WO2022028487A1 - 分布式串联补偿器的控制保护系统 - Google Patents

分布式串联补偿器的控制保护系统 Download PDF

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Publication number
WO2022028487A1
WO2022028487A1 PCT/CN2021/110604 CN2021110604W WO2022028487A1 WO 2022028487 A1 WO2022028487 A1 WO 2022028487A1 CN 2021110604 W CN2021110604 W CN 2021110604W WO 2022028487 A1 WO2022028487 A1 WO 2022028487A1
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Prior art keywords
control
protection
module
centralized
layer
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PCT/CN2021/110604
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English (en)
French (fr)
Inventor
潘磊
董云龙
卢宇
林艺哲
常昊添
张宝顺
黄如海
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Priority to DE112021002393.4T priority Critical patent/DE112021002393B4/de
Priority to BR112022025269-2A priority patent/BR112022025269B1/pt
Publication of WO2022028487A1 publication Critical patent/WO2022028487A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators, e.g. thyristor-controlled series capacitors [TCSC]
    • H02J3/1814—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators, e.g. thyristor-controlled series capacitors [TCSC] having reactive elements actively controlled by bridge converters, e.g. unified power flow controllers [UPFC] or controlled series voltage compensators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J3/04—Arrangements for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling the transfer of power between connected networks; Controlling load sharing between connected networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
    • H02J13/14—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network the power network being locally controlled, e.g. home energy management systems [HEMS]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators, e.g. thyristor-controlled series capacitors [TCSC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
    • H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
    • H02J13/1321—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using a wired telecommunication network or a data transmission bus
    • H02J13/1323—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using a wired telecommunication network or a data transmission bus using optical fibres
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
    • H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
    • H02J13/1331—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using wireless data transmission
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Definitions

  • the present application relates to the field of flexible power transmission in power systems, and in particular, to a control and protection system for distributed series compensators.
  • each small-capacity compensator can be made lightweight and directly distributed on the power line to realize the power flow control function and effect similar to the static synchronous series compensator, thus providing more flexibility for smart grid. , More advanced control methods, effectively improve the power supply capacity and safety and stability of the power system.
  • the distributed series compensator has the characteristics of small size and light weight. A large number of distributed sub-units ensure the redundancy of the equipment, thereby improving the reliability of the device.
  • the Distributed Power Flow Controller (DPFC) devices can be dispersedly deployed on transmission lines or substations, occupying a small area.
  • DPFC Distributed Power Flow Controller
  • distributed series compensator distributed static synchronous series compensator
  • the control and protection systems of the two projects are relatively simple, and both use the module local control mode.
  • the control mode of this mode is inflexible, and the performance of power flow regulation is poor.
  • Some universities and research institutes in China have carried out a variety of research projects on distributed series compensators (distributed series reactors, distributed static synchronous series compensators, distributed power flow controllers, etc.) , simulation modeling and control strategy, and there is no report on the structure and functional configuration of the control and protection system of the distributed power flow controller.
  • the patent "A Control Method of Distributed Series-Coupled Power Flow Controller” proposes a control method of a distributed series-coupled power flow controller, including three-layer control strategies, namely, the transient blocking strategy and the remote power flow total control strategy. and trend control strategies.
  • the highest priority control strategy "transient blocking strategy” and the lowest control strategy “power flow automatic control strategy” are implemented by local modules.
  • the second priority control strategy "remote power flow master control strategy” is implemented by the remote dispatch master console. This method classifies the control strategy of the distributed power flow controller according to the priority of the control or action of the actual control protection, but it is not hierarchical, so when there are many control strategies, there are many levels, which is not conducive to understanding and application.
  • the patent "A Distributed Series Coupled Power Flow Controller Protection Device and Method” proposes a method of modifying the fault current protection setting to adapt to the fault protection requirements of power grid lines in different planning periods, and proposes the configuration of the protection device.
  • the patent does not mention the layered structure and configuration of the control protection system.
  • the patent "A Distributed Power Flow Control System and Method” proposes a distributed power flow controller system, including a distributed power flow controller, a main controller and an energy management module.
  • the distributed power flow controller mainly collects the running data of the line and transmits its own state information to the main controller, and executes the corresponding working mode according to the adjustment instructions sent by the main controller.
  • the three parts of the control system are closely linked, and the distributed power flow controller cannot operate independently.
  • the paper "Research on the Strategy of Distributed Power Flow Controller Based on Centralized Control” proposes that the distributed power flow controller is implemented by means of distributed installation and master-slave control, and is composed of sub-control units and master controllers.
  • the main controller is installed in the substation and controls all sub-units in a centralized manner.
  • a wireless communication network is constructed between several sub-control units of the system and a main controller to exchange data.
  • the paper proposes the main controller of DPFC to realize the system-level control strategy, and determines the running state and output capacity of the DPFC subunits on the line according to the system power flow regulation target and compensation mode set by the operator.
  • the main control unit in the control and protection system proposed in this paper determines the running state and output capacity of each subunit. Since the line state is always changing, the control and protection system described in this paper needs to be iteratively put into sub-module units, resulting in a slow control response time.
