CN112310946B - Flexible direct current converter valve submodule and control method thereof - Google Patents
Flexible direct current converter valve submodule and control method thereof Download PDFInfo
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- CN112310946B CN112310946B CN202011140626.4A CN202011140626A CN112310946B CN 112310946 B CN112310946 B CN 112310946B CN 202011140626 A CN202011140626 A CN 202011140626A CN 112310946 B CN112310946 B CN 112310946B
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- 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
- H02H7/10—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 for converters; for rectifiers
- H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
-
- 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
- H02H7/10—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 for converters; for rectifiers
- H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
- H02H7/122—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 for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- 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
- H02H7/10—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 for converters; for rectifiers
- H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
- H02H7/125—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 for converters; for rectifiers for static converters or rectifiers for rectifiers
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a flexible direct current converter valve submodule and a control method thereof.A control unit controls a power electronic device conducted by a bridge circuit to be turned off when detecting that the converter valve submodule has a fault; after a first set time, turning on the power electronic device connected with the bypass switch in parallel; after the second set duration, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule; and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch. The invention realizes the self-clearing function of the temporary fault of the sub-module by optimizing the control mode of the control module, improves the reliability and the safety of the operation of the converter valve, reduces the workload of the maintenance of the converter valve and achieves the aim of no maintenance or less maintenance.
Description
Technical Field
The invention relates to the technical field of high-voltage direct-current power transmission, in particular to a flexible direct-current converter valve submodule and a control method thereof.
Background
With the change of global energy patterns and the development of direct current transmission technology and current conversion technology, flexible direct current transmission has great application prospect and is a strategic choice for changing the development patterns of large power grids.
The development of the flexible direct current conversion equipment is an important component of the flexible direct current system in the field of power transmission and distribution, and plays a role in the beginning and the end of the flexible direct current transmission process. At present, the sub-modules of the converter valve for flexible direct current power transmission are different in topological structure, and mainly comprise a full-bridge sub-module and a half-bridge sub-module. However, in the application of the flexible straight engineering, the converter valve sub-module is in adverse environmental factors such as complex electromagnetic interference, vibration and the like, so that sub-module misinformation fault information frequently occurs in the operation process of the converter valve due to external interference, even a sub-module bypass switch is switched on, the operation stability is affected, and the operation and maintenance workload is increased.
Disclosure of Invention
Aiming at the problems of system faults and large operation and maintenance workload caused by short-time faults or interference signals, the invention provides the flexible direct current converter valve submodule and the control method thereof, which realize the self-clearing function of temporary faults of the submodule by optimizing the control mode of the control module, improve the reliability and the safety of the operation of the converter valve, reduce the maintenance workload of the converter valve and achieve the aim of no maintenance or less maintenance.
In order to achieve the purpose, the invention provides a flexible direct current converter valve submodule which comprises a bypass switch, a thyristor, a bridge type loop, a capacitor unit, a voltage-sharing resistor and a control unit, wherein the bypass switch is connected with the thyristor;
the bypass switch is connected between two access ends of the flexible direct current converter valve submodule and is reversely connected with the thyristor in parallel;
the capacitor module is connected between the bridge circuit and two output ends of the converter valve submodule, and the voltage equalizing resistor device is connected with the capacitor module in parallel; the bridge circuit is a bridge circuit formed by power electronic devices and controls the capacitor module to be switched on and off;
when the control unit detects that the converter valve submodule has faults, the control unit controls the conducted power electronic devices in the bridge type loop to be turned off, and the capacitor module is cut off; after the first set time, conducting a power electronic device connected with the bypass switch in parallel, and transferring the fault current of the bypass switch; after the second set duration, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule; and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch.
Further, the control unit accumulates the failure recovery times, and stops the failure recovery and closes the bypass switch if the failure recovery times exceed a set threshold.
Further, the first set time length meets the judgment time length of the turn-off and control logic of the power electronic device which is conducted by the bridge type loop.
Further, after the first set time, the control unit detects whether the bridge circuit power electronic device is turned off, and if the bridge circuit power electronic device is not turned off, the bypass switch is closed, and fault recovery is not performed any more.
Further, the second set duration satisfies a duration that the arc current will fully transfer to the power electronics in parallel with the bypass switch.
Furthermore, the bridge circuit is a full-wave bridge circuit or a half-wave bridge circuit formed by power electronic devices.
