双电压合成矩阵变换器换流策略的改进  

Improvement of Commutation Strategy for Matrix Converter Based on Two-line Voltage Synthesis

作　　者：何凤有[1,2] 曹言敬[1,2] 方永丽[1,2] 张旭隆[1,2] 

机构地区：[1]中国矿业大学信息与电气工程学院,徐州221008 [2]江苏省电力传动与自动化工程技术研究中心,徐州221008

出　　处：《电力系统及其自动化学报》2009年第2期67-72,共6页Proceedings of the CSU-EPSA

摘　　要：换流问题是矩阵变换器工业应用的主要障碍之一。基于双电压合成策略,分析了传统的四步换流策略由于换流时刻存在延迟,降低了换流可靠性,并且会导致输入和输出波形发生畸变。根据四步换流策略的原理,将四步换流缩短为两步换流,大大减少了换流时间。利用Matlab/Simulink软件建立了相应的仿真模型,并利用dSPACE硬件实时仿真平台进行了实验。仿真和实验结果表明,两步换流策略提高了换流可靠性,改善了输入输出波形质量,其输出电流THD值(总谐波畸变率)由4.68%降为2.67%。The commutation problem of matrix converter is one of the major reasons that there are few practical applications. The process of traditional four-step commutation strategy is analyzed based on two-line voltage synthesis, which reduce the reliability of commutation and induce the distortion of input and output waveforms because of the delay of commutation moment. Then two-step commutation strategy is presented 4, by reducing the commutation time of four-step commutation strategy. The simulation model of matrix converter is built with Matlab/Simulink software, and the experiments are held on by the platform of dSPACE hardware real-time simulation. The simulation and experiment results have verified that the commutation reliability and the quality of input and output waveforms are both improved by two-step commutation strategy. Compared with traditional four-step commutation strategy, the output current THD of two-step commutation strategy is reduced to 2.67% from 4.68%.

关 键 词：矩阵变换器 两步换流策略 四步换流策略 双电压合成 仿真 改进研究 

分 类 号：TM46[电气工程—电器]