发电厂、变电站接地网故障诊断研究  

Research of fault diagnosis of grounding grid of electric power plants and substations

作　　者：许慧中[1] 马宏忠[2] 张志新[2] 濮岚[2] 李广河[3] 赵峰[3] 

机构地区：[1]南京工业职业技术学院电气工程系,江苏南京210046 [2]河海大学电气工程学院,江苏南京210098 [3]河南省济源供电公司,河南济源454650

出　　处：《电力系统保护与控制》2009年第24期51-54,共4页Power System Protection and Control

基　　金：国家自然科学基金资助(50477010);南京市2008年科技发展计划项目资助(200801018)~~

摘　　要：应用电网络理论和矩阵理论,以灵敏度矩阵的形式建立了故障诊断方程。然后采用多激励法显著增加了独立方程的个数,有效解决了故障诊断方程的欠定问题。通过微量处理法和采用迭代的方法,可用线性方程来逐步逼近非线性方程,从而应用最小二乘法求解。经仿真计算和模拟实验表明,该方法简单、可行,可用于接地网的故障诊断。Making use of the electric network theory and the matrix theory, the fault diagnosis equations are set up in the form of sensitivity matrix. Then the method of multiple-excitation is applied to increase the number of independent equations and resolve the problem of morbid equations effectively. By introducing the micro-disposal method and the iterative algorithm, we can use the least squares approach to solve the nonlinear equations progressively by a series of linear equations. The results of the emulation calculation and simulation experiment show that the proposed method is simple and feasible, so the method can be applied to fault diagnosis of grounding grid.

关 键 词：接地网 故障诊断 非线性方程: 微量处理法 最小二乘法 

分 类 号：TM862[电气工程—高电压与绝缘技术]