CN214749561U

CN214749561U - SF (sulfur hexafluoride)6Density integrated monitoring device

Info

Publication number: CN214749561U
Application number: CN202022933038.8U
Authority: CN
Inventors: 马文长; 何宁辉; 陈巳阳; 钟丹田; 刘博�; 陆颖杰; 李桐; 常鹏; 尚彦军; 陈晨; 黄超; 柴毅; 张源; 成诚; 王涛; 马磊; 高琳卉; 王缠斌; 夏文翔
Original assignee: Shenyang Institute of Engineering; State Grid Ningxia Electric Power Co Ltd; Electric Power Research Institute of State Grid Ningxia Electric Power Co Ltd
Current assignee: Shenyang Institute of Engineering; State Grid Ningxia Electric Power Co Ltd; Electric Power Research Institute of State Grid Ningxia Electric Power Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-11-16
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a SF₆Density integration monitoring devices includes: the temperature transmitter is connected with the circuit box; the outer surface of the circuit box is provided with a density instrument panel, the internal circuit module is positioned in the circuit box, the first end of the tee joint is communicated with an air inlet hole of the GIS equipment, a valve is arranged between the first end of the tee joint and the air inlet hole of the GIS equipment, and the testing end of the pressure transmitter is arranged on a pipeline at the second end of the tee jointThe testing end of the temperature transmitter is arranged in a pipeline at the third end of the tee joint; the internal circuit module includes: the device comprises an analog-digital sampling unit, a central processing unit, a clock unit, a storage unit and a communication unit, wherein the analog-digital sampling unit is electrically connected with a pressure transmitter, a temperature transmitter and the central processing unit respectively, and the central processing unit is also electrically connected with a density instrument panel, the clock unit, the storage unit and the communication unit. The utility model discloses an integrated device can realize traditional function and digital accurate measurement.

Description

SF (sulfur hexafluoride)6Density integrated monitoring device

Technical Field

The utility model relates to an SF₆The technical field of electrical equipment, in particular to SF₆Density integration monitoring devices.

Background

SF₆The reliability of the electrical equipment which is installed and used in a large number in each voltage class transformer substation has important significance for the safe operation of the power system. SF₆Normal operation of the electrical equipment requires that its internal SF6 gas pressure be maintained slightly above nominal if SF₆The gas pressure is too high, which brings about the test on the sealing performance of the equipment, if SF is caused by the manufacturing reason of the equipment or other defects₆Gas leakage, low pressure, no guarantee of equipment insulation and breaker on-off. Therefore, it is necessary to use SF₆The density relay monitors the gas pressure in the electrical equipment in real time to ensure SF₆The gas pressure is in a normal range, and the pressure relief or air supplement operation is carried out according to the pressure value.

Currently SF₆The on-line monitoring device of the gas density mostly uses an independent sensor and an electronic circuit, and is similar to the traditional SF₆The density relay is separately installed, so that the problem that the displayed numerical value of a mechanical meter and the data of an online monitoring device are not uniform frequently occurs.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a SF₆A density integrated monitoring device aims to solve the problem that the displayed numerical value of a mechanical meter and the data of an online monitoring device in the prior art are not uniform.

The embodiment of the utility model discloses following technical scheme:

SF (sulfur hexafluoride)₆Density integrated monitoring device for GIS equipment, SF₆The integrated monitoring device of density includes: the temperature transmitter is connected with the circuit box; a density instrument panel is mounted on the outer surface of the circuit box, the internal circuit module is located in the circuit box, the first end of the tee joint is communicated with an air inlet hole of the GIS device, a valve is arranged between the first end of the tee joint and the air inlet hole of the GIS device, the testing end of the pressure transmitter is arranged in a pipeline at the second end of the tee joint, and the testing end of the temperature transmitter is arranged in a pipeline at the third end of the tee joint; the internal circuit module includes: the device comprises an analog-digital sampling unit, a central processing unit, a clock unit, a storage unit and a communication unit, wherein the analog-digital sampling unit is respectively electrically connected with the pressure transmitter, the temperature transmitter and the central processing unit, and the central processing unit is also electrically connected with a density instrument panel, the clock unit, the storage unit and the communication unit.

Further: the valve and the first end of the tee joint, and the valve and the air inlet hole of the GIS equipment are connected through flanges.

Further: and the testing end of the pressure transmitter is fixed in a pipeline at the second end of the tee joint through threads.

Further: and the testing end of the temperature transmitter is fixed in a pipeline at the third end of the tee joint through threads.

Therefore, the embodiment of the utility model provides a, show mechanical type, the electronic measurement technique, the signal processing technique, the device that fuses as an organic whole such as thing networking communication technology makes it can possess traditional density relay's function and outward appearance, also can realize digital accurate measurement, and the panel board shows that numerical value and actual measurement match.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 shows SF according to an embodiment of the present invention₆The structure schematic diagram I of the density integrated monitoring device is shown;

FIG. 2 shows SF according to an embodiment of the present invention₆A structural schematic diagram II of the density integrated monitoring device;

FIG. 3 shows an SF according to an embodiment of the present invention₆And the structural block diagram of the circuit structure of the density integrated monitoring device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model discloses SF₆Density integration monitoring devices. The monitoring device is used for GIS equipment. The GIS equipment consists of a breaker, a disconnecting switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, all of which are sealed in a metal grounded shell, and SF with certain pressure is filled in the metal grounded shell₆Insulating gas, hence the name SF₆A totally-enclosed combined electrical apparatus.

