矩阵变换器双电压合成策略的非线性补偿法  

Nonlinearity compensation method based on two-line voltage synthesis for matrix converter

作　　者：吴小兰[1] 谭国俊[1] 方永丽[1] 马星河[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电机与控制学报》2008年第2期164-168,共5页Electric Machines and Control

基　　金：中国矿业大学科技基金资助(E200427)

摘　　要：为减少矩阵变换器因换流的延时、开关管的导通压降对输入、输出性能的影响,基于双电压合成调制策略,对四步换流的死区效应、管压降形成的机理进行了定量分析,得出了一种非线性补偿方法。该方法根据双电压合成策略由输入电压瞬时值合成输出电压的特点,将管压降产生的电压误差考虑到理想参考输出电压中得到新的参考输出电压,补偿因换流的延时引起输出电压误差所需的调制时间,并在dSPACE硬件实时仿真平台进行了实验验证。结果表明,该非线性补偿方法不仅不需增加硬件及复杂的软件,简单易行,且减少了输出电流的谐波,改善了矩阵变换器的输出性能。To lessen the influence on the matrix converter performance caused by actual commutation delay and on-state switching device voltage drop, based on the two-line voltage synthesis, the dead area effect of four-step commutation and the mechanism of on-state switching device voltage drop are analyzed quantitatively and a new nonlinear compensation method is proposed. The two-line voltage synthesis strategy had the characteristic that the output voltage was synthesized by the instantaneous value of input voltage. Accordingly, the voltage error brought by voltage drop was considered into the ideal reference output voltage and the new reference voltage was deserved. Afterwards, the goal of nonlinear compensation was achieved by compensating the required modulation time of output voltage error resulting from the commu- tation delay. The experiment was taken with the dSPACE hardware real time simulation platform and the result of experiment shows that the compensation method does not need any additional hardware or complicated software, the harmonic of output current is lessened and output performance is improved.

关 键 词：矩阵变换器 非线性补偿 双电压合成 

分 类 号：TM464[电气工程—电器] TM624