WO2021093403A1 - Système et procédé de commutation d'autorité de commande d'une station de conversion de courant continu haute tension multi-bornes en parallèle - Google Patents

Système et procédé de commutation d'autorité de commande d'une station de conversion de courant continu haute tension multi-bornes en parallèle Download PDF

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WO2021093403A1
WO2021093403A1 PCT/CN2020/110888 CN2020110888W WO2021093403A1 WO 2021093403 A1 WO2021093403 A1 WO 2021093403A1 CN 2020110888 W CN2020110888 W CN 2020110888W WO 2021093403 A1 WO2021093403 A1 WO 2021093403A1
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Prior art keywords
station
hvdc converter
control
level
converter station
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PCT/CN2020/110888
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English (en)
Chinese (zh)
Inventor
王胜
陈璐
吴庆范
刘旭辉
宋延涛
涂仁川
李乾
王亚涛
吴东崛
刘晨
王秋开
王长久
卢麒
范保丰
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许继电气股份有限公司
许继集团有限公司
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Priority claimed from CN201911101593.XA external-priority patent/CN110912171B/zh
Application filed by 许继电气股份有限公司, 许继集团有限公司 filed Critical 许继电气股份有限公司
Publication of WO2021093403A1 publication Critical patent/WO2021093403A1/fr

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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
    • 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]

Definitions

  • This application relates to the technical field of high-voltage direct current transmission, and in particular to a system and method for switching control authority of a parallel multi-terminal high-voltage direct current converter station.
  • the two-terminal HVDC transmission technology is the most mainstream and most mature technology of HVDC transmission. It has the advantages of large transmission capacity, good operation stability, and low system loss. It has an irreplaceable role in long-distance large-capacity transmission. With the increase in the number of DC transmission lines at both ends, the inflexible operation mode and the tight corridors of the transmission line tower base have become increasingly prominent.
  • Parallel multi-terminal HVDC transmission technology provides a new development direction for conventional DC transmission.
  • Parallel multi-terminal DC transmission The achievable multi-source power supply, multi-drop-point power reception, reduced transmission lines, more flexible operation methods, low investment costs and low operating costs have also become research hotspots in the field of DC transmission.
  • the parallel three-terminal HVDC project needs to realize the independent control function of the converter station on the equipment or system characteristics of the station according to different operating conditions, and realize the coordinated control function of all the converter stations.
  • the switching of the control authority of the station level and system level, system level master station and system level slave station of all converter stations puts forward more flexible and reliable requirements.
  • the three-terminal HVDC project usually switches the control authority according to the set rules, but in the actual project, a certain converter station may encounter failure or overhaul conditions, which causes the control authority switch of other converter stations to be unable to complete reliably ,
  • the control authority has poor operating flexibility, which affects the normal operation of the entire DC system.
  • the embodiment of the present application expects to provide a system and method for switching the control authority of a parallel multi-terminal HVDC converter station.
  • the embodiment of the application provides a parallel multi-terminal high-voltage direct current converter station control authority switching system
  • the system includes parallel N-terminal high-voltage direct current converter stations, N ⁇ 3, each end of the high-voltage direct current converter station is connected through a ring network communication ,
  • Each end of the HVDC converter station is configured to: when the local HVDC converter station needs to switch the control authority, it is judged whether the permission condition of the control authority switch request is met, and the permission condition of the control authority switch request at least includes: the local high voltage
  • the communication status between the DC converter station and at least the other end of the HVDC converter station is normal; if the conditions for the control authority switching request are met, the local HVDC converter station and other specific HVDC converter stations at each end will communicate with each other. Communication is used to realize the switching of control authority, and the specific HVDC converter station refers to the HVDC converter station with normal communication status with the local HVDC converter station.
  • the permission condition of the control authority switching request further includes: not receiving a system-level master station control authority request or a station-level control authority request sent by the HVDC converter station at each end.
  • each end of the HVDC converter station is also configured to detect the communication status with other end HVDC converter stations in real time, and when the local HVDC converter station is detected for the first time If the communication status with any other end of the HVDC converter station is abnormal, and the local HVDC converter station is not in the station-level control state, the current control state will be switched to the station-level control state.
  • each end of the HVDC converter station is further configured to: when it is detected that the communication status with the other ends of the HVDC converter station is not normal, then the local HVDC converter is blocked.
  • the system-level master station of the stream station controls the authority request function.
