115kV Circuit breaker analysis for maintenance plan

Abstract

HV power distribution system circuit breaker are important devices in substations. Such as Malfunction or deterioration of equipment with in the substation, will directing impact on the stability of the power distribution system and affect the reliability of the system. In addition, this means that it is necessary to assess the actual condition of the proper condition-based operation and maintenance. Thus, this thesis presents condition assessment procedure for equipment by using technical information visual inspection by Weighted Scoring Method. Weighting technique is used to determine important weight testing methods of devices by using Analytic Hierarchy Process (AHP). Testing methods for circuit breaker are such as visual inspection, contact timing test. Scoring technique is divided into 1-3 levels by classifying on actual evaluate equipment consisting of consisting of good, moderate, bad. This thesis proposes a software development in order to organize the database and calculate the analysis of the condition of equipment in 5 HV substations. The evaluation results will be divided into 3 levels good, medium and bad condition. According to the evaluation level, the maintenance types are separated into 1) regular maintenance 2) increase the frequency of maintenance and monitoring of the test 3) equipment must be improved urgently. Finally, abnormal incidents of equipment and cost of HV equipment maintenance can be reduced in effective way.