摘要
35 kV中性点不接地系统在三相运行参数不对称时,电压互感器时常发生铁磁谐振。提出在35 kV母线接入一组电容器,同时在电压互感器一次侧绕组中性线中串接一个电感线圈。运行结果表明,采取的技术措施可有效抑制变压器中性点的电压位移和电压互感器高压侧熔断器的熔断问题,保证了电能计量、电压保护、对地绝缘监测及指示仪表的正常运行。
The ferromagnetic resonance of voltage transformer often occurs when the three- phase operation parameters are asymmetric in 35 k V neutral point ungrounding system. This paper proposed the access to a group of capacitor in in 35 k V generatrix,and a inductance coil was tandem connection in primary winding of voltage transformer.The operation results show the technical measures effectively restrain the voltage displacement of transformer neutral point and fusing problem of voltage transformer high voltage side. It can ensure the normal operation of energy metering,voltage protection,ground insulation monitoring,and indicating instrument.
出处
《现代建筑电气》
2015年第2期22-25,共4页
Modern Architecture Electric
关键词
中性点不接地系统
电压互感器
铁磁谐振
技术措施
neutral point ungrounding system
voltage transformer
ferromagnetic resonance
technical measures
