WO2017088510A1 - Determination method for series compensation device having adjustable rated parameter - Google Patents

Determination method for series compensation device having adjustable rated parameter Download PDF

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WO2017088510A1
WO2017088510A1 PCT/CN2016/092280 CN2016092280W WO2017088510A1 WO 2017088510 A1 WO2017088510 A1 WO 2017088510A1 CN 2016092280 W CN2016092280 W CN 2016092280W WO 2017088510 A1 WO2017088510 A1 WO 2017088510A1
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rated
series
compensation device
series compensation
development
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PCT/CN2016/092280
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French (fr)
Chinese (zh)
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韩彬
班连庚
项祖涛
杜宁
宋瑞华
王晓彤
郑彬
张媛媛
韩亚楠
周佩朋
杨大业
马其燕
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中国电力科学研究院
国家电网公司
国网湖北省电力公司
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Publication of WO2017088510A1 publication Critical patent/WO2017088510A1/en

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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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • 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
    • Y02E40/30—Reactive power compensation

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  • the invention relates to the technical field of long-distance transmission, and particularly relates to a method for determining a series compensation device with adjustable rated parameters.
  • the series compensation technology can improve the transmission capacity of the long-distance transmission system and improve the stability of the system.
  • the series compensation device has broad application prospects in the power system.
  • the capacitor is used to compensate the line impedance, thereby improving the stability of the system.
  • the short circuit current will cause a high voltage across the capacitor bank.
  • Capacitors are limited in their ability to withstand voltage and must be limited to a specified level. Therefore, it is necessary to install a certain overvoltage protection device.
  • the "metal oxide voltage limiter (MOV)-parallel gap combination” is a widely used and mature overvoltage protection technology.
  • Figure 1 shows the wiring diagram of the series compensation device using the "MOV-parallel gap combination" overvoltage protection.
  • MOV is the main protection to limit the capacitor voltage
  • the gap is the backup protection of MOV and capacitor
  • the bypass breaker is the necessary device for system maintenance and scheduling, and also provides the necessary conditions for the spark gap to be free
  • the damping circuit is used to limit The capacitor discharges current to prevent damage to capacitors, gaps, and bypass breakers during discharge.
  • the rated parameters of the series compensation device mainly include the series compensation capacitor rated current and the series compensation capacitor capacitance, and the overvoltage protection device parameters of the series compensation device are also determined.
  • the current general design method is to determine the rated parameters of the series compensation device and the parameters of the overvoltage protection device by considering the near-term and long-term system conditions.
  • the program has the following drawbacks:
  • the long-term system conditions such as the power grid structure and the transmission power flow
  • the common method is to select the rated current according to the long-term planning and considering the larger margin.
  • Sexually built if within a certain period of time or even the entire equipment cycle system
  • the actual trend level is significantly lower than the design level, which is a huge waste for engineering, and may also adversely affect reliability due to the large number of components.
  • an embodiment of the present invention provides a method for determining a series compensation device with adjustable rated parameters.
  • Embodiments of the present invention provide a method for determining a series compensation device with adjustable nominal parameters, including:
  • the determining the rated current and the rated capacitive reactance of the series compensation device includes:
  • the current value of the rated current is greater than the current value corresponding to the output power Q nmax , and meets the requirement of the output power Q f .
  • 1 is a schematic structural view of a series compensation device and an overvoltage protection device thereof;
  • FIG. 3 is a schematic diagram of a damping circuit of an overvoltage protection device of a series compensation device according to an embodiment of the present invention.
  • determining a development stage of a power system in which the series compensation device is located determining a rated current and a rated capacitive reactance when the power system requires a series compensation device for compensation at different development stages; The rated current and rated capacitive reactance when the series compensation device is compensated, optimize the rated parameters of the series compensation device of the power system at different development stages; determine the series compensation device capacitor of the power system at different development stages according to the optimized series compensation device rated parameters The expansion mode; calculating the overvoltage of the series compensation device under different working conditions according to the optimized series compensation device rated parameter and the electromagnetic transient simulation model of the power system at different development stages, and determining the series compensation device according to the overvoltage The parameters and expansion methods of the overvoltage protection device.
  • Step 1 According to the power grid structure, transmission flow, operation mode, etc. of different development stages of the power system, an electromechanical transient simulation model including a series compensation device is constructed.
  • the requirement that the output power Q f is satisfied means that the series compensation device at the rated current can withstand the short-time output power Q f under a fault condition.
  • Step 205 Calculate the overvoltage of the series compensation device under different working conditions according to the optimized rated resistance of the series compensation device and the electromagnetic transient simulation model of the power system at different development stages, and determine the overvoltage protection of the series compensation device according to the overvoltage. Device parameters and extensions.
  • the different working conditions mainly consider single-phase and multi-phase ground faults in the power system. Waiting for the situation.
  • the parameters of the overvoltage protection device in this embodiment include: MOV rated voltage, MOV rated capacity, gap operating voltage, resistance value of the damping circuit, and inductance value.
  • the extension manner of the overvoltage protection device for determining the series compensation device according to the overvoltage in different development stages of the power system includes:
  • valve series connection number S1 and the valve piece parallel number P1 of the MOV in the first development stage are determined according to the MOV rated voltage and the MOV rated capacity, and the valve series connection number S2 and the valve plate parallel number of the MOV in the second development stage are determined.
  • the damping loop consists of a resistor and an inductor.
  • the inductance value is related to the rated parameter of the MOV capacitor, and the resistance value is related to the inductance value.
  • the discharge resonance frequency f1 of the first development stage damping circuit and the discharge resonance frequency f2 of the second development stage damping circuit are determined according to the resistance value and the inductance value, according to the difference between the discharge resonance frequency f1 and the discharge resonance frequency f2.
  • the value determines an inductance value required to expand the damping circuit in the second development stage, and obtains a resistance value required to expand the damping circuit according to the inductance value;
  • the discharge gap of the overvoltage protection device of the series compensation device in this embodiment is an adjustable parallel gap, which satisfies the requirements of the discharge voltage in different development stages.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

A determination method for a series compensation device having an adjustable rated parameter comprises: determining a development stage of a power system in which a series compensation device is located (201); determining a rated current and a rated capacitive reactance of the power system for different development stages in which the power system requires the series compensation device to perform compensation (202); optimizing the rated parameters of the series compensation device for the different development stages (203); determining a means of expanding a capacitor of the series compensation device of the power system for the different development stages (204); and determining a parameter and expansion means of an overvoltage protection device of the series compensation device (205).

