模块化多电平逆变器的仿真分析
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河南理工大学电气学院焦作454000

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TM46

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The simulation analysis of modular multilevel inverter
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School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China

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    摘要:

    介绍模块化多电平逆变器的拓扑结构和工作原理,根据模块化多电平逆变器的特性及在高压大功率场合中的应用,采用基于排序法的电容均压控制算法与最近电平逼近调制策略相结合以实现电容电压的平衡和系统的稳定。采用上述的控制策略在MATLABSimulink仿真平台下搭建7电平的逆变器仿真模型,通过对子模块电容电压波动分析及逆变器输出电压电流谐波畸变率分析,结果表明最近电平逼近调制策略下换流器输出的波形质量高,谐波含量少,子模块电容电压波动小,验证了所采用的均压控制策略和最近电平逼近调制策略的合理性和有效性。

    Abstract:

    The paper introduces the structure and working principle of modular multilevel inverter, according to the characteristics of modular multilevel inverter and its application in the highvoltage and highpower, the capacitor voltagesharing control algorithm based on sorting method combined nearest level modulation are applied to achieve the capacitor voltage balance and the stability of the system. Then, a simulation inverter model of 7 level is built by MatlabSimulink using the above mentioned control strategy. The module capacitance voltage fluctuation and the harmonic distortion rate of f inverter output voltage and current have been analyzed to show that the inverter output waveform is of high quality, has less harmonic content, capacitor voltage fluctuation for SM is small and verify the rationality and validity of capacitor voltagesharing control strategy and nearest level modulation strategy.

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康润生,张锐.模块化多电平逆变器的仿真分析[J].电子测量技术,2016,39(3):23-28

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  • 在线发布日期: 2016-04-28
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