摘要
针对车载充电机前级AC-DC变换器工作时,网侧电流存在严重畸变以及系统的动态响应性能不足的问题,提出了一种模糊控制和无差拍控制相结合的功率因数校正控制策略。在小信号建模的基础上,对传统PI平均电流控制进行分析,将其电压环改用模糊PI控制,以增强直流侧电压的动态响应性能;将电流环改用无差拍控制,以提高交流侧电流质量、减小谐波损耗。同时对无差拍控制进行了改进,通过预测第k+2时刻采样电流和第k+1时刻参考电流,改善了实际系统的时间延时和相位滞后问题。采用MATLAB/Simulink进行仿真,结果表明该控制策略有效地减小了网侧电流的总谐波失真,并提升了输出侧的动态响应指标。
Aiming at the problems of serious distortion of grid-side current and insufficient dynamic response performance of the system when the front stage AC-DC converter of vehicle charger is working,a power factor correction control strategy combining fuzzy control and deadbeat control is proposed.On the basis of small signal modeling,the traditional PI average current control is analyzed briefly.The voltage loop is changed to fuzzy PI control to enhance the dynamic performance of DC side voltage,and the current loop is changed to deadbeat control to improve the quality of AC side current and reduce harmonic loss.At the same time,deadbeat control is improved,and the time delay and phase lag of the actual system are improved through prediction of the sampling current at the k+2 moment and the reference current at the k+1 moment.By MATLAB/Simulink simulation,the results show that the control strategy can reduce the total harmonic distortion of the grid side current effectively,and improve the dynamic response index of the output side.
作者
马驰
曾国辉
黄勃
刘瑾
韦钰
MA Chi;ZENG Guo-hui;HUANG Bo;LIU Jin;WEI Yu(School of Electronic and Electrical Engineering,Shanghai University of Engineering Science,Shanghai 201600,China)
出处
《控制工程》
CSCD
北大核心
2023年第1期70-77,共8页
Control Engineering of China
基金
国家自然科学基金资助项目(61603242,61701296)。
