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http://dx.doi.org/10.7469/JKSQM.2021.49.3.327

Identifying Process Capability Index for Electricity Distribution System through Thermal Image Analysis  

Lee, Hyung-Geun (Department of Industrial Engineering, INHA University)
Hong, Yong-Min (Department of Industrial Engineering, INHA University)
Kang, Sung-Woo (Department of Industrial Engineering, INHA University)
Publication Information
Journal of Korean Society for Quality Management / v.49, no.3, 2021 , pp. 327-340 More about this Journal
Abstract
Purpose: The purpose of this study is to propose a system predicting whether an electricity distribution system is abnormal by analyzing the temperature of the deteriorated system. Traditional electricity distribution system abnormality diagnosis was mainly limited to post-inspection. This research presents a remote monitoring system for detecting thermal images of the deteriorated electricity distribution system efficiently hereby providing safe and efficient abnormal diagnosis to electricians. Methods: In this study, an object detection algorithm (YOLOv5) is performed using 16,866 thermal images of electricity distribution systems provided by KEPCO(Korea Electric Power Corporation). Abnormality/Normality of the extracted system images from the algorithm are classified via the limit temperature. Each classification model, Random Forest, Support Vector Machine, XGBOOST is performed to explore 463,053 temperature datasets. The process capability index is employed to indicate the quality of the electricity distribution system. Results: This research performs case study with transformers representing the electricity distribution systems. The case study shows the following states: accuracy 100%, precision 100%, recall 100%, F1-score 100%. Also the case study shows the process capability index of the transformers with the following states: steady state 99.47%, caution state 0.16%, and risk state 0.37%. Conclusion: The sum of caution and risk state is 0.53%, which is higher than the actual failure rate. Also most transformer abnormalities can be detected through this monitoring system.
Keywords
Object Detection; Process Capability Index; Thermal Imaging Technology;
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