WO2022166268A1 - Igct-based controllable reactive power compensation device topology and control method therefor - Google Patents

Igct-based controllable reactive power compensation device topology and control method therefor Download PDF

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WO2022166268A1
WO2022166268A1 PCT/CN2021/126795 CN2021126795W WO2022166268A1 WO 2022166268 A1 WO2022166268 A1 WO 2022166268A1 CN 2021126795 W CN2021126795 W CN 2021126795W WO 2022166268 A1 WO2022166268 A1 WO 2022166268A1
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controllable
module
reactive power
compensation device
igct
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PCT/CN2021/126795
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French (fr)
Chinese (zh)
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范彩云
黄永瑞
韩坤
王宇丁
张坤
胡秋玲
刘堃
袁洪涛
王帅卿
洪波
邵珠柯
田颀
刘官
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许继集团有限公司
许继电气股份有限公司
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Publication of WO2022166268A1 publication Critical patent/WO2022166268A1/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
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
    • 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 power grid operation control, in particular to an IGCT-based controllable reactive power compensation device topology and a control method thereof.
  • the power compensation for the power transmission system is mainly to control the voltage, improve the maximum transmission capacity of the power transmission network and improve the stability of the power system operation.
  • Most of the power compensation of the power distribution system belongs to the compensation of the load, mainly to control the reactive power, improve the power factor of the load, and improve the power quality.
  • the common method of reactive power compensation is to use thyristor to switch capacitors, and to realize the input and removal of capacitors by controlling the conduction of the thyristor of the semi-controlled device;
  • the main disadvantage of this compensation method is that the thyristor device can only control its opening, but cannot control its opening. turn off (forced off with an external voltage), so precise control of the compensation power cannot be achieved.
  • the purpose of the embodiments of the present invention is to provide an IGCT-based controllable reactive power compensation device topology and a control method thereof.
  • IGCT full control characteristics of IGCT, it can control both its turn-on and its turn-off, and can control the input in real time. And the precise moment of removing the capacitor to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage.
  • making full use of IGCT has the advantages of reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, which greatly improves the reliability of the controllable reactive power compensation device.
  • a first aspect of the embodiments of the present invention provides an IGCT-based controllable reactive power compensation device topology, including: a capacitor module, an inductor, and a controllable module;
  • the inductor is connected in series with the capacitor module
  • the capacitor module includes: a fixed capacitor unit and a controllable capacitor unit connected in series, and the controllable capacitor unit is connected in parallel with the controllable module;
  • the controllable module bypasses the controllable capacitor unit when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power compensation capacity of the compensation device and thereby stabilize the line voltage, which is also used in the AC transmission. After the line fault disappears and the line voltage recovers to the preset upper limit value of the voltage, the controllable capacitor unit is put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
  • the topology of the controllable reactive power compensation device based on IGCT further includes: a protection module;
  • the protection module is connected in parallel with the capacitor module.
  • controllable module includes: a current limiting resistor, a saturable reactor and an integrated gate commutated thyristor subunit connected in series.
  • the gate commutated thyristor subunit includes: two groups of integrated gate commutated thyristor subunits connected in antiparallel.
  • the IGCT is a reverse resistance type integrated gate commutated thyristor.
  • the second aspect of the embodiments of the invention provides an IGCT-based controllable reactive power compensation device topology control method, and controlling any of the above-mentioned IGCT-based controllable reactive power compensation device topology, including the following steps:
  • the controllable capacitor unit is bypassed by the controllable module to increase the reactive power compensation capacity of the compensation device, thereby stabilizing the line voltage;
  • the controllable module is controlled to maintain the current operating state.
  • the method further includes:
  • the controllable module is controlled to put the controllable capacitor unit back into operation, so as to reduce the reactive power compensation capacity of the compensation device;
  • the controllable module is controlled to maintain the current operating state.
  • IGCT full control characteristics
  • it can control both its turn-on and its turn-off, and the precise timing of switching on and off the capacitor can be controlled in real time, so as to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage.
  • making full use of the advantages of IGCT such as reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, greatly improves the reliability of the controllable reactive power compensation device and further improves the transmission network. Maximum transmission capacity and stability of the power system.
  • FIG. 1 is a schematic diagram of the topology principle of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for topology control of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a topology principle of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention.
  • a first aspect of the embodiments of the present invention provides an IGCT-based controllable reactive power compensation device topology, including: a capacitor module, an inductor, and a controllable module.
  • the inductor and the capacitor module are connected in series.
  • the capacitor module includes: a fixed capacitor unit C1 and a controllable capacitor unit C2 connected in series, and the controllable capacitor unit C2 is connected in parallel with the controllable module.
  • the controllable module bypasses the controllable capacitor unit C2 when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power compensation capacity of the compensation device and stabilize the line voltage. It also disappears and the line voltage recovers after the AC transmission line failure After reaching the preset upper limit value of the voltage, the controllable capacitor unit C2 is put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
  • the above technical solution utilizes the full control characteristics of the IGCT, which can control both its turn-on and its turn-off, and can control the precise timing of switching on and off the capacitor in real time, so as to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage.
