摘要
分析了我国35kV以下的配电网中容易发生电压互感器(PT)铁磁谐振的主要原因,从产生PT铁磁谐振的原理入手,提出了采用伏安特性好的PT,调整系统参数中C与L的配合,将电源中性点改为经接地变压器、消弧线圈接地等方法来消除PT铁磁谐振。
Analysis was made to the main cause of potential transformer （PT） iron-magnetic harmonic vibration which takes place eas- ily in power distribution net of 35 kV below in our country. From the principle of PT with good volt-ampere characteristics, system pa- rameters of capacitance and inductance were adjusted. Neutral point in power was changed as via grounding transformer or arc removal windings grounding to eliminate PT iron-magnetic harmonic vibration.
出处
《电工电气》
2009年第11期40-42,共3页
Electrotechnics Electric
关键词
铁磁谐振
电压互感器
伏安特性
中性点
iron-magnetic harmonic vibration
potential transformer
volt-ampere characteristics
neutral point
