| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系 === 100 === Based on a single-phase Z-source inverter, a grid-connected PV system has been built in this thesis. Besides, a Digital Signal Processor (DSP) is used to implement the power control of Z-source inverter. We employ an LC network to couple the power stages by operating them in shoot-through and non-shoot-through modes, and the DC bus voltage and the output voltage can be simultaneously controlled. And the zero-point detector circuit with PLL control is used to facilitate the parallel connection of the inverter to grid. In addition, the control angle between output current and grid voltage is used to regulate active and reactive power feeding to the utility. To verify the feasibility of the system MATLAB is used to built system model, and the operation of the system is simulated. Finally, a prototype was built, and the tests in the laboratory were staged, and the results illustrate the parallel connection of the inverter to grid and the power control of the system can be satisfied.
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