CN215894813U

CN215894813U - Sensor for detecting partial discharge and insulating gas of GIL

Info

Publication number: CN215894813U
Application number: CN202121323005.XU
Authority: CN
Inventors: 刘昌炎; 匡相融; 吴勇峰; 王伟
Original assignee: Jiangsu Fenggong Electrical Science & Technology Co ltd
Current assignee: Jiangsu Fenggong Electrical Science & Technology Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-02-22
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses a GIL partial discharge and insulating gas detection sensor, which comprises a GIL pipeline, wherein an opening is processed on one side surface of the GIL pipeline, a GIL sensor flange is arranged in the opening, an acoustic-electric partial discharge detection and insulating gas comprehensive detection integrated sensor is arranged on the GIL sensor flange, the acoustic-electric partial discharge detection and insulating gas comprehensive detection integrated sensor comprises an ultrahigh frequency sensor, an ultrasonic sensor, a density sensor, a micro-water sensor, a temperature sensor and a pressure sensor, and the ultrahigh frequency sensor is fixed in the middle position of a GIL sensor flange. The sensor integrates and encapsulates partial discharge detection and insulating gas detection in one sensor by using the insulating gas comprehensive detection scheme of micro water, density, pressure and temperature, adopts open-cell built-in installation, has better detection effect, and detects more real gas data.

Description

Sensor for detecting partial discharge and insulating gas of GIL

Technical Field

The utility model relates to the technical field of power detection equipment, in particular to a GIL partial discharge and insulating gas detection sensor.

Background

The gas insulated transmission line GIL is the existing transmission line equipment with the maximum transmission capacity, and is realized by injecting insulating gas into a closed pipeline. The GIL line is composed of a plurality of unit air chambers, and normal operation of power transmission is influenced when any one air chamber fails, so that the GIL line monitoring is particularly important. The existing method for detecting partial discharge faults of the GIL power transmission line comprises the following steps: 1. the method comprises the following steps of (1) an ultrasonic detection method 2, a ultrahigh frequency detection method 3, a vibration detection method and the like, wherein the ultrasonic detection method adopts an external surface-mounted installation method, and each gas type unit is provided with a plurality of ultrasonic sensors to realize partial discharge detection; the ultrahigh frequency detection method is similar to the ultrasonic detection method; the vibration detection method detects a partial discharge failure based on a vibration principle accompanying a partial discharge. The detection parameters of the insulating gas comprise: 1. SF6 gas micro water 2, SF6 gas density 3, SF6 gas pressure 4 and SF6 gas temperature, and the gas detection is that the gas is introduced into the sensor through an opening on the wall of the pipeline.

As shown in fig. 1, the ultrasonic detection method sensor, the uhf detection method sensor, the vibration detection method sensor, and the insulating gas detection sensor in the prior art are schematically installed. In the actual detection process, an ultrasonic detection method is adopted, partial discharge signal acquisition is carried out in an externally-attached pipe wall installation mode, when the partial discharge signal is not large, ultrasonic waves hardly penetrate through the pipe wall of the GIL, so that the partial discharge signal is difficult to find when the fault is small, and the outer wall installation mode is easily influenced by the environment; the ultrahigh frequency detection method adopts a built-in method, so that the collection effectiveness is ensured, but the propagation speed of electromagnetic waves is almost the light speed, and the penetrating power to a resin insulation basin is strong, so that a sensor adjacent to a partial discharge fault can also detect a fault signal, and a discharge air chamber is difficult to determine; the vibration detection method is similar to the ultrasonic detection method, and is difficult to detect signals when the partial discharge is weak and is greatly influenced by the external environment. The insulating gas detection mode is to use micro-water, density, pressure and temperature sensors for detection, the sensors are generally packaged for detection singly or in two, and a mode of introducing the sensors by opening air guide holes is adopted, as shown in figure 1, the detection has a distorted idea because the insulating gas circulates slowly in a small pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a GIL partial discharge and insulating gas detection sensor, which integrates and encapsulates partial discharge detection and insulating gas detection in one sensor by an insulating gas comprehensive detection scheme of micro water, density, pressure and temperature, adopts open-cell built-in installation, has better detection effect and more real detected gas data.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a detect sensor about GIL partial discharge and insulating gas, includes the GIL pipeline, a GIL pipeline side processing have the trompil, trompil internally mounted GIL sensor ring flange, the GIL sensor ring flange on be equipped with the sound electricity office and put detection, insulating gas integrated detection integral type sensor, sound electricity office put detection, insulating gas integrated detection integral type sensor include superfrequency sensor, ultrasonic sensor, density transducer, little water sensor, temperature sensor and pressure sensor, GIL sensor ring flange intermediate position department be fixed with superfrequency sensor, superfrequency sensor intermediate position department be connected with ultrasonic sensor, density sensor, little water sensor, temperature sensor and pressure sensor all around through ceramic fibre conduction components and parts wire, ultrasonic sensor, insulating gas integrated detection integrated type sensor, temperature sensor and pressure sensor, The density sensor, the micro-water sensor, the temperature sensor and the pressure sensor are distributed around the ultrahigh frequency sensor at intervals.

