“New energy is integrated into the power system, electric vehicles participate in grid regulation, tap into the potential of charging load to fill the valley, and enhance the space for new energy consumption. Experts construct an evaluation framework, conduct Monte Carlo simulations, propose typical load characteristic indicators, and evaluate the valley filling potential of urban public charging stations. The results show that the simulated charging load is consistent with the actual load trend. After the service fee discount exceeds 30%, for every 10% decrease, the average valley filling response increases by 23600 kW.”