带高抗500kV长线路合闸引起的电流直流偏置问题及应对措施  

Research on Direct Current Offset Caused by Switching on 500kV Long-Distance Transmission Lines With High Voltage Shunt Reactors and Its Countermeasures

作　　者：杜宁[1] 徐瑞林[2] 项祖涛[1] 韩彬[1] 韩亚楠[1] 周佩朋[1] 陈涛[2] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]重庆市电力公司电力科学研究院,重庆市渝北区401123

出　　处：《电网技术》2012年第12期200-204,共5页Power System Technology

摘　　要：以重庆电网张家坝—隆盛带高抗500kV长线路为研究对象,通过电磁暂态仿真,研究了典型线路合分闸操作时的电流直流偏置问题,包括不同合闸相位进行各种合分闸联动操作时的电流直流偏置情况。此外还研究了采用合闸电阻及控制相角合闸技术抑制电流直流偏置的效果,结果表明,采用这2种方法可以加快电流过零,降低电流延迟过零出现的概率,但并不能完全消除电流过零延迟现象,对此进行了讨论并给出了建议。Taking 500kV long-distance transmission line with shunt HV reactors from Zhangjiaba to Rongsheng in Chongqing power grid as research object, the direct current offsets caused＇ by switching on the transmission line, including direct current offset situations during various linked switching on/off operations under different closing phase angles, are researched by electromagnetic transient simulation. Besides, the effects of restricting direct current offset by adopting closing resistance and phase selection switching technology are researched. Research results show that using the two countermeasures although the current zero-crossing can be accelerated and the probability of occurring current zero-crossing delay can be decreased, the current zero-crossing delay cannot be fully eliminated, so the discussion on this problem is carried out and related suggestion is proposed.

关 键 词：高压并联电抗器 长线路 电流直流偏置 

分 类 号：TM72[电气工程—电力系统及自动化]