CN110474299B - Bypass state cycle reporting method and topology structure of power unit - Google Patents
Bypass state cycle reporting method and topology structure of power unit Download PDFInfo
- Publication number
- CN110474299B CN110474299B CN201910752679.2A CN201910752679A CN110474299B CN 110474299 B CN110474299 B CN 110474299B CN 201910752679 A CN201910752679 A CN 201910752679A CN 110474299 B CN110474299 B CN 110474299B
- Authority
- CN
- China
- Prior art keywords
- power unit
- bypass
- port
- unit
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H02H7/1203—Circuits independent of the type of conversion
- H02H7/1206—Circuits independent of the type of conversion specially adapted to conversion cells composed of a plurality of parallel or serial connected elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
A bypass state cycle reporting method and a topology structure of power units are provided, wherein the following ports are arranged in a bypass trigger circuit of each power unit: the bypass trigger input signal port, the bypass contactor state signal output port reported to the power unit and the bypass contactor state signal output port reported to the adjacent power unit; the following ports are provided in the cell control circuit of each power cell: an uplink optical fiber port from a unit control circuit to a main controller, a downlink optical fiber port from the main controller to the unit control circuit, a bypass trigger output signal port, a state signal input port of a bypass contactor of the power unit and a state signal optical fiber input port of a bypass contactor of an adjacent power unit; the power units with two or more numbers are circularly interconnected through the optical fibers, and after the uplink communication optical fibers from the power units to the control system are disconnected, the control system can judge the state of the bypass contactor of the power unit through the adjacent power units.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a bypass state cycle reporting method and a topology structure of a power unit.
Background
Bridge arms of the MMC flexible direct-current transmission converter valve, a cascade reactive power compensation device, a cascade active filter device, an inversion unit of a cascade high-voltage frequency conversion device and a main loop structure of a chopping unit of a cascade direct-current power supply device are all formed by connecting a plurality of power units in series, and the main loop structure comprises a certain number of redundant power units. In order to ensure the reliable operation of the equipment, a certain power unit of the cascade structure is required to be capable of triggering the closing of the bypass contactor after the fault occurs, and the normal operation of the whole equipment is not influenced by the power unit with the fault bypass. When the uplink communication from the power unit to the control system is interrupted, the control system determines the important information of the state of the bypass contactor of the power unit, which becomes a difficult problem.
Disclosure of Invention
To solve the problems described in the background, the present invention provides a bypass status loop reporting method and topology for a power unit. The method has the characteristics of high reliability of reporting important information, flexible application and the like. According to the power unit bypass state circulation reporting method, two or more power units can be circularly interconnected through optical fibers, information interaction of bypass contactor states can be achieved through the optical fibers, and the states of the bypass contactors in an open state or a closed state can be reported to adjacent power units through the optical fibers. After the uplink communication optical fiber from the power unit to the control system is disconnected, the control system can judge the state of the bypass contactor of the power unit through the adjacent power unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bypass state cycle reporting method of a power unit is suitable for a topological structure of two or more power units, and a bypass device of the power unit comprises a bypass contactor, a bypass trigger circuit and a unit control circuit; the method comprises the following steps:
step one, the following ports are arranged in a bypass trigger circuit of each power unit: the bypass trigger input signal port, the bypass contactor state signal output port reported to the power unit and the bypass contactor state signal output port reported to the adjacent power unit;
step two, the following ports are arranged in the unit control circuit of each power unit: an uplink optical fiber port from a unit control circuit to a main controller, a downlink optical fiber interface from the main controller to the unit control circuit, a bypass trigger output signal port, a state signal input port of a bypass contactor of the power unit and a state signal optical fiber input port of a bypass contactor of an adjacent power unit;
step three, connecting a bypass trigger input signal port of a bypass trigger circuit of each power unit and a bypass contactor state signal output port reported to the power unit with a bypass trigger output signal port of a unit control circuit and a bypass contactor state signal input port of the power unit respectively;
step four, reporting the bypass trigger circuit of each power unit to a bypass contactor state signal output port of an adjacent power unit to be connected with a bypass contactor state signal optical fiber input port of the adjacent power unit of a unit control circuit of the adjacent power unit;
step five, when an uplink communication channel from a unit control circuit of a single power unit to the main controller is disconnected due to a fault, the fault power unit cannot directly report the state of the bypass contactor to the main controller; at this time, the following processes are performed:
1) a unit control circuit of the fault power unit sends a bypass trigger signal to a bypass contactor bypass trigger signal input port of a bypass trigger circuit through a bypass trigger signal output port to trigger a bypass contactor to be closed;
2) after the state of the auxiliary contact of the bypass contactor of the fault power unit is turned over, the state signal output port of the bypass contactor of the bypass trigger circuit reports the state signal to the unit control circuit of the adjacent power unit;
3) the unit control circuit of the adjacent power unit reports the state of the bypass contactor of the fault power unit to the main controller through the uplink optical fiber port of the unit control circuit and the uplink optical fiber port of the main controller;
4) and after the main controller receives the closed state information of the bypass contactor of the fault power unit, controlling other power units to continue to operate.
