| Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系 === 107 === This paper proposed a new single-phase three-wire single-stage inverter for the residential low-voltage power distribution. The proposed system structure integrates with an energy storage device, the active electronic switches, and a multi-port high-frequency transformer, for single-phase three-wire output loads. With the newly topology characteristic, the proposed inverter has the better system reliability, capability of single-stage power conversion for high-efficiency conversion, wide input voltage operation and the electrical isolation with safety satisfied. The content of the thesis includes the circuit operation principle, the small-signal model and the control loop analyzes, and pulse-width modulation techniques. Finally, a 1000W prototype has been built to verify the simulation and theoretical analysis results, for proving the system feasibility. The highest efficiency of 84% of the proposed inverter under 500W is achieved, compared with the buck/boost and boost/buck hybrid inverter types, the increased conversion efficiency is about 5%. The voltage gain is higher than semi-two-stage, boost, boost/buck hybrid, and boost/half-bridge hybrid inverter types are 3.2 times, 4 times, 1.9 times and 1.3 times.
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