Description

一种额定参数可调整的串联补偿装置确定方法Method for determining series compensation device with adjustable rated parameters 技术领域Technical field
本发明涉及远距离输电技术领域，具体涉及一种额定参数可调整的串联补偿装置确定方法。The invention relates to the technical field of long-distance transmission, and particularly relates to a method for determining a series compensation device with adjustable rated parameters.
背景技术Background technique
串联补偿技术可以提高远距离输电系统传输容量、改善系统稳定性，串联补偿装置在电力系统中有广阔的应用前景。在串联补偿装置中，电容器是用来补偿线路阻抗的，从而提高了系统的稳定性。但是在暂态过程中，短路电流将造成电容器组两端的高电压。电容器承受过电压能力有限，必须将其限制到规定的一定水平以内。因此还需要装设一定的过电压保护装置，“金属氧化物限压器(MOV)-并联间隙组合”是目前应用较广泛，较成熟的过电压保护技术。图1给出了采用“MOV-并联间隙组合”过电压保护的串联补偿装置接线示意图。其中，MOV是限制电容器电压的主保护；间隙是MOV和电容器的后备保护；旁路断路器是系统检修、调度的必要装置，同时也为火花间隙去游离提供必要条件；阻尼回路则用于限制电容器放电电流，防止电容器、间隙、旁路断路器在放电过程中损坏。The series compensation technology can improve the transmission capacity of the long-distance transmission system and improve the stability of the system. The series compensation device has broad application prospects in the power system. In the series compensation device, the capacitor is used to compensate the line impedance, thereby improving the stability of the system. However, during the transient process, the short circuit current will cause a high voltage across the capacitor bank. Capacitors are limited in their ability to withstand voltage and must be limited to a specified level. Therefore, it is necessary to install a certain overvoltage protection device. The "metal oxide voltage limiter (MOV)-parallel gap combination" is a widely used and mature overvoltage protection technology. Figure 1 shows the wiring diagram of the series compensation device using the "MOV-parallel gap combination" overvoltage protection. Among them, MOV is the main protection to limit the capacitor voltage; the gap is the backup protection of MOV and capacitor; the bypass breaker is the necessary device for system maintenance and scheduling, and also provides the necessary conditions for the spark gap to be free; the damping circuit is used to limit The capacitor discharges current to prevent damage to capacitors, gaps, and bypass breakers during discharge.
因此，串联补偿装置额定参数主要包括串联补偿电容器额定电流及串联补偿电容器容抗，另外还需要确定串联补偿装置的过电压保护装置参数。Therefore, the rated parameters of the series compensation device mainly include the series compensation capacitor rated current and the series compensation capacitor capacitance, and the overvoltage protection device parameters of the series compensation device are also determined.
目前通用的设计方法是通过考虑近期和远期系统条件，来确定串联补偿装置额定参数及过电压保护装置的参数。但该方案存在以下缺陷：The current general design method is to determine the rated parameters of the series compensation device and the parameters of the overvoltage protection device by considering the near-term and long-term system conditions. However, the program has the following drawbacks:
第一，串联补偿装置设计过程中，远期的系统条件，如电网结构、输送潮流等难以准确估计，而通用的作法是按照远期规划并考虑较大的裕度选择额定电流，在初期一次性建成，若一定时期内甚至整个设备周期系统 实际潮流水平显著低于设计水平，则对工程来说是一种巨大的浪费，同时还可能由于元件数量巨大给可靠性带来不利影响。First, in the design process of the series compensation device, the long-term system conditions, such as the power grid structure and the transmission power flow, are difficult to accurately estimate. The common method is to select the rated current according to the long-term planning and considering the larger margin. Sexually built, if within a certain period of time or even the entire equipment cycle system The actual trend level is significantly lower than the design level, which is a huge waste for engineering, and may also adversely affect reliability due to the large number of components.
第二，虽然在设计时考虑了较大裕度，但系统条件可能出现预期外的变化，这时串联补偿装置及其过电压保护装置往往不能适应，仍然需要进行改造。Second, although a large margin is considered in the design, the system conditions may be unexpectedly changed. At this time, the series compensation device and its overvoltage protection device are often unable to adapt and still need to be modified.
因此，如何提供一种经济性、可靠性高的串联补偿装置设计方案是目前亟待解决的问题。Therefore, how to provide an economical and highly reliable series compensation device design is an urgent problem to be solved.
发明内容Summary of the invention
为解决现有存在的技术问题，本发明实施例提供一种额定参数可调整的串联补偿装置确定方法。In order to solve the existing technical problems, an embodiment of the present invention provides a method for determining a series compensation device with adjustable rated parameters.
本发明实施例的技术方案是这样实现的：The technical solution of the embodiment of the present invention is implemented as follows:
本发明实施例提供了一种额定参数可调整的串联补偿装置确定方法，包括：Embodiments of the present invention provide a method for determining a series compensation device with adjustable nominal parameters, including:
确定串联补偿装置所在电力系统的发展阶段；Determining the development stage of the power system in which the series compensation device is located;
确定所述电力系统在不同发展阶段需要串联补偿装置进行补偿时的额定电流和额定容抗；Determining a rated current and a rated capacitive reactance when the power system requires a series compensation device for compensation at different stages of development;
依据需要串联补偿装置进行补偿时的额定电流和额定容抗，优化电力系统在不同发展阶段的串联补偿装置额定参数；According to the rated current and rated capacitive reactance when the series compensation device is required for compensation, the rated parameters of the series compensation device of the power system at different development stages are optimized;
依据优化后的串联补偿装置额定参数，确定电力系统在不同发展阶段的串联补偿装置电容器扩展方式；Determining the capacitor expansion mode of the series compensation device of the power system at different development stages according to the optimized series compensation device rated parameter;
依据所述优化后的串联补偿装置额定参数和电力系统在不同发展阶段的电磁暂态仿真模型，计算不同工况条件下串联补偿装置的过电压，依据所述过电压确定串联补偿装置的过电压保护装置的参数和扩展方式。According to the optimized series compensation device rated parameter and the electromagnetic transient simulation model of the power system at different development stages, the overvoltage of the series compensation device under different working conditions is calculated, and the overvoltage of the series compensation device is determined according to the overvoltage The parameters and expansion methods of the protection device.
