摘要
针对电力系统的安全问题,提出了一种基于节点误差网络重构的故障诊断模型,对发、变电站的接地网腐蚀及断电的诊断方法进行研究。将接地网等效成纯电阻电路,运用电网络理论,建立接地网的故障诊断数字模型。充分利用可及节点,对节点电压进行重新构造,在保证重构误差最小的基础上,建立支路电阻方程组,通过最小二乘求出腐蚀后的各条支路的电阻,从而判断出接地网的腐蚀和断点的情况。最后通过实际算例的计算结果来检验算法的正确性,并用于故障诊断中。
A corrosion diagnosis model of grounding grid based on nodes＇ error network reconstruction is proposed. The model has studied the diagnosis method of the grounding grid,which applied the theory of electric network to establish the corrosion diagnosis equation.This method makes full use of the touchable nodes and reconstructs the nodes＇ voltage.Based on least reconstructed error,the branch resistance equation was established.The equation was solved according to Least - Square method,the result of which can be used to judge the location of corrosion or sunder. At the end of the paper,a practical example was given to show that the method is feasible.
出处
《计算机仿真》
CSCD
北大核心
2010年第7期239-243,308,共6页
Computer Simulation
关键词
故障诊断
接地网
可及节点
网络重构
Corrosion diagnosis
Grounding grid
Touchable nodes
Network reconstruction
