidirectional blocking power semiconductor unit includes power semiconductor devices connected in reverse series.
3. The high efficiency medium voltage ac interconnection apparatus of claim 1 wherein: the alternating current port of the inversion full-bridge circuit in the single-phase full-control valve is also connected with a bypass switch and/or a bidirectional thyristor in parallel.
4. The high efficiency medium voltage ac interconnection apparatus of claim 1 wherein: and two ends of the single-phase full-control valve are also connected with a bidirectional thyristor or/and a second nonlinear resistor in parallel.
5. The high efficiency medium voltage ac interconnection apparatus of claim 1 wherein: the blocking capacitor of the single-phase switching valve is also connected with a diode and/or a resistance element in series; when diodes are connected in series, the cathodes of the diodes are connected to the blocking capacitor anode.
6. The high efficiency medium voltage ac interconnection apparatus of claim 1 wherein: the single-phase switch valve is provided with a valve control unit and a driving isolation circuit, the valve control unit is communicated with a module control unit of the adjusting module, and the driving isolation circuit receives a driving signal of the valve control unit and controls the on and off of the power semiconductor device.
7. The high efficiency medium voltage ac interconnection apparatus of claim 1 wherein: the action voltage of the first nonlinear resistor is smaller than or equal to the difference value between the maximum voltage at two ends of the device and the maximum bearable voltage of the regulating module.
8. The method for controlling an efficient medium voltage ac interconnection apparatus according to claim 1, wherein:
judging the working state of the device;
when the device works in a normal working state, the adjusting module of the single-phase full-control valve and the bidirectional blocking power semiconductor unit of the single-phase switching valve are controlled to be conducted;
when the device works in an overvoltage working state, the control and regulation module is locked, and the bidirectional blocking power semiconductor unit of the single-phase switch valve is locked.
9. The control method according to claim 8, characterized in that: the working state of the judging device comprises that the judging device works in a normal working state, and the judging condition is that the difference of the phase voltages of the alternating current systems at two ends of the device is within a preset range.
10. The control method according to claim 8, characterized in that: the working state of the judging device comprises that the judging device works in an overvoltage working state, and the judging condition is that the difference of the phase voltages of the alternating current systems at two ends of the device exceeds a preset range.
11. The control method according to claim 10, characterized in that: judging the working state of the device, wherein the working state comprises that the device is judged to work in an overvoltage working state, and the judging condition is that the difference between the phase voltages of the alternating current systems at two ends of the device exceeds a preset range and the voltage at the direct current side of an adjusting module of the single-phase full-control valve does not exceed a threshold value;
judging that the device works in a severe overvoltage working state, wherein the judging condition is that the difference of the phase voltages of an alternating current system at two ends of the device exceeds a preset range and the voltage of the direct current side of an adjusting module of the single-phase full-control valve exceeds a threshold value;
the alternating current port of the inversion full-bridge circuit in the single-phase full-control valve is also connected with a bypass switch and/or a bidirectional thyristor in parallel; when the device works in a severe overvoltage working state, a bypass switch and/or a bidirectional thyristor connected in parallel with an alternating current port of the inversion full-bridge circuit of the single-phase full-control valve are/is triggered to be conducted.
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| CN202311552305.9A CN117595349A (en) | 2023-11-20 | 2023-11-20 | Efficient medium-voltage alternating current interconnection device and control method thereof |
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| CN202311552305.9A CN117595349A (en) | 2023-11-20 | 2023-11-20 | Efficient medium-voltage alternating current interconnection device and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117955107A (en) * | 2024-03-26 | 2024-04-30 | 长峡数字能源科技(湖北)有限公司 | Flexible interconnection switch based on but fast switch over hybrid transformer |
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2023
- 2023-11-20 CN CN202311552305.9A patent/CN117595349A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117955107A (en) * | 2024-03-26 | 2024-04-30 | 长峡数字能源科技(湖北)有限公司 | Flexible interconnection switch based on but fast switch over hybrid transformer |
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