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On-line calibration method of field gas density relay

A technology of gas density and calibration method, applied in the field of electric power, can solve problems such as potential safety hazards, hazards, flashovers, etc.

Active Publication Date: 2019-12-10
SHANGHAI ZHUODIAN ELECTRIC
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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 on-site inspection of the inspectors is not performed in a standardized manner, there are still potential safety hazards

Method used

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  • On-line calibration method of field gas density relay
  • On-line calibration method of field gas density relay
  • On-line calibration method of field gas density relay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] Such as figure 1 As shown, Embodiment 1 of the present invention provides an on-line verification method for an on-site gas density relay. Specifically, one end of the electric control valve 4 is sealed and connected to the electrical equipment, and the other end of the electric control valve 4 is passed through The multi-way joint 9 communicates with the gas density relay body 1; the pressure sensor 2 communicates with the gas density relay body 1 on the gas path through the multi-way joint 9; the pressure adjustable mechanism 5 communicates with the gas density relay body 1 through the multi-way joint 9. The relay body 1 is connected; the online verification contact signal sampling unit 6 is respectively connected with the gas density relay body 1 and the intelligent control unit 7; the electric control valve 4, the pressure sensor 2, the temperature sensor 3 and the pressure adjustable mechanism 5 are respectively It is connected with the intelligent control unit 7; ...

Embodiment 2

[0165] Such as image 3 As shown, an on-site gas density relay calibration method provided by Embodiment 2 of the present invention includes: a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, an electric control valve 4, a pressure adjustable mechanism 5, an online Calibration contact signal sampling unit 6, intelligent control unit 7, multi-way joint 9, air supply interface 10, self-sealing valve 11. One end of the self-sealing valve 11 is sealingly connected to the electrical equipment, and the other end of the self-sealing valve 11 is in communication with the electric control valve 4; one end of the self-sealing valve 4 is sealingly connected to the self-sealing valve 11, and the electric The other end of the control valve 4 is connected with a multi-way joint 9 . The gas density relay body 1 is installed on the multi-way joint 9; the pressure sensor 2 and the temperature sensor 3 are arranged on the gas density relay body 1, and the pressure sensor...

Embodiment 3

[0168] Such as Figure 4 As shown, an on-site gas density relay calibration method provided by Embodiment 3 of the present invention includes: gas density relay body 1, pressure sensor 2, temperature sensor 3, electric electronic control valve 4, pressure adjustable mechanism 5, On-line verification contact signal sampling unit 6, intelligent control unit 7, multi-way joint 9, air supply interface 10, valve 12. One end of the valve 12 is sealingly connected to the electrical equipment, and the other end of the valve 12 is in communication with the electric control valve 4; one end of the electric control valve 4 is sealingly connected to the valve 12, and the electric control valve 4 The other end of the multi-way joint 9 is connected. The gas density relay body 1 is installed on the multi-way joint 9; the pressure sensor 2, the temperature sensor 3, the online verification contact signal sampling unit 6 and the intelligent control unit 7 are set together. The pressure adjus...

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Abstract

The invention relates to a gas density relay. The invention discloses an on-line calibration method for a field gas density relay. A pressure adjustable mechanism, an electric control valve, at leastone pressure sensor, at least one temperature sensor, at least one intelligent control unit and a contact signal sampling unit are included. The pressure adjustable mechanism is controlled through theintelligent control unit; the gas pressure of the gas density relay is increased and decreased; the gas density relay is enabled to generate contact action; the contact action is transmitted to the intelligent control unit through the contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value during the contact action or directly obtains the gas density value, the contact signal action value of the gas density relay is detected, and the verification work of the contact signal action value of the gas density relay is completed. According to the invention, gas density relays of various measurement principles can be accurately calibrated on site, the reliability is high, the cost is reduced, the economic benefit is greatly improved, and the safety and reliability of a power grid are improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an on-line calibration method for an on-site gas density relay, which is applied to high-voltage and medium-voltage electrical equipment. Background technique [0002] Currently, SF 6 (Sulfur hexafluoride) electrical equipment has been widely used in the power sector, industrial and mining enterprises, and 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 SF 6 The amount of electrical equipment is increasing. SF 6 The role of gas in high-voltage electrical equipment is arc extinguishing and insulation, and SF in high-voltage electrical equipment 6 If the density of the gas decreases and the moisture content exceeds the standard, it will seriously affect the safe operation of SF6 high-voltage electrical equipment: 1) SF 6 The reduction of gas d...

Claims

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Application Information

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IPC IPC(8): G01R31/327G01R27/02G01N9/00
CPCG01R31/3278G01R27/02G01N9/00
Inventor 苏丽芳
Owner SHANGHAI ZHUODIAN ELECTRIC
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