  • Each exemplary embodiment of the present application provides a control and protection system for a distributed series compensator, which adopts a hierarchical arrangement and hierarchical control method, has a clear structure, can realize independent operation of distributed modules and centralized coordinated control and protection, and improves the overall The operating performance and reliability of the system are suitable for engineering applications.
  • a control and protection system for a distributed series compensator is proposed.
  • the distributed series compensator is composed of N local series compensation modules distributed in series on the line, or arranged in series in a substation in a centralized manner, where N is a natural number, and N is greater than 1;
  • the control and protection system includes: a remote dispatching control layer, so
  • the remote dispatching control layer adopts hierarchical arrangement and hierarchical control, and the remote dispatching control layer is configured to obtain the optimal adjustment of the power flow of the power grid by the distributed series compensator according to the real-time operating state of the AC power grid.
  • the optimal line power command or the power control command curve is obtained according to the real-time operating state of the power grid and the load prediction result; the centralized control protection layer in the station, the centralized control protection layer in the station is configured to receive the first power command or obtain the second power command, Convert the first power command or the second power command into the first injection voltage command of each of the on-site series compensation modules, and coordinately control and centrally protect each of the on-site series compensation modules.
  • the on-site module control layer includes: a module control protection layer, the module control protection layer includes a control protection unit, and the module control protection layer is configured to receive the information sent by the centralized control protection layer in the station.
  • the first injection voltage command or the preset second injection voltage command is obtained, and the control and protection unit is configured to synthesize the first injection voltage command or the second injection voltage command to generate the in-situ series connection an output voltage command of a compensation module; and a module valve base control layer configured to convert the output voltage command of the in-place series compensation module into a voltage for use within the in-place series compensation module Turn-on or turn-off commands for power electronics.
  • the centralized control and protection layer in the station includes: a coordinated control unit, a three-phase voltage unbalance control unit and a centralized protection unit of each of the on-site series compensation modules; wherein, each of the on-site series compensation modules
  • the coordinated control unit is configured to realize the timing control of the input and withdrawal of each on-site series compensation module and the distribution of the first injection voltage command;
  • the three-phase voltage unbalance control unit is configured as a three-phase balanced line voltage;
  • the centralized protection unit of each on-site series compensation module is configured to protect all the on-site series compensation modules when the AC system fails, and cooperate with the AC system protection.
  • the coordinated control unit and the centralized protection unit are integrated into one device.
  • the coordinated control unit, the three-phase voltage unbalance control unit and the centralized protection unit are integrated into one device.
  • the centralized control protection layer in the station includes a line overload control unit, and the line overload control unit is configured to be configured when the line current of the line to which the distributed series compensator is connected or the line current of the adjacent line exceeds a predetermined value.
  • the first injection voltage command sent to the control layer of each local module is adjusted to control the line current within the set value.
  • the centralized control and protection layer in the station is configured with two sets of centralized control and protection devices with the same function, and the two sets of centralized control and protection devices both include a main system and a backup system for realizing the two sets of devices.
  • a coordination control unit for selecting functions, the host system is configured to preferentially execute instructions transmitted to the module control protection layer.
  • control protection unit of the module control protection layer includes: a DC voltage control unit, a line overload control unit, a voltage command limiting unit and an overcurrent protection unit; wherein the DC voltage control unit is configured as Stabilize the capacitor voltage of the on-site series compensation module; the line overload control unit is configured to control the current of the line connected to the distributed series compensator within a set value; and the overcurrent protection unit is used to avoid The on-site series compensating module is subjected to an overcurrent impact to protect the safety of the on-site series compensating module.
  • the DC voltage control unit, the line overload control unit and the overcurrent protection sub-unit are integrated into one control board.
  • control and protection system is applied in a multi-circuit line.
  • the intra-station centralized control protection layer further includes a multi-circuit line power coordination control unit, and the coordination control unit is configured to assign a multi-circuit line power command.
  • all local series compensation modules in each circuit are configured with a set of centralized control equipment in the station, and the set of centralized control equipment in the station includes a coordination control unit and a centralized protection unit.
  • the remote dispatching control layer communicates with the in-station centralized control protection layer through optical fiber or network cable; and the in-station centralized control and protection layer and the local module control and protection layer communicate through wireless or optical fiber.
  • control and protection system of the distributed series compensator of the present application can realize the independent operation and centralized coordinated control and protection of the distributed modules, improve the operation performance and reliability of the overall system, and give better play to the distributed series compensator.
  • the advantage of optimizing system flow The control and protection system scheme of the above distributed series compensator adopts a layered arrangement, the system structure is clear and simple, the functions are comprehensive and cooperate with each other, and it is suitable for engineering applications.
  • FIG. 1 shows a structural diagram of a control and protection system of a distributed series compensator according to an embodiment of the present application.
  • FIG. 2 shows a structural diagram of a control and protection system of a distributed series compensator according to another embodiment of the present application.
  • FIG. 3 shows a structural diagram of a distributed series compensator system according to an embodiment of the present application.
