Maintenance-free gas density relay

A technology of gas density and relay, applied in the field of electric power, can solve problems such as the reduction of insulation strength on the surface of insulating parts, flashover, and hazards

Active Publication Date: 2020-07-28
SHANGHAI ROYE ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3) When the temperature drops, too much moisture may form condensation water, which will significantly reduce the insulation strength of the surface of the insulating part, or even flashover, causing serious damage
In addition, if the gas density on-line monitoring device or the remote density relay is calibrated or inspected, a lot of manpower and material resources are required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151] figure 1 It is a schematic structural diagram of a maintenance-free gas density relay for high and medium voltage electrical equipment in an embodiment of the present invention, as figure 1 As shown, a maintenance-free gas density relay or gas density monitoring device mainly includes: a gas density relay body 1, a gas density detection sensor (pressure sensor 2, temperature sensor 3) and an intelligent control unit 7; on the gas circuit, the The pressure sensor 2 of the gas density detection sensor communicates with the gas density relay body 1 . It also includes a mutual self-calibration unit, through which the intelligent control unit 7 compares the data detected by the mutual self-calibration unit to realize maintenance-free; or, through the intelligent control unit 7 and the mutual self-calibration unit, compares the detected data to realize free maintain.

[0152] In this embodiment, the mutual self-calibration unit is composed of the pressure sensor 2 and the o...

Embodiment 2

[0157] figure 2 It is a schematic diagram of the front structure of the maintenance-free gas density relay used for high-voltage electrical equipment in Embodiment 2 of the present invention, as figure 2 As shown, the difference from the first embodiment is that the output signal of the comparison density value is output in this embodiment. When the gas density relay is provided with a comparison density value output signal, it is also possible to use the temperature difference between the density relay and the electrical equipment to cause the density value of the gas density relay to change (or use the temperature adjustment mechanism to adjust the density caused by the temperature compensation element. The density value of the relay changes; or when the gas path is closed, the pressure adjustment mechanism adjusts the pressure to cause the density change), the intelligent control unit 7 of the electronic part of the gas density relay collects the gas density value in real...

Embodiment 3

[0159] image 3 It is a schematic structural diagram of a maintenance-free gas density relay or a gas density monitoring device for high-voltage electrical equipment in Embodiment 3 of the present invention, as image 3 As shown, the maintenance-free gas density relay or gas density monitoring device of the third embodiment of the present invention includes: a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjustment mechanism 5, and an online calibration contact signal Sampling unit 6, intelligent control unit 7, multi-way connector 9. One end of the valve 4 is connected with the equipment connection joint, and the other end of the valve 4 is connected with the multi-way joint 9 . The gas density relay body 1, the pressure sensor 2, the temperature sensor 3, the online verification contact signal sampling unit 6, and the intelligent control unit 7 are arranged on the multi-way joint 9; The pressure regulator 5 is installed on th...

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Abstract

The invention provides a maintenance-free gas density relay, which comprises a gas density relay body and a first gas density detection sensor which are communicated on a gas path, and an intelligentcontrol unit connected with the gas density relay body and the first gas density detection sensor respectively, wherein the intelligent control unit compares and verifies a first pressure value and asecond pressure value acquired under the same gas pressure, and / or compares and verifies a first temperature value and a second temperature value acquired under the same gas temperature, or compares and verifies a first density value and a second density value acquired under the same gas density, the intelligent control unit can also upload the received data to a background, and the background carries out data comparison. According to the invention, the gas density relay is used for monitoring the gas density of gas-insulated or arc-extinguished electrical equipment and completing online self-checking or mutual checking of the gas density relay at the same time, improves the efficiency, is free of maintenance, reduces the cost, and ensures the safe operation of a power grid.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a maintenance-free gas density relay applied to high-voltage and medium-voltage electrical equipment. Background technique [0002] At present, SF6 (sulfur hexafluoride) electrical equipment has been widely used in the power sector and industrial and mining enterprises, which has promoted the rapid development of the power industry. In recent years, with the rapid economic development, the capacity of my country's power system has expanded rapidly, and the amount of SF6 electrical equipment has increased. 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: 1) The density of SF6 gas is reduced to a certain extent. Will result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H35/26G01N9/26G01K15/00G01L27/00
CPCH01H35/26G01N9/26G01K15/00G01L27/00G01L7/041G01L7/043H01H2300/052H01H35/28H01H33/563H01H2300/02H02B13/065
Inventor 金海勇夏铁新黄小泵郭正操常敏王乐乐
Owner SHANGHAI ROYE ELECTRICAL CO LTD
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