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一种多电平逆变器及其并网策略

Electrical Measurement & Instrumentation(2014)

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Abstract
近来单相多电平逆变器由于自身的优点得到了广泛的关注。本文介绍一种新型采用二极管的2N-1级联叠加式多电平逆变器,以采用二极管2 N-1级联叠加式15电平逆变器为例,提出用单相空间矢量调制( SVPWM)技术实现逆变并网。并网参考电流的相位和频率由电网电压的相位和频率得到,幅值由参考功率决定,系统加入电流瞬时反馈和PI控制器来实现单位功率因数并网,在MATLAB/SIMULINK环境下建立模型进行仿真,并计算不同参考功率时的并网电流谐波畸变率。结果表明并网功率因数高,电流谐波含量少,为实际应用提供了理论依据。
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Multilevel Converters,Voltage Source Inverters,Grid Integration,Smart Grid Applications,Grid Synchronization
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