태양광 발전 시스템에서의 벅 컨버터 제어기 설계
Design of Buck Converter Controller in a Photovoltaic Power Conditioning System
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초록
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 controllers.
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 controllers.
참고문헌 (4)
- Ned Mohan, "Power Electronics: Converters, Applications, and Design", pp.161~172 (2003), John Wiley & Sons, Inc
- Moussa, W. M., "Comparison between state space averaging and PWM switch for switch mode power supply analysis", Southern Tier Technical Conference, pp.15~21 (1990)
- Enslin, J. H. R., "Integrated photovoltaic maximum power point tracking converter", IEEE Transactions on Industrial Electronics, 44(6), pp.769~773 (1997)
- New Renewable Energy Center in the korea Energy Management Corporation, "Renewable Portfolio Standard", ~