The photovoltaic (PV) industry is developing rapidly, and electricity from decentralized or grid-connected systems is becoming increasingly important. Grid-connected PV systems with active and reactive power compensation can compensate for voltage fluctuation and enhance power system stability. The paper proposes a two-stage, three-phase PV system with reactive power compensation based on the structural properties of conventional PV grid-connected systems. The system achieves maximum power point tracking through real-time detection of PV current and voltage output, load current, and grid voltage and provides active electricity to the grid. It can provide reactive energy required by the grid to compensate for local load reactive current, effectively suppress dynamic voltage fluctuations, improve the electric power quality, and reduce investment outlay. Simulation results are carried out to validate the rationality of the design.
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Wei Xie (2024) studied this question.
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