  • FIG. 4 shows a structural diagram of a control and protection system of a distributed series compensator suitable for a double-circuit line application according to yet another embodiment of the present application.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments can be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals in the drawings denote the same or similar parts, and thus their repeated descriptions will be omitted.
  • FIG. 1 shows a structural diagram of a control and protection system of a distributed series compensator according to an embodiment of the present application.
  • FIG. 2 shows a structural diagram of a control and protection system of a distributed series compensator according to another embodiment of the present application.
  • FIG. 3 shows a structural diagram of a distributed series compensator system according to an embodiment of the present application.
  • the distributed series compensator is composed of N local series compensation modules 113 (Local Series Compensation Module) distributed in series on the line or centrally arranged in series in the substation, where N is a natural number, and N is greater than 1.
  • Each in-situ series compensation module 113 includes a voltage source converter 301 and a bypass device 303 .
  • the control and protection system of the distributed series compensator adopts a three-level arrangement and a four-level control and protection structure.
  • the three-level arrangement layer includes a remote scheduling control layer 103, a centralized control and protection layer 105 in the station, and a local module control layer.
  • the four control protection layers include the remote scheduling control layer 103, the centralized control protection layer 105 in the station, the module control protection layer 109 and the module valve base control layer 111, wherein the remote scheduling control layer 103 and the centralized control protection layer 105 in the station pass through the optical fiber Or network cables communicate with each other, and the centralized control protection layer 105 and the module control protection layer 109 in the station communicate with each other through wireless or optical fibers.
  • the three-level arrangement layer means that the three levels are placed in different places; the four-level control means that the control system is divided into four levels to realize.
  • the third-level arrangement is hardware, and the fourth-level control refers to software, wherein the software of the module control protection layer 109 and the module valve base control layer 111 are both arranged in the local unit module.
  • the remote dispatching control layer 103 is arranged in the remote power dispatching center, and the centralized control protection layer 105 in the station is arranged in the control and protection room of the distribution string series compensator.
  • the remote dispatch control layer 103 obtains the optimal line power command for the distributed series compensator to perform the optimal adjustment of the power flow of the power grid 101 according to the real-time operating status of the AC power grid 101 or according to the real-time operating status and load of the power grid 101
  • the prediction result obtains the power control command curve.
  • the power command refers to the target value to which the active power of the line needs to be adjusted by the distributed power flow controller.
  • the power control command curve refers to a curve formed by different line power commands (obtained according to the real-time operating state of the power grid 101 and the load prediction result) in different time periods.
  • the centralized control and protection layer 105 in the station converts the power command into the first injection voltage command of each on-site series compensation module 113 , and coordinates control and centralized protection of each on-site series compensation module 113 .
  • Coordinated control and centralized protection are mainly realized in the following ways: the coordinated control unit of each local series compensation module is configured to realize the timing control of the input and withdrawal of each local series compensation module and the distribution of the first injection voltage command; three-phase voltage The unbalanced control unit is configured to balance the three-phase voltage of the line; the centralized protection unit of each local series compensation module is configured to protect all local series compensation modules when the AC system fails, and cooperate with the AC system protection.
  • the line power command can be sent by the remote dispatch control layer 103 , or set or preset by the operator in the station according to the real-time operating state of the power grid 101 and the load prediction result.
  • the module control protection layer 109 receives the first injection voltage command sent by the centralized control protection layer 105 in the station or presets the second injection voltage command. The first injection voltage command and the second injection voltage command are controlled by the protection unit of the module control protection layer 109 After synthesis, the output voltage command of the local module is generated.
  • the module valve base control layer 111 converts the local module output voltage command into a turn-on or turn-off command of the power electronic devices in the local series compensation module 113 .
  • the centralized control protection layer 105 in the station includes, but is not limited to: a coordinated control unit of each on-site series compensation module 113 , a three-phase voltage unbalance control unit, and a centralized protection unit.
  • the coordination control unit of each local series compensation module 113 realizes the input and withdrawal of each local series compensation module 113 and the distribution of the injection voltage command.
  • the three-phase voltage unbalance control unit realizes the balance of the three-phase voltage of the line.
  • the centralized protection unit of each local series compensation module 113 realizes the protection of the local series compensation module when the AC system fails, and the coordination function with the protection of the AC system.
  • the aforementioned coordinated control unit, three-phase voltage unbalance control unit and centralized protection unit are integrated on one device.
  • the aforementioned coordinated control unit and centralized protection unit are integrated on one device.
  • the centralized control protection layer 105 in the station includes a line overload control unit.
  • the line overload control unit adjusts each local series compensation module.
  • the injection voltage command of 113, the control circuit current is within the set value.
  • control protection units of the module control protection layer 109 include, but are not limited to, a DC voltage control unit, a line overload control unit, a voltage command limiting unit, and an overcurrent protection unit.
  • the DC voltage control unit realizes the stability of the capacitor voltage of the on-site series compensation module
  • the line overload control unit can control the current of the line connected to the distributed series compensator within the set value
  • the over-current protection unit avoids on-site series compensation.
