WPT系统双边协同抗饱和控制策略研究  

Dual-side Cooperative Control Strategy with Anti-windup Design for WPT Systems

作　　者：蔡韶波 张新燕[1] 李弘昌 杨涵棣 支前进 CAI Shaobo;ZHANG Xinyan;LI Hongchang;YANG Handi;ZHI Qianjin(School of Electrical Engineering,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学电气工程学院,乌鲁木齐830017

出　　处：《电源学报》2024年第S01期236-245,共10页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51667018);新疆维吾尔自治区自然科学基金资助项目(2021D01C044)。

摘　　要：基于脉冲密度调制PDM(pulse density modulation)的双边协同控制使得无线电能传输WPT(wireless power transfer)系统在耦合系数和负载阻抗变化的情况下能够保持最大效率传输,但是在系统启动及电池恒流恒压充电切换时会产生远高于额定值的电流/电压超调。为了解决超调问题,保证电池充电稳定性,提出了一种抗饱和控制策略。首先,基于WPT系统的等效电路模型分析最大效率点跟踪的工作原理;然后,结合WPT系统两侧控制量的协同工作过程,解析系统启动及电池恒流恒压充电切换时的超调现象,给出恒流恒压控制器设计方法,将反计算抗饱和算法与控制器设计相结合,提出抗饱和控制策略;最后,搭建了仿真模型,验证所提出的抗饱和策略能够有效抑制控制器饱和导致的超调,减少系统到达稳态的时间,降低电流/电压的超调带来的元器件应力。Under the dual-side cooperative control based on pulse density modulation,a wireless power transfer(WPT)system can maintain the power transmission at its maximum efficiency under changes in the coupling coefficient and load impedance.However,a current/voltage overshoot which far exceeds the rated value will occur during the system startup and battery constant-current and constant-voltage charging switching.To solve the problem of overshoot and ensure the battery charging stability,an anti-windup control strategy is proposed.First,the working principle of maximum efficiency point tracking is analyzed based on the equivalent circuit model of WPT system.Then,combined with the cooperative working process of control quantities on both sides of the WPT system,the overshoot phenomenon during the system startup and battery constant-current and constant-voltage charging switching is analyzed,and a design method for the constant-current and constant-voltage controller is given.The anti-windup control strategy is proposed by combining the anti-windup algorithm based on inverse calculation with the controller design.Finally,simulation results show that under the proposed anti-windup strategy,the overshoot caused by controller saturation can be effectively suppressed,the time for the system to reach its steady state decreases,and the component stress caused by current/voltage overshoot is also reduced.

关 键 词：无线电能传输 抗饱和 双边协同控制 最大效率点跟踪 恒流恒压充电 

分 类 号：TM724[电气工程—电力系统及自动化]