Analysis and Design of ADRC for the LCC-LCC WPT System

This paper presents the dynamic characteristics of a Wireless Power Transfer (WPT) system based on the LCC-LCC compensation topology. To enhance the voltage regulation performance, an Active Disturbance Rejection Control (ADRC) algorithm is implemented to indirectly control the secondary-side voltage by regulating the input current of the primary compensation network. This approach significantly improves the dynamic response of the load voltage and enhances the system's anti-interference capability. Initially, the small-signal model of the system is derived using the Generalized State-Space Average (GSSA) method. Based on this model, the transient behavior of the WPT system is analysed, and the correlation between the primary-side current and secondary-side voltage during transients is demonstrated. Subsequently, an ADRC-based control strategy is proposed, where the control is applied on the primary-side current, simulations were carried out using MATLAB Simulink 2024a. The results confirm that the proposed ADRC strategy achieves a stable and fast voltage response, with improved disturbance rejection and a response time suitable for simulation applications.

Keywords: High-Frequency, LCC-LCC Compensation Network, Rectifier Circuit, Dc-Dc Buck Converter