  • making full use of the advantages of IGCT such as reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, greatly improves the reliability of the controllable reactive power compensation device and further improves the transmission network. Maximum transmission capacity and stability of the power system.
  • the topology of the IGCT-based controllable reactive power compensation device further includes: a protection module.
  • the protection module is connected in parallel with the capacitor module. When overvoltage occurs in the AC bus, the arrester in the protection module will show low impedance characteristics, limit the overvoltage level of the bus, and protect the capacitor body, inductance and control module.
  • controllable module includes: a current limiting resistor R, a saturable reactor L and an integrated gate commutated thyristor subunit connected in series.
  • the gate commutated thyristor subunit includes: two groups of integrated gate commutated thyristor subunits connected in anti-parallel.
  • the above-mentioned IGCT is a reverse resistance type integrated gate commutated thyristor.
  • the integrated gate commutated thyristor sub-unit IGCT1 and the integrated gate commutated thyristor sub-unit IGCT2 in the controllable module are in a blocking state, and both the fixed capacitor unit C1 and the controllable capacitor unit C2 are put into operation In the power grid system; the arrester in the protection module is in a high impedance state and basically does not absorb energy.
  • the integrated gate commutated thyristor subunit IGCT1 and the integrated gate commutated thyristor subunit IGCT2 in the controllable module are controlled to be in a conducting state, and the controllable capacitor unit C2 passes through the resistance
  • the controllable capacitor unit C2 passes through the resistance
  • the current limiting resistor R can limit the high frequency oscillation between the controllable part capacitor C2 and the stray inductance of the control module loop when the integrated gate commutated thyristor sub-unit IGCT is turned on, so as to avoid the integrated gate commutated thyristor sub-unit IGCT Damaged due to excessive loop oscillation voltage.
  • the saturable reactor L can limit the current rise rate of the integrated gate commutated thyristor subunit IGCT at the moment of turning on, and ensure the safe conduction of the integrated gate commutated thyristor subunit IGCT.
  • the controllable module plays the role of bypassing the controllable capacitor unit C2.
  • the capacitor module only the fixed capacitor unit C1 is put into the power grid system to increase the reactive power. Compensate the role of capacity.
  • the controllable capacitor unit C2 can be put back into the power grid. Since the integrated gate commutated thyristor sub-unit IGCT is a turn-off device, the switching of the controllable capacitor unit C2 can be controlled at any time, and finally the effect of precise control of reactive power compensation can be achieved.
  • FIG. 2 is a flowchart of a method for topology control of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention.
  • a second aspect of the embodiment of the present invention provides an IGCT-based controllable reactive power compensation device topology control method, and controls any of the above-mentioned IGCT-based controllable reactive power compensation device topologies, including follows the steps below:
  • the controllable capacitor unit C2 is bypassed through the controllable module to increase the reactive power compensation capacity of the compensation device, thereby stabilizing the line voltage.
  • the controllable module is controlled to maintain the current running state.
  • controllable capacitance unit C2 after bypassing the controllable capacitance unit C2 by the controllable module, it also includes:
  • S720 Determine whether the line voltage is greater than or equal to a preset upper limit value of the voltage.
  • controllable module controls the controllable capacitor unit C2 to be put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
  • the controllable module is controlled to maintain the current running state.
  • the embodiments of the present invention aim to protect an IGCT-based controllable reactive power compensation device topology and a control method, including: a capacitor module, an inductor and a controllable module; the inductor and the capacitor module are connected in series; the capacitor module includes: a series connection The fixed capacitor unit and the controllable capacitor unit are connected in parallel with the controllable module; the controllable module bypasses the controllable capacitor unit when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power of the compensation device
  • the power compensation capacity then stabilizes the line voltage, and it also re-enters the controllable capacitor unit after the AC transmission line fault disappears and the line voltage returns to the preset value, so as to reduce the reactive power compensation capacity of the compensation device.
  • the above technical solution has the following effects:
  • IGCT full control characteristics
  • it can control both its turn-on and its turn-off, and the precise timing of switching on and off the capacitor can be controlled in real time, so as to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage.
  • making full use of the advantages of IGCT such as reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, greatly improves the reliability of the controllable reactive power compensation device and further improves the transmission network. Maximum transmission capacity and stability of the power system.

