Abstract: The construction of large-scale charging facilities not only brings convenience and energy conservation, but also has a huge impact on the power grid, increasing the maintenance and construction cost of the power grid. The emergence of energy storage system has greatly alleviated the power consumption pressure, cut peak and fill valley, optimized the power consumption structure, and played a positive role in alleviating the pressure of power distribution network and improving the utilization rate of equipment. This paper studies the safety of Beijing public transport energy storage system and puts forward reasonable operation measures.