摘要
对某大型抽水蓄能电站接地电阻超标的原因进行了分析,通过现场调研,将上水库可利用的区域分成6部分,针对这6个区域和下水库不同的地形、地质条件,参照规程并结合常用的降阻措施进行分析,找到合适的方法进行降阻改造。计算分析及现场测试表明,经过接地改造后的接地电阻值降低到规程要求值以下,同时满足最大跨步电压和热稳定性要求。
The reasons of the exceeded grounding resistance in a large pumped storage power are analyzed, and the available area in the upper reservoir, through the field survey, is divided into 6 parts. The paper ana- lyzes the six parts, different topographic and geologic conditions of the 6 regions of the lower reservoir, and it refers to regulations and commonly used resistance reduction measures for analysis to find a suitable method for reducing resistance retrofit. Analysis of results and field-tests showed that after grounding reconstruction the grounding resistance value is reduced to required value, meanwhile the maximum step voltage and ther- mal stability requirements are met.
出处
《浙江电力》
2013年第3期5-8,共4页
Zhejiang Electric Power
关键词
抽水蓄能电站
接地电阻
跨步电压
降阻措施
pumped storage power station
grounding resistance
step voltage
resistance reduction measures