摘要
为了提高继电保护整定计算的准确性及保护动作的正确性,结合110 kV线路接地故障整定计算工作中出现的问题,对零序电流补偿系数的取值进行了分析,对接地距离保护在110 kV变压器中低压侧越级动作的情况进行了分析,同时对零序电流I段保护的方式选择及线路互感对零序电流I段保护的影响进行了计算及分析,按照分析结果提出了具体建议,保障了继电保护整定计算的准确性。
For improving the accuracy of relay setting calculation ＆ the validity of relay operation, conlbined with the problems existed in earthed fault setting calculation for 110 kV transmission line, the value selection of zero sequence current compensation coefficient is analyzed. The paper also analyses the skip action of earthed distance protection in 110 kV transformer mid-low voltage side, selection of zero sequence current section Ⅰ protection, effect of mutual induction upon zero sequence current section Ⅰ protection. Specific suggestion is given for ensuring the accuracy the relay setting calculation.
出处
《陕西电力》
2008年第9期69-71,共3页
Shanxi Electric Power
