Abstract
Based on the mathematical model of the three-phase two-stage PV grid inverter, the fuzzy-PID control strategy is applied in the grid connected control of PV system in this paper. The purpose of the intelligent control of photovoltaic grid connected inverter has been achieved. The digital simulation and physical simulation show that the fuzzy-PID control strategy can improve the PV system grid control dynamic process and get the smooth connection of the PV system with the power grid. At the same time, the harmonic pollution on the grid has been significantly reduced.
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