Gas density relay with online self-checking function and checking method thereof

A technology of gas density and relay, applied in the field of electric power, can solve problems such as potential safety hazards

Pending Publication Date: 2020-07-24
SHANGHAI ROYE ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, power supply companies, power plants, and large-scale factories and mines need to be equipped with testers, equipment vehicles, and high-value SF6 gas in order to complete the on-site calibration and testing of gas density relays. The annual inspection cost of the high-voltage switch station is about tens of thousands to hundreds of thousands of yuan. In addition, if the on-site inspection of the inspection personnel is not performed in a standardized manner, there are still potential safety hazards

Method used

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  • Gas density relay with online self-checking function and checking method thereof
  • Gas density relay with online self-checking function and checking method thereof
  • Gas density relay with online self-checking function and checking method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] like figure 1 As shown, the first embodiment of the present invention provides a gas density relay or a gas density monitoring device with an online self-verification function, including: a gas density relay body 1, a gas density detection sensor (pressure sensor 2, temperature sensor 3), Check valve 4, pressure regulating mechanism 5, online verification contact signal sampling unit 6 and intelligent control unit 7. The air inlet 4B of the check valve 4 is connected with the electrical equipment 8 through a sealing ring 406, or the air inlet 4B of the check valve 4 is connected with the electrical equipment 8 through a multi-way joint; the air outlet 4A of the check valve 4 It is connected with the second interface 507 of the pressure regulating mechanism 5 through the sealing rings 407 and 5M. The gas density relay body 1 is arranged on the first interface 506 of the pressure regulating mechanism 5, the pressure sensor 2, the temperature sensor 3 and the intelligent ...

Embodiment 2

[0131] like Figure 4 ~ Figure 5 As shown, a gas density relay or a gas density monitoring device with an online self-verification function provided by Embodiment 2 of the present invention includes: a gas density relay body 1, a gas density detection sensor (pressure sensor 2, temperature sensor 3), Check valve 4 , pressure regulating mechanism 5 , on-line verification contact signal sampling unit 6 , intelligent control unit 7 , multi-way joint 9 and air supply joint 10 . The pressure sensor 2 , temperature sensor 3 , on-line verification contact signal sampling unit 6 and intelligent control unit 7 are arranged on the gas density relay body 1 . The pressure regulating mechanism 5 is installed on the multi-way joint 9 through the check valve 4 , and the air supply joint 10 is arranged on the multi-way joint 9 .

[0132] The difference between this embodiment and embodiment one is:

[0133] The driving part of the pressure regulating mechanism 5 of this embodiment is compos...

Embodiment 3

[0138] like Figure 6 ~ Figure 7 As shown, a gas density relay or a gas density monitoring device with an online self-verification function provided by Embodiment 3 of the present invention includes: a gas density relay body 1, a gas density detection sensor (pressure sensor 2, temperature sensor 3), Check valve 4, pressure regulating mechanism 5, online verification contact signal sampling unit 6 and intelligent control unit 7. The pressure sensor 2 , temperature sensor 3 , on-line verification contact signal sampling unit 6 and intelligent control unit 7 are arranged on the gas density relay body 1 .

[0139] The difference between this embodiment and embodiment one is:

[0140] The connecting part 504, the driving part 505, and the sealing part coupling part 508 of this embodiment are all sealed and arranged inside the cavity (or housing) 512 to further improve the sealing performance and ensure the safe operation of the power grid. In addition, the piston 502 can be dire...

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PUM

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Abstract

The invention provides a gas density relay with an online self-checking function and a checking method thereof. The gas density relay comprises a gas density relay body, a gas density detection sensor, a check valve, a pressure adjusting mechanism, an online checking contact signal sampling unit and an intelligent control unit. A moving part of the pressure adjusting mechanism is driven by a driving part to move so that the check valve is closed; a volume of an air chamber of the pressure regulating mechanism changes along with movement of the moving part; pressure of the gas density relay body is adjusted to rise and fall; the gas density relay body is subjected to contact action; the contact action is transmitted to the intelligent control unit through the online checking contact signalsampling unit; and the intelligent control unit detects a contact signal action value according to a density value during contact action. Verification can be completed without the need for maintainersto go to the site, reliability and efficiency of a power grid are improved, cost is reduced, and particularly, the check valve is adopted to close a gas circuit so that during operation and verification, sealing performance is better, a size is smaller, reliability is higher, and a service life is longer.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a gas density relay with an online self-checking function and a checking method thereof, which is applied to high-voltage and medium-voltage electrical equipment. Background technique [0002] The role of SF6 gas in high-voltage electrical equipment is arc extinguishing and insulation. If the density of SF6 gas in high-voltage electrical equipment decreases and the micro-water content exceeds the standard, it will seriously affect the safe operation of SF6 high-voltage electrical equipment: the density of SF6 gas will decrease to a certain level. Loss of insulation and arc extinguishing properties. [0003] With the continuous vigorous development of China's smart grid, intelligent high-voltage electrical equipment, as an important part and key node of the smart substation, plays a pivotal role in the security of the smart grid. At present, most high-voltage electrical e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H35/32H01H35/38H01H35/26G01N9/00G01R31/327
CPCG01N9/00G01R31/327H01H35/26H01H35/32H01H35/38
Inventor 常敏黄小泵夏铁新郭正操金海勇
Owner SHANGHAI ROYE ELECTRICAL CO LTD
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