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首页> 外文期刊>Electric Power Components and Systems >Selective Harmonic Elimination in Asymmetric Cascaded Multilevel Inverters Using a New Low-frequency Strategy for Photovoltaic Applications
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Selective Harmonic Elimination in Asymmetric Cascaded Multilevel Inverters Using a New Low-frequency Strategy for Photovoltaic Applications

机译：使用新型低频策略在光伏应用中的非对称级联多电平逆变器中的选择性谐波消除

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摘要

Asymmetric multilevel inverters with a main and auxiliary power circuit can yield maximum number of voltage levels against the number of semiconductor devices. Most of the output power will be produced by the main inverter, which works at low frequency and the auxiliary inverters only improve the voltage quality. Advantages of the asymmetric structure are reduced number of semiconductors and gate drive circuits and better voltage quality and efficiency, which make the asymmetric inverter to be a perfect candidate for photovoltaic applications. This article presents a new switching strategy in asymmetric multilevel inverters, which exploits extra degrees of freedom to eliminate more low-order harmonics. Simulation results show this method can introduce two new switching angles without affecting the power losses of the inverter.
机译：具有主电源电路和辅助电源电路的非对称多电平逆变器可以产生相对于半导体器件数量最大的电压电平数量。主逆变器将产生大部分输出功率，主逆变器在低频下工作，而辅助逆变器只会提高电压质量。不对称结构的优点是减少了半导体和栅极驱动电路的数量，并提高了电压质量和效率，这使不对称逆变器成为光伏应用的理想选择。本文提出了一种非对称多电平逆变器中的新开关策略，该策略利用额外的自由度来消除更多的低阶谐波。仿真结果表明，该方法可以引入两个新的开关角度，而不会影响逆变器的功率损耗。

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