A power unit bypass topology structure of a bypass state loop reporting method of a power unit, wherein the power unit comprises a plurality of power units, and a bypass device of the power unit comprises a bypass contactor, a bypass trigger circuit and a unit control circuit.
The following ports are arranged in the bypass trigger circuit of each power unit: the bypass trigger input signal port, the bypass contactor state signal output port reported to the power unit, and the bypass contactor state signal output port reported to the adjacent power unit.
The following ports are arranged in the unit control circuit of each power unit: the unit control circuit comprises an uplink optical fiber port from the unit control circuit to the main controller, a downlink optical fiber port from the main controller to the unit control circuit, a bypass trigger output signal port, a state signal input port of a bypass contactor of the power unit and a state signal optical fiber input port of a bypass contactor of an adjacent power unit.
And the bypass trigger input signal port of the bypass trigger circuit of each power unit and the bypass contactor state signal output port reported to the power unit are respectively connected with the bypass trigger output signal port of the unit control circuit and the bypass contactor state signal input port of the power unit.
Meanwhile, the bypass contactor state signal output port of the bypass trigger circuit of each power unit, which reports to the adjacent power unit, is connected with the adjacent power unit bypass contactor state signal optical fiber input port of the unit control circuit of the adjacent power unit.
And the bypass contactor state signal output port of the bypass trigger circuit of the last power unit, which reports to the adjacent power unit, is connected with the adjacent power unit bypass contactor state signal optical fiber input port of the unit control circuit of the first power unit.
The uplink optical fiber port from the unit control circuit to the main controller and the downlink optical fiber port from the main controller to the unit control circuit of each power unit are connected with the main controller.
The bypass trigger circuit of each power unit triggers the bypass contactor of the unit and detects the state of the auxiliary contact of the bypass contactor at the same time.
Compared with the prior art, the invention has the beneficial effects that:
1) the power unit bypass state circular reporting method provided by the invention can respectively report the state information of the bypass contactor to the power unit and the adjacent power units, thereby improving the reliability of the reporting of the state information of the important bypass contactor.
2) The power unit bypass state cycle reporting method provided by the invention can be applied to two or more power units, the number has no upper limit, and the application mode is flexible.
Drawings
FIG. 1 is a diagram of a two power cell based implementation of the power cell bypass status loop reporting method of the present invention;
FIG. 2 is a schematic diagram of an external interface of a cell control circuit of a power cell in the power cell bypass state loop reporting method of the present invention;
FIG. 3 is a schematic diagram of an external interface of a bypass trigger circuit of a power cell in the power cell bypass status loop reporting method of the present invention;
FIG. 4 is a diagram of a three power cell based implementation of the power cell bypass status loop reporting method of the present invention;
fig. 5 is a diagram of an implementation method based on four power cells for the power cell bypass state loop reporting method of the present invention.
In the figure, 1-bypass contactor trigger coil 2-bypass contactor auxiliary contact 3-bypass contactor bypass trigger signal input port 4-bypass contactor status signal output port (reported to the present power unit) 5-bypass contactor status signal output port (reported to the adjacent power unit) 6-bypass contactor status signal input port (from the adjacent power unit) 7-bypass trigger signal output port 8-bypass contactor status signal input port (from the present power unit) 9-unit control circuit uplink optical fiber port 10-unit control circuit downlink optical fiber port 11-main controller uplink optical fiber port 12-main controller downlink optical fiber port.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1-5, a bypass status loop reporting method for a power unit is applicable to a topology of two or more power units, and a bypass device of the power unit includes a bypass contactor, a bypass trigger circuit and a unit control circuit.
