Analysis of Photovoltaic String Failure and Health Monitoring with Module Fault Identification

Rivai, Ahmad and Rahim, Nasrudin Abd and Elias, Mohamad Fathi Mohamad and Jamaludin, Jafferi (2019) Analysis of Photovoltaic String Failure and Health Monitoring with Module Fault Identification. Energies, 13 (1). p. 100. ISSN 1996-1073, DOI

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In this paper, photovoltaic (PV) string failure analysis and health monitoring of PV modules based on a low-cost self-powered wireless sensor network (WSN) are presented. Simple and effective fault detection and diagnosis method based on the real-time operating voltage of PV modules is proposed. The proposed method is verified using the developed health monitoring system which is installed in a grid-connected PV system. Each of the PV modules is monitored via WSN to detect any individual faulty module. The analysis of PV string failure includes several electrical fault scenarios and their impact on the PV string characteristics. The results show that a degraded or faulty module exhibits low operating voltage as compared to the normal module. The developed health monitoring system also includes a graphical user interface (GUI) program which graphically displays the real-time operating voltage of each module with colors and thus helping users to identify the faulty modules easily. The faulty modules identification approach is further validated using the PV module electroluminescence (EL) imaging system. © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (

Item Type: Article
Funders: UM Power Energy Dedicated Advanced Centre (UMPEDAC), University of Malaya under the Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC-2018 (MOHE HICOE-UMPEDAC), RU007-2018, and RU012-2019
Uncontrolled Keywords: photovoltaic module fault detection; graphical user interface; photovoltaic string; health monitoring; Internet of Things; self-powered wireless sensor network
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 03 Feb 2020 03:16
Last Modified: 03 Feb 2020 03:16

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