Knife switch monitoring system of gis equipment used in nuclear power plant

Abstract

The invention relates to the technical field of power transmission, distribution and protection of nuclear power plants, and provides a knife switch monitoring system for GIS equipment used in nuclear power plants. The GIS equipment includes a housing, and the housing includes an air chamber for accommodating a knife switch mechanism. The casing is provided with an inspection hole communicating with the gas chamber. The knife switch monitoring system includes: a monitoring device, one end of which is inserted in the inspection hole and is provided with a camera. The shooting direction of the camera faces the knife switch mechanism. The image information of the knife switch mechanism is collected through the inspection hole; the central processing device is connected with the signal of the monitoring device, and is used to select and receive the image information of the knife switch mechanism collected by the monitoring device; the display device is connected with the central processing device The signal connection is used to display the image of the knife switch mechanism collected by the monitoring device. The knife switch monitoring system can monitor the knife switch mechanism in real time and safely, thereby improving the accuracy of fault judgment.

Description

technical field [0001] The invention relates to the technical field of power transmission, distribution and protection of nuclear power plants, in particular to a knife switch monitoring system for GIS equipment used in nuclear power plants. Background technique [0002] GIS (GAS insulated SWITCHGEAR) is the English abbreviation of gas insulated fully enclosed combined electrical appliances. Such as figure 1 As shown, GIS is composed of circuit breaker, isolating switch, grounding switch, transformer, lightning arrester, bus bar, connector and outlet terminal, etc. These devices or components are all enclosed in a metal grounding shell, and a certain pressure is filled inside. SF6 insulating gas, so it is also called SF6 fully enclosed combined electrical appliances. [0003] GIS equipment has been widely used all over the world since it was put into practical use in the 1960s. Compared with conventional open substations, GIS has the advantages of compact structure, small...

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Problems solved by technology

[0006] In the actual production operation, there have been incidents where the transmission was not in place during the opening operation of the grounding knife switch, resulting in the failure of the two-phase grounding knife to operate, and the two-phase grounding protection occurred during the closing operation of the isolation switch, which tripped the parent phase circuit breaker. , although in order to avoid the recurrence of this incident, the nuclear power plant added a phase position indicator to initially improve the defect of the knife switch position indication, but for the deformation of the knife switch transmission connecting rod, the failure of the insulation support rod of the isolation knife switch in the gas chamber and the transmission Faults such as mechanism jamming cannot be effectively indicated, especially for the action of the knife switch contact inside the air chamber, the effective information cannot be confirmed

[0007] On the other hand, there is another way to confirm the operation of the knife switch in the air chamber at present. There is another way to install scaffolding between the intervals of the circuit breaker. Tools such as strong light sources of large and small sizes can be used to check the internal conditions. This method has the risk of people bumping and falling. Once the knife switch is not operated properly, such as arcing in the gas chamber, it will seriously damage the eyesight of the personnel who check the knife switch status on site, and even Cause direct blindness and endanger personal safety

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