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GIS partial discharge state evaluation method, recording medium and system

A technology for partial discharge and state evaluation, applied in the direction of testing dielectric strength, etc., can solve problems such as difficulty in fully reflecting the operating state of equipment, false alarms from monitoring devices, and lack of decision-making support for monitoring devices for on-site operation and maintenance personnel, so as to achieve accurate control of operation state, the effect of reducing bias

Pending Publication Date: 2021-11-12
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +4
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Problems solved by technology

[0002] In recent years, there have been many GIS breakdown and tripping failures in the State Grid Corporation of China every year, causing serious losses
The main reason is that the current GIS partial discharge monitoring method is mainly UHF monitoring, which is single. On the one hand, it is difficult to fully reflect the operation status of the equipment; Operation and maintenance personnel lack support for processing and decision-making after monitoring device alarms
Ultrasound and SF 6 The gas component monitoring method is not subject to electromagnetic interference and can locate partial discharges. However, using ultrasonic monitoring alone will cause errors caused by interference from different vibration sources, while using SF alone 6 The long response time of the gas composition monitoring method brings reliability and validity problems to the evaluation results

Method used

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  • GIS partial discharge state evaluation method, recording medium and system
  • GIS partial discharge state evaluation method, recording medium and system
  • GIS partial discharge state evaluation method, recording medium and system

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Embodiment Construction

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described below, and the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making innovative efforts fall within the protection scope of the present invention.

[0019] First, the step-up method is used to counteract the SF 6 The test voltage is applied to the typical GIS insulation defects in the gas. Typical GIS insulation defects refer to metal protrusions, free conductive particles, air gaps outside the insulator, and contamination along the surface of the insulator. Obtain its discharge starting voltage U 0 and breakdown voltage U b , from U 0 and U b Choose between different voltage levels to carry out part...

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Abstract

The invention belongs to the technical field of electrical insulation testing, and discloses a totally-sealed SF6 gas-insulated switchgear (GIS) partial discharge state evaluation method. The method comprises the following steps of respectively extracting three different dimensions for measuring characteristic quantities of a GIS partial discharge state, fusing the multi-source characteristic quantities by using a fuzzy comprehensive evaluation method and a DS evidence theory, and evaluating the GIS partial discharge state. By adopting the GIS partial discharge state evaluation method, errors caused by various existing partial discharge monitoring methods are effectively reduced, the operation state of GIS equipment is accurately mastered, and the method is suitable for online monitoring of the GIS equipment in operation. The invention further provides a non-transient readable recording medium storing a GIS partial discharge state evaluation program and a device comprising the medium, and the compressed program can be called by a processing circuit to execute the method.

Description

technical field [0001] The invention relates to the technical field of electrical insulation testing, and discloses a fully enclosed SF 6 Evaluation method for partial discharge status of gas-insulated switchgear (GIS). Background technique [0002] In recent years, the State Grid Corporation has experienced many GIS breakdown and tripping faults every year, causing serious losses. The main reason is that the current GIS partial discharge monitoring method is mainly UHF monitoring, and the method is single. On the one hand, it is difficult to fully reflect the operation status of the equipment; Operation and maintenance personnel lack the support for processing and decision-making after monitoring device alarms. Ultrasound and SF 6 The gas composition monitoring method is free from electromagnetic interference and can locate partial discharges, but the ultrasonic monitoring method alone will have errors caused by the interference of different vibration sources, and the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 杨旭张静李梦齐徐惠刘梦娜黄立才罗传仙刑新良
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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