The invention also provides a control method of the flexible direct current converter valve submodule, which comprises the following steps:
when the control unit detects that the converter valve submodule has faults, the control unit controls the conducted power electronic devices in the bridge type loop to be turned off, and the capacitor module is cut off;
after the first set time, detecting whether the bridge type loop power electronic device is turned off, if not, closing the bypass switch, and not performing fault recovery; if the bypass switch is turned off, the power electronic device connected with the bypass switch in parallel is turned on, and the fault current of the bypass switch is transferred;
after the second set time, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule;
and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch.
Further, the control unit accumulates the failure recovery times, and stops the failure recovery and closes the bypass switch if the failure recovery times exceed a set threshold.
Further, the first set time length meets the judgment time length of the turn-off and control logic of the power electronic device which is conducted by the bridge type loop.
Further, the second set time period satisfies a time period during which the arc current will fully transfer to the power electronics in parallel with the bypass switch.
The technical scheme of the invention has the following beneficial technical effects:
the invention realizes the self-clearing function of temporary faults of the sub-modules by optimizing the control mode of the control module, improves the reliability and the safety of the operation of the converter valve, reduces the workload of the maintenance of the converter valve and achieves the aim of no maintenance or less maintenance.
Drawings
FIG. 1 is a schematic circuit diagram of a converter valve half-bridge submodule control method;
FIG. 2 is a flow chart of a converter valve half-bridge submodule control method;
FIG. 3 is a circuit schematic diagram of a converter valve full-bridge submodule control method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The method mainly aims at optimizing the control method of the converter valve submodule, adopts the technologies of short-time fault self-clearing, fault recurrence judgment and the like, eliminates the submodule locking caused by interference or short-time fault, and solves the problems of system fault and large operation and maintenance workload caused by the short-time fault or interference signal.
The invention provides a flexible direct current converter valve submodule which comprises a bypass switch, a thyristor, a bridge circuit, a capacitor unit, a voltage-sharing resistor and a control unit, wherein the bypass switch is connected with the thyristor;
the bypass switch is connected between two access ends of the flexible direct current converter valve submodule and is reversely connected with the thyristor in parallel;
the capacitor module is connected between the bridge circuit and two output ends of the converter valve submodule, and the voltage equalizing resistor device is connected with the capacitor module in parallel; the bridge circuit is a bridge circuit formed by power electronic devices and controls the capacitor module to be switched on and switched off; and when the fault occurs, the capacitor module is cut off through a bridge type loop power electronic device, and the power electronic device connected with the bypass switch in parallel in the bridge type loop is conducted to transfer the fault current of the bypass switch.
When the control unit detects that the converter valve submodule has faults, the control unit controls the conducted power electronic devices in the bridge type loop to be turned off, and the capacitor module is cut off; after a first set time, turning on the power electronic device connected with the bypass switch in parallel; after the second set duration, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule; and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch. And the control unit accumulates the failure recovery times, stops the failure recovery if the failure recovery times exceed a set threshold value, and closes the bypass switch.
Further, the first set time period satisfies the turn-off and control logic judgment time period of the power electronic device which is switched on by the bridge circuit, so that if the power electronic device can normally work, the turn-off action can be completed within the time period, and the first set time period is 0.1-0.5 milliseconds, for example.
The second set time period is a time period for which the arc current is completely transferred to the power electronic device connected in parallel with the bypass switch, and the transfer time is usually 0.5-2 milliseconds, and the second set time period is 3-5 milliseconds, for example.
The invention provides a control method of a flexible direct current converter valve submodule, which comprises the following steps:
(1) when the control unit detects that the converter valve submodule has faults, the control unit controls the power electronic device which is conducted by the bridge type loop to be turned off, and the capacitor module is cut off;
(2) after the first set time, detecting whether the bridge type loop power electronic device is turned off, if not, closing the bypass switch, and not performing fault recovery; if turned off, turning on power electronics in parallel with the bypass switch;
(3) after the second set time, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule;
(4) carrying out fault detection, if the fault is not detected, completing fault recovery, and entering the step (5), otherwise, closing the bypass switch;
(5) and accumulating the failure recovery times, stopping the failure recovery if the failure recovery times exceed a set threshold value, and closing the bypass switch.
The bridge circuit is a half-wave bridge circuit or a full-wave bridge circuit formed by power electronic devices, and the following description is respectively combined with the two circuits.
