GIS constant-pressure air complementing device

Abstract

The invention relates to the air complementing field of SF6 electrical equipment, in particular to a GIS constant-pressure air complementing device which comprises an air-filling steel cylinder connector and a GIS equipment air-filling connector, and further comprises a second pressure detecting module used for detecting pressure of the steel cylinder and a first pressure detecting module used for detecting pressure of a GIS body. The GIS constant-pressure air complementing device is characterized in that the air-filling steel cylinder connector is connected with a steel cylinder through a steel cylinder connecting pipeline; and the GIS equipment air-filling connector is connected with a GIS body air complementing connector through a GIS connecting pipeline. The GIS constant-pressure air complementing device has the beneficial effects that: the first pressure detecting module and the second pressure detecting module are used for feeding a detected dual-end pressure value to a CPU control system, so that state judgment is automatically realized, man-powered intervention is not needed, and time and labor power are saved; an automatic control system can be used for realizing automatic constant-pressure air complementation by controlling an electric ball valve, equipment-terminal principle is guaranteed to be constant all the time, and occurrence of hazardous conditions is avoided; and an automatic alarm unit can send out alarm information or a remote transmitting alarm signal when equipment is abnormal.

Description

technical field [0001] The invention relates to the field of gas replenishment for SF6 electrical equipment, in particular to a GIS constant pressure gas replenishment device. Background technique [0002] In recent years, with the rapid development of my country's electric power industry and the improvement of technical equipment, a large number of SF6 electrical equipment has been put into operation. SF6 gas has been widely used in power systems due to its excellent insulation and arc extinguishing properties, and has almost become a medium The only insulating and arc extinguishing medium used in high voltage, high voltage and extra high voltage switches. At present, in my country's 63 ~ 750KV power system, SF6 gas insulated circuit breakers and SF6 gas insulated substations (GIS) have been widely used, so the daily supervision of SF6 electrical equipment is becoming more and more important. Due to the long-term operation of SF6 equipment, there is an air leakage phenomeno...

AI Technical Summary

Problems solved by technology

Due to the long-term operation of SF6 equipment, there is an air leakage phenomenon far exceeding 1% of the annual leakage rate, but due to the high voltage level, the high cost of power outage maintenance, and the impact of social influence, it is impossible to perform power outage maintenance within a certain period of time. Requires frequent, occasional refills

[0003] The following problems exist in irregular and frequent air replenishment operations: 1) A lot of human resources are wasted

The rated working pressure of GIS is about 0.7MPa. If it is lower than this value, air supply is required. When the leakage rate is greater than 1%, the air supply operation needs to be carried out every 2 weeks on average. The maintenance company needs to use certain human resources for this. cause waste of human resources

2) Waste of a lot of material resources

The structural characteristics of the existing steel cylinder heating device are: 1. The pressure reducing valve is used to control the amount of air supply, and the staff must always pay attention to the value of the pressure reducing valve; 2. There is no pressure detection unit at the far end of the pipeline and no pressure feedback in the GIS, which requires the staff to manually stop Air supply work

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