上述方案中，所述确定串联补偿装置的额定电流和额定容抗，包括：In the above solution, the determining the rated current and the rated capacitive reactance of the series compensation device includes:
构建电力系统的机电暂态仿真模型； Constructing an electromechanical transient simulation model of the power system;
依据所述机电暂态仿真模型计算电力系统正常运行时串联补偿装置的输出功率Qn，获取电力系统在所有发展阶段中该输出功率Qn的最大值Qnmax；并计算电力系统故障时串联补偿装置的输出功率Qf；Calculating the output power Q n of the series compensation device during normal operation of the power system according to the electromechanical transient simulation model, obtaining the maximum value Q nmax of the output power Q n of the power system in all development stages; and calculating the series compensation when the power system is faulty The output power of the device Q f ;
依据所述输出功率Qnmax和输出功率Qf确定所述串联补偿装置的额定电流；Determining a rated current of the series compensation device according to the output power Q nmax and the output power Q f ;
依据所述电力系统在不同发展阶段系统的输送能力确定所述串联补偿装置的额定容抗；其中，Determining a rated capacitive reactance of the series compensation device according to a transmission capability of the power system in different development stages; wherein
依据所述输出功率Qnmax和输出功率Qf确定所述串联补偿装置的额定电流时，所述额定电流的电流值大于所述输出功率Qnmax对应的电流值，并满足输出功率Qf的要求。Determining the rated current of the series compensation device according to the output power Q nmax and the output power Q f , the current value of the rated current is greater than the current value corresponding to the output power Q nmax , and meets the requirement of the output power Q f .
上述方案中，所述电力系统的发展阶段包括第一发展阶段和第二发展阶段，所述依据需要串联补偿装置进行补偿时的额定电流和额定容抗，优化电力系统在不同发展阶段的串联补偿装置额定参数，包括：In the above solution, the development phase of the power system includes a first development phase and a second development phase, where the rated current and the rated capacitive reactance when the series compensation device is required for compensation are used, and the series compensation of the power system at different development stages is optimized. Device rating parameters, including:
依据所述第一发展阶段的串联补偿装置的额定电流IA和第二发展阶段的串联补偿装置的额定电流IB，得到优化后的第一发展阶段的串联补偿装置的额定电流I'A和第二发展阶段的串联补偿装置的额定电流I'B：According to the rated current I A of the series compensating device in the first development stage and the rated current I B of the series compensating device in the second development stage, the rated current I′ A of the series compensating device in the optimized first development stage is obtained. The rated current I' B of the series compensation device of the second development stage:
(1)若
Figure PCTCN2016092280-appb-000001
则I'A＝I'b＝max(IA,Ib)；(1) If
Figure PCTCN2016092280-appb-000001
Then I' A = I' b = max(I A , I b );
(2)若
Figure PCTCN2016092280-appb-000002
则I'A＝IA，I'B＝IB；(2) If
Figure PCTCN2016092280-appb-000002
Then I' A = I A , I' B = I B ;
依据所述第一发展阶段的串联补偿装置的额定容抗XCA和第二发展阶段的串联补偿装置的额定容抗XCB，得到优化后的第一发展阶段的串联补偿装置的额定容抗X'CA和第二发展阶段的串联补偿装置的额定容抗X'CB：According to the rated capacitive reactance X CA of the series compensating device in the first development stage and the rated capacitive reactance X CB of the series compensating device in the second development stage, the rated capacitive reactance X of the series compensating device in the optimized first development stage is obtained. The rated capacitive reactance X' CB of the series compensation device of CA and the second development stage:
(1)若
Figure PCTCN2016092280-appb-000003
则X'CA＝X'CB＝max(XCA,XCB)； (1) If
Figure PCTCN2016092280-appb-000003
Then X' CA = X' CB = max(X CA , X CB );
(2)若
Figure PCTCN2016092280-appb-000004
则X'CA＝XCA，X'CB＝XCB；(2) If
Figure PCTCN2016092280-appb-000004
Then X' CA = X CA , X' CB = X CB ;
上述方案中，所述电力系统的发展阶段包括第一发展阶段和第二发展阶段，优化后的串联补偿装置额定参数包括第一发展阶段的串联补偿装置的额定电流I'A和第二发展阶段的串联补偿装置的额定电流I'B，以及第一发展阶段的串联补偿装置的额定容抗X'CA和第二发展阶段的串联补偿装置的额定容抗X'CB，所述依据优化后的串联补偿装置额定参数，确定电力系统在不同发展阶段的串联补偿装置电容器扩展方式包括：In the above solution, the development phase of the power system includes a first development phase and a second development phase, and the optimized series compensation device rated parameters include a rated current I′ A and a second development phase of the series compensation device in the first development stage. The rated current I' B of the series compensating device, and the rated capacitive reactance X' CA of the series compensating device of the first development stage and the rated capacitive reactance X' CB of the series compensating device of the second development stage, the optimized The series compensation device rated parameters determine the capacitor expansion mode of the series compensation device of the power system at different stages of development, including:
(1)若I'B＝I'A且X'CB＝X'CA，则确定不需要扩展串联补偿装置的电容器；(1) If I' B = I' A and X' CB = X' CA , it is determined that it is not necessary to expand the capacitor of the series compensation device;
(2)若X'CB＝X'CA且I'B>I'A，则确定串联补偿装置中电容器增加的串联数和并联数；(2) If X' CB = X' CA and I' B >I' A , determining the number of series and parallel connections of the capacitor in the series compensation device;
(3)若I'B＝I'A且X'CB>X'CA，则确定串联补偿装置中电容器增加的串联数；(3) if I' B = I' A and X' CB >X' CA , determining the number of series connections of the capacitors in the series compensation device;
(4)若I'B>I'A且X'CB>X'CA，则确定串联补偿装置中电容器增加的串联数和并联数；(4) If I' B >I' A and X' CB >X' CA , determine the number of series and parallel connections of the capacitor in the series compensation device;
上述方案中，所述过电压保护装置的参数包括：MOV额定电压、MOV额定容量、间隙动作电压、阻尼回路的电阻值和电感值；In the above solution, the parameters of the overvoltage protection device include: MOV rated voltage, MOV rated capacity, gap operating voltage, resistance value of the damping circuit, and inductance value;
所述电力系统的发展阶段包括第一发展阶段和第二发展阶段，依据所述过电压确定串联补偿装置的过电压保护装置的扩展方式包括：The development phase of the power system includes a first development phase and a second development phase, and an extension manner of determining an overvoltage protection device of the series compensation device according to the overvoltage includes:
依据所述MOV额定电压和MOV额定容量确定第一发展阶段中MOV的阀片串联数S1和阀片并联数P1，以及第二发展阶段中MOV的阀片串联数S2和阀片并联数P2，则第二发展阶段中对MOV进行扩展的阀片串联数S1'＝S2-S1，阀片并联数P2'＝P2；Determining the valve series number S1 and the valve piece parallel number P1 of the MOV in the first development stage according to the MOV rated voltage and the MOV rated capacity, and the valve serial number S2 and the valve piece parallel number P2 of the MOV in the second development stage, Then in the second development stage, the number of valve series connected to the MOV is expanded S1'=S2-S1, and the number of valve plates connected in parallel is P2'=P2;
依据所述电阻值和电感值确定第一发展阶段阻尼回路的放电谐振频率f1和第二发展阶段阻尼回路的放电谐振频率f2，则依据所述放电谐振频率f1和放电谐振频率f2的差值确定第二发展阶段中对阻尼回路进行扩展需 要的电感值，并依据确定电感值得到对阻尼回路进行扩展需要的电阻值；Determining, according to the resistance value and the inductance value, the discharge resonance frequency f1 of the first development stage damping circuit and the discharge resonance frequency f2 of the second development stage damping circuit, according to the difference between the discharge resonance frequency f1 and the discharge resonance frequency f2 Expansion of the damping circuit in the second stage of development The required inductance value, and the resistance value required to expand the damping circuit is obtained according to the determined inductance value;
所述过电压保护装置的放电间隙为可调节式并联间隙。The discharge gap of the overvoltage protection device is an adjustable parallel gap.
