500kV岩平线过电压问题分析和对策  

Analysis and Countermeasure on Overvoltage Problem in 500 kV Yantan-Pingguo Transmission Line

作　　者：刘蔚[1] 蔡汉生 夏小飞[1] 

机构地区：[1]广西电网公司电力科学研究院,南宁530023 [2]南方电网科学研究院,广州510080

出　　处：《南方电网技术》2010年第A01期55-55,共1页Southern Power System Technology

摘　　要：对500 kV岩平线加装高抗后出现的非全相运行时的工频谐振过电压问题进行了仿真和分析,认为造成岩平线出现过电压的原因主要是高抗补偿度较高、线路未换位造成三相参数不平衡以及高抗中性点电抗取值不合适。提出了解决岩平线过电压问题的技术措施。岩平线按照提出的技术措施进行了改造,改造后的试验结果表明提出的技术措施是有效的。The power frequency resonance overvoltage problem of 500 kV Yantan Power Plant-Pingguo Substation transmission line under non-full phase operation after installation of high voltage shunt reactor is analyzed.Reasons of the overvoltage problem are found which are higher compensation degree of high voltage shunt reactor,un-transposition of the transmission line and improper neutral reactor value of high voltage shunt reactor.Technical measures that the transmission line is transposed and the neutral reactor value is re-chosen are proposed.Yan-ping transmission line is modified based on the proposed measures,and test results after the accomplishment of the modification project show that the proposed technology measure is effective.

关 键 词：非全相运行 工频谐振 过电压 高压电抗器 

分 类 号：TM721[电气工程—电力系统及自动化]