  • the mutual communication with other specific HVDC converter stations at each end to achieve control authority switching includes: when the local HVDC converter station is in the control state of the system-level slave station And when it needs to switch to the control state of the system-level master station, the local HVDC converter station sends the system-level master station control authority request to the specific HVDC converter stations at other ends; when the specific HVDC converter stations at other ends After the station receives the control authority request of the system-level master station, if its own control state is not the system-level slave station control state, it will convert its own control state to the system-level slave station control state; other specific high-voltage DC converter stations will change themselves Send the control status information to the local HVDC converter station; after the local HVDC converter station receives the control status information sent by other specific HVDC converter stations at each end, it switches the current control status to the system-level master station Control state.
  • the communication with other specific HVDC converter stations at each end to achieve control authority switching includes: when the local HVDC converter station is in a station-level control state and requires When switching to the control state of the system-level master station, the local HVDC converter station sends the system-level master station control authority request to the specific HVDC converter stations at other ends; when the specific HVDC converter stations at other ends receive After reaching the system-level master station control authority request, if its own control status is not the system-level slave station control status, then the own control status will be converted to the system-level slave station control status; other specific HVDC converter stations will control themselves The status information is sent to the local HVDC converter station; after the local HVDC converter station receives the control status information sent by other specific HVDC converter stations at each end, it switches the current control state to the system-level master station control state .
  • the mutual communication with other specific HVDC converter stations at each end to achieve control authority switching includes: when the local HVDC converter station is the system-level master station or slave When the station control status needs to be switched to the station-level control status, the local HVDC converter station sends a station-level control authority request to the specific HVDC converter stations at other ends; when the specific HVDC converter stations at other ends After receiving the station-level control authority request, if its own control state is not the station-level control state, it will convert its own control state to the station-level control state; other specific HVDC converter stations at each end will send their own control state information to the local HVDC converter station at the end; the HVDC converter station at the local end will switch the current control state to the station-level control state after receiving the control status information sent by the specific HVDC converter stations at each end.
  • the embodiment of the application also provides a method for switching the control authority of parallel multi-terminal HVDC converter stations, which is applied to the first HVDC converter station.
  • the system includes parallel N-terminal HVDC converter stations, N ⁇ 3; A HVDC converter station is either one of the N-terminal HVDC converter stations; each HVDC converter station is connected via ring network communication; the method includes:
  • the permission condition of the control authority switch request at least includes: the first HVDC converter station and other at least The communication status between the high-voltage DC converter stations at one end is normal; if the allowable conditions of the control authority switching request are met, it communicates with specific high-voltage DC converter stations at other ends to realize the control authority switching.
  • a converter station refers to a HVDC converter station with a normal communication status with the first HVDC converter station.
  • the permission condition of the control authority switching request further includes: not receiving a system-level master station control authority request or a station-level control authority request sent by the HVDC converter station at each end.
  • the method further includes: real-time detection of the communication status with other high-voltage DC converter stations at each end. If the communication state is abnormal, and the first high-voltage direct current converter station is not in the station-level control state, the current control state is switched to the station-level control state.
  • the method further includes: when it is detected that the communication status with the high-voltage direct current converter station at each end is abnormal, then the first high-voltage direct current converter station locks the original The system-level master station of the terminal controls the authority request function.
  • the mutual communication with other specific HVDC converter stations at each end to achieve control authority switching includes:
  • the first HVDC converter station receives the control state information sent by the specific HVDC converter station at each other end, and switches the current control state to the control state of the system-level master station; wherein, when the other ends After a specific HVDC converter station receives the system-level master station control authority request, if its own control state is not the system-level slave station control state, the other specific HVDC converter stations will convert their own control state to all
  • the system layer slave station controls the status, and sends its own control status information to the first HVDC converter station.
  • the mutual communication with other specific HVDC converter stations at each end to achieve control authority switching includes:
  • the first HVDC converter station receives the control state information sent by the specific HVDC converter station at each other end, and switches the current control state to the control state of the system-level master station; wherein, when the other ends After the specific HVDC converter station receives the system-level master station control authority request, if its own control state is not the system-level slave station control state, it will convert its own control state to the system-level slave station control state, and send it to the first The HVDC converter station sends its own control status information.
  • the mutual communication with other specific HVDC converter stations at each end to achieve control authority switching includes:
  • the first HVDC converter station receives the control state information sent by the specific HVDC converter station at each other end, and switches the current control state to the station-level control state; wherein, when the specific HVDC converter station at each other end After the HVDC converter station receives the station-level control authority request, if its own control state is not the station-level control state, the specific HVDC converter station at each end will convert its own control state to the station-level control state; and The first HVDC converter station sends its own control status information.
