基于晶闸管的混合式高压直流断路器重合闸控制策略
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摘要
为了解决由于高压直流电网的暂时性故障引起的高压直流断路器误跳闸问题,提高供电的安全性和可靠性,减少停电损失,需要进行混合式直流断路器的自动重合闸研究。选取基于晶闸管的混合式直流断路器作为研究对象,通过对比不同重合方案下断路器的电流转移特性和能量吸收过程,提出了可行的重合闸策略,并利用Matlab/Simulink仿真软件搭建了所述直流断路器电气模型和控制系统验证策略的有效性。仿真结果显示,所提自动重合闸控制策略降低了在重合失败时分断故障电流的操作难度,加快了隔离速度,降低了转移支路晶闸管的电流应力以及避雷器所需要吸收的能量。该方法可以为混合式直流断路器的工程应用提供一定的理论支持和技术支撑。
In order to solve the false tripping problem of high-voltage DC circuit breaker caused by temporary failure of high-voltage DC grid, improve the safety and reliability of power supply, and reduce the loss of power failure, the automatic reclosing research of hybrid DC circuit breaker is necessary. In this paper, the thyristor-based hybrid DC circuit breaker was selected as the research object. By comparing the current transfer characteristics and energy absorption process of the circuit breaker under different coincidence schemes, a feasible reclosing strategy was proposed. Finally, the electrical model and control system of the DC circuit breaker was built in Matlab/Simulink simulation software to verify the validity of the strategy. The simulation results show that the proposed automatic reclosing control strategy reduces the difficulty of breaking the fault current when the coincidence fails, speeds up the isolation speed, reduces the current stress of the branch thyristor and the energy absorbed by the arrester. The method can provide certain theoretical and technical support for the engineering application of the hybrid DC circuit breaker.
In order to solve the false tripping problem of high-voltage DC circuit breaker caused by temporary failure of high-voltage DC grid, improve the safety and reliability of power supply, and reduce the loss of power failure, the automatic reclosing research of hybrid DC circuit breaker is necessary. In this paper, the thyristor-based hybrid DC circuit breaker was selected as the research object. By comparing the current transfer characteristics and energy absorption process of the circuit breaker under different coincidence schemes, a feasible reclosing strategy was proposed. Finally, the electrical model and control system of the DC circuit breaker was built in Matlab/Simulink simulation software to verify the validity of the strategy. The simulation results show that the proposed automatic reclosing control strategy reduces the difficulty of breaking the fault current when the coincidence fails, speeds up the isolation speed, reduces the current stress of the branch thyristor and the energy absorbed by the arrester. The method can provide certain theoretical and technical support for the engineering application of the hybrid DC circuit breaker.
引文
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[15]DAVIDSON C C, WHITEHOUSE R S, BARKER C D, et al. A new ultra-fastHVDCcircuitbreakerformeshedDCnetworks[C]∥IET InternationalConferenceonACandDCPowerTransmission.Birmingham, UK:IET, 2015:1-7.
[2]KIM J Y, CHOI S S, KIM I D. A new reclosing and re-breaking DC thyristor circuit breaker for DC distribution applications[J]. Journal of Power Electronics, 2017, 17(1):272-281.
[3]黄金强,廖敏夫,葛国伟,等.直流微网混合式零电压开关直流断路器[J].高电压技术,2015,41(9):3148-3155.HUANGJinqiang,LIAOMinfu,GEGuowei,etal.Zero-voltage-switch hybrid DC switch for DC microgrid[J]. High Voltage Engineering, 2015, 41(9):3148-3155.
[4]LINW,JOVCICD,NGUEFEUS,etal.Modellingofhigh-power hybridDCcircuitbreakerforgrid-levelstudies[J].IETPowerElectronics, 2016, 9(2):237-246.
[5]CHEN Z, YU Z, ZHANG X, et al. Analysis and experiments for IGBT,IEGT,andIGCTinhybridDCcircuitbreaker[J].IEEETransactions on Industrial Electronics, 2018, 65(4):2883-2892.
[6]谢峰,江道灼,吴振梁,等.混合式直流断路器控制策略及实验验证[J].机电工程,2017,34(3):287-292.XIE Feng, JIANG Daozhuo, WU Zhenliang, et al. Control strategy and experimentalverificationofhybridDCcircuitbreaker[J].Joumalof Mechanical&Electrical Engineering, 2017, 34(3):287-292.
[7]魏晓光,杨兵建,贺之渊,等.级联全桥型直流断路器控制策略及其动态模拟试验[J].电力系统自动化,2016,40(1):129-135. WEI Xiaoguang, YANG Bingjian, HE Zhiyuan, et al. Control strategy andphysicaldynamicsimulationofcascadedfull-bridgeDCcircuit breaker[J].AutomationofElectricPowerSystems,2016,40(1):129-135.
[8]LIY,SHIX,WANGF,etal.DCfaultprotectionofmulti-terminal VSC-HVDC system with hybrid DC circuit breaker[C]∥IEEE Energy Conversion Congress and Exposition. Cincinnati, USA:IEEE, 2016:10-17.
[9]B?SCHED,WILKENINGED,K?PFH,etal.HybridDCcircuit breaker feasibility study[J].IEEE Transactions onComponents Packaging&Manufacturing Technology, 2017, 7(3):354-362.
[10]何俊佳,袁召,赵文婷,等.直流断路器技术发展综述[J].南方电网技术,2015,9(2):9-15.HE Junjia, YUAN Zhao, ZHAO Wenting, et al. Review of DC circuit breaker technology development[J]. Southern Power System Technology, 2015, 9(2):9-15.
[11]史宗谦,贾申利.高压直流断路器研究综述[J].高压电器,2015,51(11):1-9.SHIZongqian,JIAShenli.Researchonhighvoltagedirectcurrent circuit breaker:a review[J]. High Voltage Apparatus, 2015(11):1-9.
[12]魏晓光,高冲,罗湘,等.柔性直流输电网用新型高压直流断路器设计方案[J].电力系统自动化,2013,37(15):95-102.WEIXiaoguang,GAOChong,LUOXiang,etal.Anoveldesignof high-voltage DC circuit breaker in HVDC flexible transmission grid[J].Automation of Electric Power Systems, 2013, 37(15):95-102.
[13]药韬,温家良,李金元,等.基于IGBT串联技术的混合式高压直流断路器方案[J].电网技术,2015,39(9):2484-2489.YAO Tao, WEN Jialiang, LI Jinyuan, et al. A hybrid high voltage DC circuitbreakerdesignplanwithseries-connectedIGBTs[J].Power System Technology, 2015, 39(9):2484-2489.
[14]VANVINHN,SONHI,NGUYENTT,etal.Anoveltopologyof hybrid HVDC circuit breaker for VSC HVDC application[J]. Energies,2017, 10(10):1675-1690.
[15]DAVIDSON C C, WHITEHOUSE R S, BARKER C D, et al. A new ultra-fastHVDCcircuitbreakerformeshedDCnetworks[C]∥IET InternationalConferenceonACandDCPowerTransmission.Birmingham, UK:IET, 2015:1-7.