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Gas density relay with on-line self-calibration function and calibration method thereof

A technology of gas density and relay, applied in the field of electric power, can solve the problems of lowering of insulation strength, flashover, damage and other problems on the surface of insulating parts

Pending Publication Date: 2019-11-26
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
The entire calibration process requires environmental protection and safety

Method used

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  • Gas density relay with on-line self-calibration function and calibration method thereof
  • Gas density relay with on-line self-calibration function and calibration method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] figure 1 It is a schematic structural diagram of a gas density relay with an on-line calibration function used for high and medium voltage electrical equipment in Embodiment 1 of the present application.

[0119] like figure 1 As shown, a gas density relay with an online verification function includes a gas density relay body 1, and the gas density relay body 1 includes: a housing, and a base, an end seat, and a pressure detector arranged in the housing , temperature compensation components, several signal generators, movement, pointer, dial. One end of the pressure detector is fixed on the base and communicated with it, the other end of the pressure detector is connected to one end of the temperature compensation element through the end seat, and the other end of the temperature compensation element One end is provided with a crossbeam, and the crossbeam is provided with an adjustment piece for pushing the signal generator and making the contacts of the signal genera...

Embodiment 2

[0140] like figure 2 As shown, a gas density relay or a gas density monitoring device with an online self-checking function provided by Embodiment 2 of the present invention includes: a gas density relay body 1 (the gas density relay body 1 mainly also includes: a housing, and a device base, pressure detector, temperature compensation element, movement, pointer, dial, end seat, several signal generators and electrical equipment connection joints), pressure sensor 2, temperature sensor 3, normally open valve in the housing 4. Normally closed valve 51, air chamber 57, heating element 58, flow controller B 512, flow controller A 12, online verification contact signal sampling unit 6, intelligent control unit 7, multi-way joint 9 and air supply interface 10 . In this embodiment, an air supply interface 10 and a multi-way joint 9 are added. One end of the normally open valve 4 is connected with electrical equipment, and the other end is connected with the flow controller A12, an...

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Abstract

The invention provides a gas density relay with an online self-calibration function and a calibration method thereof, which are applied to high-voltage and medium-voltage electrical equipment. The gasdensity relay with the online self-calibration function comprises a gas density relay body, a gas density detection sensor, a normally-open valve, a normally-closed valve, an air chamber, an online calibration contact signal sampling unit and an intelligent control unit. Rise and fall of gas pressure are realized through the normally-open valve, the normally-closed valve and the air chamber, andthe gas density relay body is allowed to perform contact signal action; the contact signal action is transmitted to the intelligent control unit through the online calibration contact signal samplingunit; and the intelligent control unit detects an alarm and / or latching contact signal action value and / or a return value of the gas density relay body according to the density value obtained during the contact signal action, and calibration of the gas density relay can be completed without maintenance personnel going on site, thereby realizing maintenance-free, greatly improving reliability of apower grid, improving efficiency and reducing cost. Meanwhile, in the whole calibration process, zero emissions of gas, environmental protection, safety and economy are achieved.

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] 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 de...

Claims

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Application Information

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IPC IPC(8): G01N9/26G01D21/02G01R31/327H01H35/26
CPCG01N9/266G01D21/02G01R31/3271G01R31/3275H01H35/26
Inventor 金海生廖海明蒲东海常敏曾伟贺兵沈德茂
Owner SHANGHAI ROYE ELECTRICAL CO LTD
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