  • the module withstands the overcurrent impact, and protects the on-site series compensation module 113 safety.
  • the aforementioned DC voltage control subunit, line overload control unit, voltage command limiting unit and overcurrent protection subunit may be integrated into one control board.
  • the in-station centralized control protection layers 105 and 107 are configured with two sets of centralized control and protection systems with the same functions, and the functions of the two systems are respectively integrated into two devices, as shown in the figure for the in-station centralized control and protection systems Layer 105 and centralized control protection layer 107 in the station. Both systems include a coordinated control unit for realizing the selection function of the primary system and the backup system of the two systems. Commands transmitted by the host system to the module control protection layer 109 are preferentially executed. Both devices communicate with the remote scheduling control layer 103 and the module control protection layer 109 .
  • FIG. 4 shows a structural diagram of a control and protection system of a distributed series compensator suitable for a double-circuit line application according to yet another embodiment of the present application.
  • each local series compensation module 113 of each circuit line is configured with a set of centralized control devices in the station, including a coordinated control unit and a centralized protection unit.
  • the centralized control protection layer 105 in the station also includes a coordination control unit for the power of the multi-circuit lines, which realizes the distribution of the power commands of the multi-circuit lines.
  • Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory.
  • Volatile memory may include random access memory (RAM) or external cache memory.
  • RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Road (Synchlink), DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.
  • control and protection system of the distributed series compensator of the present application can realize the independent operation of the distributed modules and the centralized coordinated control and protection, improve the operation performance and reliability of the overall system, and better utilize the optimization of the distributed series compensator.
