|
|
|
| Fault analysis of secondary zero-sequence voltage abnormal fluctuation of 110kV capacitive voltage transformer |
| HAN Muyao1, LUO Haowen2, LIU Aoyang2, LIAO Xuan2, WANG Kaixin2 |
1. China Three Gorges University, Yichang, Hubei 443002;
2. Jingmen Power Supply Company, State Grid Hubei Power Electric Co., Ltd, Jingmen, Hubei 448200 |
|
|
|
|
Abstract This paper analyzes the abnormal fluctuation of secondary zero-sequence voltage in 110kV capacitive voltage transformer. By viewing the field fault record waveforms and checking the condition of the secondary voltage loop voltage transformer, it is found that the fault is caused by insulation breakdown between the terminal N of the voltage transformer and the open triangular winding (secondary zero-sequence voltage loop). The discharge current generated in the primary side of the voltage transformer circulates in the open triangular winding, which causes abnormal fluctuation of the secondary zero-sequence voltage. In view of the problems exposed by this incident, some thoughts and suggestions on routine inspection of secondary equipment are given at last.
|
|
Received: 16 December 2020
|
|
|
|
| Cite this article: |
|
HAN Muyao,LUO Haowen,LIU Aoyang等. Fault analysis of secondary zero-sequence voltage abnormal fluctuation of 110kV capacitive voltage transformer[J]. Electrical Engineering, 2021, 22(12): 53-56.
|
|
|
|
| URL: |
|
http://dqjs.cesmedia.cn/EN/Y2021/V22/I12/53
|
[1] 罗皓文, 严文洁, 廖玄, 等. 一起断线引起主变间隙保护临界动作案例分析[J]. 电气技术, 2019, 20(12): 108-111.
[2] 赵琛, 赵晓东. 一起二次电压畸变引起的保护动作事故分析[J]. 电气技术, 2016, 17(9): 145-146.
[3] 张志东, 刘建月, 李秀广. 电容式电压互感器阻尼装置故障测试试验分析[J]. 电气技术, 2017, 18(4): 149-152.
[4] 邓得政, 赵若阳. 电压互感器二次断线对三相三线计量的影响分析[J]. 电气技术, 2020, 21(5): 98-102.
[5] 李猷民, 姜建平, 菅有为. 谐波对电磁式互感器测量的影响研究[J]. 电气技术, 2021, 22(2): 36-41.
[6] MENG Zhan, CHEN Qing, LI Hongbin, et al.Internal insulation condition identification for high-voltage capacitor voltage transformers based on possibilistic fuzzy clustering[J]. Review of Scientific Instruments, 2020, 91: 014705.
[7] 杨川, 杨耿杰, 高伟, 等. 10kV配电网内部过电压录波起动判据分析[J]. 电气技术, 2017, 18(10): 36-41.
[8] 李志勇. 外部原因引起的中压电压互感器故障综述[J]. 电工技术, 2020(3): 132-134, 136.
[9] 黄纯, 刘鹏辉, 江亚群. 基于动态时间弯曲距离的主动配电网馈线差动保护[J]. 电工技术学报, 2017, 32(6): 240-247.
[10] 黄繁朝, 房博一, 陈极升. 一起500kV线路CVT二次电压异常的故障分析[J]. 电工技术, 2020(12): 81-83.
[11] 佘立伟. 一起110kV电容式电压互感器异常诊断分析[J]. 电工技术, 2020(11): 85-87.
[12] 林仁杰, 李龙斌. 一起110kV电容式电压互感器异常发热的案例分析[J]. 机电信息, 2019(35): 106-107.
[13] 彭家琦, 冶海平, 戴强. 一起高海拔35kV电容式电压互感器故障浅析[J]. 电气技术, 2019, 20(2): 111-114.
[14] 徐兴发. 变电站电压互感器二次中性点N600接地在线监测装置的研制及应用[J]. 电气技术, 2019, 20(9): 47-51. |
|
|
|
2021, Vol. 22 
