A Hybrid Multilevel Inverter Topology with Third Harmonic Injection for Grid Connected Photovoltaic
2014-10-30
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A three phase hybrid multilevel inverter topology is proposed for grid integrated photovoltaic central inverter systems. This topology is a hybrid of cascaded H bridge topology (CHB) and neutral point clamped (NPC) topology. The inverter uses asymmetric structure of dc bus voltage to increase the number of levels of the inverter. Third harmonic injection is
proposed in order to have better utilization of the dc bus and to obtain higher number of levels. Nearest voltage level control is
adapted as modulation technique to have good dynamic performance with less computational burden. A 29-level
MATLAB/Simulink model of the inverter is developed to verify the performance of the proposed topology. The simulation uses
only two H-bridges per phase and one three phase NPC (threelevel) inverter to obtain 29 levels in line-to-line voltage. The
objective of the work is: Reduction of number of switching devices, system (con
proposed in order to have better utilization of the dc bus and to obtain higher number of levels. Nearest voltage level control is
adapted as modulation technique to have good dynamic performance with less computational burden. A 29-level
MATLAB/Simulink model of the inverter is developed to verify the performance of the proposed topology. The simulation uses
only two H-bridges per phase and one three phase NPC (threelevel) inverter to obtain 29 levels in line-to-line voltage. The
objective of the work is: Reduction of number of switching devices, system (con
matlab
逆变器
注入
混合
光伏
三次
谐波
拓扑
逆变
电平
并网
中央
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