  • the advantages of system flow The control and protection system scheme of the above distributed series compensator adopts a layered arrangement, the system structure is clear and simple, the functions are comprehensive and cooperate with each other, and it is suitable for engineering applications.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

本申请提出一种分布式串联补偿器的控制保护系统，所述控制保护系统包括采用分级布置、分层控制的远端调度控制层、站内集中控制保护层、就地模块控制层；所述就地模块控制层包括模块控制保护层、模块阀基控制层。所述远端调度控制层根据交流电网的实时运行状态，得出功率指令；所述站内集中控制保护层接收所述功率指令并转化为各所述就地串联补偿模块的电压指令；所述模块控制保护层接收所述电压指令，输出就地串联补偿模块输出电压指令；所述模块阀基控制层将所述就地模块输出电压指令转化为所述就地模块控制层内电力电子器件的开通和关断命令。

Description

分布式串联补偿器的控制保护系统
相关申请
本申请要求于2020年8月6日提交中国专利局、申请号为202010782064.7、申请名称为“分布式串联补偿器的控制保护系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力系统中柔性输电领域，具体而言，涉及一种分布式串联补偿器的控制保护系统。
背景技术
随着大型电力系统的互联以及各种新设备的使用，在使发电、输电更经济、更高效的同时也增加了电力系统的规模和复杂度。此外，大量的分布式发电系统接入电网，使传统的固定由输电网向配电网传送的潮流发生逆向。用户负荷的不断增长需要潮流控制手段提高现有的功率输送能力。正在蓬勃发展的智能电网和电力市场间复杂的功率交换也需要频繁的潮流优化控制。
分布式串联补偿器，可以将每个小容量的补偿器制作轻巧得直接分布式地悬挂于电力线路上，实现和静止同步串联补偿器相近的电网潮流控制功能和效果，从而为智能电网提供更灵活、更先进的控制手段，有效提高电力系统的供电能力和安全稳定性。分布式串联补偿器具有体积小、重量轻等特点。大量分布式的子单元保障了设备的冗余性，进而提升了装置的可靠性。同时，分布式潮流控制器(Distributed Power Flow Controller，DPFC)装置可分散部署在输电线路上或者变电站，占地小。
目前全球已有两个分布式串联补偿器的示范工程(分布式静止同步串联补偿器)项目。两个项目的控制保护系统比较简单，均采用模块就地控制的模式。该模式控制方式不灵活，潮流调节的性能较差。中国有部分高校和科研院所开展了多种分布式串联补偿器(分布式串联电抗器、 分布式静止同步串联补偿器、分布式潮流控制器等)的研究项目，这些研究项目主要在拓扑结构、仿真建模和控制策略上开展研究，尚未有关于分布式潮流控制器的控制保护系统结构及功能配置的报告。
专利《一种分布式串联耦合潮流控制器的控制方法》，提出了一种分布式串联耦合潮流控制器的控制方法，包括三层控制策略，分别为暂态闭锁策略、远端潮流总控制策略和潮流自控策略。最高优先级控制策略“暂态闭锁策略”和最低级的控制策略“潮流自控策略”均由就地模块实现。第二优先级控制策略“远端潮流总控策略”由远端调度总控台实现。该方法对分布式潮流控制器的控制策略按照实际控制保护的控制或动作的优先级进行分级，但其并非分层，因此在控制策略较多时，造成级次很多，从而不利于理解和应用。
专利《一种分布式串联耦合潮流控制器的保护装置及方法》，提出了一种通过修改故障电流保护定值的方法来适应不同规划时期的电网线路故障保护需求，提出了保护装置的配置。该专利未提及控制保护系统的分层结构及配置。
专利《一种分布式潮流控制系统及方法》，提出了一种分布式潮流控制器的系统，包含分布式潮流控制器、主控器和能量管理模块。分布式潮流控制器主要采集线路的运行数据和自身的状态信息传送给主控器、并根据主控器发送的调节指令执行相应的工作模式。所述控制系统的三个部分紧密联系，分布式潮流控制器不能独立运行。
论文《基于集中控制的分布式潮流控制器策略研究》提出，分布式潮流控制器采用分布式安装、主从控制的方式实现，由子控制单元和主控制器组成。主控制器安装在变电站内，以集中控制方式对所有子单元进行统一控制。系统若干个子控制单元和一个主控制器之间构建无线通信网络来交换数据。论文提出DPFC的主控制器实现系统级控制策略，根据运行人员设定的系统潮流调节目标及补偿模式确定线路上DPFC子单元的运行状态和输出容量。该论文提出的控制保护系统中主控单元确定各子单元的运行状态和输出容量。由于线路状态一直在变化，因此该论文所述的控制保护系统需要进行反复迭代投入子模块单元，从而导致控制响应时间较慢。
发明内容
本申请的各示例性实施例提供一种分布式串联补偿器的控制保护系统，采用分级布置、分层控制的方式，结构清晰，可实现分布式模块的独立运行和集中协调控制保护，提高整体系统的运行性能和可靠性，适合于工程应用。
