Study on Hot-spot Simple Diagnosis System for PV Generation System

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420253
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Kanagawa Institute of Technology
• Principal Investigator: Itako Kazutaka 神奈川工科大学, 工学部, 教授 (10232381)
• Research Collaborator: YATSUDA Yuji
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ホットスポット現象 / 太陽電池モジュール / 結晶欠陥

Outline of Final Research Achievements

This study proposes a voltage-based hot-spot detection method for photovoltaic (PV) string using the projector. Hot-spots form in solar cells at defects causing a high carrier recombination rate, it appears as a high reverse leakage current of p-n junctions when solar cells are partially shadowed. Using this characteristic, we developed a voltage-based hot-spot detection method to quickly identify and characterize the severity of a module hot-spot for one module and plural modules in the string. From the experimental results, it is verified this proposed voltage-based hot-spot detection method works effectively for PV string in outdoor system.

Free Research Field

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