Type of Document	Thesis
Author	Wang, Lei
Author's Email Address	lw08e@fsu.edu
URN	etd-11032010-155103
Title	Study of the Cascaded Z-source inverter to solve the partial shading for the Grid-connected PV system
Degree	Master of Science
Department	Electrical and Computer Engineering, Department of
Advisory Committee	Advisor Name Title Hui Li Committee Chair Simon Y. Foo Committee Member Jim P. Zheng University Representative
Keywords	Partial shading Cascaded Z-source Grid-connected PV system
Date of Defense	2010-10-12
Availability	unrestricted
Abstract Recently there have been increasing interests in developing the renewable energy resources for the future energy need. Solar energy generation has shown its great potential to serve as a clean distributed energy source. While one drawback of the solar source is that when partial shading happens, which means the PV panels receive the non-uniform irradiation, the PV system output power would reduce depending on the partial shading scenario. Under this circumstance, the cascaded Z-source inverter for the grid-connected PV system is proposed to solve the partial shading problem. In order to demonstrate the proposed technology, the single stage Z-source inverter for the grid-connected PV system is introduced first. The designed control diagram could grantee the PV panel output its maximum power and the DC-link voltage could be stabilized. Then the cascaded Z-source inverter topology is proposed, this topology could enable each PV panel to output its maximum power even when partial shading problem happens to the PV system. And one 3 KW inverter simulation module is built in the Matlab/Simulink software to verify the proposed technology performance under partial shading condition. At last, the PV array emulation using RTDS and controlled DC amplifier under different weather conditions is described to demonstrate the PV emulator response under varying condition.
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