Application of Grounding System Resistance Reduction and Intelligent Management Technology in Pumped Storage Power Stations

The grounding resistance exceeds the standard under complex geological conditions in pumped storage power stations, causing equipment safety hazards. This paper optimizes the horizontal grounding grid spacing based on three-dimensional geological modeling, combines the composite arrangement of deep well grounding electrodes and ion grounding electrodes, and applies high-filling-rate carbon-based resistance reduction agents to significantly reduce soil resistance. At the same time, a monitoring network integrating optical fiber and wireless is constructed, and the LSTM model is used to predict the grounding status in real time. Based on the prediction, the deep well grounding electrode switching and the penetration rate of the resistance reducing agent are intelligently regulated to achieve dynamic resistance stability. The proposed method reduces the soil resistivity from the average value of 1524 Ω·m to 320Ω·m (a decrease of 79.0%), reduces the lightning failure rate, and reduces the maintenance cost, providing a new paradigm for the construction of power stations under complex geological conditions.