Research on the Construction of Integrated Grounding Grid of Substation and Energy Storage Station

Using substation site resources and allocating certain energy storage can effectively realize peak shaving and valley filling. In this paper, the integration construction scheme of new energy storage stations in a 35kV substation in Shanghai and the grounding grid model of substation and energy storage stations are proposed. The safety of integrated grounding grid is related to grounding resistance, contact voltage and step voltage. The safety parameters are calculated according to the original data and design specifications, and the safety limits are obtained. Based on CDEGS software, the model of integrated grounding network is constructed, and the safety evaluation of integrated grounding system is carried out. In order to meet the safety requirements, the integrated grounding network is optimized by adding conductors in the ring network and changing the compression ratio, which finally meets the requirements.