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A kind of SF6 electrical equipment on-line gas supply method

A kind of electrical equipment, SF6 technology, applied in the field of SF6 electrical equipment online gas supply, can solve the problems of inability to cut off power at any time, difficulty in ensuring electrical safety, high cost, etc., achieve intelligence and automation, solve electrical safety problems, and reduce manpower requirements Effect

Active Publication Date: 2020-09-04
STATE GRID ANHUI ULTRA HIGH VOLTAGE CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many substations are unattended. Once SF6 electrical equipment leaks, it must be repaired manually. The manpower demand is high, the cost is high, and it is difficult to guarantee the timeliness of maintenance. Second, many substations have many power supply nodes and cannot be repaired at any time. Power failure, at this time, even if the SF6 electrical equipment leaks, it must continue to work, and it is difficult to ensure electrical safety

Method used

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  • A kind of SF6 electrical equipment on-line gas supply method
  • A kind of SF6 electrical equipment on-line gas supply method
  • A kind of SF6 electrical equipment on-line gas supply method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] refer to figure 1 , a kind of SF that the present invention proposes Online method for replenishing gas of electric equipment, comprises the following steps:

[0029] S1. Install the air supply tank 1, and connect the air supply tank 1 with the SF6 electrical equipment through the connecting hose 2. There is a solenoid valve 3 between the connecting hose 2 and the SF6 electrical equipment, and the connecting hose 2 and the air supply tank 1 A suction pump 4 is arranged between them, and a vacuum pump 5 is also connected between the solenoid valve 3 and the suction pump 4 on the connecting hose 2 . In this way, in this embodiment, the SF6 electrical equipment can be automatically replenished with air through the suction pump 4 and the air supply tank 1 .

[0030] S2. Detect the pressure inside the SF6 electrical equipment in real time, and judge whether the SF6 electrical equipment is leaking according to the pressure. Specifically, in this step, the detected pressure ...

Embodiment 2

[0037] In this embodiment, step S2 in Embodiment 1 is divided into the following steps.

[0038] S21. Detect the pressure inside the SF6 electrical equipment in real time, and compare the detected pressure value with a preset pressure threshold.

[0039] S22. When the pressure detection value is less than the pressure threshold, it is judged whether the pressure inside the SF6 electrical equipment presents a decreasing trend. If yes, it is judged that the SF6 electrical equipment is leaking. If not, return to step S21. Specifically, in this step, it is judged whether the pressure inside the SF6 electrical equipment is decreasing according to the change trend of the pressure detection value in the SF6 electrical equipment.

[0040] In this way, in this embodiment, in combination with the comparison result of the current pressure detection value and the pressure threshold value and the pressure change trend of the SF6 electrical equipment to determine whether the SF6 electrica...

Embodiment 3

[0043] This embodiment is technically long in Embodiment 2, and step S4 specifically includes the following steps:

[0044] S41. Calculate the leakage flow rate of the SF6 electrical equipment according to the latest N pressure detection values ​​and the gas volume in the SF6 electrical equipment. Specifically, in this step, the latest N pressure detection values ​​are updated in real time, and the leakage flow rate is updated along with the update of the N pressure detection values.

[0045] S42. Adjust the working state of the suction pump 4, and supply air to the SF6 electrical equipment at the same flow rate as the leaked gas.

[0046] In this way, in the present embodiment, gas supplementation is carried out according to the leakage flow rate. On the one hand, it can ensure that the insulating gas pressure in the SF6 electrical equipment is maintained at a safe and stable level; The incoming leakage flow rate is increased, thereby avoiding the excessive waste of insulati...

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Abstract

The invention provides an online air supply method of SF6 electric equipment. The method comprises the following steps: (S1) an air supply tank is mounted, and is connected with the SF6 electric equipment through a connecting hose; an electromagnetic valve is arranged between the connecting hose and the SF6 electric equipment; a suction pump is arranged between the connecting hose and the air supply tank; and the connecting hose is connected with a vacuum pump between the electromagnetic valve and the suction pump; (S2) the pressure in the SF6 electric equipment is detected in real time; and the air leakage of the SF6 electric equipment is judged according to the pressure; (S3) when the SF6 electric equipment leaks air, the vacuum pump is started to vacuumize the connecting hose; and (S4)the vacuum pump is stopped; and the electromagnetic valve, the suction pump and the air supply tank are started to supply the air to the SF6 electric equipment. On the one hand, the air supply intelligence and automation of the SF6 electric equipment are achieved, the delay problem in manual air supply is solved, and the reduction of manpower demands is facilitated; and on the other hand, the aircan be supplied to the SF6 electric equipment online, so that the electric safety problem of the SF6 electric equipment incapable of timely stopping working is solved.

Description

technical field [0001] The invention relates to the technical field of SF6 electrical equipment, in particular to an online air supply method for SF6 electrical equipment. Background technique [0002] For SF6 electrical equipment, the density value of SF6 gas is related to the insulation or arc extinguishing performance of SF6 electrical equipment. Therefore, the horizontal processing of the density value of SF6 gas is of great significance to the insulation or arc extinguishing performance of SF6 electrical equipment. At present, many substations are unattended. Once SF6 electrical equipment leaks, it must be repaired manually. The manpower demand is high, the cost is high, and it is difficult to guarantee the timeliness of maintenance. Second, many substations have many power supply nodes and cannot be repaired at any time. In case of power failure, at this time, even if the SF6 electrical equipment leaks, it must continue to work, and it is difficult to ensure electrica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/00F17C5/06F17C13/02
CPCF17C5/06F17C13/025F17C2201/0119F17C2201/035F17C2201/056F17C2221/01F17C2223/0123F17C2225/0123F17C2227/0135F17C2250/043F17C2250/072F17C2270/05
Inventor 章海斌吴胜蒲道杰杨波尹峰邱曼曼王雄奇苏艳菊余芳吴永恒张杰王安东夏铁新郭正操
Owner STATE GRID ANHUI ULTRA HIGH VOLTAGE CO
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