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

Abstract

Disclosed are an IGCT-based controllable reactive power compensation device topology and a control method therefor. Said device topology comprises: a capacitor module, an inductor and a controllable module; the inductor is connected to the capacitor module in series; the capacitor module comprises a fixed capacitor unit and a controllable capacitor unit connected in series, the controllable capacitor unit being connected to the controllable module in parallel; and the controllable module bypasses the controllable capacitor unit when a line voltage is reduced due to a failure of an alternating current power transmission line, so as to increase the reactive power compensation capacity of the compensation device and further stabilize the line voltage, and after the failure of the alternating current power transmission line disappears and the line voltage recovers to a preset voltage upper limit value, the controllable capacitor unit is put into use again, so as to reduce the reactive power compensation capacity of the compensation device. By using the full-control characteristic of an IGCT, both turning-on and turning-off thereof can be controlled, and the precise moments of put-into-use and removal of a capacitor can be controlled in real time, so as to compensate for the reactive power requirement of a grid system in real time and stabilize an alternating current bus voltage.

Description

一种基于IGCT的可控无功功率补偿装置拓扑及其控制方法A topology of controllable reactive power compensation device based on IGCT and its control method 技术领域technical field
本发明涉及电网运行控制技术领域，特别涉及一种基于IGCT的可控无功功率补偿装置拓扑及其控制方法。The invention relates to the technical field of power grid operation control, in particular to an IGCT-based controllable reactive power compensation device topology and a control method thereof.
背景技术Background technique
在电力供电***中，为提升电网的安全可靠性，通常需要增设大量的无功功率补偿装置。对于输电***的功率补偿主要是为了控制电压，提高输电网络的最大传输能力和提高电力***运行的稳定性。配电***的功率补偿大多属于负荷的补偿，主要是控制无功，提高负荷的功率因数，改善电能质量。In the power supply system, in order to improve the safety and reliability of the power grid, it is usually necessary to add a large number of reactive power compensation devices. The power compensation for the power transmission system is mainly to control the voltage, improve the maximum transmission capacity of the power transmission network and improve the stability of the power system operation. Most of the power compensation of the power distribution system belongs to the compensation of the load, mainly to control the reactive power, improve the power factor of the load, and improve the power quality.
无功功率补偿常见方式是采用晶闸管投切电容器，通过控制半控型器件晶闸管的导通来实现电容器的投入与切除；该补偿方法的主要缺点是由于晶闸管器件只能控制其开通，无法控制其关断(利用外部电压来强迫关断)，因此无法实现补偿功率的精准控制。The common method of reactive power compensation is to use thyristor to switch capacitors, and to realize the input and removal of capacitors by controlling the conduction of the thyristor of the semi-controlled device; the main disadvantage of this compensation method is that the thyristor device can only control its opening, but cannot control its opening. turn off (forced off with an external voltage), so precise control of the compensation power cannot be achieved.
发明内容SUMMARY OF THE INVENTION
本发明实施例的目的是提供一种基于IGCT的可控无功功率补偿装置拓扑及其控制方法，通过利用IGCT的全控特性，既能控制其开通又能控制其关断，能实时控制投入和切除电容的精确时刻，以实时补偿电网***的无功功率需求，稳定交流母线电压。同时，充分利用IGCT具有通压降低、损耗小、耐受di/dt能力强、故障浪涌电流大等优势，大大提升了可控无功功率补偿装置的可靠性。The purpose of the embodiments of the present invention is to provide an IGCT-based controllable reactive power compensation device topology and a control method thereof. By utilizing the full control characteristics of IGCT, it can control both its turn-on and its turn-off, and can control the input in real time. And the precise moment of removing the capacitor to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage. At the same time, making full use of IGCT has the advantages of reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, which greatly improves the reliability of the controllable reactive power compensation device.
为解决上述技术问题，本发明实施例的第一方面提供了一种基于IGCT的可控无功功率补偿装置拓扑，包括：电容模块、电感和可控模块；In order to solve the above technical problems, a first aspect of the embodiments of the present invention provides an IGCT-based controllable reactive power compensation device topology, including: a capacitor module, an inductor, and a controllable module;
所述电感与所述电容模块串连连接；the inductor is connected in series with the capacitor module;
所述电容模块包括：串联连接的固定电容单元和可控电容单元，所述可控电容单元与所述可控模块并联连接；The capacitor module includes: a fixed capacitor unit and a controllable capacitor unit connected in series, and the controllable capacitor unit is connected in parallel with the controllable module;
所述可控模块在交流输电线路故障导致线路电压降低时将所述可控电容单元旁路，以增大补偿装置的无功功率补偿容量进而稳定所述线路电压，其还在所述交流输电线路故障消失且所述线路电压恢复至电压预设上限值后将所述可控电容单元重新投入，以减小所述补偿装置的无功功率补偿容量。The controllable module bypasses the controllable capacitor unit when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power compensation capacity of the compensation device and thereby stabilize the line voltage, which is also used in the AC transmission. After the line fault disappears and the line voltage recovers to the preset upper limit value of the voltage, the controllable capacitor unit is put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
进一步地，基于IGCT的可控无功功率补偿装置拓扑还包括：保护模块；Further, the topology of the controllable reactive power compensation device based on IGCT further includes: a protection module;
所述保护模块与所述电容模块并联连接。The protection module is connected in parallel with the capacitor module.
