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2023 Vol.43, Issue 2 Preview Page

Research Article

KMA Open-API Weather Information based Performance Evaluation and Fault Detection Remote Monitoring System for Small and Medium-Scale PV Systems

기상청 개방형-API 기상정보 기반 중·소규모 태양광발전 성능평가 및 고장감지 원격 모니터링시스템

Hee Won Lim1
,
Il Kwon Kim2
,
U Cheul Shin3*
임 희원1
,
김 일권2
,
신 우철3*
1Ph.D. Candidate, Department of Architectural Engineering Graduate School, Daejeon University
2MS. Course, Department of Architectural Engineering Graduate School, Daejeon University
3Professor, Department of Architectural Engineering, Daejeon University
1대전대학교 대학원 건축공학과, 박사과정수료
2대전대학교 대학원 건축공학과, 석사과정
3대전대학교 건축공학과, 교수
*Corresponding Author
30 April 2023. pp. 65-78
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Abstract

Small and medium-sized unmanaged grid-connected photovoltaic (PV) systems are difficult to manage owing to the installation costs of monitoring systems. Consequently, they can be left unattended for a long time following break downs. Thus, in this study, we developed a low-cost remote monitoring system for small-sized PV systems. The proposed monitoring system is equipped with a failure detection algorithm based on the simulation of an active system that accurately predicts the power output under normal operating conditions. Additionally, the monitoring system can recognize and notify a failure when the actual power generation is abnormally low. To lower the cost, we utilized SBC as a data server by edge computing and designed a monitoring system using the open-source software openHAB. Moreover, we used an open-API (ground weather observation data) provided by the Korea meteorological administration (KMA) to obtain hourly weather data (horizontal radiation, outdoor temperature, wind speed, etc.) for free to use in the simulation analysis. The Shewhart control chart was used as a benchmark for fault detection, where the ratio of the measured power generation to simulated generation was set as the observed value. From the verification test for actual grid-connected PV systems, it was confirmed that the monitoring system can effectively identify the occurrence of abnormal operating conditions, such as open-circuit, partial shading, etc.

Keywords
Open-API
Fault detection
Shewhart control chart
Remote monitoring system
PV system
키워드
개방형 인터페이스
고장감지
슈하르트 관리도
원격모니터링시스템
태양광발전시스템
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Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 43
  • No :2
  • Pages :65-78
  • Received Date : 2023-03-09
  • Revised Date : 2023-04-04
  • Accepted Date : 2023-04-05
  • DOI :https://doi.org/10.7836/kses.2023.43.2.065
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