Air box for simulating partial discharge phenomenon in inflatable cabinet

Abstract

The invention discloses an air box for simulating a partial discharge phenomenon in an inflatable cabinet, which is equivalent to a device for detecting partial discharge. As the inflatable cabinet isfilled with sulfur hexafluoride gas, the partial discharge inside a GIS can be assumed to be a partial discharge in the inflatable cabinet, the discharge principles are mainly due to defects, and therefore, the partially discharged GIS device can be simulated as the air box for the partial discharge phenomenon in the inflatable cabinet. The device comprises: a GIS housing, a high voltage conductor, a basin-type insulator, a UHF sensor, a cable and the like, wherein the GIS is internally filled with the sulfur hexafluoride gas, and is composed of the high voltage conductor and the basin-type insulator; the UHF sensor is installed outside the basin-type insulator, and is used for monitoring partial discharge signals; after that, a matching circuit is first connected to the sensor through the cable, and then the matching circuit is connected to an oscilloscope, which is used to perform filtering, amplification and other processing on the signals to form a set of systematic GIS partial discharge online monitoring device. The scheme of the invention has the advantages of high reliability, simple structure, strong anti-interference and the like.

Description

technical field [0001] The invention relates to the field of GIS partial discharge monitoring, in particular to an air box for simulating the partial discharge phenomenon in an inflatable cabinet. Background technique [0002] 1. The inflatable cabinet is a kind of indoor and outdoor AC and DC high-voltage gas-insulated metal-enclosed switchgear. It is a new type of switchgear. The whole cabinet is combined with air insulation and sulfur hexafluoride gas compartment. Widely used in distribution networks, the inflatable cabinet has the characteristics of compact structure, flexible operation and high reliability. [0003] 2. Inside the inflatable cabinet filled with sulfur hexafluoride, on the one hand, when the switch inside the inflatable cabinet contacts the contact switch, partial discharge will be generated at the contact position; During the process, different types of defects will be generated inside, and partial discharge will be generated during the switching operat...

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Problems solved by technology

[0003] 2. Inside the inflatable cabinet filled with sulfur hexafluoride, on the one hand, when the switch inside the inflatable cabinet contacts the contact switch, partial discharge will be generated at the contact position; During the process, different types of defects will be generated inside, and partial discharge will be generated during the switching operation, which will affect the safe operation of the inflatable cabinet

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