一起4星形電壓互感器零序電壓反充電事故分析
張關應，褚國偉，張雄偉，周志剛
（常州供電公司，江蘇 常州 213000）
摘 要：介紹了一起4 星形電壓互感器零序電壓反充電事故處理過程，并對事故原因進行了分析，該事故因電壓并列回路誤接線引起，在10 kV 系統單相接地時發生。考慮到該事故因變電站擴建時誤接線引起，對類似擴建工程二次施工提出了合理施工方案，以避免類似事故發生。
關鍵詞：4 星形電壓互感器；零序電壓；反充電
中圖分類號：TM451 文獻標識碼：B 文章編號：1007-3175(2016)11-0025-03
Zero Sequence Voltage Anti-Charging Incident Analysis of
4-Star Connection Potential Transformer
ZHANG Guan-ying, CHU Guo-wei, ZHANG Xiong-wei, ZHOU Zhi-gang
（Changzhou Power Supply Company, Changzhou 213000, China）
Abstract: Introduction was made to a case of zero sequence voltage anti-charging incident of 4-star connection potential transformer (PT) and analysis was made to the accident cause. The incident caused by the false wiring of voltage parallel circuit happened when single phase was grounding in 10 kV system. Considering the incident was due to false wiring at the time of substation expansion, this paper proposed the reasonable construction scheme for the secondary circuit construction of similar expansion project to avoid the occurrence of similar incidents.
Key words: 4-star connection potential transformer; zero sequence voltage; anti-charging
參考文獻
[1] 韓瀟，張道乾，楊素梅，韓潔. PT二次電壓回路薄弱環節及改進措施[J]. 電力系統保護與控制，2009，37(5)：89-92.
[2] 孫亞輝，陳志強，蔡衍. 電壓互感器二次回路反充電的原因分析及防范措施[J]. 電力系統保護與控制，2010，38(9)：126-129.
[3] 劉劍勇，胡岸武，朱志杰. 一起電壓互感器反充電事件的分析[J]. 電力系統及其自動化學報，2011，23(2)：81-84.
