A 750kv Power Grid Secondary Equipment Status Evaluation Method Based on Information Fusion

Abstract

The invention discloses a state evaluation method based on information fusion for secondary equipment of a 750 kV power grid. The state evaluation method comprises the steps as follows: firstly, carrying out state evaluation on self-checking information of secondary equipment with real-time dynamic properties through a fuzzy comprehensive evaluation method; secondly, carrying out state evaluation on working state information through a Markov prediction method; thirdly, carrying out state evaluation on hidden fault data through a hidden fault judgment method; and lastly, fusing the evaluation results of the Markov prediction method, the fuzzy comprehensive evaluation method and the hidden fault judgment method in an information fusion way so as to give out a state evaluation result of the secondary equipment of the 750 kV power grid. According to the state evaluation result given by the method, a repair plan can be made more reasonably, so that excessive or inadequate repair is avoided.

Description

technical field [0001] The invention relates to the field of 750kV power grid secondary equipment state evaluation, in particular to a 750kV power grid secondary equipment state evaluation method based on information fusion. Background technique [0002] Whether the secondary equipment of the 750kV power grid can operate normally is directly related to the safe and stable operation of the power grid. Therefore, it is imperative to conduct condition-based maintenance for secondary equipment, and accurate condition assessment is the basis for realizing condition-based maintenance. At present, the methods used for state assessment of electrical secondary equipment mainly include the following technical methods: apply the probability method to establish a probability model for the relay protection device, because the secondary equipment of the 750kV power grid is generally a repairable system, it is generally not suitable to apply the probability method to evaluate. Through so...

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Problems solved by technology

Through some offline data such as: factory test, handover test, etc., the basic scoring of electrical secondary equipment is realized, but this method cannot realize the utilization of some real-time dynamic data of secondary equipment of 750kV power grid

At present, the methods used for state assessment of electrical secondary equipment are relatively single, and cannot make comprehensive use of various information of power grid secondary equipment for comprehensive state assessment.

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