NDLI: Hot spot detection and prevention using a simple method in photovoltaic panels

Content Provider	IET Digital Library
Author	Ghanbari, Teymoor
Abstract	Hot spot in photovoltaic panels has destructive impact on the system, which results in early degradation and even permanent damage of panels. Using conventional bypass diode to prevent hot spotting is not a perfect remedy and more efficient techniques are necessary. In this study, a simple technique is proposed for detection of hot spotting. Also, an efficient method is utilised for protection of the panels against hot spotting. The detection method is based on equivalent DC impedance (EDCI) of the panel's strings, which has useful signatures for hot spot detection. The EDCI monitoring of the panel's strings is performed using a current sensor and several simple resistive voltage dividers. After the detection, hot spotted string is open circuited using a two-state relay. The performance of the proposed method is confirmed using some experiments. The results confirm high capability of the proposed technique for hot spot detection and protection.
Starting Page	883
Ending Page	890
Page Count	8
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 4, Mar (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0794
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-03-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Current Sensor EDCI Monitoring Equivalent DC Impedance Hot Spot Detection Hot Spot Prevention Hot Spotting Photoelectric Conversion Photovoltaic Panels Resistive Voltage Divider Solar Cell And Array Spot Protection Two-state Relay
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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