  • the HVDC converter station needs to switch the control authority, it is necessary to determine whether the permission condition of the control authority switching request is satisfied. Only when the permission condition is met, that is, at least the local HVDC converter station is guaranteed Only when the communication status with at least one end of the HVDC converter station is normal, the control authority can be switched, which avoids the inability to switch the control authority when the HVDC converter station stops operating due to factors such as maintenance, failure, etc., which will lead to the conversion of the converter station. The problem that the switching of the control authority cannot be completed reliably, which improves the flexibility of the control authority operation.
  • Fig. 1 is a bipolar topology structure of a parallel three-terminal DC transmission system according to an embodiment of the present application
  • Figure 2 is a network topology diagram of three-station control authority switching in an embodiment of the present application
  • FIG. 3 is a flowchart of selecting a method for switching control authority of a parallel multi-terminal HVDC converter station according to an embodiment of the present application
  • FIG. 4 is the logic for switching the control authority of the three-station system layer in an embodiment of the present application.
  • Fig. 5 is the logic for switching the control authority between the station layer and the system layer in an embodiment of the present application.
  • the embodiment of the application provides a parallel multi-terminal high-voltage direct current converter station control authority switching system, the system includes parallel N-terminal high-voltage direct current converter stations, N ⁇ 3, each end of the high-voltage direct current converter station is connected through a ring network communication , Each end of the HVDC converter station is configured to: when it is necessary to switch the control authority, it is judged whether the permission condition of the control authority switch request is satisfied.
  • the permission condition of the control authority switch request at least includes: the local HVDC converter station and other at least The communication status between the high-voltage DC converter stations at one end is normal; if the allowable conditions of the control authority switching request are met, it communicates with specific high-voltage DC converter stations at other ends to realize the control authority switching.
  • a converter station refers to a HVDC converter station with normal communication status with the local HVDC converter station.
  • the system includes three-terminal HVDC converter stations, which are respectively denoted as Station A, Station B and Station C.
  • the three-terminal HVDC converter stations are all in a bipolar topology and are connected by DC lines. Connected in parallel.
  • the three-terminal HVDC converter station can be configured as a rectifier station or an inverter station, but the system includes at least one rectifier station and one inverter station at any time, that is, at any time, the stations A, B, and C in the system It includes at least a rectifier station and an inverter station, and the third HVDC converter station can be a rectifier station or an inverter station.
  • each end of the HVDC converter station includes an operator control system and a DC station control system.
  • the operator control system and the DC station control system pass through the station's local area network. (LAN, Local Area Network) for communication, the operator control system issues a control authority request and release command to the local DC station control system; for example, the station A operator control system sends a control authority request to the station A DC station control system, Release and other control authority switching commands.
  • LAN Local Area Network
  • Each DC station control system realizes the switching function of the control authority of the three stations through the LAN communication between the dual loop sites; in addition, each DC station control system sends the current control authority status of the station to the station operator control system for display; for example, the station The A DC station control system sends the control authority status to the station A operator control system for the station A operator control system to display the control authority status.
  • the communication reliability of the entire system can be ensured by adopting dual-ring network communication.
  • station A preferentially receives data from station B through the inter-station communication between station A and station B. If the inter-station communication between station A and station B fails, it will switch to passing through station A and station C. Inter-station communication receives station B's data.
  • station A preferentially receives data from station C through the inter-station communication between station A and station C. If the inter-station communication between station A and station C fails, it will switch to the inter-station communication receiving station through station A and station B. C's data.
  • the selection principle of station B and station C receiving data from the opposite station is the same as that of station A, and will not be repeated here.
  • the converter station with the control authority is the system-level control master station
  • the converter station without the control authority is the system-level control slave station
  • each HVDC converter station does not have the control authority, it is the station-level control.
  • the system includes a three-terminal HVDC converter station as an example.
  • the control authority status of the three-terminal HVDC converter station includes: 1. One system master station controls and the other two system slave stations; 2. One System master station control, one system slave station control, one station level control; 3.
  • the three converter stations are all under station level control.
  • the converter station with control authority can realize the functions of system start and stop, power distribution, and three-station sequential control conversion of the three stations.
  • the system slave station or the station layer does not have the control functions such as system start and stop, power distribution, and sequential control conversion for other converter stations.
  • a parallel multi-terminal HVDC converter station control authority switching method can be realized. This method distinguishes that the communication between this station and the other two stations is faulty, and one of the stations is faulty.
