500kV岩平线过电压问题分析和对策

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2010年第4卷增刊1 
2010,Vo1.4,Supplement 1 
南方电网技术 技术论坛二等奖论文 

SOUTHERN POWER SYSTEM TECHNOLOGY Articles of 2“d Grade Award in Forum 

文章编号:1674.0629(2010)S1—0055一o1 中图分类号:TM721 文献标志码:A 

500 kV岩平线过电压问题分析和对策★ 
刘蔚 ,蔡汉生 ,夏小飞 
(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) 

摘要:对500kV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。 
关键词:非全相运行;工频谐振;过电压;高压电抗器 

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

LIU Wei ,CAI Hansheng ,XIA Xiaofei 
(1.Guangxi Power Grid Electric Power Research Institute,Nanning 530023,China; 
2.Electric Power Research Institute,CSG.,Guangzhou 5 1 0080,China) 

Abstract: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. 
Key words:non—full phase operation;power frequency resonance;overvoltag e;high voltage shunt reactor 


广西电力,2010(4):1-4 
程师,博士,主要从事输配电网计算和分析工作(e-mail)liu w.sy@gx csg.ca。