Fault tree and analytic hierarchy process based evaluation method of state of power transformer

Abstract

A fault tree and analytic hierarchy process based evaluation method of the state of a power transformer specifically comprises the steps of performing analysis on fault factors; establishing a comprehensive evaluation index system of the state of the power transformer; building a judgment matrix by the three-scale analytic hierarchy process; sorting and calculating every index weight; calculating comprehensive indexes of the power transformer; grading the comprehensive indexes of the power transformer. According to the fault tree and analytic hierarchy process based evaluation method of the state of the power transformer, the reasonable comprehensive evaluation index system of the state of the power transformer is established through the analysis by the fault tree method, meanwhile a three-scale analytic hierarchy process based comprehensive evaluation model of the state of the power transformer is disclosed, and accordingly the comprehensive evaluation on the state of the power transformer is objective, the man-made influence factors are effectively reduced, and the operation personnel can understand the state of the power transformer, determine the level of the power transformer and arrange a maintenance plan reasonably through the comprehensive evaluation on the state of the power transformer.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation equipment, and in particular relates to a method for comprehensively evaluating the state of a power transformer based on a fault tree method and an analytic hierarchy process. Background technique [0002] The transformer is one of the most critical equipment in the power system. Improving the operational reliability of the transformer is of great significance to the safe and reliable operation of the entire power grid and to reduce the operating cost of the power grid. Determining the state of the transformer is the core and basis of the implementation of condition-based maintenance. For a long time, my country has mainly carried out periodic maintenance of power transformers based on the "Guidelines for Maintenance of Power Transformers" and "Procedures for Preventive Tests of Electrical Equipment". value, but cannot directly reflect the state of the transformer. C...

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Problems solved by technology

Determining the state of the transformer is the core and basis of the implementation of condition-based maintenance. For a long time, my country has mainly carried out periodic maintenance of power transformers based on the "Guidelines for Maintenance of Power Transformers" and "Procedures for Preventive Tests of Electrical Equipment". value, but cannot directly reflect the state of the transformer

Conventional after-event maintenance and periodic maintenance monitoring methods are not compatible with the development trend of modern condition-based maintenance. In order to ensure the reliability of power supply in the power system, comprehensively evaluate the status of transformers, and then reasonably arrange maintenance and repair work to reduce equipment damage caused by periodic maintenance strategies. And voluntary waste has become an inevitable trend

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