Fig. 1, 4 and 5 are schematic diagrams of embodiments of 2 power units, 3 power units and 4 power units, respectively. Fig. 1 to 5 are converter valve power units for MMC flexible dc power transmission as an example, and a main controller described in the following is a converter valve controller in the figure, and if the converter valve power units are cascaded reactive power compensation devices, cascaded active power filter devices, cascaded high-voltage frequency conversion devices, or cascaded dc power supply devices, the main controller is a main controller of the cascaded reactive power compensation devices, the cascaded active power filter devices, the cascaded high-voltage frequency conversion devices, or the cascaded dc power supply devices. Besides, the power units of the device have the same bypass structure.
As shown in fig. 1-5, the method comprises the steps of:
step one, the following ports are arranged in a bypass trigger circuit of each power unit: a bypass trigger input signal port 3, a bypass contactor state signal output port 4 reported to the power unit, and a bypass contactor state signal output port 5 reported to an adjacent power unit;
step two, the following ports are arranged in the unit control circuit of each power unit: a bypass trigger output signal port 7, a bypass contactor state signal input port 8 of the power unit, a bypass contactor state signal optical fiber input port 6 of an adjacent power unit, an uplink optical fiber port 9 from a unit control circuit to a main controller, and a downlink optical fiber port 10 from the main controller to the unit control circuit;
step three, connecting a bypass trigger input signal port 3 of a bypass trigger circuit of each power unit and a bypass contactor state signal output port 4 reported to the power unit with a bypass trigger output signal port 7 of a unit control circuit and a bypass contactor state signal input port 8 of the power unit respectively;
step four, reporting the bypass trigger circuit of each power unit to a bypass contactor state signal output port 5 of an adjacent power unit to be connected with a bypass contactor state signal optical fiber input port 6 of the adjacent power unit of a unit control circuit of the adjacent power unit;
step five,
1. When all the power units and the converter valve controller work normally, the bypass contactors of all the power units are in an off state;
2. when the uplink communication path from the unit control circuit of a single power unit to the main controller is disconnected due to a fault, the fault causes include: power supply problems, unit control circuit uplink optical fiber port 9 problems, converter valve controller uplink optical fiber port 11 problems, optical fibers and the like. The faulty power cell cannot directly report the bypass contactor status to the converter valve controller. The fault power unit cannot directly report the state of the bypass contactor to the main controller; taking the #1 power unit in fig. 1 as a fault power unit, the following processing is performed at this time:
(1) the 1# power unit control circuit sends a bypass trigger signal to a bypass contactor bypass trigger signal input port 3 of a bypass trigger circuit through a bypass trigger signal output port 7 to trigger the bypass contactor to be closed;
(2) after the state of the auxiliary contact of the bypass contactor of the 1# power unit is inverted, the state signal output port 5 of the bypass contactor of the bypass trigger circuit reports the state signal to the unit control circuit of the adjacent 2# power unit;
(3) the unit control circuit of the No. 2 power unit reports the state of the bypass contactor of the No. 1 power unit to the converter valve controller through an uplink optical fiber port 9 of the unit control circuit and an uplink optical fiber port 11 of the converter valve controller;
(4) and after the converter valve controller receives the closed state information of the bypass contactor of the 1# power unit, controlling other power units to continue to operate.
As shown in fig. 1 to 5, the power unit bypass topology designed according to the above bypass state loop reporting method for a power unit includes a plurality of power units, and the bypass device of the power unit includes a bypass contactor, a bypass trigger circuit, and a unit control circuit. The topological structure is a connecting structure as follows:
1) the bypass trigger circuit of each power unit is connected with the trigger coil 1 of the bypass contactor of the unit to trigger the bypass contactor and detect the state of the auxiliary contact 2 of the bypass contactor;
2) the following ports are arranged in the bypass trigger circuit of each power unit: a bypass trigger input signal port 3, a bypass contactor state signal output port 4 reported to the power unit, and a bypass contactor state signal output port 5 reported to an adjacent power unit;
3) the following ports are arranged in the unit control circuit of each power unit: an uplink optical fiber port 9 from a unit control circuit to a main controller, a downlink optical fiber interface 10 from the main controller to the unit control circuit, a bypass trigger output signal port 7, a bypass contactor state signal input port 8 of the power unit and a bypass contactor state signal optical fiber input port 6 of an adjacent power unit;
4) a bypass trigger input signal port 3 of a bypass trigger circuit of each power unit and a bypass contactor state signal output port 4 reported to the power unit are respectively connected with a bypass trigger output signal port 7 of a unit control circuit and a bypass contactor state signal input port 8 of the power unit;
5) meanwhile, the bypass contactor state signal output port 5 of the bypass trigger circuit of each power unit, which reports to the adjacent power unit, is connected with the bypass contactor state signal optical fiber input port 6 of the adjacent power unit of the unit control circuit of the adjacent power unit;
6) the bypass contactor state signal output port 5 of the adjacent power unit reported by the bypass trigger circuit of the bypass device of the last power unit is connected with the bypass contactor state signal optical fiber input port 6 of the adjacent power unit of the unit control circuit of the first power unit;
7) the uplink optical fiber port 9 from the unit control circuit to the main controller of each power unit is connected with the uplink optical fiber port 11 of the main controller, and the downlink optical fiber port 10 from the main controller to the unit control circuit is connected with the downlink optical fiber port 12 of the main controller.