本发明实施例提供的额定参数可调整的串联补偿装置确定方法，考虑了电力系统不同发展阶段对串联补偿装置的额定参数需求不同，分阶段确定该参数；分阶段扩展串联补偿装置的额定参数；分阶段扩展串联补偿过电压保护装置的参数；也就是说，本发明实施例的方案中，依据电力系统的发展阶段分阶段扩展串联补偿装置及其过电压保护装置的参数，提高了串联补偿装置的经济性和可靠性。The method for determining the series compensation device with adjustable rated parameters according to the embodiment of the present invention considers different requirements of the rated parameters of the series compensation device in different development stages of the power system, determines the parameter in stages, and expands the rated parameters of the series compensation device in stages; The parameters of the series compensation overvoltage protection device are expanded in stages; that is, in the solution of the embodiment of the invention, the parameters of the series compensation device and the overvoltage protection device are expanded in stages according to the development stage of the power system, and the series compensation device is improved. Economic and reliability.
附图说明DRAWINGS
图1为串联补偿装置及其过电压保护装置的结构示意图；1 is a schematic structural view of a series compensation device and an overvoltage protection device thereof;
图2为本发明实施例中一种额定参数可调整的串联补偿装置确定方法流程图；2 is a flow chart of a method for determining a series compensation device with adjustable nominal parameters according to an embodiment of the present invention;
图3为本发明实施例中串联补偿装置的过电压保护装置的阻尼回路示意图。3 is a schematic diagram of a damping circuit of an overvoltage protection device of a series compensation device according to an embodiment of the present invention.
具体实施方式detailed description
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.
串联补偿装置额定参数主要包括串联补偿电容器额定电流及串联补偿电容器容抗，另外还需要确定串联补偿装置的过电压保护装置参数。其中，串联补偿装置额定参数的选择和电力系统条件有关。而串联补偿装置的过电压保护装置参数又和电力系统条件，及所确定的串联补偿装置额定参数有关，其包括MOV额定电压、MOV容量、间隙的动作电压、动作定值、 阻尼回路参数等。The rated parameters of the series compensation device mainly include the rated current of the series compensation capacitor and the capacitive reactance of the series compensation capacitor. In addition, the parameters of the overvoltage protection device of the series compensation device need to be determined. Among them, the selection of the rated parameters of the series compensation device is related to the power system conditions. The overvoltage protection device parameter of the series compensation device is related to the power system condition and the determined series compensation device rated parameter, and includes the MOV rated voltage, the MOV capacity, the operating voltage of the gap, the action setting value, Damping loop parameters, etc.
目前，确定串联补偿装置额定参数的通用方法包括：Currently, common methods for determining the rated parameters of a series compensation device include:
(1)根据电网近期和远期规划，进行系统潮流和稳定计算，综合考虑近期和远期的最大正常功率输送所需的电流值，在此基础上，考虑一定裕度后，确定串联补偿装置额定电流；(1) According to the recent and long-term planning of the power grid, the system current flow and stability calculation are carried out, and the current values required for the maximum normal power transmission in the near and long term are comprehensively considered. On this basis, after considering a certain margin, the series compensation device is determined. Rated current
(2)根据电网近期和远期系统输送能力的需求，分别确定近期和远期所需的串联补偿装置容抗，取最大值作为额定容抗；(2) According to the demand of the transmission capacity of the short-term and long-term systems of the power grid, determine the capacitive reactance of the series compensation device required in the short-term and long-term, respectively, and take the maximum value as the rated capacitive reactance;
(3)根据所确定的串联补偿装置额定参数，进行电磁暂态计算，分别计算不同故障情况下，近期和远期系统条件下所需的MOV容量、MOV额定电压。一般MOV额定电压取近期和远期所需的最小值，额定容量取近期和远期所需的最大值；(3) According to the determined rated parameters of the series compensation device, the electromagnetic transient calculation is carried out to calculate the required MOV capacity and MOV rated voltage under the recent and long-term system conditions under different fault conditions. Generally, the rated voltage of MOV takes the minimum value required for the short-term and long-term, and the rated capacity takes the maximum value required for the short-term and long-term;
(4)根据所确定的MOV参数，确定间隙动作电压值，并确定阻尼回路相关参数。(4) According to the determined MOV parameters, determine the gap action voltage value and determine the relevant parameters of the damping loop.
从上面的描述中可以看出，目前所设计的串联补偿及相关装置参数满足近期和远期系统需求，虽然避免了串联补偿装置的改造升级，但仍然存在以下缺陷：As can be seen from the above description, the series compensation and related device parameters currently designed meet the requirements of near-term and long-term systems. Although the modification and upgrade of the series compensation device are avoided, the following defects still exist:
第一，串联补偿装置设计过程中，远期的系统条件，如电网结构、输送潮流等难以准确估计，而通用的作法是按照远期规划并考虑较大的裕度选择额定电流，在初期一次性建成，若一定时期内甚至整个设备周期系统实际潮流水平显著低于设计水平，则对工程来说是一种巨大的浪费，同时还可能由于元件数量巨大给可靠性带来不利影响。First, in the design process of the series compensation device, the long-term system conditions, such as the power grid structure and the transmission power flow, are difficult to accurately estimate. The common method is to select the rated current according to the long-term planning and considering the larger margin. If the actual trend level of the entire equipment cycle system is significantly lower than the design level in a certain period of time, it is a huge waste for the project, and it may also adversely affect the reliability due to the huge number of components.
