变电站接地网降阻措施研究

摘要

变电站接地网在电力系统发生故障时，将故障电流迅速排泄入地，控制接地网的最大电位升高，保证人身和设备安全，故合格的接地网在电力系统安全运行中具有十分重要的作用。从变电站的设计、建造施工以及日常运行维护等方面，综合分析了接地网接地电阻值偏高的主要原因；结合当前应用的各种降阻措施的优缺点，指出了接地网的降阻措施从设计到施工及运行维护方面的种种问题，并提出了合理的降阻方法。%When a fault of grounding network of a substation in power system occurs, the electric current at fault is rapidly connected with the earth to control the rise of maximum potential of the grounding network and to ensure the safety of the people and the equipment, as important role in safely-running of power system. This a result, qualified substation grounding network plays an paper comprehensively analyzes the main reasons for high grounding resistance value of the grounding network from the aspect of design, construction and daily operation of a substation,points out many problems in design, construction and maintaining for resistance reduction of grounding network based on the advantages and disadvantages of currently-used all kinds of resistance reduction measures and proposes some reasonable methods for resistance reduction