It should be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and not intended to limit the invention, although the present invention has been disclosed in the form of the following detailed description, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims, which are intended to cover all such modifications and equivalents as fall within the true spirit and scope of the invention as defined by the appended claims and their equivalents, including the method of reporting bypass status of power cells based on three power cells in FIG. 4, the method of reporting bypass status of power cells based on four power cells in FIG. 5, the number of power cells in FIG. 5, or the adjustment of the direction of circulation, and the like, Equivalent changes and modifications still fall within the technical scope of the invention.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (4)
1. A method for circulation bypass triggering and circulation state reporting of a power unit is characterized in that the method is applicable to a topological structure of two or more power units, and a bypass device of the power unit comprises a bypass contactor, a bypass triggering circuit and a unit control circuit; the method comprises the following steps:
step one, the following ports are arranged in a bypass trigger circuit of each power unit: a bypass trigger input signal port from the power unit, a bypass contactor state signal output port reported to the power unit, and a bypass contactor state signal output port reported to an adjacent power unit;
step two, the following ports are arranged in the unit control circuit of each power unit: the unit control circuit is to the last optic fibre port of main control unit, main control unit to the down optic fibre port of unit control circuit, be used for controlling this power unit's bypass trigger output signal port, this power unit bypass contactor state signal input port, in addition: the adjacent power units bypass the contactor state signal optical fiber input port;
step three, the bypass trigger input signal port from the power unit of the bypass trigger circuit of each power unit and the bypass contactor state signal output port reported to the power unit are respectively connected with the bypass trigger output signal port used for controlling the power unit of the unit control circuit and the bypass contactor state signal input port of the power unit;
step four, reporting the bypass trigger circuit of each power unit to a bypass contactor state signal output port of an adjacent power unit to be connected with a bypass contactor state signal optical fiber input port of the adjacent power unit of a unit control circuit of the adjacent power unit;
step five, when the unit control circuit of a single power unit breaks down, the fault power unit cannot directly report the state of the bypass contactor to the main controller; at this time, the following processes are performed:
1) after the state of the auxiliary contact of the bypass contactor of the fault power unit is turned over, the state signal output port of the bypass contactor of the adjacent power unit, which is reported by the bypass trigger circuit of the fault power unit, reports the state signal to the unit control circuit of the adjacent power unit;
2) the unit control circuit of the adjacent power unit reports the state of the bypass contactor of the fault power unit to the main controller through the uplink optical fiber port of the unit control circuit and the uplink optical fiber port of the main controller;
3) and after the main controller receives the state information of the closed bypass contactor of the fault power unit, controlling other power units to continue to operate.
2. The method of claim 1, wherein the bypass contactor status signal output port of the bypass trigger circuit of the last power unit reporting to the adjacent power unit is connected to the adjacent power unit bypass contactor status signal fiber input port of the unit control circuit of the first power unit.
3. The method of claim 1, wherein the upstream fiber port of the cell control circuit to the main controller and the downstream fiber port of the main controller to the cell control circuit of each power cell are connected to the main controller.
