电压瞬时跌落时矩阵变换器控制策略优化

摘要

为了解决矩阵变换器（ MC）输出电压波形受电网电压瞬时跌落影响的问题，提出了一种针对MC的新型前馈补偿控制。主要功能是根据电网电压变化实时改变调制系数m补偿输出电压波动、减少谐波含量。论文的创新点是在前馈补偿的基础上添加一种电流控制，提高控制精度。最后在输入电压瞬时跌落的情况下，应用Matlab／Simulink软件对MC优化策略进行仿真研究。结果表明该优化策略有效的抑制输出谐波、改善输出电压质量。%In order to solve the output waveform of matrix converter ( MC) under input voltage sag, this paper propo-ses a new feed-forward control strategy for MC.The main function is real-time to change the modulation factor m in re-al time, coefficient to compensation voltage fluctuations, and reduce the output harmonic according to the output volt-age change.Finally under the input voltage sag condition, the application of Matlab/Simulink simulation was studied for the MC optimization strategy.The results show that the optimization strategy is effectively to improve the quality of the output voltage and reduce the output harmonics.