根据本申请一方面，提出一种分布式串联补偿器的控制保护系统。所述分布式串联补偿器由N个就地串联补偿模块分布串联在线路上，或者集中串联布置在变电站内，N为自然数，N大于1；所述控制保护系统包括：远端调度控制层，所述远端调度控制层采用分级布置、分层控制，所述远端调度控制层配置为根据交流电网的实时运行状态，得出所述分布式串联补偿器进行所述电网的潮流优化调节的最优线路功率指令或根据所述电网的实时运行状态和负荷预测结果得到功率控制指令曲线；站内集中控制保护层，所述站内集中控制保护层配置为接收第一功率指令或获取第二功率指令，并将所述第一功率指令或所述第二功率指令转化为各所述就地串联补偿模块的第一注入电压指令，并协调控制和集中保护各所述就地串联补偿模块，其中，所述第一功率指令是所述最优线路功率指令，且所述第二功率指令是根据所述电网的实时运行状态和负荷预测结果设定的或预先设定的所述功率控制指令曲线；和就地模块控制层，所述就地模块控制层包括：模块控制保护层，所述模块控制保护层包括控制保护单元，所述模块控制保护层配置为接收所述站内集中控制保护层发送的所述第一注入电压指令或者获取预先设定的第二注入电压指令，所述控制保护单元配置为合成所述第一注入电压指令或所述第二注入电压指令以产生用于所述就地串联补偿模块的输出电压指令；和模块阀基控制层，所述模块阀基控制层配置为将所述就地串联补偿模块的所述输出电压指令转化为用于所述就地串联补偿模块内的电力电子器件的开通或关断命令。
在一实施例中，所述站内集中控制保护层包括：各所述就地串联补偿模块的协调控制单元、三相电压不平衡控制单元和集中保护单元；其中，所述各就地串联补偿模块的协调控制单元配置为实现对各所述就地 串联补偿模块的投入和退出的时序控制以及所述第一注入电压指令的分配；所述三相电压不平衡控制单元配置为平衡线路的三相电压；以及所述各就地串联补偿模块的所述集中保护单元配置为在交流系统发生故障时保护所有所述就地串联补偿模块，以及与交流系统保护相配合。
在一实施例中，所述协调控制单元和所述集中保护单元集成于一台装置。
在一实施例中，所述协调控制单元、所述三相电压不平衡控制单元和所述集中保护单元集成于一台装置。
在一实施例中，所述站内集中控制保护层包含线路过载控制单元，所述线路过载控制单元配置为当所述分布式串联补偿器所接入的线路的或者相邻线路的线路电流超过预设值时，调节发送给各就地模块控制层的所述第一注入电压指令，以控制所述线路电流在设定值内。
在一实施例中，所述站内集中控制保护层配置有两套功能一样的集中控制保护设备，所述两套集中控制保护设备均包括用于实现所述两套设备的主系统和备系统的选择功能的协调控制单元，所述主系统配置为优先执行传输给所述模块控制保护层的指令。
在一实施例中，所述模块控制保护层的所述控制保护单元包括：直流电压控制单元、线路过载控制单元、电压指令限制单元和过电流保护单元；其中，所述直流电压控制单元配置为稳定所述就地串联补偿模块电容电压；所述线路过载控制单元配置为控制所述分布式串联补偿器所接入的线路的电流在设定值以内；以及所述过电流保护单元用于避免所述就地串联补偿模块承受过电流冲击，保护所述就地串联补偿模块安全。
在一实施例中，所述直流电压控制单元、所述线路过载控制单元和所述过电流保护子单元集成于一块控制板卡。
在一实施例中，所述控制保护系统应用于多回线路中。
在一实施例中，所述站内集中控制保护层还包含多回线路功率的协调控制单元，所述协调控制单元配置为分配多回线路功率指令。
在一实施例中，每回线路中的所有就地串联补偿模块配置有一套站内集中控制设备，所述一套站内集中控制设备包含协调控制单元和集中保护单元。
在一实施例中，所述远端调度控制层与所述站内集中控制保护层通过光纤或网线通讯；以及所述站内集中控制保护层和所述就地模块控制保护层通过无线或者光纤通讯。
采用上述方案后，本申请分布式串联补偿器的控制保护系统能够实现分布式模块的独立运行和集中协调控制保护，提高了整体系统的运行性能和可靠性，更好的发挥分布式串联补偿器优化系统潮流的优势。上述分布式串联补偿器的控制保护系统方案采用分层布置，系统结构清晰、简单，功能全面且相互配合，适合于工程应用。
应当理解的是，以上的一般描述的实施例和后文的细节描述的具体实施例仅是示例性的，本申请并不限制于此。
附图说明
图1示出根据本申请一实施例的分布式串联补偿器的控制保护系统结构图。
图2示出根据本申请另一实施例的分布式串联补偿器的控制保护系统结构图。
图3示出根据本申请一实施例的分布式串联补偿器系统的结构图。
图4示出根据本申请又一实施例的适用于双回线路应用的分布式串联补偿器的控制保护系统结构图。
具体实施方式
现在将参考附图更全面地描述示例实施例。通过参照附图详细描述其示例实施例，本申请的上述和其它目标、特征及优点将变得更加显而易见。然而，示例实施例能够以多种形式实施，且不应被理解为限于在此阐述的实施例。相反，提供这些实施例使得本申请将全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的实施例的充分理解。然而，本领域技术人员将意识到，可以实践本公开 的技术方案而没有这些特定细节中的一个或更多，或者可以采用其它的方式、组元、材料、装置或操作等。在这些情况下，将不详细示出或描述公知结构、方法、装置、实现、材料或者操作。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序，也不是用于进一步的限定。此外，术语“包括”和“具有”以及它们任何衍生词，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
为了充分发挥分布式串联补偿器潮流优化的特点，保护其设备及电力系统的安全，推动分布式潮流控制器应用的快速发展，发明人发现，需要一种性能更优、结构更清晰、功能更全面、更适合工程应用的分布式串联补偿器的控制保护系统。
下面结合附图对本申请的具体实施方式进行详细说明。
图1示出根据本申请一实施例的分布式串联补偿器的控制保护系统结构图。图2示出根据本申请另一实施例的分布式串联补偿器的控制保护系统结构图。图3示出根据本申请一实施例的分布式串联补偿器系统的结构图。
参见图1和图3，分别示出了根据本申请一实施例的分布式串联补偿器的基本结构及控制保护系统。分布式串联补偿器由N个就地串联补偿模块113(Local Series Compensation Module)分布串联在线路上或者集中串联布置在变电站内，N为自然数，N大于1。每个就地串联补偿模块113均包含电压源换流器301和旁路设备303。
