互感器励磁特性线性度对铁磁谐振的影响分析

Influences of the Inductive Potential Transfer Magnetizing Characteristics on Ferroresonance

中性点不接地系统中铁磁谐振频繁发生,对电力系统造成了较大损失。实测了三个电压互感器的励磁特性,通过仿真计算,分析了励磁特性对电压互感器发生铁磁谐振的影响情况。在此基础上,对电力不接地系统中应用电磁式电压互感器提出了意见与建议。

Ferroresonance frequently occurs in neutral- unearthed systems in the last years, and has resulted in serious damage. In the study of this paper, the magnetizing characteristics of three Potential Transfers （PTs） were measured. The effect of magnetizing characteristics on ferroresonance was analyzed. Then suggestions have been made on the application of inductive PTs in neutral-unearthed systems.