Furthermore, the integrated sensor for detecting the sound-electricity partial discharge and comprehensively detecting the insulating gas is externally packaged.

Furthermore, the integrated sensor for detecting the sound-electricity partial discharge and comprehensively detecting the insulating gas is arranged in the opening.

Furthermore, the ceramic fiber conducting component and the lead thereof are both made of ceramic fibers and high-temperature-resistant alloy materials.

Compared with the prior art, the utility model has the following beneficial effects:

the partial discharge sensor and the insulating gas detection sensor are fused, so that the number of openings of the GIL pipeline is reduced, and the power transmission safety is improved; the 360-degree omnidirectional ultrahigh-frequency antenna and the wide-angle ultrasonic sensor detect partial discharge faults at two ends of a pipeline, have high response speed and strong anti-interference of acoustoelectric combined detection; micro-water, density, pressure and temperature parameters are detected at the same point, the data authenticity is high, and the analysis of the insulating gas is more accurate; the sensor flange sealing technology ensures that the inner side of the pipeline is communicated with the atmosphere side, and meanwhile, the sealing performance is excellent under the complex environment condition.

Drawings

FIG. 1 is a schematic diagram of a GIL detection structure and installation in the prior art;

FIG. 2 is a schematic diagram of the internal structure of the integrated sensor for acoustoelectric partial discharge detection and comprehensive detection of insulating gas according to the present invention;

FIG. 3 is a schematic view of an installation structure of an integrated sensor for acoustoelectric partial discharge detection and comprehensive detection of insulating gas according to the present invention;

in the figure: 1. a GIL pipeline; 2. an ultrasonic sensor; 3. an ultrahigh frequency sensor; 4. a vibration sensor; 5. an insulating gas detection sensor; 6. an integrated sensor for sound-electricity partial discharge detection and insulating gas comprehensive detection; 7. a GIL sensor flange; 8. a ceramic fiber conductive component; 9. a pressure sensor; 10. a temperature sensor; 11. a micro-water sensor; 12. a density sensor.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the utility model easy to understand, the utility model is further explained below by combining the specific figures.

As shown in figures 1 to 3, a GIL partial discharge and insulating gas detection sensor comprises a GIL pipeline 1, a hole is processed on one side surface of the GIL pipeline 1, a GIL sensor flange 7 is installed in the hole, an integrated sensor 6 for detecting acoustic-electric partial discharge and insulating gas comprehensive detection is arranged on the GIL sensor flange 7, the integrated sensor 6 for detecting acoustic-electric partial discharge and insulating gas comprehensive detection comprises an ultrahigh frequency sensor 3, an ultrasonic sensor 2, a density sensor 12, a micro water sensor 11, a temperature sensor 10 and a pressure sensor 9, the ultrahigh frequency sensor 3 is fixed at the middle position of the flange 7 of the GIL sensor, the ultrasonic sensor 2, the density sensor 12, the micro water sensor 11, the temperature sensor 10 and the pressure sensor 9 are connected to the periphery of the middle position of the ultrahigh frequency sensor 3 through ceramic fiber conducting components 8, ultrasonic sensor 2, density sensor 12, little water sensor 11, temperature sensor 10 and pressure sensor 9 encircle the distribution around superfrequency sensor 3 at interval each other, and the detection is put in the sound electroelectricity office, and the comprehensive detection integral type sensor 6 outside is capsulated, and the detection is put in the sound electroelectricity office, and the comprehensive detection integral type sensor 6 of insulating gas is built-in inside the trompil, and ceramic fiber conduction components and parts 8 and its wire all adopt ceramic fiber and high temperature resistant alloy material processing to make.