进一步地，所述可控模块包括：串联连接的限流电阻、饱和电抗器和集成门极换流晶闸管子单元。Further, the controllable module includes: a current limiting resistor, a saturable reactor and an integrated gate commutated thyristor subunit connected in series.
进一步地，所述门极换流晶闸管子单元包括：两组反向并联的集成门极换流晶闸管子单元。Further, the gate commutated thyristor subunit includes: two groups of integrated gate commutated thyristor subunits connected in antiparallel.
进一步地，所述IGCT为逆阻型集成门极换流晶闸管。Further, the IGCT is a reverse resistance type integrated gate commutated thyristor.
相应地，发明实施例的第二方面提供了一种基于IGCT的可控无功功率补偿装置拓扑控制方法，控制上述任一基于IGCT的可控无功功率补偿装置拓扑，包括如下步骤：Correspondingly, the second aspect of the embodiments of the invention provides an IGCT-based controllable reactive power compensation device topology control method, and controlling any of the above-mentioned IGCT-based controllable reactive power compensation device topology, including the following steps:
获取交流输电线路的线路电压；Obtain the line voltage of the AC transmission line;
判断所述线路电压是否小于电压预设下限值；judging whether the line voltage is less than the preset lower limit value of the voltage;
如所述线路电压小于所述电压预设下限值，则通过可控模块将所述可控电容单元旁路，以增大补偿装置的无功功率补偿容量，进而稳定所述线路电压；If the line voltage is less than the preset lower limit value of the voltage, the controllable capacitor unit is bypassed by the controllable module to increase the reactive power compensation capacity of the compensation device, thereby stabilizing the line voltage;
如所述线路电压大于或等于所述电压预设下限值，则控制所述可控模块保持当前运行状态。If the line voltage is greater than or equal to the voltage preset lower limit value, the controllable module is controlled to maintain the current operating state.
进一步地，所述通过可控模块将所述可控电容单元旁路之后，还包括：Further, after the controllable capacitor unit is bypassed by the controllable module, the method further includes:
继续检测所述交流输电线路的所述线路电压；continue to detect the line voltage of the AC transmission line;
判断所述线路电压是否大于或等于电压预设上限值；judging whether the line voltage is greater than or equal to a preset upper limit value of the voltage;
如所述线路电压大于或等于所述电压预设上限值，则控制所述可控模块将所述可控电容单元重新投入，以减小所述补偿装置的无功功率补偿容量；If the line voltage is greater than or equal to the preset upper limit value of the voltage, the controllable module is controlled to put the controllable capacitor unit back into operation, so as to reduce the reactive power compensation capacity of the compensation device;
如所述线路电压小于所述电压预设上限值，则控制所述可控模块保持当前运行状态。If the line voltage is less than the preset upper limit value of the voltage, the controllable module is controlled to maintain the current operating state.
本发明实施例的上述技术方案具有如下有益的技术效果：The above-mentioned technical solutions of the embodiments of the present invention have the following beneficial technical effects:
通过利用IGCT的全控特性，既能控制其开通又能控制其关断，能实时控制投入和切除电容的精确时刻，以实时补偿电网***的无功功率需求，稳定交流母线电压。同时，充分利用IGCT具有通压降低、损耗小、耐受di/dt能力强、故障浪涌电流大等优势，大大提升了可控无功功率补偿装置的可靠性，并进一步提高了输电网络的最大传输能力及电力***的稳定性。By using the full control characteristics of IGCT, it can control both its turn-on and its turn-off, and the precise timing of switching on and off the capacitor can be controlled in real time, so as to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage. At the same time, making full use of the advantages of IGCT, such as reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, greatly improves the reliability of the controllable reactive power compensation device and further improves the transmission network. Maximum transmission capacity and stability of the power system.
附图说明Description of drawings
图1是本发明实施例提供的基于IGCT的可控无功功率补偿装置拓扑原理示意图；1 is a schematic diagram of the topology principle of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention;
图2是本发明实施例提供的基于IGCT的可控无功功率补偿装置拓扑控制方法流程图。FIG. 2 is a flowchart of a method for topology control of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明了，下面结合具体实施方式并参照附图，对本发明进一步详细说明。应该理解，这些描述只是示例性的，而并非要限制本发明的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本发明的概念。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.
图1是本发明实施例提供的基于IGCT的可控无功功率补偿装置拓扑原理示意图。FIG. 1 is a schematic diagram of a topology principle of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention.