Example 1
In the embodiment of the converter valve half-bridge sub-module, as shown in fig. 1 and fig. 2, when the converter valve sub-module has a fault, the control module detects a sub-module fault signal to disconnect the power electronic device T1 from the power electronic device T2, after the control module delays for a time T1, the control module determines whether the power electronic device T1 is disconnected, if not, the control module indicates that the fault current is too large or the device has a fault, closes the bypass switch K, does not perform fault recovery, and if the control module is disconnected, continues to perform fault recovery. And then the T2 is conducted, the current input to the sub-module by the system is transferred to the power electronic device T2, the system current can be completely transferred to the power electronic device T2, the controller delays for T2 time, then the power electronic device T2 is turned off, then the power electronic device T1 is conducted, the capacitor C is put into use, if the control module detects the fault signal again, the operation is repeated, the number of times of the fault reaches a set value, the control module judges that the fault is a permanent fault, the bypass switch K is switched on, and the modules of the power electronic devices T1 and T2 are locked. And if the capacitor is put into the controller again and the fault is not detected, the fault is judged to be cleared, and the normal operation can be realized.
The process of self-clearing of the temporary fault is illustrated according to the fault type, firstly, assuming that the fault is a power electronic driving fault caused by an external temporary interference signal, according to the control program, after the controller locks the power electronic devices T1 and T2, when the capacitor is switched in again, the control module detects the fault and indicates that the temporary fault is cleared. Because the external interference signal belongs to a small probability event, the repeated occurrence of the external interference signal for many times can not occur, so that the failure times can be accumulated to judge whether the failure is a temporary failure or not. If the fault is a loop connected in parallel with the power electronic device, such as a bypass switch K insulation breakdown, a thyristor Thy insulation breakdown and the like, the controller causes the power electronic devices T1 and T2 to be locked due to the temporary insulation breakdown caused by overvoltage, when the power electronic device T2 is conducted after the time T1 is delayed, the arc voltage is formed at the insulation breakdown part, and according to the negative resistance characteristic of the arc, when the arc voltage is larger than the conduction voltage drop of the power electronic device T2 connected in parallel with the arc voltage, the arc current can be completely transferred to the power electronic device T2, and the arc is extinguished. When the controller delays the time T2 to turn off the T2, the breakdown fault is cleared, and according to the program, the control module enables the capacitor to be switched in again, if the fault does not reappear any more, the fault is a temporary fault, and the system operates normally.
If the system fails permanently for other reasons, the controller closes the bypass switch and latches the power electronics T1, T2, causing the sub-module to be bypassed by the bypass switch.
Example 2
As shown in fig. 3, when the upper arm power electronic device T1 and the lower arm power electronic device T4 are conducted to operate, and when the converter valve sub-module fails, the control module detects a sub-module failure signal to lock the power electronic devices T1 and T4, the power electronic device T2 delays the system current and transfers the system current to the power electronic device T2 and the diode D4 connected in anti-parallel with the power electronic device T4, and the power electronic device T2 is turned off after a certain delay time. And the control module switches on the power electronic devices T1 and T4 to enable the capacitor C to be in an input state, if the control module detects the fault signal again and repeats the operations, the number of the faults reaches a set value, the fault is judged to be a permanent fault, the control module switches on the bypass switch K, and the power electronic devices T1 and T4 are locked. And if the capacitor is put into the controller again and the fault is not detected, the fault is judged to be cleared, and the normal operation can be realized.
In summary, the present invention relates to a flexible dc converter valve sub-module and a control method thereof, wherein when a control unit detects a fault of the converter valve sub-module, the control unit controls a power electronic device connected to a bridge circuit to be turned off; after a first set time, turning on the power electronic device connected with the bypass switch in parallel; after the second set time, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule; and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch. The invention realizes the self-clearing function of the temporary fault of the sub-module by optimizing the control mode of the control module, improves the reliability and the safety of the operation of the converter valve, reduces the workload of the maintenance of the converter valve and achieves the aim of no maintenance or less maintenance.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A flexible direct current converter valve submodule is characterized by comprising a bypass switch, a thyristor, a bridge circuit, a capacitor module, a voltage-sharing resistor and a control unit;
the bypass switch is connected between two access ends of the flexible direct current converter valve submodule and is reversely connected with the thyristor in parallel;
the capacitor module is connected between the bridge circuit and two output ends of the converter valve submodule, and the voltage equalizing resistor device is connected with the capacitor module in parallel; the bridge circuit is a bridge circuit formed by power electronic devices and controls the capacitor module to be switched on and off;
when the control unit detects that the converter valve submodule has faults, the control unit controls the conducted power electronic devices in the bridge type loop to be turned off, and the capacitor module is cut off; after the first set time, conducting a power electronic device connected with the bypass switch in parallel, and transferring the fault current of the bypass switch; after the second set time, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule; and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch.
2. The sub-module according to claim 1, wherein the control unit accumulates failure recovery times, stops failure recovery if a set threshold is exceeded, and closes the bypass switch.
