[논문]태양광 모듈 온도 영향에 따른 개방전압 추종을 위한 PV 시스템의 최대 전력 점 기법

서정민; 이우철

doi:10.6113/tkpe.2021.26.1.38

태양광 모듈 온도 영향에 따른 개방전압 추종을 위한 PV 시스템의 최대 전력 점 기법
Maximum Power Point Tracking Technique of PV System for the Tracking of Open Voltage according to Solar Module of Temperature Influence 원문보기

전력전자학회 논문지 = The Transactions of the Korean Institute of Power Electronics, v.26 no.1, 2021년, pp.38 - 45

서정민 (Dept. of Electronic and Electrical Engineering, Hankyong National University) , 이우철 (Electronic and Electrical Engineering, Institute for Information Technology Convergence, Hankyong National University)

Abstract ▼ AI-Helper

The photovoltaic module has the characteristic of changing its output characteristics depending on the amount of radiation and temperature, where the arrays that connect them in series and parallel also have the same characteristics. These characteristics require the MPPT technique to find the maximum power point. Existing P&O and IncCond cannot find the global maximum power point (GMPP) for partial shading. Moreover, in the case of Improved-GMPPT and Enhanced Search-Skip-Judge-GMPPT, GMPP due to partial shading can be found, but the variation in the open voltage during temperature fluctuations will affect the operation of the Skip and will not be able to perform accurate MPPT operation. In this study, we analyzed the correlation between voltage, current, and power under solar module and array conditions. We also proposed a technique to find the maximum power point even for temperature fluctuations using not only the amount of radiation but also the temperature coefficient. The proposed control technique was verified through simulations and experiments by constructing a 2.5 kW single-phase solar power generation system.

주제어

표/그림 (15)

그림 Fig. 1. Single phase solar power system.
그림 Fig. 2. Solar module P-V, I-V characteristic curve according to solar radiation.
그림 Fig. 3. P-I, I-V characteristic curve of the 3X2 solar array.
그림 Fig. 4. Solar array P-V, I-V characteristic curve according to temperature. (a) T = 25℃, (b) T = 0℃, (c) T = 65℃.
그림 Fig. 5. Proposed temperature MPPT algorithm.
그림 Fig. 6. Previous MPPT operation process. (a) (T = 25℃, 0℃), (b) (T = 25℃, 65℃).
그림 Fig. 7. Proposed temperature MPPT operation process. (a) (T = 25℃, 0℃), (b) (T = 25℃, 65℃)
그림 Fig. 8. Single phase solar power system simulation circuit.
그림 Fig. 9. Simulation results of previous MPPT operation. (a) (T = 25℃, 0℃), (b) (T = 25℃, 65℃).
표 TABLE I SIMULATION PARAMETER OF SOLAR POWER SYSTEM
그림 Fig. 10. Simulation results of the proposed temperature MPPT operation. (a) (T = 25℃, 0℃), (b) (T = 25℃, 65℃).
그림 Fig. 12. Experimental results of the proposed temperature MPPT operation (T = 25℃).
그림 Fig. 13. Experimental results of previous MPPT operation. (a) (T = 0℃), (b) (T = 65℃).
그림 Fig. 11. (a) Single phase solar power system, (b) Solar simulator (Elgar TerraSAS ETS 600).
그림 Fig. 14. Experimental results of the proposed temperature MPPT operation. (a) (T = 0℃), (b) (T = 65℃).

참고문헌 (9)

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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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