SF as shown in FIGS. 1 to 3₆The integrated monitoring device of density includes: circuit box 1, pressure transmitter 2, temperature transmitter 3, tee joint 4 and insideAnd a circuit module.

The outer surface of the circuit box 1 is provided with a density instrument panel 5. The circuit box 1 has an IP67 class housing. The internal circuit module is located inside the circuit box 1. The first end of tee bend 4 intercommunication GIS equipment 6 inlet port. And a valve 7 is arranged between the first end of the tee joint 4 and the air inlet of the GIS equipment 6. And the valve 7 is connected with the first end of the tee joint 4 and the air inlet hole of the GIS equipment 6 through flanges. The testing end of the pressure transmitter 2 is arranged in the pipe of the second end of the tee 4. Specifically, the testing end of the pressure transmitter 2 is fixed in the pipeline at the second end of the tee joint 4 through threads. The pressure transmitter 2 is a piezoresistive sensor, which is made by using the piezoresistive effect of a solid, and when a piezoresistive material receives an acting force, the resistance or the resistivity of the piezoresistive material changes obviously. The internal resistance of the piezoresistive sensor is a diffusion resistance made by an integrated circuit process on a substrate made of semiconductor material silicon, when the piezoresistive sensor is placed in a pressure air chamber, air pressure enters a pressure chamber through a sensor hole, the resistance value of the diffusion resistance is changed under the action of piezoresistive effect, and under the condition that an excitation power supply supplies power for constant voltage, an output electromotive force proportional to input pressure is generated, so that the corresponding relation with the pressure value is obtained. The testing end of the temperature transmitter 3 is arranged in the pipeline at the third end of the tee joint 4. Specifically, the testing end of the temperature transmitter 3 is fixed in the pipeline at the third end of the tee joint 4 through threads. The temperature transmitter 3 usually selects a platinum resistor PT-100 for temperature acquisition, and the principle is as follows: when the temperature changes, the resistance value of the metal platinum resistor changes, which causes the change of electric quantity, forms the thermal resistance bridge temperature measurement principle, and forms the proportional relation between the electric signal and the temperature change.

The internal circuit module includes: the system comprises an analog-digital sampling unit 8, a central processing unit 9, a clock unit 10, a storage unit 11 and a communication unit 12. The analog-digital sampling unit 8 is electrically connected with the pressure transmitter 2, the temperature transmitter 3 and the central processor 9 respectively. The central processor 9 is also electrically connected with a density instrument panel 5, a clock unit 10, a storage unit 11 and a communication unit 12.

Specifically, the pressure transmitter 2 is used for detecting the pressure inside the GIS equipment 6 and sending the pressure to the analog-digital samplingAnd (8) a unit. The temperature transmitter 3 is used for detecting the temperature inside the GIS device 6 and sending the temperature to the analog-digital sampling unit 8. The analog-to-digital sampling unit 8 is configured to perform analog-to-digital conversion on the received pressure and temperature, and send the converted pressure and temperature to the central processing unit 9. The CPU 9 is used for calculating SF according to the pressure and the temperature by adopting the existing empirical formula₆Density. Wherein the empirical formula is a Beattie-Bridgman empirical formula. This calculation method is a known calculation method.

The density dashboard 5 may be used to display the measurements sent by the central processor 9. The density gauge panel 5 may be needle-type.

The communication unit 12 is used for receiving the measurement result of the central processing unit 9 and sending the measurement result to other external devices. The communication unit 12 may employ an RS-485 communication interface, which conforms to the intra-substation interface specification of the intelligent substation.

The clock unit 10 is used to record the time of sampling and the time of occurrence of the malfunction alarm, and is stored in the storage unit 11.

The memory unit 11 may also be used to store the measurement results of the central processor.

To sum up, the embodiment of the utility model provides a, show mechanical type, the electronic measurement technique, the signal processing technique, the device that integrates such as thing networking communication technology makes it can possess traditional density relay's function and outward appearance, also can realize digital accurate measurement, and the panel board shows that numerical value and actual measurement match.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. SF (sulfur hexafluoride)₆Density integrated monitoring device for GIS equipment, characterized in that SF₆The integrated monitoring device of density includes: a circuit box,The temperature transmitter is connected with the pressure transmitter through the tee joint;

a density instrument panel is mounted on the outer surface of the circuit box, the internal circuit module is located in the circuit box, the first end of the tee joint is communicated with an air inlet hole of the GIS device, a valve is arranged between the first end of the tee joint and the air inlet hole of the GIS device, the testing end of the pressure transmitter is arranged in a pipeline at the second end of the tee joint, and the testing end of the temperature transmitter is arranged in a pipeline at the third end of the tee joint;

the internal circuit module includes: the device comprises an analog-digital sampling unit, a central processing unit, a clock unit, a storage unit and a communication unit, wherein the analog-digital sampling unit is respectively electrically connected with the pressure transmitter, the temperature transmitter and the central processing unit, and the central processing unit is also electrically connected with a density instrument panel, the clock unit, the storage unit and the communication unit.

2. SF according to claim 1₆Density integration monitoring devices, its characterized in that: the valve and the first end of the tee joint, and the valve and the air inlet hole of the GIS equipment are connected through flanges.

3. SF according to claim 1₆Density integration monitoring devices, its characterized in that: and the testing end of the pressure transmitter is fixed in a pipeline at the second end of the tee joint through threads.

4. SF according to claim 1₆Density integration monitoring devices, its characterized in that: and the testing end of the temperature transmitter is fixed in a pipeline at the third end of the tee joint through threads.