第二，虽然在设计时考虑了较大裕度，但系统条件可能出现预期外的变化，这时串联补偿装置及其过电压保护装置往往不能适应，仍然需要进行改造。Second, although a large margin is considered in the design, the system conditions may be unexpectedly changed. At this time, the series compensation device and its overvoltage protection device are often unable to adapt and still need to be modified.
因此，需要提供一种能够根据系统发展分阶段扩展串联补偿装置额定 参数，提高串联补偿应用的经济性、可靠性的串联补偿设计方法。Therefore, it is necessary to provide a staged expansion of the series compensation device according to the development of the system. Parameters, a series compensation design method that improves the economics and reliability of series compensation applications.
基于此，在本发明的各种实施例中：确定串联补偿装置所在电力系统的发展阶段；确定所述电力系统在不同发展阶段需要串联补偿装置进行补偿时的额定电流和额定容抗；依据需要串联补偿装置进行补偿时的额定电流和额定容抗，优化电力系统在不同发展阶段的串联补偿装置额定参数；依据优化后的串联补偿装置额定参数，确定电力系统在不同发展阶段的串联补偿装置电容器扩展方式；依据所述优化后的串联补偿装置额定参数和电力系统在不同发展阶段的电磁暂态仿真模型，计算不同工况条件下串联补偿装置的过电压，依据所述过电压确定串联补偿装置的过电压保护装置的参数和扩展方式。Based on this, in various embodiments of the present invention, determining a development stage of a power system in which the series compensation device is located; determining a rated current and a rated capacitive reactance when the power system requires a series compensation device for compensation at different development stages; The rated current and rated capacitive reactance when the series compensation device is compensated, optimize the rated parameters of the series compensation device of the power system at different development stages; determine the series compensation device capacitor of the power system at different development stages according to the optimized series compensation device rated parameters The expansion mode; calculating the overvoltage of the series compensation device under different working conditions according to the optimized series compensation device rated parameter and the electromagnetic transient simulation model of the power system at different development stages, and determining the series compensation device according to the overvoltage The parameters and expansion methods of the overvoltage protection device.
本发明实施例提供的一种额定参数可调整的串联补偿装置确定方法，如图2所示，主要包括以下步骤：A method for determining a series compensation device with adjustable rated parameters according to an embodiment of the present invention, as shown in FIG. 2, mainly includes the following steps:
步骤201：确定串联补偿装置所在电力系统的发展阶段。Step 201: Determine a development stage of the power system in which the series compensation device is located.
本实施例中按照电力系统投入后运行时间的先后顺序将电力系统的发展阶段划分为第一发展阶段和第二发展阶段，即近期和远期两个阶段。In this embodiment, the development phase of the power system is divided into a first development phase and a second development phase, that is, two phases, a short-term and a long-term, in accordance with the sequence of operation time after the power system is put into operation.
其中，实际应用时，可以依据串联补偿装置所在系统的网架结构变化情况确定。具体来说，第一阶段为串联补偿装置投入运行时的系统结构所对应的阶段。第二阶段为串联补偿装置投入运行之后，系统结构又发生明显变化后所对应的阶段，如新的线路或设备增加后的系统结构等。Among them, in actual application, it can be determined according to the change of the grid structure of the system in which the series compensation device is located. Specifically, the first stage is a stage corresponding to the system structure when the series compensation device is put into operation. The second stage is the stage after the series compensation device is put into operation, and the system structure changes obviously, such as the new line or the system structure after the equipment is added.
步骤202：确定电力系统在不同发展阶段需要串联补偿装置进行补偿时的额定电流和额定容抗。Step 202: Determine a rated current and a rated capacitive reactance when the power system needs to be compensated by the series compensation device at different development stages.
这里，本步骤的具体实现可以包括：Here, the specific implementation of this step may include:
步骤1、根据电力系统不同发展阶段的电网结构、输送潮流、运行方式等，构建包括串联补偿装置在内的机电暂态仿真模型。Step 1. According to the power grid structure, transmission flow, operation mode, etc. of different development stages of the power system, an electromechanical transient simulation model including a series compensation device is constructed.
步骤2、依据机电暂态仿真模型计算电力系统正常运行时串联补偿装置 的输出功率Qn，获取电力系统在所有发展阶段中该输出功率Qn的最大值Qnmax；并计算电力系统故障时串联补偿装置的输出功率Qf。Step 2: Calculating the output power Q n of the series compensation device during normal operation of the power system according to the electromechanical transient simulation model, obtaining the maximum value Q nmax of the output power Q n of the power system in all development stages; and calculating the series connection of the power system failure The output power Q f of the compensation device.
这里，实际应用时，计算输出功率Qn时，需要输入的参数可以包括：电网结构、电网中的设备、电网中的线路参数、以及串联补偿装置参数等。Here, in actual application, when calculating the output power Q n , the parameters that need to be input may include: a power grid structure, a device in the power grid, a line parameter in the power grid, and a series compensation device parameter.
步骤3、依据输出功率Qnmax和输出功率Qf确定串联补偿装置的额定电流：Step 3. Determine the rated current of the series compensation device according to the output power Q nmax and the output power Q f :
额定电流的电流值大于所述输出功率Qnmax对应的电流值，并满足输出功率Qf的要求。The current value of the rated current is greater than the current value corresponding to the output power Q nmax and satisfies the requirement of the output power Q f .
这里，所述满足输出功率Qf的要求是指：所述额定电流下的串联补偿装置能够承受故障工况下短时输出功率Qf。Here, the requirement that the output power Q f is satisfied means that the series compensation device at the rated current can withstand the short-time output power Q f under a fault condition.
步骤4、依据电力系统在不同发展阶段系统的输送能力确定所述串联补偿装置的额定容抗。Step 4: Determine a rated capacitive reactance of the series compensation device according to a transmission capability of the power system at different development stages.
这里，实际应用时，输送能力可以用在满足电力系统安全稳定运行相关规定的前提下输电线路可输送的最大功率来表征。串联补偿容抗会影响输电线路的输送能力，一般情况下容抗越大，输送能力越大。Here, in practical applications, the transmission capacity can be characterized by the maximum power that the transmission line can deliver under the premise of meeting the relevant regulations of the safe and stable operation of the power system. Series compensation capacitive reactance will affect the transmission capacity of the transmission line. Under normal circumstances, the larger the capacitive reactance, the greater the transmission capacity.