  • the inter-station failure and the communication with the other two stations are normal in three inter-station communication states, which realizes the permission and switching function of different control authority switching functions. These functions satisfy the switching of the independent control mode and the joint control mode of the parallel three-terminal DC engineering converter station, as well as the control authority switching function of the other two normal communication stations for single station maintenance, and improve the flexibility of the parallel three-terminal HVDC system control And convenience.
  • the method of this embodiment is applied to a first HVDC converter station, and the first HVDC converter station is any one of the N-terminal HVDC converter stations; then, Methods include:
  • the permission condition of the control authority switch request at least includes: the first HVDC converter station and other at least The communication status between the HVDC converter stations at one end is normal;
  • the control authority switching request If the allowable condition of the control authority switching request is met, it communicates with other specific HVDC converter stations at each end to realize the control authority switching, and the specific HVDC converter station refers to the first HVDC converter station. HVDC converter station with normal communication status between stations.
  • the permission condition of the control authority switching request further includes: not receiving a system-level master station control authority request or a station-level control authority request sent by a high-voltage direct current converter station at each end.
  • the method further includes: real-time detection of the communication status with other high-voltage DC converter stations at each end. If the communication state between the two is abnormal, and the first HVDC converter station is not in the station-level control state, the current control state is switched to the station-level control state.
  • the method further includes: when it is detected that the communication status with other high-voltage DC converter stations is not normal , The first HVDC converter station blocks the control authority request function of the system-level master station at the local end.
  • the communication with other specific HVDC converter stations at each end to realize the control authority switching includes: when the first HVDC converter station is the system When the control state of the floor slave station needs to be switched to the control state of the system floor master station, the system-level master station control authority request is sent to the specific HVDC converter station at each end; the first HVDC converter station receives all According to the control status information sent by the specific HVDC converter station at each end, the current control state is switched to the control state of the system-level master station; wherein, when the specific HVDC converter station at each other end receives the system-level master station After the station control authority is requested, if its own control status is not the system-level slave station control status, the specific HVDC converter station at each end will convert its own control status to the system-level slave station control status, and send it to the system-level slave station control status.
  • the first HVDC converter station sends its own control status information.
  • the communication with other specific HVDC converter stations at each end to realize the control authority switching includes: when the first HVDC converter station is the station When the control state of the system layer needs to be switched to the control state of the system layer master station, the system layer master station control authority request is sent to the specific HVDC converter station at each end; the first HVDC converter station receives the other The control status information sent by the specific HVDC converter station at each end switches the current control state to the control state of the system-level master station; wherein, when the other specific HVDC converter stations at each end receive the system-level master station control After the permission request, if the own control state is not the system-level slave station control state, the own control state is converted to the system-level slave station control state, and the own control state information is sent to the first HVDC converter station.
  • the communication with other specific HVDC converter stations at each end to realize the control authority switching includes: when the first HVDC converter station is the system When the control state of the master station or the slave station on the floor and needs to be switched to the station-level control state, the station-level control authority request is sent to the specific high-voltage direct current converter station at each end; the first high-voltage direct current converter station receives the The control status information sent by the specific HVDC converter station at each other end switches the current control state to the station-level control state; wherein, when the specific HVDC converter station at each other end receives the station-level control authority request If its own control state is not the station-level control state, the specific HVDC converter station at each end will convert its own control state to the station-level control state; and send its own control to the first HVDC converter station status information.
  • the method may include: the local HVDC converter station (i.e. the first HVDC converter station) detects in real time the communication status between the local HVDC converter station and the other HVDC converter stations (i.e.
  • the control authority of the local terminal is Forcibly switch to station-level control, and lock the local system-level master station control authority request function; if the communication between the local terminal and the first end of the other two ends fails, the local control authority is forced to switch to station-level control , And open the control authority switching function between the local end and the second end of the other two ends; if the communication between the local end and the other two ends is normal, open the control authority switching between the local end and the other two ends Features.
  • the process of judging whether the communication between the local terminal and the other terminal is faulty may include: the communication link between the local station and the opposite station 1 is faulty, the communication link between the local station and the opposite station 2 is normal, and the local station receives the opposite station 2 and If the communication link failure signal of the opposite station 1 is signaled, it is judged that the communication between the local station and the opposite station 1 is faulty.
  • the method for judging communication failures between this station and station 2 is similar, so I won't go into details here.
