配电网电压互感器铁磁谐振的特点与抑制  

Characteristics and suppression of ferro-resonance of electromagnetic PT in distribution network

作　　者：翁利民[1] 陈灵欣 靳剑峰[3] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]安阳市供电局,河南安阳455000 [3]郑州电力高等专科学校,河南郑州450004

出　　处：《继电器》2004年第20期40-42,共3页Relay

摘　　要：从电磁式电压互感器铁芯饱和引起的铁磁谐振的机理出发,介绍了铁磁谐振的特点与危害,重点对抑制铁磁谐振的常见实用方法作了分析,并得出了结论:对10kV中性点绝缘系统,采用在PT一次侧中性点串接电阻型消谐器是比较成功的,其结构简单,安装方便;35kV系统由于一般出线较长,增装消弧线圈是有效的,对系统的安全运行十分有利。Core saturation of electromagnetic PT will result in ferro-resonance. On this basis, this paper analyses its characteristics, harmfulness, and general suppression methods respectively. With method analysing, this paper reaches to its conclusion that in 10 kV neutral-isolated system, neutral serial connecting resistance-based resonance suppression device on PT primary side is acceptable because of its simpleness and easy installation. Adding arc-suppression coil in long-outlet-line 35 kV system is effective, which can ensure the system stable operation.

关 键 词：铁磁谐振 配电网 电磁式电压互感器 中性点绝缘系统 接电 铁芯 消弧线圈 特点 结论 出线 

分 类 号：TM451[电气工程—电器] TM864