牵引变电所地网腐蚀与改造研究

Study on Reconstruction of Eroded Grounding Grid of Traction Substation

牵引变电所地网是安全供电的重要设施。牵引变电所地网改造受场地限制,必须仔细设计才能够使接地电阻达到要求。本文根据实际情况,提出了以多根垂直接地极并联为主,采用等效扩大接地导体尺寸,延伸辅助地网的办法进行改造。经工程实践表明,该方法实用可行。

Grounding grid, a very important facility for safer power supply, will be eroded in different degree after running more than ten years. The grounding resistance will increase and endanger personnel＇s safety. Since its reconstruction will be constrained by the site space, so the prudential design is needed so as to reach the required grounding resistance. In connection with actual requirements, the paper puts forward the reconstruction of grounding grid by erection of upright grounding poles, most of which are set in parallel, enlarging the dimensions of equivalent conductors and expanding the auxiliary grounding grid. Its applications in the projects show that it is practical and feasible.