During the in-service use, this sensor is integrated structure, by 360 omnidirectional superfrequency sensor 3, wide angle ultrasonic sensor 2, little water sensor 11, pressure sensor 9, density sensor 12 and temperature sensor 10 constitute, superfrequency sensor 3 is in the middle of the flange, other sensors distribute around

superfrequency sensor

3, 1 trompil position in a GIL pipeline possesses multinomial monitoring parameter, multifunctional sensor signal conductor adopts ceramic fibre and high temperature resistant alloy material processing to form, good physics and chemical property have, stable performance, possess outstanding sealing performance, all sensors are integrated on a flange, have fine time difference analysis and interference filtering, it is more accurate to put the detection to the air chamber office in the sensor. The better circulation of large-size sensor hole insulating gas, insulating gas detects more accurately effectively.

Fig. 3 is a schematic diagram of the installation of the sensor in the scheme, and compared with the existing detection scheme, only one hole is needed for the GIL pipe 1, so that the GIL pipe 1 is more convenient to produce and safer for high-voltage power transmission; the partial discharge detection and the air chamber positioning are more accurate; the sensor data acquisition, communication and power supply are more standard and safe.

The sensor has the advantages that: 1. the problems of poor integration sealing performance of multiple sensors and mutual interference of sensor signals are solved, the ceramic fibers and the high-temperature-resistant alloy are adopted to be made into signal conducting elements on the atmosphere side and the insulating gas side through high temperature and high pressure, the sealing effect is achieved, conducting element wires have the coaxial cable shielding effect, and crosstalk among the sensor signals is avoided. 2. The accuracy and the sensitivity of partial discharge faults are improved, a built-in sound-electricity combined detection method is adopted, the advantages and the disadvantages are complemented, and the interference of the environment to the sensor is effectively reduced in the detection in the power transmission pipeline. 3. Four functions insulating gas detect the integration, install on the multifunctional sensor of big trompil, insulating gas passes through the sensor more to accelerate, and it is truer to detect gaseous data.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A sensor for detecting partial discharge and insulating gas in a GIL, comprising: comprises a GIL pipeline, wherein an opening is processed on one side surface of the GIL pipeline, a GIL sensor flange plate is arranged in the opening, the GIL sensor flange plate is provided with an integrated sensor for sound-electricity partial discharge detection and insulating gas comprehensive detection, the integrated sensor for detecting the acoustic-electric partial discharge and the comprehensive insulating gas comprises an ultrahigh frequency sensor, an ultrasonic sensor, a density sensor, a micro water sensor, a temperature sensor and a pressure sensor, an ultrahigh frequency sensor is fixed in the middle of the flange plate flange of the GIL sensor, an ultrasonic sensor, a density sensor, a micro-water sensor, a temperature sensor and a pressure sensor are connected to the periphery of the ultrahigh frequency sensor through ceramic fiber conducting component wires, the ultrasonic sensor, the density sensor, the micro-water sensor, the temperature sensor and the pressure sensor are distributed around the ultrahigh frequency sensor at intervals.

2. The GIL partial discharge and insulating gas detecting sensor as recited in claim 1, wherein: and the outside of the integrated sensor for the sound-electricity partial discharge detection and the insulating gas comprehensive detection is packaged.

3. The GIL partial discharge and insulating gas detecting sensor as recited in claim 1, wherein: the integrated sensor for the sound-electricity partial discharge detection and the insulating gas comprehensive detection is arranged in the opening.

4. The GIL partial discharge and insulating gas detecting sensor as recited in claim 1, wherein: the ceramic fiber conducting component and the lead thereof are both made of ceramic fibers and high-temperature-resistant alloy materials.