| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 90 === This thesis presents a single-phase three-wire grid-connection photovoltaic (PV) power inverter with a feature of partial active power filter (PAPF), which can not only deal with PV power but filter current harmonics and improve power factor. Once the processed power exceeds the switch ratings, the inverter can reduce its output reactive power and distraction power, while still can supply the maximum real power generated by the PV arrays. In derivation of control strategies, a three-dimension coordinate limit sphere is defined to con-fine the output power of the inverter. To determine the power that the inverter can process, a criterion is proposed to find reactive power, which can avoid complex detections of phase angle and magnitude of the fundamental compo-nent of a nonlinear load current. Simulation results and experimental measure-ments have verified the proposed algorithm and the feasibility of the inverter.
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