Online sampling and verifying gas density relay with protection function

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

Pending Publication Date: 2019-11-08
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 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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  • Online sampling and verifying gas density relay with protection function
  • Online sampling and verifying gas density relay with protection function
  • Online sampling and verifying gas density relay with protection function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0178] figure 1 It is a schematic diagram of a control circuit of an on-line sampling and verification gas density relay with protection function of the high-voltage electrical equipment in Embodiment 1 of the present invention. Such as figure 1 As shown, an on-line sampling and verification gas density relay with protection function includes: gas density relay body 1, pressure sensor 2, temperature sensor 3, valve 4, temperature adjustment mechanism 5, on-line verification contact signal sampling unit 6, Intelligent control unit 7 and pressure regulating mechanism 8. One end of the valve 4 is provided with an interface connected with electrical equipment, and the other end of the valve 4 is connected with the gas density relay body 1; the temperature adjustment mechanism 5 is arranged opposite to the gas density relay 1, and the temperature sensor 3 is arranged in the housing of the density relay 1 . Specifically, the temperature adjusting mechanism 5 is arranged outside t...

Embodiment 2

[0188] Such as figure 2 As shown, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit. In this embodiment, the contact sampling circuit includes a photocoupler OC1 and a resistor R1, the photocoupler OC1 includes a light emitting diode and a phototransistor; the anode of the light emitting diode and the gas density relay body 1 Contact P J Form a closed loop in series; the emitter of the phototransistor is grounded; the collector of the phototransistor is connected to the intelligent control unit 7 as the output terminal out6 of the online verification contact signal sampling unit 6, and the collection of the phototransistor The electrodes are also connected to the power supply through the resistor R1.

[0189] Through the above contact sampling circuit, it is convenient to know the contact P of the gas density relay body 1 J is open or closed. Specifically, when the joint P J When closed, the closed circuit is energized, th...

Embodiment 3

[0193] Such as image 3 As shown, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit. In this embodiment, the contact sampling circuit includes a first optocoupler OC1 and a second optocoupler OC2.

[0194] The light-emitting diodes of the first photocoupler OC1 and the light-emitting diodes of the second photocoupler OC2 are respectively connected in parallel through current-limiting resistors, and after being connected in parallel, they are connected in series with the contacts of the gas density relay body to form a closed loop, and the first The connection direction of the light-emitting diode of a photocoupler OC1 and the second photocoupler OC2 is opposite; the collector of the phototransistor of the first photocoupler OC1 and the collector of the phototransistor of the second photocoupler OC2 The electrodes are all connected to the power supply through a voltage dividing resistor, and the emitter of the phototransistor of ...

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PUM

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Abstract

The invention provides an online sampling and verifying gas density relay with a protection function. The online sampling and verifying gas density relay comprises a gas density relay body, a gas density detecting sensor, a temperature adjusting mechanism, an online verifying contact signal sampling unit and an intelligent control unit. The online verifying contact signal sampling unit comprises afirst connecting circuit and a second connecting circuit. The first connecting circuit is connected with a contact of the gas density relay body and a contact signal control circuit. The second connecting circuit is connected with the contact of the gas density relay body and the intelligent control unit. In the non-verification state, the second connecting circuit is switched off, and the firstconnecting circuit is switched on; in the verification state, the first connecting circuit is switched off, the second connecting circuit is switched on, and the contact of the gas density relay bodyis connected with the intelligent control unit; it is ensured that action signals of the contact are not uploaded during verification and the safety operation of a power grid is not affected; meanwhile, the gas density relay is free of maintenance, benefits are greatly improved, and the reliable and safe operation of the power grid is improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an on-line sampling and checking gas density relay with protection function, which is applied to high-voltage and medium-voltage electrical equipment. Background technique [0002] The gas density relay is generally used to monitor and control the density of insulating gas in high-voltage electrical equipment. It has a contact signal control circuit inside. The gas circuit of the gas density relay is connected to the gas chamber of the high-voltage electrical equipment. When a gas leak is detected, The contact action of the gas density relay generates a contact signal, and the contact signal control circuit sends an alarm or locks according to the contact signal, so as to realize the safe operation protection of electrical equipment. [0003] Currently, SF 6 (Sulfur hexafluoride) electrical equipment has been widely used in the power sector, industrial and mining enterpr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00G01D21/02G01R31/327G05B19/042H01H35/26H01H35/28H01H35/30
CPCG01D21/02G01N9/00G01R31/327G05B19/042H01H35/26H01H35/28H01H35/30
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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