实际应用时，确定串联补偿装置的额定容抗时，可以针对电力系统的不同发展阶段，根据该阶段对输送能力的要求，确定满足对应输送能力要求的最低容抗值，以作为额定容抗。In practical application, when determining the rated capacitive reactance of the series compensating device, the minimum capacitive reactance value that satisfies the corresponding conveying capacity requirement can be determined according to the requirements of the conveying capacity for different development stages of the electric power system, as the rated capacitive reactance.
步骤203：依据需要串联补偿装置进行补偿时的额定电流和额定容抗，优化电力系统在不同发展阶段的串联补偿装置额定参数。Step 203: Optimize the rated current and the rated capacitive reactance when the series compensation device is required for compensation, and optimize the rated parameters of the series compensation device of the power system at different development stages.
这里，本步骤的具体实现可以包括：Here, the specific implementation of this step may include:
步骤1、依据第一发展阶段的串联补偿装置的额定电流IA和第二发展阶段的串联补偿装置的额定电流IB，得到优化后的第一发展阶段的串联补偿装置的额定电流I'A和第二发展阶段的串联补偿装置的额定电流I'B： Step 1. According to the rated current I A of the series compensating device in the first development stage and the rated current I B of the series compensating device in the second development stage, the rated current I′ A of the series compensating device in the optimized first development stage is obtained. And the rated current I' B of the series compensation device of the second development stage:
(1)若
Figure PCTCN2016092280-appb-000005
则I'A＝I'b＝max(IA,Ib)；(1) If
Figure PCTCN2016092280-appb-000005
Then I' A = I' b = max(I A , I b );
(2)若
Figure PCTCN2016092280-appb-000006
则I'A＝IA，I'B＝IB；(2) If
Figure PCTCN2016092280-appb-000006
Then I' A = I A , I' B = I B ;
步骤2、依据第一发展阶段的串联补偿装置的额定容抗XCA和第二发展阶段的串联补偿装置的额定容抗XCB，得到优化后的第一发展阶段的串联补偿装置的额定容抗X'CA和第二发展阶段的串联补偿装置的额定容抗X'CB：Step 2. According to the rated capacitive reactance X CA of the series compensating device in the first development stage and the rated capacitive reactance X CB of the series compensating device in the second development stage, the rated capacitive reactance of the series compensating device in the optimized first development stage is obtained. The rated capacitive reactance X' CB of the X' CA and the series compensation device of the second development stage:
(1)若
Figure PCTCN2016092280-appb-000007
则X'CA＝X'CB＝max(XCA,XCB)；(1) If
Figure PCTCN2016092280-appb-000007
Then X' CA = X' CB = max(X CA , X CB );
(2)若
Figure PCTCN2016092280-appb-000008
则X'CA＝XCA，X'CB＝XCB。(2) If
Figure PCTCN2016092280-appb-000008
Then X' CA = X CA , X' CB = X CB .
步骤204：依据优化后的串联补偿装置额定参数，确定电力系统在不同发展阶段的串联补偿装置电容器扩展方式。Step 204: Determine a capacitor expansion mode of the series compensation device of the power system at different development stages according to the optimized series compensation device rated parameter.
这里，串联补偿装置的电容器组是有多个电容器串并联组成的，串联补偿装置的额定参数变化后，电容器的串联数和并联数也会发生变化，以第一发展阶段的串联补偿装置的额定参数为初始参数，确定第二发展阶段中串联补偿装置电容器扩展方式为：Here, the capacitor bank of the series compensation device is composed of a plurality of capacitors connected in series and in parallel. After the rated parameters of the series compensation device are changed, the series number and the parallel number of the capacitors also change, and the series compensation device of the first development stage is rated. The parameter is an initial parameter, and the capacitor expansion mode of the series compensation device in the second development stage is determined as follows:
(1)若I'B＝I'A且X'CB＝X'CA，则确定不需要扩展串联补偿装置的电容器；(1) If I' B = I' A and X' CB = X' CA , it is determined that it is not necessary to expand the capacitor of the series compensation device;
(2)若X'CB＝X'CA且I'B>I'A，则确定串联补偿装置中电容器增加的串联数和并联数；(2) If X' CB = X' CA and I' B >I' A , determining the number of series and parallel connections of the capacitor in the series compensation device;
(3)若I'B＝I'A且X'CB>X'CA，则确定串联补偿装置中电容器增加的串联数；(3) if I' B = I' A and X' CB >X' CA , determining the number of series connections of the capacitors in the series compensation device;
(4)若I'B>I'A且X'CB>X'CA，则确定串联补偿装置中电容器增加的串联数和并联数。(4) If I' B >I' A and X' CB >X' CA , the number of series and parallel connections of the capacitors in the series compensation device are determined.
步骤205：依据优化后的串联补偿装置额定参数和电力系统在不同发展阶段的电磁暂态仿真模型，计算不同工况条件下串联补偿装置的过电压，依据过电压确定串联补偿装置的过电压保护装置的参数和扩展方式。Step 205: Calculate the overvoltage of the series compensation device under different working conditions according to the optimized rated resistance of the series compensation device and the electromagnetic transient simulation model of the power system at different development stages, and determine the overvoltage protection of the series compensation device according to the overvoltage. Device parameters and extensions.
这里，所述不同工况条件主要考虑电力系统发生单相、多相接地故障 等情况。Here, the different working conditions mainly consider single-phase and multi-phase ground faults in the power system. Waiting for the situation.
本实施例中所述过电压保护装置的参数包括：MOV额定电压、MOV额定容量、间隙动作电压、阻尼回路的电阻值和电感值。The parameters of the overvoltage protection device in this embodiment include: MOV rated voltage, MOV rated capacity, gap operating voltage, resistance value of the damping circuit, and inductance value.
当电力系统的发展阶段包括第一发展阶段和第二发展阶段时，依据过电压确定串联补偿装置的过电压保护装置在电力系统的不同发展阶段的扩展方式包括：When the development phase of the power system includes the first development phase and the second development phase, the extension manner of the overvoltage protection device for determining the series compensation device according to the overvoltage in different development stages of the power system includes:
1、MOV1, MOV
如图1所示的MOV是多个由阀片串并联组成的，其中串联数由额定电压决定，MOV容量则由阀片总数决定。该额定电压由串联补偿装置的额定参数确定，当串联补偿装置的额定参数变化后，该额定电压发生变化，从而可以依据不同发展阶段的额定电压和容量确定第一发展阶段的阀片串联数和并联数，以及第二发展阶段的阀片串联数和并联数。The MOV shown in Fig. 1 is composed of a plurality of valve strings connected in series, wherein the number of series is determined by the rated voltage, and the MOV capacity is determined by the total number of the valves. The rated voltage is determined by the rated parameter of the series compensating device. When the rated parameter of the series compensating device changes, the rated voltage changes, so that the number of valve series in the first development stage can be determined according to the rated voltage and capacity of different development stages. The number of parallel connections, as well as the number of series and parallel connections of the valve in the second development stage.
