Optimal Dispatching Strategy for Hybrid Microgrid with Small DC Charging Piles Based on V2G Technology

Large-scale integration of electric vehicles into the grid will have an impact on the grid and endanger the safe operation of the grid. This paper studies the optimal dispatching strategy for hybrid microgrid with small DC charging piles based on V2G technology. Firstly, establish an optimized dispatch model with the goal of minimizing user-side costs, network loss costs, wind and light abandonment costs, and load fluctuation costs. Consider the mobile energy storage characteristics of electric vehicles and determine the user’s charging method based on charging urgency. Secondly, based on the improved second-order cone relaxation algorithm, the established optimal scheduling model is solved using absolute value linearization and product variable linearization. Finally, the effectiveness of the proposed scheduling strategy is demonstrated through simulation in an improved IEEE 33-node AC and DC microgrid topology example.