非正常工况下矩阵整流器的前馈模糊补偿控制

Feedforward fuzzy compensation control of matrix rectifier in abnormal conditions

在分析了三相输入电压正常工况下矩阵整流器的输入电流空间矢量调制算法后,针对输入电压在非正常工况下将会对输出直流电压波形产生影响的问题,提出一种带前馈模糊补偿控制策略的输入电流空间矢量调制算法,通过检测和实时计算电压矢量的模并与正常值进行比较,采用模糊控制动态调整当前控制周期的调制系数,保证输出电压的稳定。详细介绍了该补偿策略的工作原理,建立仿真模型和研制试验样机,仿真和实验结果验证了补偿控制策略的可行性和有效性。

The input current SVM（Space Vector Modulation） algorithm of matrix rectifier in normal conditions is analyzed and its affect on the output DC voltage waveform in abnormal conditions is studied,aiming at which,an input current SVM algorithm with feedforward fuzzy compensation control is proposed. The modulus of voltage vector is measured,calculated and compared with the normal value in real time, according to which ,the modulation coefficient of present control cycle is dynamically adjusted by the fuzzy control to keep the output voltage stable. The operating principle of the proposed compensation strategy is analyzed in detail,and the simulation model and experimental prototype of matrix rectifier are established. Simulative and experimental results verify the feasibility and effectiveness of the proposed compensation control strategy.