Assessment method of health state of distribution primary device

Abstract

The present invention provides an assessment method of a health state of a distribution primary device. The method comprises the steps of: establishing an index layered space model expressing a stateof a distribution primary device; performing normalization processing of the indexes, distribution of index weight values and determination of object elements to be assessed; and establishing a classical domain model and a joint domain model, and calculating an association degree value of the indexes and the state of the device. According to the technical scheme, the assessment method of the health state of the distribution primary device employs an object element extendable integration assessment method of an improved association degree function to perform information fusion, the assessment system is flexible in grade division, an assessment result of a single index is more refined, a device integration assessment result is accurate and concrete, the computing process is simple, and therefore, the assessment method of the health state of the distribution primary device is suitable for assessment work of the states of distribution primary devices with large installation quantity and wide installation areas.

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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