3×4矩阵变换器的双电压控制策略  

Strategy of double line-to-line voltages control for 3×4 matrix converter

作　　者：王汝田[1] 崔永恒[1] 陈酋峰 伏祥运 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]国网连云港供电公司,江苏连云港222004

出　　处：《电力自动化设备》2014年第12期95-99,共5页Electric Power Automation Equipment

摘　　要：针对3×3矩阵变换器(MC)不能带不平衡负载问题,应用3×4 MC拓扑结构,其增加的中线桥臂连接到负载中性点。继承3×3 MC的双电压控制方法,并根据其调制过程的分析、推导,得出在不平衡负载情况下,三相桥臂的输出电压中含有零序分量。对中线桥臂单独采用脉宽调制方法,控制负载中性点的电压为相应的零序电压,从而使输出负载电压为三相对称电压。最后应用MATLAB/Simulink进行了仿真,仿真结果表明,应用所提出的控制策略,3×4 MC可以为不平衡负载提供三相对称的电压,验证了所提控制策略的正确性和有效性。As the 3×3 MC（Matrix Converter） can＇t carry unbalance load,the topological structure of 3×4 MC is applied,which connects the neutral point of load to the added midline bridge. The strategy of double line- to-line voltages control for 3×3 MC is inherited and the analysis and deduction of its modulation process show that,the output voltages of three-phase bridges with unbalance load have the zero-sequence components. The pulse width modulation is applied to the midline bridge alone to control the neutral point voltage of load as the corresponding zero-sequence voltage,which makes the outputs of three-phase load voltage symmetric. Simulation model is built with MATLAB/Simulink and the simulative results show that,the 3×4 MC with the proposed control strategy provides symmetric three-phase voltage for the unbalance load,verifying its correctness and effectiveness.

关 键 词：3×3矩阵变换器 3×4矩阵变换器 不平衡负载 双电压控制策略 脉宽调制 变换器 电压控制 

分 类 号：TM46[电气工程—电器]