摘要
从中性点不接地的电力系统中的绝缘监测功能单元及铁磁谐振角度出发,对安装消谐电阻器后引起电磁式电压互感器星三角接线二次侧三相电压不平衡现象进行了详细的分析和计算,得出了不平衡的一些原因及误差范围,并提出了改进措施,在实际使用中取得了较好的效果。
Detailed analysis and calculation were made on electromagnetic voltage transformer for the unbalance appearance at the secondary side three-phase voltage after installation of resistor for ferroresonance eliminating from insulation monitoring unit and ferroresonance in neutral isolated power system, with results showing some causes of unbalance and scope of errors, and improvement measures were raised which achieve better effect in actual use.
关键词
电压互感器
绝缘监测线路
铁磁谐振
零序电压
不平衡现象
分析和计算
voltage transformer
insulation monitoring circuit
ferroresonance
zero sequence voltage
unbalance appearance
analysis and calculation
