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2021 Vol.41, Issue 2

Research Article

Correlation Analysis between Shading Analysis and Power Output in a Photovoltaic System

태양광 발전소의 음영 분석과 발전량 상관관계 분석

Wonwook Oh1*
,
Seonggeun Jeon2
,
Ayoung Yoon3
,
Daejang Kim3
,
hoonjoo Choi4
오 원욱1*
,
전 성근2
,
윤 아영3
,
김 대장3
,
최 훈주4
1R&D Director, STECO Corporation
2Assistant Researcher, STECO Corporation
3Researcher, STECO Corporation
4CEO, STECO corporation, Ph.D. Candidate, Department of Electrical Engineering Konkuk University
1(주)에스테코, 연구소장
2(주)에스테코, 주임연구원
3(주)에스테코, 연구원
4(주)에스테코, 대표이사, 건국대학교 전기공학과 박사과정
*Corresponding Author
30 April 2021. pp. 1-8
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Abstract

A photovoltaic (PV) string consists of PV modules that are connected in series. When partial shading occurs in the PV modules, the total PV string current is lowered. When the partial shading becomes severe, the bypass diode operates. Most PV systems are exposed to partial shading by nearby terrain, rather than an actual shaded flat environment. In this study, shading analysis was performed at 19 points of a 33.2 kWp solar power plant installed on the roof of a building, and the shaded irradiance ratio at the PV module location was estimated using this result. We compared the results of the performance ratio monitored for one year. As a result, the expected output ratio of the shading analysis compared to normal was found to be 89.6%, and the annual performance ratio was 90.2%.

Keywords
Partial shading
Power output loss
Monitoring
Performance ratio
Shading analysis
키워드
부분음영
발전량 손실
모니터링
발전성능
음영 분석
References
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Ministry of Trade, Industry and Energy, The 3rd Basic Energy Plan, 2019.
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Gilman, P., SAM Photovoltaic Model Technical Reference. No. NREL/TP-6A20-64102, National Renewable Energy Lab. (NREL), United States, 2015. 10.2172/1215213
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Mermoud, A. and Wittmer B., PVSYST User's Manual, Switzerland, 2014.
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Dierauf, T., Growitz, A., Kurtz, S., Cruz, J. L. B., Riley, E., and Hansen, C., Weather-corrected Performance Ratio (No. NREL/TP-5200-57991), National Renewable Energy Lab.(NREL), Golden, CO, United States, 2013. 10.2172/1078057
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Deline, C., Meydbray, J., and Donovan, M., Photovoltaic Shading Testbed for Module-level Power Electronics: 2016 Performance Data Update, No. NREL/TP-5J00-62471, National Renewable Energy Lab.(NREL), Golden, CO (United States), 2016. 10.2172/1324394
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Deline, C., Meydbray, J., and Donovan, M., Photovoltaic Shading Testbed for Module-level Power Electronics: 2014 Update, National Renewable Energy Laboratory, 2014.
Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 41
  • No :2
  • Pages :1-8
  • Received Date : 2021-01-06
  • Revised Date : 2021-02-16
  • Accepted Date : 2021-02-19
  • DOI :https://doi.org/10.7836/kses.2021.41.2.001
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