本实施例中依据MOV额定电压和MOV额定容量确定第一发展阶段中MOV的阀片串联数S1和阀片并联数P1，以及第二发展阶段中MOV的阀片串联数S2和阀片并联数P2，则第二发展阶段中对MOV进行扩展的阀片串联数S1'＝S2-S1，阀片并联数P2'＝P2。In this embodiment, the valve series connection number S1 and the valve piece parallel number P1 of the MOV in the first development stage are determined according to the MOV rated voltage and the MOV rated capacity, and the valve series connection number S2 and the valve plate parallel number of the MOV in the second development stage are determined. P2, in the second development stage, the number of valve series connected to the MOV is S1'=S2-S1, and the number of valve plates is P2'=P2.
2、阻尼回路2, damping circuit
如图3所示，阻尼回路由电阻和电感组成。其中电感值与MOV电容器的额定参数相关，电阻值与电感值相关。As shown in Figure 3, the damping loop consists of a resistor and an inductor. The inductance value is related to the rated parameter of the MOV capacitor, and the resistance value is related to the inductance value.
本实施例中依据电阻值和电感值确定第一发展阶段阻尼回路的放电谐振频率f1和第二发展阶段阻尼回路的放电谐振频率f2，则依据所述放电谐振频率f1和放电谐振频率f2的差值确定第二发展阶段中对阻尼回路进行扩展需要的电感值，并依据该电感值得到对阻尼回路进行扩展需要的电阻值；In this embodiment, the discharge resonance frequency f1 of the first development stage damping circuit and the discharge resonance frequency f2 of the second development stage damping circuit are determined according to the resistance value and the inductance value, according to the difference between the discharge resonance frequency f1 and the discharge resonance frequency f2. The value determines an inductance value required to expand the damping circuit in the second development stage, and obtains a resistance value required to expand the damping circuit according to the inductance value;
3、放电间隙 3, discharge gap
放电间隙的放电电压随着串联补偿装置的额定参数变化而变化。在放电间隙设计是需要考虑不同发展阶段放电电压的要求，因此本实施例中串联补偿装置的过电压保护装置的放电间隙为可调节式并联间隙，满足不同发展阶段对放电电压的要求。The discharge voltage of the discharge gap varies with the rated parameters of the series compensation device. In the discharge gap design, it is necessary to consider the discharge voltage requirements of different development stages. Therefore, the discharge gap of the overvoltage protection device of the series compensation device in this embodiment is an adjustable parallel gap, which satisfies the requirements of the discharge voltage in different development stages.
最后应当说明的是：所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。 Finally, it should be noted that the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Claims (5)

  1. 一种额定参数可调整的串联补偿装置确定方法，所述方法包括：A method for determining a series compensation device with adjustable parameters, the method comprising:
    确定串联补偿装置所在电力系统的发展阶段；Determining the development stage of the power system in which the series compensation device is located;
    确定所述电力系统在不同发展阶段需要串联补偿装置进行补偿时的额定电流和额定容抗；Determining a rated current and a rated capacitive reactance when the power system requires a series compensation device for compensation at different stages of development;
    依据需要串联补偿装置进行补偿时的额定电流和额定容抗，优化电力系统在不同发展阶段的串联补偿装置额定参数；According to the rated current and rated capacitive reactance when the series compensation device is required for compensation, the rated parameters of the series compensation device of the power system at different development stages are optimized;
    依据优化后的串联补偿装置额定参数，确定电力系统在不同发展阶段的串联补偿装置电容器扩展方式；Determining the capacitor expansion mode of the series compensation device of the power system at different development stages according to the optimized series compensation device rated parameter;
    依据所述优化后的串联补偿装置额定参数和电力系统在不同发展阶段的电磁暂态仿真模型，计算不同工况条件下串联补偿装置的过电压，依据所述过电压确定串联补偿装置的过电压保护装置的参数和扩展方式。According to the optimized series compensation device rated parameter and the electromagnetic transient simulation model of the power system at different development stages, the overvoltage of the series compensation device under different working conditions is calculated, and the overvoltage of the series compensation device is determined according to the overvoltage The parameters and expansion methods of the protection device.
  2. 如权利要求1所述的额定参数可调整的串联补偿装置确定方法，其中，所述确定串联补偿装置的额定电流和额定容抗，包括：The rated parameter adjustable series compensating device determining method according to claim 1, wherein the determining the rated current and the rated capacitive reactance of the series compensating device comprises:
    构建电力系统的机电暂态仿真模型；Constructing an electromechanical transient simulation model of the power system;
    依据所述机电暂态仿真模型计算电力系统正常运行时串联补偿装置的输出功率Qn，获取电力系统在所有发展阶段中该输出功率Qn的最大值Qnmax；并计算电力系统故障时串联补偿装置的输出功率Qf；Calculating the output power Q n of the series compensation device during normal operation of the power system according to the electromechanical transient simulation model, obtaining the maximum value Q nmax of the output power Q n of the power system in all development stages; and calculating the series compensation when the power system is faulty The output power of the device Q f ;
    依据所述输出功率Qnmax和输出功率Qf确定所述串联补偿装置的额定电流；Determining a rated current of the series compensation device according to the output power Q nmax and the output power Q f ;
    依据所述电力系统在不同发展阶段系统的输送能力确定所述串联补偿装置的额定容抗；其中，Determining a rated capacitive reactance of the series compensation device according to a transmission capability of the power system in different development stages; wherein
    依据所述输出功率Qnmax和输出功率Qf确定所述串联补偿装置的额定电流时，所述额定电流的电流值大于所述输出功率Qnmax对应的电流值，并满足输出功率Qf的要求。 Determining the rated current of the series compensation device according to the output power Q nmax and the output power Q f , the current value of the rated current is greater than the current value corresponding to the output power Q nmax , and meets the requirement of the output power Q f .
