电抗器间隔断路器后置式接线所引起二次问题研究

500 kV变电站35 kV侧接线方式有多种,投运较早的500 kV变电站35 kV电抗器间隔常采用断路器后置式接线方式。这种接线方式虽在一定程度上节省了成本,但同时造成了二次上的一些问题。结合华东地区500 kV某变电站一起35 kV电抗器故障实例,分析了由于断路器后置式接线方式所引起的二次问题,包括故障相判别错误、相邻电抗器间隔低电流保护误动、保护持续动作不返回。最后针对上述问题提出了相应的应对措施。...

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Published in电力系统保护与控制 Vol. 42; no. 18; pp. 122 - 126
Main Author 陈昊 邓广静 王玉荣 孟玮
Format Journal Article
LanguageChinese
Published 江苏省电力公司检修分公司,江苏 南京 210000 2014
东南大学电气工程学院,江苏 南京 210096%江苏省电力设计院,江苏 南京,211012%东南大学电气工程学院,江苏 南京,210096%江苏省电力公司检修分公司,江苏 南京,210000
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ISSN1674-3415

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Summary:500 kV变电站35 kV侧接线方式有多种,投运较早的500 kV变电站35 kV电抗器间隔常采用断路器后置式接线方式。这种接线方式虽在一定程度上节省了成本,但同时造成了二次上的一些问题。结合华东地区500 kV某变电站一起35 kV电抗器故障实例,分析了由于断路器后置式接线方式所引起的二次问题,包括故障相判别错误、相邻电抗器间隔低电流保护误动、保护持续动作不返回。最后针对上述问题提出了相应的应对措施。
Bibliography:41-1401/TM
reactor; breaker rear-wiring; undercurrent protection; fault phase selection logic
Several types of wirings at the 35 kV side are carried out in the practical 500 kV substations. Breaker rear-wiring is often adopted in the 35 kV reactors intervals of 500 kV substation which was put into operation earlier. This type of wiring can save cost to some degree. However, it can cause secondary side problems. Based on a practical instance of 35 kV reactor failure in a 500 kV substation in East China, the secondary side problems, including failure of fault phase selection, misoperation of undercurrent protection and no-returning after protection operation, caused by the breaker rear-wiring are analyzed. Finally, the corresponding countermeasures are provided.
CHEN Hao,DENG Guang-jing,WANG Yu-rong,MENG Wei(1. Jiangsu Electric Power Maintenance Branch Company, Nanjing 210000, China; 2. School of Electrical Engineering, Southeast University, Nanjing 210096, China; 3. Jiangsu Power Design Institute, Nanjing 211012,
ISSN:1674-3415