摘要
二滩电站500 k V系统主接线为3/2与4/3混合接线方式,500 k V GIS设备包括断路器、隔离开关、接地刀、TV、TA、母线、设备互联短引线等。主变压器高压侧T区在倒闸操作中,当处于热备用状态时,一般情况下电压较低,三相电压平衡,约120 k V左右;有时电压较高,三相电压不平衡,高的约260 k V左右。该现象对运行操作及二次系统产生了影响。分析该现象属于铁磁谐振现象,对其形成原因作了相应分析,并通过仿真得到了验证。
The main wiring of 500 kV system in Ertan Hydropower Plant is 3/2 and 4/3 mixed mode, and 500 kV GIS devices include breakers, disconnecting switches, earth switches, TV, TA, buses and short approach lines etc. During the switching operation of T area in high voltage side of main transformer, when in the hot standby, generally the voltage is lower, threephase voltage is balance and about 120 kV. But sometimes the voltage is higher, three - phase voltage is unbalance and up to 260 kV, which has an impact on the operation and the second systems. Through the analysis of the phenomenon, it is obtained that it is ferro - resonance phenomenon. The causes for this phenomenon is analyzed and verified by the simulation.
出处
《四川电力技术》
2015年第2期32-34,共3页
Sichuan Electric Power Technology
