SIMULATION OF SURFACE CHARGE DISSIPATION OF INSULATING BACKSHEETS FOR FLEXIBLE PHOTOVOLTAIC MODULE UNDER VARIOUS TEMPERATURE CONDITIONS

Jia-Wei Zhang, Tian-Hao Li and Wei Zhang
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Jia-Wei Zhang: School of Electrical Engineering, Xi’an University of Technology, No. 5 Jinhua South Road, Xi’an, Shannxi 710048, P. R. China
Tian-Hao Li: #x2020;School of Electrical Engineering, Northeast Electric Power University, No. 169, Changchun Road, Jilin City 132012, P. R. China
Wei Zhang: #x2021;No. 699 Industrial and Commercial Street Power Supply Company, Mouping District, Yantai City, 264100 Shandong Province, P. R. China

Surface Review and Letters (SRL), 2020, vol. 27, issue 11, 1-9

Abstract: Because of excellent mechanical properties, thermal insulation and ideal radiation resistance, polyimide (PI) is one of the best choices as a flexible solar backsheet in photovoltaic systems. In this study, accumulation characteristics of surface charge of PI backsheet under temperature-controlled corona polarization were investigated both theoretically and experimentally. In order to investigate the surface charge accumulation of PI backsheet under the effect of different temperatures, finite element method (FEM) was used. The mechanisms by which the temperature influenced accumulation and decay processes of the surface charge of the PI backsheet were investigated. The results show that the carrier mobility of PI backsheet increased in the stages of charge accumulation and charge decay, which then has an indirect effect on the dynamic characteristics of the surface charge. Charge accumulation decreases with the increase of temperature, and both accumulation process and decay process occurred simultaneously. The results of this study provide theoretical support for the modification of PI backsheet. At the same time, a practical theoretical method for modeling and simulating the charge diffusion of insulating PI backsheet under the influence of temperature was explored.

Keywords: Polyimide insulating backsheet; temperature-controlled corona discharge; analogue simulation; surface charge accumulation (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1142/S0218625X19502305

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