  • control authority switching process between the local end and the second end of the other two ends is exactly the same as the control authority switching process between the local end and the other two ends, the communication between the local end and the other two ends is normal.
  • specific process of controlling authority switching is as follows:
  • Scenario 1 According to the switching logic of the three-station system-level control authority, as shown in Figure 4, when the HVDC converter station needs to switch the control authority, the HVDC converter station is the operating personnel control system of the system-level slave station control state Possess the authority to issue system-level master station control authority requests, and pass the request to the DC station control system of the other two HVDC converter stations through inter-station communication. After the HVDC converter station is in the control state of the system-level master station, the station control system receives the system-level master station control authority request for the station, and the operator control system of this station has the authority to issue the system-level master station control authority release command.
  • the DC station control system of this station After the DC station control system of this station receives the control authority release command, it forces the control status of the system-level master station of the station to the system-level slave control status, and transmits the information about the control status of the system-level slave station of the station to the other DC station control system for two converter stations. After the HVDC converter station that originally applied for the master station control authority request receives the system-level slave station control status information of the other two stations, it forces the system-level slave station control status of the station to switch to the system-level master station control status.
  • the control authority switching request permission condition is the control state of the system-level slave station, and the relationship between the local station and at least one other station The communication status between stations is normal, and there is no request for the control authority of the station or the system-level master station or station-level of the station.
  • the system-level master station control authority release permission condition is that the station is the system master station and a request for the system-level master station control authority of the station is received.
  • the effective waiting time for the system-level master station to switch the control authority can be 60 seconds. If the original system master station has not released the control authority or the original system slave station has not received the information of the control status of the system-level slave station of the opposite station 1 and the opposite station 2 for more than 60 seconds, the application for the system-level master station control authority switchover is invalid .
  • the above-mentioned effective waiting time may not be limited to 60 seconds, and it can be set by itself according to actual needs.
  • Case 2 All three stations are in the station-level control state, the converter station that first issued the system-level master station control authority request is switched to the system-level master station control state, and the other two converter stations are switched from the station-level control state to the system Layer slave control status.
  • the operator control system of the site issues a system-level master station control authority request, and passes the request through the inter-station
  • the communication is passed to the DC station control system of the other two HVDC converter stations.
  • the operator control systems of the other two HVDC converter stations have the authority to issue station-level control authority release commands. After their corresponding DC station control systems receive the station-level control authority release commands, their control status will be controlled by the station level.
  • the state is switched to the control state of the system-level slave station, and the information of the control state of the system-level slave station is sent to the local station. After receiving the system-level slave station control status information sent by other HVDC converter stations at each end, this station switches the station-level control status of the local HVDC converter station to the system-level master station control state.
  • the permission condition of the control authority switching request is the station-level control state of the station, and the station is in the station-level control state.
  • the inter-station communication status of an other station is normal, and there is no request for the control authority of this station or the system-level master station of the station.
  • the permission condition of the station-level control authority release command is that the station is in the station-level control state, and the system-level master station control authority request for the station is received.
  • Case 3 According to the switching logic of the three-station station-level and system-level control authority, as shown in Figure 5, both the system master station and the system slave station have the authority to issue station-level control authority requests.
  • the operator control system of a HVDC converter station issues a station-level control authority request, it transmits the request to the DC station control systems of the other two HVDC converter stations.
  • the operator control systems of the other two HVDC converter stations have the authority to issue system-level control authority release commands. After their corresponding DC station control systems receive the system-level control authority release commands, their control status is controlled by the system level.
  • the status (system-level slave station control status or system-level master station control status) is switched to the station-level control status, and the information of the station-level control status is sent to the DC station control system of the station. After receiving the information of the station-level control status of the other two stations, this station switches the control authority status to the station-level control status.
  • the permission condition of the control authority switching request is the master station or slave station at the system level, and this station is at least one of the other
  • the station-to-station communication is normal, and there is no system-level master station or station-level control authority request command for this station or the opposite station.
  • the permission condition of the system-level control authority release command is that the station is the system master or slave station, and the station-level control authority request for the station is received.
  • the effective waiting time for switching from the system-level control state to the station-level control state is 60 seconds. If more than 60 seconds, the other two converter stations have not released the system-level control authority, or the converter station that originally requested to switch to station-level control does not receive the station-level control status information of the opposite station 1 and the opposite station 2, then the station The application for level control authority is invalid.
  • the above-mentioned parallel multi-terminal high-voltage direct current converter station control authority switching system is illustrated by taking a three-terminal high-voltage direct current converter station as an example. As other implementations, it can also be a four-terminal, five-terminal and other multi-terminal high voltage DC converter station.
