V2G Control Strategy for Single-Phase Matrix Converter-Based WPT System to Suppress Grid Current Harmonics

The bidirectional power transfer capability of matrix converter-based wireless power transfer (WPT) systems renders them suitable for vehicle-to-grid (V2G) applications. However, grid voltage harmonics induce severe grid current distortion, which limits their practical applicability. In this article, a linearized model of the matrix converter-based WPT system under V2G operation is established. Based on this, the impact of grid voltage harmonics on grid current harmonics is analyzed. To address this issue, a composite control architecture integrating grid voltage feedforward compensation and grid current feedback regulation is proposed. Building upon this architecture, a proportional-resonant composite iterative learning controller is developed for closed-loop current control. The parameters of both the feedforward and closed-loop controllers are designed to ensure system stability and enhance harmonic suppression. Finally, the feasibility of the proposed method is verified through experimental verification.