3. The flexible direct current converter valve sub-module according to claim 1 or 2, wherein the first set time period satisfies a turn-off and control logic determination time period of a power electronic device that the bridge circuit is turned on.
4. The flexible dc converter valve sub-module of claim 3, wherein after a first set time period, the control unit detects whether the power electronics of the bridge circuit not connected in parallel with the bypass switch are turned off, and if not, closes the bypass switch and does not perform fault recovery.
5. The flexible dc converter valve sub-module of claim 4, wherein the second set time period satisfies a time period during which arc current will fully transfer to power electronics in parallel with the bypass switch.
6. The sub-module according to claim 1 or 2, wherein the bridge circuit is a full-wave bridge circuit or a half-wave bridge circuit of power electronics.
7. A control method of the flexible direct current converter valve sub-module according to any one of claims 1 to 5, characterized by comprising:
when the control unit detects that the converter valve submodule has faults, the control unit controls the conducted power electronic devices in the bridge type loop to be turned off, and the capacitor module is cut off;
after a first set time, detecting whether a power electronic device of the bridge circuit, which is not connected with the bypass switch in parallel, is turned off, if not, closing the bypass switch, and no longer performing fault recovery; if the bypass switch is turned off, the power electronic device connected with the bypass switch in parallel is turned on, and the fault current of the bypass switch is transferred;
after the second set duration, turning off the power electronic device connected with the bypass switch in parallel, and recovering the original control time sequence of the flexible direct current converter valve submodule;
and carrying out fault detection, if the fault is not detected, completing fault recovery, otherwise, closing the bypass switch.
8. The control method according to claim 7, wherein the control unit accumulates the number of failure recovery times, and if a set threshold value is exceeded, stops failure recovery and closes the bypass switch.
9. The control method according to claim 7, wherein the first set time period satisfies a time period for turning off and controlling logic of the power electronic device of the bridge circuit.
10. The control method of claim 7, wherein the second set time period satisfies a time period during which arc current will fully transfer to power electronics in parallel with the bypass switch.
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| CN202011140626.4A CN112310946B (en) | 2020-10-22 | 2020-10-22 | Flexible direct current converter valve submodule and control method thereof |
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| CN113156218A (en) * | 2021-04-29 | 2021-07-23 | 特变电工西安柔性输配电有限公司 | Online life monitoring protection method, device, equipment and medium for thin film capacitor |
| CN114189135A (en) * | 2021-11-10 | 2022-03-15 | 许继电气股份有限公司 | Converter valve bridge arm submodule with overvoltage suppression function, control method of converter valve bridge arm submodule and converter valve |
| CN114779061A (en) * | 2022-03-25 | 2022-07-22 | 国网北京市电力公司 | Flexible direct current converter valve module fault analysis method |
| CN117458849B (en) * | 2023-10-19 | 2024-04-16 | 国网经济技术研究院有限公司 | Flexible direct current converter valve submodule topological structure and parameter design method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680421A (en) * | 2014-11-17 | 2016-06-15 | 南京南瑞继保电气有限公司 | Protection method for modular multilevel converter |
| CN106505512A (en) * | 2016-12-07 | 2017-03-15 | 北京四方继保自动化股份有限公司 | Unlock number of times again to overflow trip method after soft straight control system temporary blocking |
| CN107104418A (en) * | 2017-04-28 | 2017-08-29 | 南京南瑞继保电气有限公司 | Converter valve submodule unit, modularization multi-level converter and its control method |
| EP3713074A1 (en) * | 2019-03-21 | 2020-09-23 | General Electric Technology GmbH | Apparatus and methods for voltage control |
-
2020
- 2020-10-22 CN CN202011140626.4A patent/CN112310946B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680421A (en) * | 2014-11-17 | 2016-06-15 | 南京南瑞继保电气有限公司 | Protection method for modular multilevel converter |
| CN106505512A (en) * | 2016-12-07 | 2017-03-15 | 北京四方继保自动化股份有限公司 | Unlock number of times again to overflow trip method after soft straight control system temporary blocking |
| CN107104418A (en) * | 2017-04-28 | 2017-08-29 | 南京南瑞继保电气有限公司 | Converter valve submodule unit, modularization multi-level converter and its control method |
| EP3713074A1 (en) * | 2019-03-21 | 2020-09-23 | General Electric Technology GmbH | Apparatus and methods for voltage control |
| WO2020187479A1 (en) * | 2019-03-21 | 2020-09-24 | General Electric Technology Gmbh | Apparatus and methods for voltage control |
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