Secondary Control of Parallel V2G Pharging Pile Based on Consistency Algorithm Strategy

Electric vehicles have the characteristics of mobile energy storage, and reasonable scheduling of their charging and discharging behaviours can play the role of peak shaving and valley filling for grid loads, realizing the two-way flow of energy, which is of great practical significance. To this end, this paper investigates the secondary control strategy of multiple charging piles in a microgrid system containing electric vehicle-to-grid interaction (vehicle-to-gridV2G), and this paper proposes a secondary FM control based on the consistency algorithm. This control strategy uses a sparse communication network for information exchange between neighbouring nodes, and is able to restore the steady-state frequency of the system to its rated value, achieve proportional distribution of active power between bidirectional charging piles, and avoid transient power oscillations while retaining the inertia characteristics provided by its VSG control. Through the MATLAB/Simulink simulation platform, a microgrid simulation platform with parallel V2G charging piles is built for algorithm simulation verification, which proves the effectiveness of the proposed control strategy.