车载充电机单相PWM整流器自抗扰预测电流控制

Single-phase PWM Rectifier Active Disturbance Rejection Prediction Current Control for Vehicle Charger

单相脉宽调制(PWM)整流器作为车载充电机交直流变换的重要模块,在传统无差拍预测电流控制(DPCC)时存在的参数不匹配、控制时延等诸多问题。此处提出一种自抗扰控制器预测电流控制(ADRC-PCC)方法。在电压回路中,设计ADRC降低二倍频功率波动及电网谐波影响,提高系统动态响应能力。在电流回路中,通过二阶广义积分锁相环(SOGI-PLL)预测k+1时刻电网电压,进而构建逐步逼近调节电网电压补偿系数,减少参数失配和控制延迟影响,提高系统稳定性。最后,依托2 kW单相PWM整流器测试平台对所提ADRC-PCC方法进行测试,实验结果表明,该方法可在负载突变、容性补偿等多模式下实现单相PWM整流器高性能调节,与传统DPCC方法相比动稳态特征和鲁棒性更优。

Single-phase pulse-width modulation(PWM)rectifier is an important module for AC/DC conversion of vehicle charger,which has many problems such as parameter mismatch and control delay in traditional deadbeat predictive cu-rrent control(DPCC).Aiming at the above problem,an active disturbance rejection controller predictive current control(ADRC-PCC)method is proposed.In voltage loop,ADRC is designed to reduce power fluctuation and harmonic distu-rbance of the power network,and improve the dynamic response ability of the system.In the current loop,the second-order generalized integral phase-locked loop(SOGI-PLL)is used to predict the grid voltage at the time k+1,and then the grid voltage compensation coefficient is gradually approximate and adjusted to reduce the influence of parameter mi-smatch and control delay,and improve system stability.Finally,proposed ADRC-PCC method is tested on a 2 kW single-phase PWM rectifier test platform,the experimental results show that the proposed method can achieve high perfor-mance regulation of single-phase PWM rectifier under multiple modes such as load mutation and capacitive compen-sation,and has better dynamic and steady state characteristics and robustness than the traditional DPCC method.