Harmonic Reduction of Enhanced Single Phase Step-Up Five-Level Inverter Using Lcl Filter
Abstract
One of the important criteria is the quality and harmonic contents of the current being injected to the grid. High-order harmonics of the grid current should be very limited (lower than 0.3% of the fundamental current). Beside the topology of the power electronic interface, the output filter also affects the quality of the load voltage .proposed a 5-level inverter is presented for grid integration systems along with its output LCL filter design. Analytical calculation of losses for the 5-level inverter and the output LCL filter is presented. It is also compared to the H-bridge inverter in terms of output voltage and current harmonics, and the overall losses.
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