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http://dx.doi.org/10.7836/kses.2014.34.2.001

Design of Buck Converter Controller in a Photovoltaic Power Conditioning System  

Park, Bong-Hee (Department of Electrical Engineering, Kwangwoon University)
Jeong, Seung-Whan (Department of Robot Engineering, Kwangwoon University)
Choi, Ju-Yeop (Department of Electrical Engineering, Kwangwoon University)
Choy, Ick (Department of Robot Engineering, Kwangwoon University)
Lee, Sang-Cheol (DGIST)
Lee, Dong-Ha (DGIST)
Publication Information
Journal of the Korean Solar Energy Society / v.34, no.2, 2014 , pp. 1-7 More about this Journal
Abstract
Generally, buck converter controller is designed to control the output voltage of the converter. However, design of the controller in a photovoltaic power conditioning system is different from theoretical design guideline. The controller in a photovoltaic power conditioning system controls the input voltage of the converter (the output voltage of the solar cell) to meet a maximum power point tracking (MPPT) performance. In this study, a new model for buck converter used in a photovoltaic power conditioning system is proposed, which is linearized after state-space averaging in each period. Also, mathematical expression of the modeled buck converter is interpreted separately as small and large signals; therefore its appropriateness is measured to design linear voltage and current controller.
Keywords
Buck Converter; State-space averaging method; Photovoltaic power conditioning system;
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