电力电缆资产的状态评估与运维决策综述

With the development of urbanization in China, the amount of cable assets in the power network in China is fast growing, key to improving the service quality, to fulfilling the social responsibility and enhancing the investment return of the power grid is to improve the maintenance and management practice of the increasingly important cable assets. A significant amount of work has been recently published in the area of cable insulation materials, aging mechanisms, condition monitoring and diagnostics, and cable asset management. The present paper reviews and assesses the above research work. Based on ISO 55000 requirement, it proposes a flowchart and the procedure required to implement cable life cycle management. Then the paper reviews the current state-of-the-art in condition monitoring, condition assessment, aging modelling and the use of statistical tools for analysis of cable failure data. Finally it shows a risk based strategy of managing cable replacement. Based on the results of the retire decision, cable operation and maintenance staff can distinguish high risking and replacement needing cables. They could not only determine the annual number of retired cables, but also the cables to be retired.