请参照图1，本发明实施例的第一方面提供一种基于IGCT的可控无功 功率补偿装置拓扑，包括：包括：电容模块、电感和可控模块。电感与电容模块串连连接。电容模块包括：串联连接的固定电容单元C1和可控电容单元C2，可控电容单元C2与可控模块并联连接。可控模块在交流输电线路故障导致线路电压降低时将可控电容单元C2旁路，以增大补偿装置的无功功率补偿容量进而稳定线路电压，其还在交流输电线路故障消失且线路电压恢复至电压预设上限值后将可控电容单元C2重新投入，以减小补偿装置的无功功率补偿容量。Referring to Fig. 1 , a first aspect of the embodiments of the present invention provides an IGCT-based controllable reactive power compensation device topology, including: a capacitor module, an inductor, and a controllable module. The inductor and the capacitor module are connected in series. The capacitor module includes: a fixed capacitor unit C1 and a controllable capacitor unit C2 connected in series, and the controllable capacitor unit C2 is connected in parallel with the controllable module. The controllable module bypasses the controllable capacitor unit C2 when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power compensation capacity of the compensation device and stabilize the line voltage. It also disappears and the line voltage recovers after the AC transmission line failure After reaching the preset upper limit value of the voltage, the controllable capacitor unit C2 is put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
上述技术方案通过利用IGCT的全控特性，既能控制其开通又能控制其关断，能实时控制投入和切除电容的精确时刻，以实时补偿电网***的无功功率需求，稳定交流母线电压。同时，充分利用IGCT具有通压降低、损耗小、耐受di/dt能力强、故障浪涌电流大等优势，大大提升了可控无功功率补偿装置的可靠性，并进一步提高了输电网络的最大传输能力及电力***的稳定性。The above technical solution utilizes the full control characteristics of the IGCT, which can control both its turn-on and its turn-off, and can control the precise timing of switching on and off the capacitor in real time, so as to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage. At the same time, making full use of the advantages of IGCT, such as reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, greatly improves the reliability of the controllable reactive power compensation device and further improves the transmission network. Maximum transmission capacity and stability of the power system.
具体的，基于IGCT的可控无功功率补偿装置拓扑还包括：保护模块。保护模块与电容模块并联连接。当交流母线中出现过电压时，保护模块中的避雷器会呈现低阻抗特性，限制母线的过电压水平，起到保护电容本体、电感及控制模块的作用。Specifically, the topology of the IGCT-based controllable reactive power compensation device further includes: a protection module. The protection module is connected in parallel with the capacitor module. When overvoltage occurs in the AC bus, the arrester in the protection module will show low impedance characteristics, limit the overvoltage level of the bus, and protect the capacitor body, inductance and control module.
在本发明实施例的一个具体实施方式中，可控模块包括：串联连接的限流电阻R、饱和电抗器L和集成门极换流晶闸管子单元。In a specific implementation manner of the embodiment of the present invention, the controllable module includes: a current limiting resistor R, a saturable reactor L and an integrated gate commutated thyristor subunit connected in series.
可选的，门极换流晶闸管子单元包括：两组反向并联的集成门极换流晶闸管子单元。Optionally, the gate commutated thyristor subunit includes: two groups of integrated gate commutated thyristor subunits connected in anti-parallel.
具体的，上述IGCT为逆阻型集成门极换流晶闸管。Specifically, the above-mentioned IGCT is a reverse resistance type integrated gate commutated thyristor.
如图1所示，本基于IGCT的可控无功功率补偿装置拓扑的具体工作过程如下：As shown in Figure 1, the specific working process of this IGCT-based controllable reactive power compensation device topology is as follows:
当电网正常运行，交流母线电压稳定，可控模块中的集成门极换流晶闸管子单元IGCT1和集成门极换流晶闸管子单元IGCT2处于闭锁状态，固定电容单元C1和可控电容单元C2均投入电网***中；保护模块中的避雷 器处于高阻抗状态，基本不吸收能量。当电网中出现故障，交流母线电压出现跌落时，控制可控模块中的集成门极换流晶闸管子单元IGCT1和集成门极换流晶闸管子单元IGCT2处于导通状态，可控电容单元C2通过电阻向集成门极换流晶闸管子单元IGCT放电，由于限流电阻R阻值较小，电容C2上的电压瞬时可降为零。同时，限流电阻R可以限制集成门极换流晶闸管子单元IGCT开通瞬间时可控部分电容C2与控制模块回路杂散电感之间出现的高频震荡，避免集成门极换流晶闸管子单元IGCT因回路震荡电压过高而损坏。饱和电抗器L可以限制开通瞬间集成门极换流晶闸管子单元IGCT的电流上升率，保障集成门极换流晶闸管子单元IGCT安全导通。由于集成门极换流晶闸管子单元IGCT处于导通状态，因此可控模块起到旁路可控电容单元C2的作用，电容模块中只有固定电容单元C1投入电网***，达到了增大无功功率补偿容量的作用。When the power grid is running normally and the AC bus voltage is stable, the integrated gate commutated thyristor sub-unit IGCT1 and the integrated gate commutated thyristor sub-unit IGCT2 in the controllable module are in a blocking state, and both the fixed capacitor unit C1 and the controllable capacitor unit C2 are put into operation In the power grid system; the arrester in the protection module is in a high impedance state and basically does not absorb energy. When there is a fault in the power grid and the AC bus voltage drops, the integrated gate commutated thyristor subunit IGCT1 and the integrated gate commutated thyristor subunit IGCT2 in the controllable module are controlled to be in a conducting state, and the controllable capacitor unit C2 passes through the resistance When discharging to the integrated gate commutated thyristor sub-unit IGCT, due to the small resistance value of the current limiting resistor R, the voltage on the capacitor C2 can instantly drop to zero. At the same time, the current limiting resistor R can limit the high frequency oscillation between the controllable part capacitor C2 and the stray inductance of the control module loop when the integrated gate commutated thyristor sub-unit IGCT is turned on, so as to avoid the integrated gate commutated thyristor sub-unit IGCT Damaged due to excessive loop oscillation voltage. The saturable reactor L can limit the current rise rate of the integrated gate commutated thyristor subunit IGCT at the moment of turning on, and ensure the safe conduction of the integrated gate commutated thyristor subunit IGCT. Since the integrated gate commutated thyristor sub-unit IGCT is in the conducting state, the controllable module plays the role of bypassing the controllable capacitor unit C2. In the capacitor module, only the fixed capacitor unit C1 is put into the power grid system to increase the reactive power. Compensate the role of capacity.
