To Eliminate Common Mode Leakage Current in Photovoltaic Grid Connected Power System

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Provided by: Creative Commons
Topic: Hardware
Format: PDF
To eliminate the common-mode leakage current in the transformer less photovoltaic grid connected system, an improved single-phase inverter topology is presented. The improved transformer less inverter can sustain the same low input voltage as the full-bridge inverter and guarantee to completely meet the condition of eliminating common-mode leakage current. Both the unipolar Sinusoidal Pulse Width Modulation (SPWM) as well as the double frequency SPWM control strategy can be applied to implement the three-level output in the presented inverter.
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