引用本文: | 王汝田,崔永恒,陈酋峰,伏祥运.3×4矩阵变换器的双电压控制策略[J].电力自动化设备,2014,34(12): |
| WANG Rutian,CUI Yongheng,CHEN Qiufeng,FU Xiangyun.Strategy of double line-to-line voltages control for 3 × 4 matrix converter[J].Electric Power Automation Equipment,2014,34(12): |
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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。 |
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 |
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Strategy of double line-to-line voltages control for 3 × 4 matrix converter |
WANG Rutian1, CUI Yongheng1, CHEN Qiufeng1, FU Xiangyun2
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1.Electrical Engineering College,Northeast Dianli University,Jilin 132012,China;2.State Grid Lianyungang Power Supply Company,Lianyungang 222004,China
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Abstract: |
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. |
Key words: 3×3 matrix converter 3×4 matrix converter unbalance load double line-to-line voltages control strategy pulse width modulation electric converters voltage control |