NOVEL HIGH GAIN DC-DC BOOST CONVERTER WITH QUASI-Z-SOURCE NETWORK
A novel high step-up quasi-Z-source DC-DC boost converter(HSQZSC)is proposed in the article to address the shortcomings of low voltage gain and high component voltage stress in traditional quasi-Z-source impedance network DC-DC boost converters.Firstly,the working principles of the two modes of operation of the HSQZSC converter are analyzed,and their steady-state analysis and parameter design are conducted.Secondly,a performance comparison with the proposed Z-source converter shows that the HSQZSC converter has the advantages of high voltage gain and low component voltage stress.Then,a state-space model is established for small-signal analysis,stability analysis,and controller design.Finally,a 100 W physical prototype is built,and experimental results verify the feasibility and effectiveness of the HSQZSC converter.
PV power generationDC-DC converterstopologyquasi-Z-sourcehigh gain
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