4. The method as claimed in claim 1, wherein the bypass trigger circuit of each power unit triggers the bypass contactor of the power unit, and detects the state of the auxiliary contact of the bypass contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910752679.2A CN110474299B (en) | 2019-08-15 | 2019-08-15 | Bypass state cycle reporting method and topology structure of power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910752679.2A CN110474299B (en) | 2019-08-15 | 2019-08-15 | Bypass state cycle reporting method and topology structure of power unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110474299A CN110474299A (en) | 2019-11-19 |
| CN110474299B true CN110474299B (en) | 2022-04-15 |
Family
ID=68511354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910752679.2A Active CN110474299B (en) | 2019-08-15 | 2019-08-15 | Bypass state cycle reporting method and topology structure of power unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110474299B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371663A (en) * | 2020-03-03 | 2020-07-03 | 南京南瑞继保电气有限公司 | Ring network communication system and communication method for multi-level converter control system |
| CN115912652B (en) * | 2022-12-01 | 2024-04-02 | 中国南方电网有限责任公司超高压输电公司广州局 | Power module protection method, device, computer equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN104953806A (en) * | 2014-08-23 | 2015-09-30 | 希望森兰科技股份有限公司 | Power-consumption-free bypass apparatus of cascaded-power-unit-based high-voltage inverter and control method thereof |
| CN105119478A (en) * | 2015-09-30 | 2015-12-02 | 苏州英威腾电力电子有限公司 | Bypass contactor control panel of power unit |
| CN205265521U (en) * | 2015-12-23 | 2016-05-25 | 苏州汇川技术有限公司 | Unit cascades type high -voltage inverter |
| CN107171537A (en) * | 2017-06-29 | 2017-09-15 | 上海电气富士电机电气技术有限公司 | The Bypass Control System and high-voltage frequency conversion and speed-adjusting device of a kind of power cell |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006004339A1 (en) * | 2006-01-30 | 2007-08-02 | Robert Bosch Gmbh | Redundant communication network |
-
2019
- 2019-08-15 CN CN201910752679.2A patent/CN110474299B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN104953806A (en) * | 2014-08-23 | 2015-09-30 | 希望森兰科技股份有限公司 | Power-consumption-free bypass apparatus of cascaded-power-unit-based high-voltage inverter and control method thereof |
| CN105119478A (en) * | 2015-09-30 | 2015-12-02 | 苏州英威腾电力电子有限公司 | Bypass contactor control panel of power unit |
| CN205265521U (en) * | 2015-12-23 | 2016-05-25 | 苏州汇川技术有限公司 | Unit cascades type high -voltage inverter |
| CN107171537A (en) * | 2017-06-29 | 2017-09-15 | 上海电气富士电机电气技术有限公司 | The Bypass Control System and high-voltage frequency conversion and speed-adjusting device of a kind of power cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110474299A (en) | 2019-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111049367B (en) | Reliable bypass device and method for flexible direct current transmission power unit | |
| CN110474299B (en) | Bypass state cycle reporting method and topology structure of power unit | |
| CN111431147B (en) | Fault switching system and method for valve control system protection device of flexible direct current converter valve | |
| US20220137152A1 (en) | Storage battery monitoring system and method | |
| CN110137902B (en) | Circuit and method for preventing bypass switch of flexible direct current power module from closing | |
| CN111313555B (en) | Full-redundancy intelligent terminal device for intelligent substation | |
| CN108808714B (en) | High-voltage flexible direct-current transmission valve control protection system and protection control method | |
| CN108270479A (en) | A kind of light back board system and optical channel control method | |
| CN206133294U (en) | Controller fault protection system | |
| CN107623330B (en) | Control method of valve base control system | |
| CN111181190A (en) | Direct-current converter valve control system and switching control method and device thereof | |
| CN110854826B (en) | Fault diagnosis and processing method for two-out-of-three protection system of flexible direct converter valve | |
| CN109888756A (en) | A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method | |
| CN110954799A (en) | TBS valve bank thyristor level online state detection method in UPFC | |
| CN114336953B (en) | Control method of energy router, central controller and energy router | |
| CN107918430B (en) | Direct-current control protection device for realizing on-line maintenance of switching value loop | |
| CN103701201A (en) | System for blocking spare power automatic switching device during load shedding of power system safety and stability control device | |
| CN210222738U (en) | Interrupt reconnection quick response device and communication equipment | |
| CN108539864B (en) | Protection control system for distribution network converter station | |
| CN111459013A (en) | Switching system of submarine cable oil pump station equipment signal | |
| CN106200620B (en) | A kind of intelligent terminal outputs circuit self checking method and feedback circuit | |
| CN109407505B (en) | Redundancy measurement control system of direct current transmission valve bank and outlet control method and device thereof | |
| CN210093105U (en) | Unit bypass double-control topological structure of cascaded high-voltage frequency converter | |
| CN216751800U (en) | Network testing device with automatic switching terminal equipment function | |
| CN110932773A (en) | Data transmission control method in modular multilevel converter and related device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 114000 212 Yue Ling Road, Anshan, Liaoning Applicant after: Rongxin Huike Electric Co.,Ltd. Address before: 114000 212 Yue Ling Road, Anshan, Liaoning Applicant before: RONGXIN HUIKE ELECTRIC TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |