Optimization Design Of Grounding Grid For Qiangen Zanhuang

With the high speed of the development of the power industry,the capacity of power system is increasing and threats the safety of the people and the equipment.Transformer substation grounding grid is to guarantee the safe and reliable operation of the power system.The grounding grid can make the fault current inflow to the ground and limit it.Grounding resistance is the most important parameter of the grounding grid.However,there are so many factors can influence the measurement result just like liquid,the soil and so on.How to get an exact measurement result is our central of attention.In this paper we pay attention to the grounding resistance and make contribution as follows:Firstly,we make a contrastive analysis of some measurements method which are used widely and talk about their characteristics.Secondly,we measure and calculate the grounding resistance by using four-electrode method according to the Zanhuang Qiangen transformer substation in Shijiazhuang.We selecte four points to get measuring data,then we use the CDEGS to analyse the data and make comparisons between it and the qualification.Thirdly,we analyse the factors that affects the accuracy of the measurement result,then talk about the method diminishing error according to the situation of Shijiazhuang.Finally,we talk about some method of optimization measures aimed at reducing the grounding resistance and analyse their effectiveness and characteristics.Then we propose an optimization strategy of Qiangen transformer substation,and get an result that can meet our expection.