根据本申请该实施例的分布式串联补偿器的控制保护系统采用三级布置、四层控制保护的结构。三级布置层包括远端调度控制层103、站内集中控制保护层105和就地模块控制层。四个控制保护层包括远端调度控制层103、站内集中控制保护层105、模块控制保护层109和模块阀基控制层111，其中，远端调度控制层103和站内集中控制保护层105通过光纤或网线彼此通讯，站内集中控制保护层105和模块控制保护层 109通过无线或者光纤彼此通讯。
可以理解为，三级布置层是指这三级放在不同的地方；四层控制是指控制系统分为了四个层次来实现。三级布置的是硬件，四层控制指软件，其中模块控制保护层109和模块阀基控制层111的软件均布置在就地单元模块中。远端调度控制层103布置在远方电力调度中心，站内集中控制保护层105布置在分布串串联补偿器的控制保护室。
根据一些实施例，远端调度控制层103根据交流电网101的实时运行状态，得出分布式串联补偿器进行电网101的潮流优化调节的最优线路功率指令或根据电网101的实时运行状态和负荷预测结果(Result of Load Forecasting)得到功率控制指令曲线。功率指令是指需要通过分布式潮流控制器将线路的有功功率调节到的目标值。功率控制指令曲线是指在不同时间段内，(根据电网101的实时运行状态和负荷预测结果得到的)不同的线路功率指令所形成的曲线。站内集中控制保护层105将功率指令转化为各就地串联补偿模块113的第一注入电压指令，并协调控制和集中保护各就地串联补偿模块113。主要通过以下方式实现协调控制和集中保护：各就地串联补偿模块的协调控制单元配置为实现对各就地串联补偿模块的投入和退出的时序控制以及第一注入电压指令的分配；三相电压不平衡控制单元配置为平衡线路的三相电压；各就地串联补偿模块的集中保护单元配置为在交流系统发生故障时保护所有就地串联补偿模块，以及与交流系统保护相配合。
线路功率指令可由远端调度控制层103发送、或者由站内运行人员根据电网101的实时运行状态和负荷预测结果设定或预先设定。模块控制保护层109接收站内集中控制保护层105发送的第一注入电压指令或者预先设定第二注入电压指令，第一注入电压指令和第二注入电压指令经模块控制保护层109的控制保护单元合成后产生就地模块输出电压指令。模块阀基控制层111将所述就地模块输出电压指令转化为就地串联补偿模块113内电力电子器件的开通或关断命令。
根据一些实施例，站内集中控制保护层105包括但不限于：各就地串联补偿模块113的协调控制单元、三相电压不平衡控制单元和集中保护单元。其中，各就地串联补偿模块113的协调控制单元实现对各就地 串联补偿模块113的投入和退出以及注入电压指令的分配。三相电压不平衡控制单元实现线路三相电压的平衡。各就地串联补偿模块113的集中保护单元实现在交流系统发生故障时对就地串联补偿模块的保护、以及与交流系统保护的配合功能。
根据一些实施例，前述协调控制单元、三相电压不平衡控制单元和集中保护单元集成在一台装置上。
根据另一些实施例，前述协调控制单元和集中保护单元集成在一台装置上。
根据一些实施例，站内集中控制保护层105包含线路过载控制单元，当分布式串联补偿器所接入的线路或者相邻线路电流超过设定值时，线路过载控制单元调节各就地串联补偿模块113的注入电压指令，控制线路电流在设定值内。
根据一些实施例，模块控制保护层109的控制保护单元包括但不限于：直流电压控制单元、线路过载控制单元、电压指令限制单元和过电流保护单元。其中，直流电压控制单元实现就地串联补偿模块电容电压的稳定，线路过载控制单元可控制分布式串联补偿器所接入的线路的电流在设定值以内，过电流保护单元避免就地串联补偿模块承受过电流冲击，保护就地串联补偿模块113安全。
根据一些实施例，前述直流电压控制子单元、线路过载控制单元、电压指令限制单元和过电流保护子单元可集成于一块控制板卡。
根据一些实施例，参见图2,站内集中控制保护层105、107配置有两套功能一样的集中控制保护系统，两套系统的功能分别集成于两台装置中，如图中的站内集中控制保护层105和站内集中控制保护层107。两套系统均包括用于实现两套系统的主系统和备系统选择功能的协调控制单元。主系统传输给模块控制保护层109的指令被优先执行。两台装置均与远端调度控制层103、以及模块控制保护层109通讯。
图4示出根据本申请又一实施例的适用于双回线路应用的分布式串联补偿器的控制保护系统结构图。
根据一些实施例，如图4所示，对于多回线路应用的场景，每回线路各就地串联补偿模块113配置一套站内集中控制装置，包含协调控制 单元和集中保护单元。此外，站内集中控制保护层105还包含多回线路功率的协调控制单元，实现对多回线路功率指令的分配。
本领域普通技术人员可以理解实现上述实施例中的全部或部分模块或层，是可以通过计算机程序来指令相关的硬件来完成，所述的计算机程序可存储于一非易失性计算机可读取存储介质中，该计算机程序在由计算机的处理器执行时，可实现上述相关模块或层的功能。其中，本申请所提供的各实施例中所使用的对存储器、存储、数据库或其它介质的任何引用，均可包括非易失性和/或易失性存储器。非易失性存储器可包括只读存储器(ROM)、可编程ROM(PROM)、电可编程ROM(EPROM)、电可擦除可编程ROM(EEPROM)或闪存。易失性存储器可包括随机存取存储器(RAM)或者外部高速缓冲存储器。作为说明而非局限，RAM以多种形式可得，诸如静态RAM(SRAM)、动态RAM(DRAM)、同步DRAM(SDRAM)、双数据率SDRAM(DDRSDRAM)、增强型SDRAM(ESDRAM)、同步链路(Synchlink)、DRAM(SLDRAM)、存储器总线(Rambus)直接RAM(RDRAM)、直接存储器总线动态RAM(DRDRAM)、以及存储器总线动态RAM(RDRAM)等。
