10kV系统TV高压保险频繁熔断事故的分析与仿真  

Analysis on Frequent Fusing Accident of HV Fuse of Voltage Transformer in 10 kV System and Its Simulation

作　　者：董家读[1] 黄庆 何跃 张红涛[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]绵阳电业局,四川绵阳621000 [3]四川省电子技术研究中心,四川成都610031

出　　处：《四川电力技术》2009年第5期83-85,共3页Sichuan Electric Power Technology

摘　　要：在中性点不接地系统中,经常发生电磁式电压互感器(TV)高压保险熔断现象,严重影响了电力系统的安全可靠性,以往把TV高压保险熔断的原因归结为铁磁谐振,通过对一起TV高压保险熔断事故的分析,得出TV保险熔断的根本原因是故障恢复时电容放电引起的低频振荡电流,在M atlab/S imu link上的仿真结果验证了理论分析的正确性。In non - ground neutral system, high - voltage fuse breaking of electromagnetic voltage transformer （TV） often takes place, which may severely influence the security and reliability of the power system. In the past, the reason for high - voltage fuse breaking of TV comes down to the ferromagnetic resonance, but through analyzing a fuse breaking case, it is found that the real reason for high - voltage fuse breaking of TV is the low - frequency oscillation current when the failure recovers. The simulation results validate the correctness of theory analysis on Matlab/Simulink.

关 键 词：电压互感器 高压保险熔断 铁磁谐振 低频振荡电流 

分 类 号：TM764[电气工程—电力系统及自动化]