Digital gas density relay with self-diagnosis function and self-diagnosis method of relay

A technology of gas density and self-diagnosis, applied in the power field, can solve problems such as hidden dangers in safe operation and affecting electrical performance of equipment

Pending Publication Date: 2020-08-07
SHANGHAI ROYE ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most high-voltage electrical equipment is SF6 gas-insulated equipment. If the gas density decreases (such as caused by leakage, etc.), it will seriously affect the electrical performance of the equipment and cause serious hidden dangers to safe operation.

Method used

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  • Digital gas density relay with self-diagnosis function and self-diagnosis method of relay
  • Digital gas density relay with self-diagnosis function and self-diagnosis method of relay
  • Digital gas density relay with self-diagnosis function and self-diagnosis method of relay

Examples

Experimental program
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Effect test

Embodiment 1

[0105] figure 1 It is a schematic diagram of the circuit principle of a digital gas density relay with self-diagnosis function for high and medium voltage electrical equipment in the first embodiment of the present invention, figure 2 It is a schematic diagram of the gas circuit structure of a digital gas density relay or gas density monitoring device with self-diagnosis function for high and medium voltage electrical equipment of the first embodiment.

[0106] Such as figure 1 with figure 2 As shown, a digital gas density relay or gas density monitoring device with self-diagnosis function includes: a digital gas density relay housing 14, a gas density detection sensor 1, an intelligent control unit 2, a communication module 3, and a display unit 4 , Annunciator 5, temperature control unit 7, protection circuit (surge protection circuit 801, filter circuit 802, short circuit protection circuit 803), short circuit and / or open circuit diagnostic circuit 9, normally open electronic ...

Embodiment 2

[0122] image 3 It is a schematic diagram of the circuit principle of a digital gas density relay or gas density monitoring device with self-diagnosis function for high and medium voltage electrical equipment of the second embodiment; Figure 4 It is a schematic diagram of the gas circuit structure of a digital gas density relay or gas density monitoring device with self-diagnosis function for high and medium voltage electrical equipment of the second embodiment.

[0123] Such as image 3 with Figure 4 As shown, the difference from the first embodiment is that in this embodiment, a comparison sensor 6 is further included, and the comparison sensor 6 includes a second pressure sensor 601. On the gas path, the pressure sensor 101 of the gas density detection sensor 1 and the second pressure sensor 601 of the comparison sensor 6 are respectively connected to the multi-way connector 11. The normally open electronic control valve 10 is configured to shut off the gas density detection ...

Embodiment 3

[0132] Such as Figure 5 The difference from the second embodiment is that in this embodiment, the comparison sensor 6 includes a second pressure sensor 601 and a second temperature sensor 602. On the gas path, the pressure sensor 101 of the gas density detection sensor 1 and the second pressure sensor 601 of the comparison sensor 6 are respectively connected to the multi-way connector 11.

[0133] Specifically, the pressure value collected by the pressure sensor 101 of the gas density detection sensor 1 is the first pressure value P1, and the temperature value collected by the temperature sensor 102 is the first temperature value T1; compare the pressure value collected by the second pressure sensor 601 of the sensor 6 The pressure value is the second pressure value P2, and the temperature value collected by the second temperature sensor 602 is the second temperature value T2. Or, the gas density value collected by the gas density detection sensor 1 is the first density value P1...

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Abstract

The invention discloses a digital gas density relay with a self-diagnosis function and a self-diagnosis method of the relay. The digital gas density relay comprises a gas density detection sensor, anintelligent control unit, an annunciator, a communication module, a normally open electric control valve and a normally closed electric control valve; one end of the normally open electric control valve is provided with an interface communicated with electrical equipment, the other end of the normally open electric control valve is communicated with one end of the normally closed electric controlvalve, the other end of the normally closed electric control valve is communicated with air, and the gas density detection sensor is arranged on a gas path between the normally open electric control valve and the normally closed electric control valve; the intelligent control unit is connected with the gas density detection sensor, the annunciator, the communication module, the normally open electric control valve and the normally closed electric control valve to complete on-line monitoring of the gas density value of the electrical equipment and control the annunciator to control switching ofthe on-off states of the normally-open electric control valve and the normally-closed electric control valve. The gas density of the gas-insulated or arc-extinguished electrical equipment is monitored, meanwhile, online self-inspection or self-diagnosis is completed, maintenance is not needed, the operation and maintenance cost is reduced, and safe operation of a power grid is guaranteed.

Description

Technical field [0001] The invention relates to the field of electric power technology, in particular to a digital gas density relay with self-diagnosis function applied to high-voltage and medium-voltage electrical equipment and a self-diagnosis method thereof. Background technique [0002] With the development of unattended substations in the direction of networking and digitization, and the increasing requirements for remote control and remote measurement, the online monitoring of the gas density and moisture content of SF6 electrical equipment has important practical significance. With the continuous development of China's smart grid, smart high-voltage electrical equipment, as an important part and key node of smart substations, plays a pivotal role in the security of smart grids. High-voltage electrical equipment is currently mostly SF6 gas insulated equipment. If the gas density is reduced (caused by leakage, etc.), it will seriously affect the electrical performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H35/26G01N9/00G01R31/327
CPCG01N9/00G01R31/327H01H35/26
Inventor 金海勇
Owner SHANGHAI ROYE ELECTRICAL CO LTD
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