摘要
南宁网区中性点不接地系统中 ,曾由于电磁式电压互感器 (以下简称 PT)的非线性励磁电感和网络对地电容形成匹配 ,在一定条件下引起铁磁谐振过电压 ,造成 PT保险熔断 ,PT烧损 ,避雷器爆炸 ,甚至母线短路等事故 ,严重地影响了系统的安全运行。关于铁磁谐振问题 ,国内外不少专家学者都对于这种谐振的形成机理进行了许多的试验研究 ,提出了一系列防止和抑制消除这种过电压的措施 。
In the neutral point nonearthing system of Nanning network area, ferro resonance over voltage due to matching of non linear exciting inductance of PT and network to earth capacitance once happened, resulting in accidents such as the fusing of PT fusion, the damage to PT and explosion of lightning arrester, even the short circuit of bus bar All these bring hazards to the safety operation of the system Foreign and domestic experts did many experiments and studies on ferro resonance and proposed a number of prevention measures,which played an effective role in the operation of power system
出处
《广西电力工程》
2000年第4期62-65,共4页
Guangxi Electric Power Engineering
关键词
铁磁谐振
过电压
消谐措施
电磁式电压互感器
ferro resonance
overvoltage
resonance suppression measures
application
