Research Progress on Grid Connection Control Technology of AC-DC Converter in Vehicle-to-Grid Interaction (V2G)

Abstract

In the process of easing energy supply shortages and promoting the implementation of the “dual carbon” goals, vehicle-to-grid interaction (V2G) has become a core technical path for the coordinated development of electric vehicles and power grids. The grid-connected control strategy of AC-DC converters is a core link supporting the safe and efficient operation of V2G systems. This study takes the grid-connected control technology of AC-DC converters in the V2G scenario as the core research object, uses the systematic literature review method to sort out the relevant research results at home and abroad in the past decade, and combines MATLAB/Simulink simulation tests and typical application case analysis to sort out the evolution context and technical characteristics of the converter topology and control strategy. It should be noted that the three types of topologies-single-stage isolation, two-stage isolation, and non-isolation-each have their own adapted scenarios, and the control strategies have gradually evolved from the traditional double closed-loop PI control to virtual synchronizer control and intelligent optimization control; The technical problems to be solved in the current field mainly focus on four dimensions: power quality regulation, smooth power switching, cluster collaborative scheduling, and low-voltage ride-through. Based on the existing test and analysis results, this study proposes four future research directions: multi-objective optimization, digital twin technology embedding, interface standardization, and low-cost mass production, which can provide theoretical references for the iteration and subsequent large-scale commercialization of V2G grid connection control technology. The universality verification of this technology direction still needs to cover more complex grid conditions, and subsequent studies can conduct supplementary tests for application requirements in special regions such as high cold and high altitude.