Method for comprehensively evaluating insulation status of gas insulated switchgear (GIS)

Abstract

The invention belongs to the technical field of online monitoring and evaluation of insulation statuses of a gas insulated switchgear (GIS), and particularly relates to a method for comprehensively evaluating the insulation status of the gas insulated switchgear (GIS). The method mainly comprises the steps of GIS insulation status evaluation index system framework construction, GIS insulation evaluation index weight calculation, GIS insulation status partition based on a fuzzy theory, and multi-source status evaluation mathematical model fusion based on an evidence theory. The method involves evaluation indexes, is comprehensive and reliable in evaluation model, has simple and clear evaluation results, and can be popularized and applied to actual engineering fields. In consideration of limited running condition of the GIS, a comprehensive index system reflecting the insulation status of equipment can be constructed by using complementary information under different monitoring conditions, and the fuzzy theory and a data fusing theory are introduced in conjunction with expert experience, so that comprehensive evaluation of the insulation status of the GIS equipment is realized, and a comprehensive and reliable scheme is provided for multi-source information evaluation of the same type of equipment.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring and evaluation of the insulation state of a gas-insulated combined electrical appliance, and in particular relates to a comprehensive evaluation method for the insulation state of a gas-insulated combined electrical appliance. Background technique [0002] With the acceleration of social industrialization, more and more power equipments are being put into operation, and the coverage area is getting bigger and bigger. The power outage accidents caused by the failure of power equipment not only bring inconvenience to life, but also cause serious economic losses. While doing a lot of research on the reliability of power systems, the reliability of power equipment cannot be ignored, especially the aging problem of equipment insulation performance under the combined effects of various complex factors such as operating voltage and ambient temperature / humidity. [0003] Gas Insulated Switchgea...

AI Technical Summary

Problems solved by technology

[0006] Due to the compactness and complexity of the internal space structure of GIS, it is extremely difficult to evaluate and repair GIS internally, and the propagation of faults in the limited internal space will also affect the performance of non-faulty components, causing a wider range of faults

The average power outage time required to repair a GIS equipment is longer than that of conventional substations, resulting in greater economic losses

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