  3. 如权利要求1所述的额定参数可调整的串联补偿装置确定方法，其中，所述电力系统的发展阶段包括第一发展阶段和第二发展阶段；所述依据需要串联补偿装置进行补偿时的额定电流和额定容抗，优化电力系统在不同发展阶段的串联补偿装置额定参数，包括：The method for determining a rated parameter adjustable series compensation device according to claim 1, wherein the development phase of the power system comprises a first development phase and a second development phase; and the rating is based on a compensation required by the series compensation device Current and rated capacitive reactance, optimizing the series compensation device rated parameters of the power system at different stages of development, including:
    依据所述第一发展阶段的串联补偿装置的额定电流IA和第二发展阶段的串联补偿装置的额定电流IB，得到优化后的第一发展阶段的串联补偿装置的额定电流I'A和第二发展阶段的串联补偿装置的额定电流I'B：According to the rated current I A of the series compensating device in the first development stage and the rated current I B of the series compensating device in the second development stage, the rated current I′ A of the series compensating device in the optimized first development stage is obtained. The rated current I' B of the series compensation device of the second development stage:
    (1)若
    Figure PCTCN2016092280-appb-100001
    则I'A＝I′b＝max(IA,Ib)；    (1) If
    Figure PCTCN2016092280-appb-100001
    Then I' A = I' b = max(I A , I b );
    (2)若
    Figure PCTCN2016092280-appb-100002
    则I'A＝IA，I'B＝IB；    (2) If
    Figure PCTCN2016092280-appb-100002
    Then I' A = I A , I' B = I B ;
    依据所述第一发展阶段的串联补偿装置的额定容抗XCA和第二发展阶段的串联补偿装置的额定容抗XCB，得到优化后的第一发展阶段的串联补偿装置的额定容抗X'CA和第二发展阶段的串联补偿装置的额定容抗X'CB：According to the rated capacitive reactance X CA of the series compensating device in the first development stage and the rated capacitive reactance X CB of the series compensating device in the second development stage, the rated capacitive reactance X of the series compensating device in the optimized first development stage is obtained. The rated capacitive reactance X' CB of the series compensation device of CA and the second development stage:
    (1)若
    Figure PCTCN2016092280-appb-100003
    则X'CA＝X'CB＝max(XCA,XCB)；    (1) If
    Figure PCTCN2016092280-appb-100003
    Then X' CA = X' CB = max(X CA , X CB );
    (2)若
    Figure PCTCN2016092280-appb-100004
    则X'CA＝XCA，X'CB＝XCB。    (2) If
    Figure PCTCN2016092280-appb-100004
    Then X' CA = X CA , X' CB = X CB .
  4. 如权利要求1所述的额定参数可调整的串联补偿装置确定方法，其中，所述电力系统的发展阶段包括第一发展阶段和第二发展阶段，优化后的串联补偿装置额定参数包括第一发展阶段的串联补偿装置的额定电流I'A和第二发展阶段的串联补偿装置的额定电流I'B，以及第一发展阶段的串联补偿装置的额定容抗X'CA和第二发展阶段的串联补偿装置的额定容抗X'CB，所述依据优化后的串联补偿装置额定参数，确定电力系统在不同发展阶段的串联补偿装置电容器扩展方式包括：The rated parameter adjustable series compensation device determining method according to claim 1, wherein the development phase of the power system comprises a first development phase and a second development phase, and the optimized series compensation device rated parameters include the first development The rated current I' A of the series compensating device of the stage and the rated current I' B of the series compensating device of the second development stage, and the rated capacitive reactance X' CA of the series compensating device of the first development stage and the series connection of the second development stage The rated capacitive reactance X' CB of the compensation device is determined according to the optimized series compensation device rated parameters, and the capacitor expansion manner of the series compensation device for determining the power system at different stages of development includes:
    (1)若I'B＝I'A且X'CB＝X'CA，则确定不需要扩展串联补偿装置的电容器； (1) If I' B = I' A and X' CB = X' CA , it is determined that it is not necessary to expand the capacitor of the series compensation device;
    (2)若X'CB＝X'CA且I'B>I'A，则确定串联补偿装置中电容器增加的串联数和并联数；(2) If X' CB = X' CA and I' B >I' A , determining the number of series and parallel connections of the capacitor in the series compensation device;
    (3)若I'B＝I'A且X'CB>X'CA，则确定串联补偿装置中电容器增加的串联数；(3) if I' B = I' A and X' CB >X' CA , determining the number of series connections of the capacitors in the series compensation device;
    (4)若I'B>I'A且X'CB>X'CA，则确定串联补偿装置中电容器增加的串联数和并联数。(4) If I' B >I' A and X' CB >X' CA , the number of series and parallel connections of the capacitors in the series compensation device are determined.
  5. 如权利要求1所述的额定参数可调整的串联补偿确定方法，其中，所述过电压保护装置的参数包括：MOV额定电压、MOV额定容量、间隙动作电压、阻尼回路的电阻值和电感值；The rated parameter adjustable series compensation determining method according to claim 1, wherein the parameters of the overvoltage protection device include: a MOV rated voltage, a MOV rated capacity, a gap operating voltage, a resistance value of the damping circuit, and an inductance value;
    所述电力系统的发展阶段包括第一发展阶段和第二发展阶段，依据所述过电压确定串联补偿装置的过电压保护装置的扩展方式包括：The development phase of the power system includes a first development phase and a second development phase, and an extension manner of determining an overvoltage protection device of the series compensation device according to the overvoltage includes:
    依据所述MOV额定电压和MOV额定容量确定第一发展阶段中MOV的阀片串联数S1和阀片并联数P1，以及第二发展阶段中MOV的阀片串联数S2和阀片并联数P2，则第二发展阶段中对MOV进行扩展的阀片串联数S1'＝S2-S1，阀片并联数P2'＝P2；Determining the valve series number S1 and the valve piece parallel number P1 of the MOV in the first development stage according to the MOV rated voltage and the MOV rated capacity, and the valve serial number S2 and the valve piece parallel number P2 of the MOV in the second development stage, Then in the second development stage, the number of valve series connected to the MOV is expanded S1'=S2-S1, and the number of valve plates connected in parallel is P2'=P2;
    依据所述电阻值和电感值确定第一发展阶段阻尼回路的放电谐振频率f1和第二发展阶段阻尼回路的放电谐振频率f2，则依据所述放电谐振频率f1和放电谐振频率f2的差值确定第二发展阶段中对阻尼回路进行扩展需要的电感值，并依据确定的电感值得到对阻尼回路进行扩展需要的电阻值；Determining, according to the resistance value and the inductance value, the discharge resonance frequency f1 of the first development stage damping circuit and the discharge resonance frequency f2 of the second development stage damping circuit, according to the difference between the discharge resonance frequency f1 and the discharge resonance frequency f2 In the second development stage, the inductance value required for expanding the damping circuit is obtained, and the resistance value required for expanding the damping circuit is obtained according to the determined inductance value;
    所述过电压保护装置的放电间隙为可调节式并联间隙。 The discharge gap of the overvoltage protection device is an adjustable parallel gap.
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