Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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A Study on Development of Power Analysing Device for PV Module

태양전지 모듈의 발전량 분석 장치 개발에 관한 연구

  • Moon, Chae-Joo (Dept. of Electrical Engineering, Mokpo National University) ;
  • Kwak, Seung-Hun (Dept. of Electrical Engineering, Mokpo National University) ;
  • Jang, Yeong-Hak (Dept. of Control Robot Engineering, Mokpo National University) ;
  • Kim, Tae-Gon (New & Renewable Energy Research Institute, Mokpo National University) ;
  • Kim, Eui-Sun (Dept. of Information & communication Engineering, Shin Gyeong University) ;
  • Kim, Tae-Hyun (Dept. of Electrical Engineering, Myongji College)
  • 문채주 (목포대학교 전기공학과) ;
  • 곽승훈 (목포대학교 전기공학과) ;
  • 장영학 (목포대학교 제어로봇공학과) ;
  • 김태곤 (목포대학교 신재생에너지연구소) ;
  • 김의선 (신경대학교 인터넷정보통신학과) ;
  • 김태현 (명지전문대학교 전기과)
  • Received : 2010.09.30
  • Accepted : 2010.12.02
  • Published : 2010.12.30
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Abstract

This study was conducted to estimate the relative performance of modules with changed characteristics due to long term exposure to the outdoor environment, with a specially made test device for simultaneous measurement of real time power output from the photovoltaic array, taking into account the inclined panel, direct irradiation, power being generated, temperature as well as the optimal analysis timing. In terminology description, M is an abbreviation of module and Group A, Group B are 10 modules series connection (1~10 of M), (11~20 of M) for each of them respectively. The overall mean voltage difference of M-18 with the lowest power output and M-14 with the highest output is-2.13V and it was identifiable that voltage difference was more concentrated to Group B. In addition, in case of M-2 and M-7, M-8, when compared with M-14, the overall mean voltage difference was -0.92V, -1.56 and -0.91V respectively showing the more concentration to Group A. When the temperature of module went up by $1^{\circ}C$, the mean voltage was reduced by 0.35V. For current, Group A was lower than Group B by-0.022A and the ratio of each group was 49.68% and 50.32% respectively, presumably the module with deteriorated properties were more concentrated to Group A relatively. From the comparison of relations with the comprehensive accumulation, M-2, M-7, M-8, M-16 and M-18 were those with deterioration of performance to the worst, thereby requiring precision examination. In comparative efficiency, M-14 was the most excellent one as 12.19% while M-18 as 10.53% was identified that its efficiency was comparatively rapidly reduced.

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References

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