以上对本申请实施例进行了详细描述和解释。应清楚地理解，本申请描述了如何形成和使用特定示例，但本申请不限于这些示例的任何细节。相反，基于本申请公开的内容的教导，这些原理能够应用于许多其它实施例。
通过对示例实施例的描述，本领域技术人员易于理解，根据本申请实施例的技术方案至少具有以下优点中的一个或多个。
采用上述方案后，本申请分布式串联补偿器的控制保护系统能够实现分布式模块的独立运行和集中协调控制保护，提高整体系统的运行性能和可靠性，更好的发挥分布式串联补偿器优化系统潮流的优势。上述分布式串联补偿器的控制保护系统方案采用分层布置，系统结构清晰、简单，功能全面且相互配合，适合于工程应用。
以上具体地示出和描述了本申请的示例性实施例。应可理解的是，本申请不限于这里描述的详细结构、设置方式或实现方法。相反，本申请意图涵盖包含在所附权利要求的精神和范围内的各种修改和等效设置。

Claims (12)

  1. 一种分布式串联补偿器的控制保护系统，其中：
    所述分布式串联补偿器由N个就地串联补偿模块分布串联在线路上，或者集中串联布置在变电站内，N为自然数，N大于1；
    所述控制保护系统包括：
    远端调度控制层，所述远端调度控制层采用分级布置、分层控制，所述远端调度控制层配置为根据交流电网的实时运行状态，得出所述分布式串联补偿器进行所述电网的潮流优化调节的最优线路功率指令或根据所述电网的实时运行状态和负荷预测结果得到功率控制指令曲线；
    站内集中控制保护层，所述站内集中控制保护层配置为接收第一功率指令或获取第二功率指令，并将所述第一功率指令或所述第二功率指令转化为各所述就地串联补偿模块的第一注入电压指令，并协调控制和集中保护各所述就地串联补偿模块，其中，所述第一功率指令是所述最优线路功率指令，且所述第二功率指令是根据所述电网的实时运行状态和负荷预测结果设定的或预先设定的所述功率控制指令曲线；和
    就地模块控制层，所述就地模块控制层包括：
    模块控制保护层，所述模块控制保护层包括控制保护单元，所述模块控制保护层配置为接收所述站内集中控制保护层发送的所述第一注入电压指令或者获取预先设定的第二注入电压指令，所述控制保护单元配置为合成所述第一注入电压指令或所述第二注入电压指令以产生用于所述就地串联补偿模块的输出电压指令；和
    模块阀基控制层，所述模块阀基控制层配置为将所述就地串联补偿模块的所述输出电压指令转化为用于所述就地串联补偿模块内的电力电子器件的开通或关断命令。
  2. 如权利要求1所述的控制保护系统，其中，
    所述站内集中控制保护层包括：各所述就地串联补偿模块的协调控 制单元、三相电压不平衡控制单元和集中保护单元；
    其中，所述各就地串联补偿模块的协调控制单元配置为实现对各所述就地串联补偿模块的投入和退出的时序控制以及所述第一注入电压指令的分配；
    所述三相电压不平衡控制单元配置为平衡线路的三相电压；以及
    所述各就地串联补偿模块的所述集中保护单元配置为在交流系统发生故障时保护所有所述就地串联补偿模块，以及与交流系统保护相配合。
  3. 如权利要求2所述的控制保护系统，其中，
    所述协调控制单元和所述集中保护单元集成于一台装置。
  4. 如权利要求2所述的控制保护系统，其中，
    所述协调控制单元、所述三相电压不平衡控制单元和所述集中保护单元集成于一台装置。
  5. 如权利要求1所述的控制保护系统，其中，
    所述站内集中控制保护层包含线路过载控制单元，所述线路过载控制单元配置为当所述分布式串联补偿器所接入的线路的或者相邻线路的线路电流超过预设值时，调节发送给各就地模块控制层的所述第一注入电压指令，以控制所述线路电流在设定值内。
  6. 如权利要求1所述的控制保护系统，其中，
    所述站内集中控制保护层配置有两套功能一样的集中控制保护设备，所述两套集中控制保护设备均包括用于实现所述两套设备的主系统和备系统的选择功能的协调控制单元，所述主系统配置为优先执行传输给所述模块控制保护层的指令。
  7. 如权利要求1所述的控制保护系统，其中，
    所述模块控制保护层的所述控制保护单元包括：直流电压控制单元、线路过载控制单元、电压指令限制单元和过电流保护单元；
    其中，所述直流电压控制单元配置为稳定所述就地串联补偿模块电容电压；
    所述线路过载控制单元配置为控制所述分布式串联补偿器所接入的线路的电流在设定值以内；以及
    所述过电流保护单元用于避免所述就地串联补偿模块承受过电流冲 击，保护所述就地串联补偿模块安全。
  8. 如权利要求7所述的控制保护系统，其中，
    所述直流电压控制单元、所述线路过载控制单元和所述过电流保护子单元集成于一块控制板卡。
  9. 如权利要求1所述的控制保护系统，其中，
    所述控制保护系统应用于多回线路中。
  10. 如权利要求9所述的控制保护系统，其中，
    所述站内集中控制保护层还包含多回线路功率的协调控制单元，所述协调控制单元配置为分配多回线路功率指令。
  11. 如权利要求9所述的控制保护系统，其中，
    每回线路中的所有就地串联补偿模块配置有一套站内集中控制设备，所述一套站内集中控制设备包含协调控制单元和集中保护单元。
  12. 根据权利要求1所述的控制保护系统，其中，
    所述远端调度控制层与所述站内集中控制保护层通过光纤或网线通讯；以及
    所述站内集中控制保护层和所述就地模块控制保护层通过无线或者光纤通讯。
PCT/CN2021/110604 2020-08-06 2021-08-04 分布式串联补偿器的控制保护系统 Ceased WO2022028487A1 (zh)

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