当交流***故障消失，母线电压恢复稳定后，通过闭锁可控模块中的集成门极换流晶闸管子单元IGCT，可以使可控电容单元C2重新投入电网中。由于集成门极换流晶闸管子单元IGCT是可关断器件，因此，可以在任意时刻控制可控电容单元C2的投切，最终达到精准控制无功补偿的作用。When the AC system fault disappears and the bus voltage becomes stable, by blocking the integrated gate commutated thyristor sub-unit IGCT in the controllable module, the controllable capacitor unit C2 can be put back into the power grid. Since the integrated gate commutated thyristor sub-unit IGCT is a turn-off device, the switching of the controllable capacitor unit C2 can be controlled at any time, and finally the effect of precise control of reactive power compensation can be achieved.
图2是本发明实施例提供的基于IGCT的可控无功功率补偿装置拓扑控制方法流程图。FIG. 2 is a flowchart of a method for topology control of an IGCT-based controllable reactive power compensation device provided by an embodiment of the present invention.
相应地，请参照图2，发明实施例的第二方面提供了一种基于IGCT的可控无功功率补偿装置拓扑控制方法，控制上述任一基于IGCT的可控无功功率补偿装置拓扑，包括如下步骤：Correspondingly, referring to FIG. 2 , a second aspect of the embodiment of the present invention provides an IGCT-based controllable reactive power compensation device topology control method, and controls any of the above-mentioned IGCT-based controllable reactive power compensation device topologies, including Follow the steps below:
S200，获取交流输电线路的线路电压。S200, acquiring the line voltage of the AC transmission line.
S400，判断线路电压是否小于电压预设下限值。S400, determine whether the line voltage is less than a preset lower limit value of the voltage.
S600，如线路电压小于电压预设下限值，则通过可控模块将可控电容单元C2旁路，以增大补偿装置的无功功率补偿容量，进而稳定线路电压。S600, if the line voltage is less than the preset lower limit value of the voltage, the controllable capacitor unit C2 is bypassed through the controllable module to increase the reactive power compensation capacity of the compensation device, thereby stabilizing the line voltage.
S800，如线路电压大于或等于电压预设下限值，则控制可控模块保持 当前运行状态。S800, if the line voltage is greater than or equal to the voltage preset lower limit value, the controllable module is controlled to maintain the current running state.
进一步地，通过可控模块将可控电容单元C2旁路之后，还包括：Further, after bypassing the controllable capacitance unit C2 by the controllable module, it also includes:
S710，继续检测交流输电线路的线路电压。S710, continue to detect the line voltage of the AC transmission line.
S720，判断线路电压是否大于或等于电压预设上限值。S720: Determine whether the line voltage is greater than or equal to a preset upper limit value of the voltage.
S730，如线路电压大于或等于电压预设上限值，则控制可控模块将可控电容单元C2重新投入，以减小补偿装置的无功功率补偿容量。S730 , if the line voltage is greater than or equal to the preset upper limit value of the voltage, the controllable module controls the controllable capacitor unit C2 to be put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
S740，如线路电压小于电压预设上限值，则控制可控模块保持当前运行状态。S740, if the line voltage is less than the preset upper limit value of the voltage, the controllable module is controlled to maintain the current running state.
