基于电网络理论的接地网故障诊断方法  

Optimizing Diagnosis of Grounding Grids Based on Electric Network Theory

作　　者：许磊[1] 李琳[1] 邹园[1] 

机构地区：[1]华北电力大学电气工程学院,河北保定071003

出　　处：《陕西电力》2011年第4期60-64,共5页Shanxi Electric Power

摘　　要：变电站接地网是维护电力系统安全可靠运行、保障运行人员和电气设备安全的重要设施。将接地网近似成纯电阻网络,利用实际接地网的拓扑结构和接地引线间电压的测量数据,根据电网络理论和故障诊断原理建立接地网的故障诊断方程,利用功率损耗最低定理建立优化目标函数,通过求解诊断方程得到接地网各支路电阻的变化值,进而判断接地网的腐蚀程度。通过仿真模拟计算并结合地网模型试验,验证了该诊断理论和方法的实用性。Grounding grid in substation is vital for preserving the safety and reliability of power system,protecting the operator and electrical equipments.The grounding grid is treated as a pure resistance network.The corrosion diagnosis equations are built by application of electric network theory and then solved by using the topology of real grounding grid and measured data of the voltage between down-leads.Using the lowest power loss theory,mathematic function is established as well as being solved by optimal method.We can obtain the change of grounding grid branch resistance which determines the level of the diagnosis.The practicability of primary simulation calculations and experiments is proved.

关 键 词：电网络 接地网 腐蚀 故障诊断 

分 类 号：TM862[电气工程—高电压与绝缘技术]