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基于正余弦分量检测的高压直流换相失败预防方法 被引量:159

A METHOD BASED ON THE SIN-COS COMPONENTS DETECTION MITIGATES COMMUTATION FAILURE IN HVDC
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摘要 分析了高压直流(HVCD)换相失败的机理及发生换相失败的原因,介绍了三?广直流输电工程换相失败预测控制模块,针对其中u0检测在交流电压过零时故障启动慢和abc-αβ坐标变换在三相故障时不能有效地预防换相失败的问题,提出了一种基于sin-cos分量检测的改进方法,并利用PSCAD/EMTDC软件建立了双馈入直流系统模型,该方法将单相交流电压分解为两个以基波频率旋转的分量,可快速地判断交流系统故障,一旦检测到故障,立即减小触发角,从而增加换相裕度,避免换相失败的发生。仿真结果表明:该方法能够在单相接地故障和三相故障时有效地减少多馈入直流系统发生换相失败的几率。 The mechanism of commutation failure of DC-AC converter was studied and the theory of commutation failure prediction control module of Three Gorges-Guangdong HVDC system was analysed. The u0 detector of CFPREV acts very slowly upon crossing zero of AC voltage and under the condition of three-phase faults abc-αβ transformation detection has very limited improvement of commutation failure, a new method based on an idea of sin-cos components detector is presented to mitigate commutation failure in multi-infeed HVDC systems.This method predicts quickly ac faults in terms of two components on the rotational reference frame synchronized with the ac system frequency. After detecting the fault, an additional angle is deduced from the firing order at the inverter station, which in practice enlarges the commutation margin. A dual-infeed HVDC model based on PSCAD/EMTDC is built and the simulation results show that it is very effective in reducing the probability of commutation failure in MIDC.
出处 《中国电机工程学报》 EI CSCD 北大核心 2005年第14期1-6,共6页 Proceedings of the CSEE
关键词 电力系统 高压直流输电 换相失败 正弦-余弦分量检测 PSCAD/EMTDC软件 Power system HVDC Commutation failure Sin-cos components detect PSCAD/EMTDC software
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  • 1张保会,康小宁,袁越,葛耀中,张友,王钢,陶家琪.关于电力系统安全稳定控制装置(系统)基本要求的再探讨[J].电力系统自动化,1995,19(9):60-64. 被引量:21
  • 2陈永红,薛禹胜.用EEAC和专家系统技术计及模型影响以在线刷新紧急控制决策表[J].电网技术,1996,20(1):7-9. 被引量:7
  • 3.DL755-2001.电力系统稳定导则[s].,..
  • 4[8]Prabha Kunder.Power System Stability and Control.Prabha Kunder.Power System Stability and Control[M].北京:中国电力出版社,2001,12.
  • 5[12]J.Rittiger.Digital simulation of HVDC transmission and its correlation to simulator studies.IEE Conference Publication Number 345:414-416.
  • 6[13]P.Lehn,J.Rittiger,B.Kulicke.Comparison of the ATP version of EMTP and the NETOMAC program for simulation of HVDC systems.IEEE Transactions on Power Delivery,1995,10(4):2048-2053.
  • 7[1]Szechtman M, Pilotto L A S, Ping W W, et al. The behavior of several HVDC links terminating in the same load area [C]. CIGRE Paper 14-201, Paris, 1992.
  • 8[2]Szechtman M, Wess T, Thio C V, et al. First benchmark model for HVDC control studies [J]. Electra, 1991, 135: 54-67.
  • 9[3]Yang W D,Xu Z,Han Z X Transient stability enhancement of AC power system by nonlinear modulation control of multi-infeed HADC systems[C].Proceedings of the International Conference on Power Systems(ICPS 2001),September 12-16,2001,Wuhan,China: 345-350
  • 10[4]Pai M A Computer techniques in power system analysis [M]. NewDelhi : Tata McGraw-Hill Publishing Company Limited , 1979.

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