基于DMC-PID的Buck型DC／DC变换器的输出特性控制.pdfVIP

学兔兔 第52卷 第2O期 电测与仪表 Vo1．52 No．20 2015年 10月25日 Electrical Measurement Instrumentation oct．25．2015 基于DMC—PID的Buck型DC／DC变换器的输出特性控制术 吕学勤，刘文明 (上海电力学院 自动4L-Y-程学院，上海200090) 摘要：基于Buck型DC．DC变换器动态响应速度较慢、抗扰动能力差的现状，提出了基于输出电压微分一单周 控制Buck型DC．DC变换器数学模型的DMC．PID控制方法。该算法将DMC算法与PID算法相结合，充分发 挥PID抗干扰性和DMC对惯性、延迟适应能力强的优点。为验证在PID与DMC结合时所采用的串联与并联 两种不同的控制方法的控制效果，针对不同工作状态对系统进行了仿真。结果表明：DMC—PID并联控制系统 总体性能优于DMC．PID串级控制系统，但两种控制方案都具有较强的鲁棒性及良好的抗扰动性能，能够提高 系统的动、静态性能指标。 关键词：动态矩阵控制；Buck变换器；燃料电池；抗干扰性 中图分类号：TM46 文献标识码：B 文章编号：1001—1390(2015)20—0071—05’ Output characteristic control of Buck DC／DC converter based on DMC-PID Lv Xueqin，Liu Wenming (School of Automation Engineering，Shanghai University of Electric Power，Shanghai 200090，China) Abstract：In view of the poor ability to resist disturbance and dynamic response lag of Buck converter，the DMC—PID algorithm which is based on output voltage differential coefficient and one cycle control(OVDC—OCC)method for DC／ DC converter is brought forward．It combines DMC algorithm with PID algorithm to takes advantage of PID’S anti—in— terference ability and DMC’S adaptability to inertia and delay．In order to verify the control effect of the system which combines DMC algorithm with PID control in the series and parallel way，according to different working conditions on the system are simulated．The results are presented，which show the effectiveness of the control strategy，with better robustness and anti—disturbance performance，for it improves the dynamic and static system performance．The DMC— PID parallel control system is superior to DMC-PID cascade control system． Keywords：dynamic matrix control，buck converter，fuel cell，anti—inte