A method for evaluating the health status of power distribution main equipment

Abstract

The invention provides a method for evaluating the health state of main power distribution equipment, which includes establishing an index layered space model that characterizes the state of main power distribution equipment; performing normalization processing on the indicators, assigning index weight values, and determining the objects to be evaluated Element; establish classical domain and node domain models and calculate the correlation value between indicators and equipment status. The technical solution provided by the present invention adopts the matter-element extension comprehensive evaluation method of the improved correlation function for information fusion, the evaluation system grade division is flexible, the evaluation result of a single index is more refined, the overall evaluation result of the equipment is accurate and specific, and the calculation process is simple and applicable. It is suitable for the status assessment of power distribution equipment with a large number of installations and a wide installation area.

Description

technical field [0001] The invention relates to the state evaluation technology of electrical equipment, in particular to a method for evaluating the health state of main power distribution equipment. Background technique [0002] With the gradual expansion of the smart grid to the distribution network, the power distribution system is getting more and more attention, and the status of the main power distribution equipment such as transformers, switch cabinets, power cables, overhead lines, etc. Affecting the safe, stable and economical operation of the entire power distribution system. In the existing technology, the methods for evaluating the health status of power distribution equipment are mainly AHP and fuzzy comprehensive evaluation methods. Most of the research objects are transformers. There are few studies on cables and overhead lines. There are many factors that affect the status of power distribution main equipment, and the relationship between each factor is int...

AI Technical Summary

Problems solved by technology

[0002] With the gradual expansion of the smart grid to the distribution network, the power distribution system is getting more and more attention, and the status of the main power distribution equipment such as transformers, switch cabinets, power cables, overhead lines, etc. Affecting the safe, stable and economical operation of the entire power distribution system. In the existing technology, the methods for evaluating the health status of power distribution equipment are mainly AHP and fuzzy comprehensive evaluation methods. Most of the research objects are transformers. Less research on cables and overhead lines

There are many factors that affect the status of power distribution main equipment, and the relationship between each factor is intricate. Both the analytic hierarchy process and the fuzzy comprehensive evaluation method can realize the effective fusion of various evaluation indicators, but the analytic hierarchy process is a relatively elementary fusion method. As the basis of other fusion technologies, for example, the fuzzy comprehensive evaluation method is generally based on the analytic hierarchy process, and the final status of the equipment is judged by calculating the membership degree. There is no unified and perfect standard, and the evaluation results are often ambiguous, which has encountered great resistance in practical application

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