A 1/spl phi/3W inverter with grid connection and active power filtering based on nonlinear programming and fast-zero-phase detection algorithm

This work presents design and implementation of a single-phase three-wire (1/spl phi/3W) inverter with grid connection and active power filtering which is based on nonlinear programming and fast-zero-phase detection (FZPD) algorithm. The proposed inverter system can transmit photovoltaic power, compensate harmonic currents, supply reactive power, and balance power at source side even when the line voltages are highly distorted. Simulated and experimental results have verified the FZPD algorithm and demonstrated that when the voltage sources are highly distorted, the proposed inverter system can yield better power quality over that with conventional zero-crossing-detection algorithm.

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