Priority Assessment Model of On-line Monitoring Devices Investment for Power Transformers

Abstract

Finding an appropriate way to improve the investment comprehensive benefits for on-line monitoring is a new issue for power industry. In this paper, a priority assessment model for transformer on-line monitoring is proposed. The assessment model consists of device level and system level. The device level is divided into property assessment and operation assessment. The details of vari-ous assessment methods were described in the following sections, including device property assessment based on fuzzy analytic hierarchy process(FAHP), operation condi-tion assessment method based on condition assessment technology and system level assessment method based on risk benefits index. An actual grid is utilized to validate the model and the numerical results illustrate that: the proposed assessment model can provide an appropriate on-line monitoring investment order for transformers. It also verifies that considering multiple aspects related to the target problem could give a more comprehensive as-sessment result than just considering just one or two of them. This paper provides a feasible solution to achieve more investment benefits for transformer online monitor-ing, which can provide on-line monitoring investment references for power industry.