All-weather air supplementation device applicable to multi-interval and multi-leak-point GIS equipment

Abstract

The invention provides an all-weather air supplementation device applicable to multi-interval and multi-leak-point GIS equipment. The device comprises an air supplementation unit which is used to supplement air for the GIS equipment during use, over one air supplementation pipe used to connect the air supplementation unit with the GIS equipment, a check valve which is fixed disposed on one end ofthe air supplementation pipe and connected to the GIS equipment during use, an air supply unit which is used to provide a supplementary air source for the air supply unit, a main connecting pipe whichis used to connect the air supply unit and the air supplementation unit in a ventilated manner, over two fans used for ventilation and heat dissipation of the air supplementation unit and the air supply unit, an air cylinder electric heating device which is used to heat an air supplementation cylinder in the air supplementation unit and an air cylinder in the air supply unit, an electric controlbox which is disposed in the air supplementation unit and used to implement master control, as well as a connecting cable used for electric connection between the air supply unit and the air supplementation unit. The device provided by the invention has the beneficial effects that simultaneous air supplementation can be realized for the multi-interval and multi-leak-point GIS equipment; the deviceis applicable to all weathers; applicability is high; and safety is high.

Description

technical field [0001] The invention relates to an air supply device for GIS equipment, in particular to an all-weather air supply device for GIS equipment suitable for multiple intervals and multiple leakage points. Background technique [0002] GIS equipment has been widely used in power systems. Due to product quality, manufacturing process, installation conditions and equipment aging, GIS equipment has different degrees of air leakage during long-term use, resulting in insufficient SF6 gas pressure inside the GIS gas chamber, which affects The insulation and arc extinguishing performance of GIS equipment may even cause accidents. For GIS gas chambers with serious leakage, the final solution is to power off and disassemble for maintenance, so as to fundamentally eliminate defects. However, the outage of power grid equipment cannot be simply stopped, it needs comprehensive Considering the load, operation mode, etc., the GIS equipment that cannot be dismantled and repaired ...

AI Technical Summary

Problems solved by technology

[0002] GIS equipment has been widely used in power systems. Due to product quality, manufacturing process, installation conditions and equipment aging, GIS equipment has different degrees of air leakage during long-term use, resulting in insufficient SF6 gas pressure inside the GIS gas chamber, which affects The insulation and arc extinguishing performance of GIS equipment may even cause accidents. For GIS gas chambers with serious leakage, the final solution is to power off and disassemble for maintenance, so as to fundamentally eliminate defects. However, the outage of power grid equipment cannot be simply stopped, it needs comprehensive Considering the load, operation mode, etc., the GIS equipment that cannot be dismantled and repaired in a short period of time can only be maintained by live gas supply.

The traditional method of replenishing gas generally adopts artificial on-site electrified gas replenishment, and its disadvantages are: manual gas replenishment is time-consuming, laborious, and inefficient, and the SF6 gas cylinder will have obvious frost when the temperature is below 10°C, and it is difficult to replenish gas manually , which increases the time of equipment instability and affects the safety of power distribution

[0003] First, it does not have real all-weather application capability: the automatic gas supply device generally needs to run for a long time, and the existing SF6 gas cylinders used for gas supply are usually installed exposed, without measures to prevent rain and high temperature exposure, and rainwater is easy to cause moisture Entering the GIS gas chamber causes the water content to increase, and it is easy to condense on the surface of the insulating material, resulting in a decrease in insulation. In severe cases, flashover breakdown occurs, reducing the arc extinguishing ability and shortening the life of the equipment. A large number of toxic and harmful substances are decomposed, which directly threatens human health; when the high temperature in summer, SF6 steel cylinders are exposed to outdoor high temperature conditions for a long time, explosion accidents will occur, which poses a great safety hazard, and the internal circuit boards and integrated components of the device cannot be used for a long time. Placed at high temperature, it may cause malfunction or shorten the service life; the SF6 equipment of CN104964163A can move the all-weather intelligent automatic air supply device, and its so-called all-weather only solves the problem of automatic air supply at low temperature by setting the heating device, which is not true. all-weather

[0004] Second, the existing device can only replenish air to a single air chamber at the same time, and does not have the function of replenishing air to multiple air leakage intervals at the same time with one device

[0005] Third, the existing device has no anti-pressure release measures at the gas supply port of the GIS equipment. If the gas in the SF6 gas cylinder is used up, the connection is loose, or the pipeline is broken, it will cause serious pressure release of the GIS equipment and a short circuit accident. Therefore, there is a greater potential safety hazard;

[0006] Fourth, the existing device generally carries only one SF6 gas cylinder at a time. If the GIS gas chamber has a large capacity and the gas leakage rate is fast, the service time of one SF6 gas is relatively short, and the gas cylinder must be replaced manually. The efficiency of automatic air supply and manual air supply is almost the same

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