本发明实施例旨在保护一种基于IGCT的可控无功功率补偿装置拓扑及其控制方法，包括：电容模块、电感和可控模块；电感与电容模块串连连接；电容模块包括：串联连接的固定电容单元和可控电容单元，可控电容单元与可控模块并联连接；可控模块在交流输电线路故障导致线路电压降低时将可控电容单元旁路，以增大补偿装置的无功功率补偿容量进而稳定线路电压，其还在交流输电线路故障消失且线路电压恢复至预设值后将可控电容单元重新投入，以减小补偿装置的无功功率补偿容量。上述技术方案具备如下效果：The embodiments of the present invention aim to protect an IGCT-based controllable reactive power compensation device topology and a control method, including: a capacitor module, an inductor and a controllable module; the inductor and the capacitor module are connected in series; the capacitor module includes: a series connection The fixed capacitor unit and the controllable capacitor unit are connected in parallel with the controllable module; the controllable module bypasses the controllable capacitor unit when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power of the compensation device The power compensation capacity then stabilizes the line voltage, and it also re-enters the controllable capacitor unit after the AC transmission line fault disappears and the line voltage returns to the preset value, so as to reduce the reactive power compensation capacity of the compensation device. The above technical solution has the following effects:
通过利用IGCT的全控特性，既能控制其开通又能控制其关断，能实时控制投入和切除电容的精确时刻，以实时补偿电网***的无功功率需求，稳定交流母线电压。同时，充分利用IGCT具有通压降低、损耗小、耐受di/dt能力强、故障浪涌电流大等优势，大大提升了可控无功功率补偿装置的可靠性，并进一步提高了输电网络的最大传输能力及电力***的稳定性。By using the full control characteristics of IGCT, it can control both its turn-on and its turn-off, and the precise timing of switching on and off the capacitor can be controlled in real time, so as to compensate the reactive power demand of the grid system in real time and stabilize the AC bus voltage. At the same time, making full use of the advantages of IGCT, such as reduced on-voltage, low loss, strong di/dt tolerance, and large fault surge current, greatly improves the reliability of the controllable reactive power compensation device and further improves the transmission network. Maximum transmission capacity and stability of the power system.
应当理解的是，本发明的上述具体实施方式仅仅用于示例性说明或解释本发明的原理，而不构成对本发明的限制。因此，在不偏离本发明的精神和范围的情况下所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。此外，本发明所附权利要求旨在涵盖落入所附权利要求范围和边界、或者这种范围和边界的等同形式内的全部变化和修改例。It should be understood that the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, but not to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of this invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.

Claims (7)

  1. 一种基于IGCT的可控无功功率补偿装置拓扑，其特征在于，包括：电容模块、电感和可控模块；An IGCT-based controllable reactive power compensation device topology, characterized in that it includes: a capacitor module, an inductor and a controllable module;
    所述电感与所述电容模块串连连接；the inductor is connected in series with the capacitor module;
    所述电容模块包括：串联连接的固定电容单元和可控电容单元，所述可控电容单元与所述可控模块并联连接；The capacitor module includes: a fixed capacitor unit and a controllable capacitor unit connected in series, and the controllable capacitor unit is connected in parallel with the controllable module;
    所述可控模块在交流输电线路故障导致线路电压降低时将所述可控电容单元旁路，以增大补偿装置的无功功率补偿容量进而稳定所述线路电压，其还在所述交流输电线路故障消失且所述线路电压恢复至电压预设上限值后将所述可控电容单元重新投入，以减小所述补偿装置的无功功率补偿容量。The controllable module bypasses the controllable capacitor unit when the AC transmission line failure causes the line voltage to decrease, so as to increase the reactive power compensation capacity of the compensation device and thereby stabilize the line voltage, which is also used in the AC transmission. After the line fault disappears and the line voltage recovers to the preset upper limit value of the voltage, the controllable capacitor unit is put into operation again, so as to reduce the reactive power compensation capacity of the compensation device.
  2. 根据权利要求1所述的基于IGCT的可控无功功率补偿装置拓扑，其特征在于，还包括：保护模块；The IGCT-based controllable reactive power compensation device topology according to claim 1, further comprising: a protection module;
    所述保护模块与所述电容模块并联连接。The protection module is connected in parallel with the capacitor module.
  3. 根据权利要求1所述的基于IGCT的可控无功功率补偿装置拓扑，其特征在于，The IGCT-based controllable reactive power compensation device topology according to claim 1, wherein,
    所述可控模块包括：串联连接的限流电阻、饱和电抗器和集成门极换流晶闸管子单元。The controllable module includes: a current limiting resistor, a saturable reactor and an integrated gate commutated thyristor subunit connected in series.
  4. 根据权利要求3所述的基于IGCT的可控无功功率补偿装置拓扑，其特征在于，The IGCT-based controllable reactive power compensation device topology according to claim 3, wherein,
    所述门极换流晶闸管子单元包括：两组反向并联的集成门极换流晶闸管子单元。The gate commutated thyristor subunit includes: two groups of integrated gate commutated thyristor subunits connected in anti-parallel.
  5. 根据权利要求1-4任一项所述的基于IGCT的可控无功功率补偿装置拓扑，其特征在于，The IGCT-based controllable reactive power compensation device topology according to any one of claims 1-4, wherein,
    所述IGCT为逆阻型集成门极换流晶闸管。The IGCT is a reverse resistance type integrated gate commutated thyristor.
