Optimisation of maintenance and replacement strategies for transmission overhead line systems

Pao Yue-kong Library Electronic Theses Database

Optimisation of maintenance and replacement strategies for transmission overhead line systems


Author: Lau, Siu-ki
Title: Optimisation of maintenance and replacement strategies for transmission overhead line systems
Degree: M.Sc.
Year: 1997
Subject: Electric lines -- Maintenance and repair
Total productive maintenance
Electric power transmission
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Pages: viii, 190 leaves : ill. ; 30 cm
Language: English
OneSearch: https://www.lib.polyu.edu.hk/bib/b1437009
URI: http://theses.lib.polyu.edu.hk/handle/200/3947
Abstract: The aim of this dissertation project is to formulate the most cost-effective maintenance strategy which is risk managed and reliability accepted in relations to the operations and maintenance activities of Transmission Overhead line system in CLP. The benchmarking exercise on the performance efficiency and the cost effectiveness of the running maintenance mode of the system has been carried out in recent time and there is indication of room for improvement in order to achieve the world's best practice. Cost beneficial strategy on each of the maintenance activities is to be developed, of these form the core initiatives of the project. Generic review on the reliability-based maintenance management concept, assessment of the current maintenance practices, and the formulation of the best fit methodology are carried out in achieving the aim and objectives of the dissertation project. The model application and the developing framework also demonstrate the degree of pertinence assessment and the cost justification so as to provide different perspectives for management judgment. Various maintenance management philosophies such as the Total Productive Maintenance, Total quality Maintenance, Reliability Centered Maintenance, risk-based maintenance and other maintenance optimization methods are examined with their applicability investigated. The reliability performance of the overhead line system is assessed and measured against other electric utilities. Methodologies are developed to estimate the customer loss due to load curtailment. The corporate Reliability-Centered Maintenance corporate program is developed to manage the equipment performance and to provide platform for optimal maintenance strategies formulation. By compiling the equipment hierarchy, standard failure modes, risk and criticality matrices, and decision logic into the Reliability-Centred Maintenance framework, the optimal maintenance strategies are recommended with the support of cost-benefit comparison. Statistical models applied from Weibull analysis and assets replacement model are developed to help in justifying the maintenance and replacement decisions. The success of the model simulation and the application of the risk managerial tools give measures for profitable business decision making in other Transmission maintenance activities.

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