变电站门型构架对地网腐蚀诊断的影响  

The Influences of the Gate-type Architecture on Grounding Grid Corrosion Diagnosis in the Substation

作　　者：史宏伟[1] 刘守明[1] 

机构地区：[1]国网河南省电力公司周口供电公司,河南周口466000

出　　处：《山西电力》2014年第2期31-36,共6页Shanxi Electric Power

摘　　要：指出完整健康的接地网对电力系统的安全稳定运行至关重要。基于特勒根定理和电网络理论,提出了接地网导体腐蚀诊断的计算模型,研究了站内构架对诊断结果准确性的影响。以河南省周口市某110 kV变电站为例进行现场测试,结果表明,考虑钢型构架影响时,不论构架位置如何布置、数目多少,进行腐蚀诊断测试时其附近支路的腐蚀倍数要比不考虑构架影响时低,且腐蚀支路距离构架越近,腐蚀倍数降低越明显;当构架接于腐蚀支路两端时误差最大,而对距离构架较远的腐蚀支路的诊断结果基本上没有影响。The integrity and soundness of grounding grid is crucial to the safe and stable operation of power system. Based on Tellegen＇s theorem and electrical network theory, grounding conductor corrosion diagnosis model is proposed, which is used to study the impacts of gate-type architecture on the accuracy of the diagnosis results. A 110 kV substation at Zhoukou city in Henan province is taken for an example to test this model. The results show that when the impacts of the gate-type architecture are taken into account, the increasing multiples of branches resistance are smaller than that without the consider of the station architecture, regardless of the position of station architecture. When corrosion branches are nearer to the station architecture, th~ measurement ~rrnr is hi^or nnrl ,~irp ~,~r~

关 键 词：接地网 门型构架 腐蚀诊断 

分 类 号：TG174[金属学及工艺—金属表面处理]