Suwon Lee, Jae-Hyung Kim, S. Lee, Byoung-Kuk Lee, C. Won
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A tranformerless grid-connected photovoltaic system with active and reactive power control
This paper presents a transformerless grid-connected photovoltaic (PV) system with active and reactive power control. The proposed system operations can be categorized into sunny mode and night mode. In night mode, it compensates for the reactive power demanded by nonlinear loads. In sunny mode, it not only supplies active power from the PV array to the grid or loads, but also performs power quality control (PQC), to improve the power factor and reduce the harmonic current. Simulation results are provided to demonstrate the effectiveness of the proposed system.
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