Study on Data Preprocessing Models for Development of Photovoltaic Module Fault Diagnosis Algorithm

Jungmin Moon; Ju-Hee Kim; Minkook Kim; Myungwoo Son; Joon-Young Jeon; Wonwook Oh; Yong-Hyun Kim; Changheon Kim

doi:10.7836/kses.2025.45.4.043

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2025 Vol.45, Issue 4 Preview Page Next Page

Research Article

Study on Data Preprocessing Models for Development of Photovoltaic Module Fault Diagnosis Algorithm 태양광 모듈 고장 진단 알고리즘 개발을 위한 데이터 전처리 모델 연구

30 August 2025. pp. 43-56

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Abstract

With the global push for climate change mitigation and sustainable energy transition, photovoltaic (PV) systems have emerged as a leading renewable energy source. As of 2023, global PV installations reached a record 444 GW, with continued growth expected in both international and domestic markets. However, the widespread adoption of PV systems has highlighted the importance of efficient maintenance and fault diagnosis. Performance degradation and failures in PV modules can result from various factors, including environmental conditions, manufacturing defects, and operational stress, leading to reduced energy output and economic losses. To ensure accurate fault diagnosis, reliable preprocessing of time-series data, such as current, voltage, and power output, is essential. This study presents a preprocessing model that combines outlier removal and missing value imputation using methods such as interquartile range, standard deviation, K-nearest neighbor, and mean-based approaches. The effectiveness of each preprocessing combination was evaluated based on data reliability (accuracy), which was visualized through graphs and metrics. The proposed pipeline provides a robust foundation for developing intelligent fault diagnosis algorithms and enhances data integrity for further analysis.

Keywords

Outlier Removal

Missing Value Imputation

Photovoltaic Module

Time-Series Data Preprocessing

Fault Diagnosis Algorithm

키워드

이상치 제거

결측치 보상

태양광 모듈

시계열 데이터 전처리

고장 진단 알고리즘

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Information

Publisher :Korean Solar Energy Society
Publisher(Ko) :한국태양에너지학회
Journal Title :Journal of the Korean Solar Energy Society
Journal Title(Ko) :한국태양에너지학회 논문집
Volume : 45
No :4
Pages :43-56
Received Date : 2025-07-15
Revised Date : 2025-08-04
Accepted Date : 2025-08-04
DOI :https://doi.org/10.7836/kses.2025.45.4.043

Journal of the Korean Solar Energy Society ISSN:1598-6411(Print) 2508-3562(Online) 한국태양에너지학회 논문집

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