영광 1,2호기 발전소 열화상 진단을 통한 예측정비 방안 분석 연구

Abstract

Predictive maintenance(PdM)assumes that all equipment will deteriorate and partial or complete loss of function will occur. PdM monitors the condition or performance of plant equipment through various technologies. The data are obtained, analyzed, trended, and used to predict equipment failures. When equipment failure timing is known, then actions can be taken to prevent or delay failure. This allows equipment reliability to remain high. Thermal measurement technology measures the absolute or relative temperatures of key equipment parts or areas being monitored. Abnormal temperatures indicate developing problems. Temperature and thermal behavior of plant components are the most critical factors in the maintenance of plant equipment. For this reason, temperature is frequently considered the key to successful plant maintenance and is the frequently measured quantity. Maintenance is conducted every six months to two years on all the 428(in Young Gwang NPP #1,2) plant thermography diagnosis equipment to be inspected including pumps, fans, transformers. Through the thermography measurement, there was a abnormal temperature detected recently on the transformers and pumps which was promptly responded to before showing any signs of malfunction, contributing to improving reliability of the facility. In case of the high-voltage switchgear, for the safety of the thermography inspector, additional safety precautions should be taken by installing the thermography measurement inspection window on the transformer’s panel door.