| Summary: | 碩士 === 國立成功大學 === 電機工程學系 === 102 === The purpose of this thesis is to implement a dual buck inverter for tide power transfer system. Because the change of front-end tide power transfer system output AC voltage could be varying and low. By realized the first stage of boost converter to rectify and boost the voltage, then convert power to the second stage of dual buck inverter. The thesis presents a new control strategy of constant frequency with variable hysteresis width. It can design the filter and choose power components easily when using the new type control. Compare to conventional hysteresis current control, by constant frequency variable hysteresis current control, it reduces the total harmonic distortion and the ripple of output voltage. Furthermore, it raises the system of power conversion efficiency. Finally, the thesis proposed a prototype 500 watt dual buck inverter system is implemented. The maximum efficiency of the system is 97% and THD is less than 2%.
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