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논문 기본 정보

자료유형
학술저널
저자정보
Jong-Rok Lim (Konkuk University) YongKi Min (Konkuk University) Tae-Hee Jung (Korea Institute of Energy Research) Jae-Hyun Ahn (Konkuk University) Hyung-Keun Ahn (Konkuk University)
저널정보
대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.15 No.5
발행연도
2015.10
수록면
577 - 584 (8page)

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A photovoltaic (PV) system generates electricity by installing a solar energy array; therefore, the photovoltaic system can be easily exposed to external factors, which include environmental factors such as temperature, humidity, and radiation. These factors—as well as shading, in particular—lead to power degradation. When there is an output loss in the solar cell of a PV module package, the output loss is partly controlled by the bypass diode. As solar cells become highly efficient, the characteristics of series resistance and parallel resistance improve, and the characteristics of reverse voltage change. A bypass diode is connected in parallel to the string that is connected in series to the PV module. Ideally, the bypass diode operates when the voltage is -0.6[V] around. This study examines the bypass diode operating time for different types of crystalline solar cells. It compares the reverse voltage characteristics between the single solar cell and polycrystalline solar cell. Special modules were produced for the experiment. The shading rate of the solar cell in the specially made solar energy module was raised by 5% each time to confirm that the bypass diode was operating. The operation of the bypass diode is affected not only by the reverse voltage but also by the forward bias. This tendency was verified as the number of strings increased.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. CHARACTERISTICS OF SOLAR CELL REVERSE VOLTAGE
Ⅲ. EXPERIMENTAL RESULTS AND CONSIDERATIONS
Ⅳ. EXPERIMENTAL RESULTS AND ANALYSIS
Ⅴ. CONCLUSION
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