Impact of partial shading on the P-V characteristics and the maximum power of a photovoltaic string

J. C. Teo, Rodney H.G. Tan, V. H. Mok, Vigna Kumaran Ramachandaramurthy, Chiakwang Tan

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A photovoltaic system is highly susceptible to partial shading. Based on the functionality of a photovoltaic system that relies on solar irradiance to generate electrical power, it is tacitly assumed that the maximum power of a partially shaded photovoltaic system always decreases as the shading heaviness increases. However, the literature has reported that this might not be the case. The maximum power of a partially shaded photovoltaic system under a fixed configuration and partial shading pattern can be highly insusceptible to shading heaviness when a certain critical point is met. This paper presents an investigation of the impact of partial shading and the critical point that reduce the susceptibility of shading heaviness. Photovoltaic string formed by series-connected photovoltaic modules is used in this research. The investigation of the P-V characteristic curve under different numbers of shaded modules and shading heaviness suggests that the photovoltaic string becomes insusceptible to shading heaviness when the shaded modules irradiance reaches a certain critical point. The critical point can vary based on the number of the shaded modules. The formulated equation in this research contributes to determining the critical point for different photovoltaic string sizes and numbers of shaded modules in the photovoltaic string.

Original languageEnglish
Article number1860
JournalEnergies
Volume11
Issue number7
DOIs
Publication statusPublished - 01 Jan 2018

Fingerprint

Shading
Strings
Partial
Photovoltaic System
Critical point
Module
Irradiance
Characteristic Curve
Susceptibility
Vary
Decrease
Configuration
Series

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

Cite this

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abstract = "A photovoltaic system is highly susceptible to partial shading. Based on the functionality of a photovoltaic system that relies on solar irradiance to generate electrical power, it is tacitly assumed that the maximum power of a partially shaded photovoltaic system always decreases as the shading heaviness increases. However, the literature has reported that this might not be the case. The maximum power of a partially shaded photovoltaic system under a fixed configuration and partial shading pattern can be highly insusceptible to shading heaviness when a certain critical point is met. This paper presents an investigation of the impact of partial shading and the critical point that reduce the susceptibility of shading heaviness. Photovoltaic string formed by series-connected photovoltaic modules is used in this research. The investigation of the P-V characteristic curve under different numbers of shaded modules and shading heaviness suggests that the photovoltaic string becomes insusceptible to shading heaviness when the shaded modules irradiance reaches a certain critical point. The critical point can vary based on the number of the shaded modules. The formulated equation in this research contributes to determining the critical point for different photovoltaic string sizes and numbers of shaded modules in the photovoltaic string.",
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Impact of partial shading on the P-V characteristics and the maximum power of a photovoltaic string. / Teo, J. C.; Tan, Rodney H.G.; Mok, V. H.; Ramachandaramurthy, Vigna Kumaran; Tan, Chiakwang.

In: Energies, Vol. 11, No. 7, 1860, 01.01.2018.

Research output: Contribution to journalArticle

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