A dynamic performance enhancement and efficiency optimization method for LCC-LCC compensated wireless power transfer systems

During the operation of wireless power transfer (WPT) systems, abrupt changes in load and input voltage can impact system stability and operating conditions. This paper addresses a dual-side coordinated control strategy that combines an advanced finite control set model predictive control (FCS-MPC) with impedance matching for LCC-LCC compensated WPT systems, aiming to enhance dynamic performance and optimize efficiency. Firstly, the secondary-side rectifier employs FCS-MPC combined with phase shift modulation (PSM) to achieve rapid voltage tracking. An improved FCS-MPC method is proposed featuring a novel iterative approach, adaptive compensation, and a multi-objective optimization cost function to simultaneously improve system stability, responsiveness, and computational efficiency. Secondly, the primary-side inverter combines impedance matching with PSM to track the point of maximum system efficiency. Finally, model verification results substantiate the viability of the developed strategy. Under sudden load and input voltage changes, improved MPC reduces overshoot and settling time by nearly 60% and 70%, respectively, compared to PI control. Additionally, system efficiency optimizes by approximately 1.3% through impedance matching.