  • the parallel multi-terminal HVDC converter station control authority switching system of the embodiment of the application can realize the switching function of the control authority of the three-station station layer and the system layer, the system-level master station and the system-level slave station. Independent control and joint control of substation converter station. Through the dual-ring network communication scheme between the three stations, it is ensured that when the communication between any two stations fails, the switching function of the control authority of the three stations can still be realized, thereby improving the stable operation of the direct transmission system.
  • the embodiments of the present application are not only applicable to practical engineering applications of parallel three-terminal HVDC power transmission systems and hybrid three-terminal HVDC power transmission systems, but also have guiding significance for the switching of control authority of multi-terminal HVDC power transmission.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in the embodiment of the present application are implemented.
  • the disclosed system and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, such as: multiple units or components can be combined, or It can be integrated into another system, or some features can be ignored or not implemented.
  • the coupling, or direct coupling, or communication connection between the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the functional units in the embodiments of the present application can be all integrated into one processing unit, or each unit can be individually used as a unit, or two or more units can be integrated into one unit;
  • the unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.
  • a person of ordinary skill in the art can understand that all or part of the steps in the above method embodiments can be implemented by a program instructing relevant hardware.
  • the foregoing program can be stored in a computer readable storage medium. When the program is executed, it is executed. Including the steps of the foregoing method embodiment; and the foregoing storage medium includes: removable storage devices, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks, etc.
  • ROM read-only memory
  • RAM Random Access Memory
  • magnetic disks or optical disks etc.
  • the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer readable storage medium.
  • the computer software product is stored in a storage medium and includes several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: removable storage devices, ROM, RAM, magnetic disks, or optical disks and other media that can store program codes.

Abstract

L'invention concerne un système et un procédé de commutation d'autorité de commande d'une station de conversion de courant continu haute tension multi-bornes en parallèle. Le procédé comprend : lorsqu'une première station de conversion de courant continu haute tension doit commuter l'autorité de commande, il est déterminé si une condition d'autorisation d'une demande de commutation d'autorité de commande est satisfaite, la condition d'autorisation de la demande de commutation d'autorité de commande comprenant au moins : l'état de communication entre la première station de conversion de courant continu haute tension et d'autres stations de conversion de courant continu haute tension au niveau d'au moins une borne est normal ; si la condition d'autorisation de la demande de commutation d'autorité de commande est satisfaite, la première station de conversion de courant continu haute tension communique avec des stations de conversion de courant continu haute tension spécifiques au niveau d'autres bornes afin de réaliser la commutation d'autorité de commande, la station de conversion de courant continu haute tension spécifique étant une station de conversion de courant continu haute tension présentant un état de communication normal avec la première station de conversion de courant continu haute tension.
PCT/CN2020/110888 2019-11-12 2020-08-24 Système et procédé de commutation d'autorité de commande d'une station de conversion de courant continu haute tension multi-bornes en parallèle WO2021093403A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102969733A (zh) * 2012-11-08 2013-03-13 南京南瑞继保电气有限公司 一种多端柔性直流输电系统协调控制方法
US20150171615A1 (en) * 2013-12-18 2015-06-18 Pwm Drives Limited Breaker circuit configurations for multi-terminal DC systems
CN106331091A (zh) * 2016-08-23 2017-01-11 南京南瑞继保电气有限公司 一种直流站间通信切换方法
CN106684902A (zh) * 2017-01-16 2017-05-17 许继集团有限公司 柔性直流电网的换流站及多换流站协调控制方法
CN110912171A (zh) * 2019-11-12 2020-03-24 许继电气股份有限公司 一种并联多端高压直流换流站控制权限切换系统及方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102969733A (zh) * 2012-11-08 2013-03-13 南京南瑞继保电气有限公司 一种多端柔性直流输电系统协调控制方法
US20150171615A1 (en) * 2013-12-18 2015-06-18 Pwm Drives Limited Breaker circuit configurations for multi-terminal DC systems
CN106331091A (zh) * 2016-08-23 2017-01-11 南京南瑞继保电气有限公司 一种直流站间通信切换方法
CN106684902A (zh) * 2017-01-16 2017-05-17 许继集团有限公司 柔性直流电网的换流站及多换流站协调控制方法
CN110912171A (zh) * 2019-11-12 2020-03-24 许继电气股份有限公司 一种并联多端高压直流换流站控制权限切换系统及方法

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