  6. 一种基于IGCT的可控无功功率补偿装置拓扑控制方法，其特征在 于，控制权利要求1-5任一所述的基于IGCT的可控无功功率补偿装置拓扑，包括如下步骤：An IGCT-based controllable reactive power compensation device topology control method is characterized in that, controlling the IGCT-based controllable reactive power compensation device topology described in any of claims 1-5, comprising the steps:
    获取交流输电线路的线路电压；Obtain the line voltage of the AC transmission line;
    判断所述线路电压是否小于电压预设下限值；judging whether the line voltage is less than the preset lower limit value of the voltage;
    如所述线路电压小于所述电压预设下限值，则通过可控模块将所述可控电容单元旁路，以增大补偿装置的无功功率补偿容量，进而稳定所述线路电压；If the line voltage is less than the preset lower limit value of the voltage, the controllable capacitor unit is bypassed by the controllable module to increase the reactive power compensation capacity of the compensation device, thereby stabilizing the line voltage;
    如所述线路电压大于或等于所述电压预设下限值，则控制所述可控模块保持当前运行状态。If the line voltage is greater than or equal to the voltage preset lower limit value, the controllable module is controlled to maintain the current operating state.
  7. 根据权利要求6所述的基于IGCT的可控无功功率补偿装置拓扑控制方法，其特征在于，所述通过可控模块将所述可控电容单元旁路之后，还包括：The IGCT-based topology control method for a controllable reactive power compensation device according to claim 6, wherein after bypassing the controllable capacitor unit through the controllable module, the method further comprises:
    继续检测所述交流输电线路的所述线路电压；continue to detect the line voltage of the AC transmission line;
    判断所述线路电压是否大于或等于电压预设上限值；judging whether the line voltage is greater than or equal to a preset upper limit value of the voltage;
    如所述线路电压大于或等于所述电压预设上限值，则控制所述可控模块将所述可控电容单元重新投入，以减小所述补偿装置的无功功率补偿容量；If the line voltage is greater than or equal to the preset upper limit value of the voltage, the controllable module is controlled to put the controllable capacitor unit back into operation, so as to reduce the reactive power compensation capacity of the compensation device;
    如所述线路电压小于所述电压预设上限值，则控制所述可控模块保持当前运行状态。If the line voltage is less than the preset upper limit value of the voltage, the controllable module is controlled to maintain the current operating state.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402058A (en) * 1992-12-09 1995-03-28 General Electric Co. Method and apparatus for controlling discharge of a thyristor-switched capacitor
CN101621203A (en) * 2008-07-02 2010-01-06 美国超导体公司 Static var corrector
CN202856362U (en) * 2012-05-09 2013-04-03 黄河科技学院 Switching of capacitor groups in series controlled by thyristor of reactive power compensator
CN113346510A (en) * 2021-02-04 2021-09-03 许继集团有限公司 Controllable reactive power compensation device topology based on IGCT and control method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200947544Y (en) * 2006-01-20 2007-09-12 李志学 High voltage integrated adjustable capacitor type power reactive compensator
CN201656456U (en) * 2010-03-12 2010-11-24 华东电力试验研究院有限公司 Supergrid short-circuit current limiting device
CN103457257B (en) * 2013-08-16 2016-08-10 国家电网公司 A kind of MTDC transmission system dc circuit breaker and control method thereof
CN103618321A (en) * 2013-12-03 2014-03-05 青岛市恒顺电气股份有限公司 Reactive compensating capacitor device
ES2853976T3 (en) * 2014-10-08 2021-09-20 Siemens Energy Global Gmbh & Co Kg Inverter arrangement with short-circuit unit and procedure for disconnecting an alternating voltage line
CN204668938U (en) * 2015-06-02 2015-09-23 南京南瑞继保电气有限公司 Mixed DC fault treating apparatus, Hybrid HVDC system
CN207117188U (en) * 2017-07-13 2018-03-16 中国电建集团华东勘测设计研究院有限公司 A kind of circuit series compensation structure
BR112020024313A2 (en) * 2018-05-28 2021-05-11 Nr Electric Co., Ltd. compensator, control method and respective device
CN110943461A (en) * 2019-11-25 2020-03-31 国网辽宁省电力有限公司本溪供电公司 Intelligent integrated power distribution device applied to low-voltage transformer area and method thereof
CN214798883U (en) * 2021-02-04 2021-11-19 许继集团有限公司 Controllable reactive power compensation device topological structure based on IGCT

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402058A (en) * 1992-12-09 1995-03-28 General Electric Co. Method and apparatus for controlling discharge of a thyristor-switched capacitor
CN101621203A (en) * 2008-07-02 2010-01-06 美国超导体公司 Static var corrector
CN202856362U (en) * 2012-05-09 2013-04-03 黄河科技学院 Switching of capacitor groups in series controlled by thyristor of reactive power compensator
CN113346510A (en) * 2021-02-04 2021-09-03 许继集团有限公司 Controllable reactive power compensation device topology based on IGCT and control method thereof

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