CN115951180A - GIL partial discharge ultrasonic array detection and positioning device - Google Patents
GIL partial discharge ultrasonic array detection and positioning device Download PDFInfo
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- CN115951180A CN115951180A CN202211614559.4A CN202211614559A CN115951180A CN 115951180 A CN115951180 A CN 115951180A CN 202211614559 A CN202211614559 A CN 202211614559A CN 115951180 A CN115951180 A CN 115951180A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to the field of live-line detection and online monitoring of power equipment, in particular to a GIL partial discharge ultrasonic array mounting structure, which comprises a tank body, wherein the outer side of the tank body is connected with a fixed three-post insulator and a sliding three-post insulator, the interiors of the fixed three-post insulator and the sliding three-post insulator are both circular shell bodies, the outer sides of the circular shell bodies are fixedly connected with particle traps through connecting columns, and the particle traps are provided with contacts at the outer sides of the connecting columns, wherein: and ultrasonic sensors are arranged at the contact parts of the three supporting legs of the fixed three-column insulator and the tank body and at the contact parts of the three supporting legs of the sliding three-column insulator and the tank body and the contact head. The invention can integrally solve the defects of the existing partial discharge monitoring device or the partial discharge online monitoring system when applied to GIL partial discharge detection through the integral structure of the equipment, can realize all-weather detection through optimizing the design of the whole machine, and is suitable for intermittent partial discharge detection.
Description
Technical Field
The invention relates to the field of live detection and online monitoring of power equipment, in particular to a GIL partial discharge ultrasonic array detection and positioning device.
Background
The GIL is an important component of an extra-high voltage power transmission and transformation system. Statistics show that insulation defects are a significant cause of GIL failure, while partial discharges are a significant symptom reflecting insulation degradation.
Depending on the detection principle and means, the partial discharge detection method is commonly used, such as an ultrasonic method, an ultrahigh frequency method, and a high frequency current method. The number of insulation basins reserved on the GIL equipment is small, and only a few insulation basins reserved with ultrahigh frequency signal measurement windows are reserved, so that the ultrahigh frequency method is not high in practicability in the partial discharge detection of the GIL equipment. GIL equipment is usually longer, and the length of an air chamber exceeds dozens of meters, and high-frequency current signals are extremely easy to be interfered, and the practicality is not strong. Therefore, the ultrasonic method is generally used as the most common means for detecting the partial discharge of the GIL.
GIL device partial discharge detection also faces the following problems: because the length of the GIL equipment is long, the length of one air chamber usually exceeds dozens of meters, and the position of a partial discharge fault point is difficult to position; the GIL equipment is applied to an extra-high voltage power transmission and transformation system, the attach value is very high, the daily inspection frequency is high, faults cannot be processed when the faults are accumulated seriously, so the partial discharge detection of the GIL is usually carried out at the early stage of the occurrence of partial discharge, and partial discharge signals of the GIL are often very weak and are not easy to find; also, because GIL devices are highly valued, partial discharge detection is usually performed at an early stage of partial discharge, which is not frequent, and is expressed in the form of intermittent discharge, and signals of the partial discharge are not easily captured.
The existing partial discharge monitoring device or partial discharge online monitoring system can not well solve the problems when being applied to GIL partial discharge detection, and the defects mainly appear as follows: the equipment comprises detection means such as ultrahigh frequency, ultrasonic waves, high-frequency current and the like, so that an ultrasonic detection channel is insufficient; the conditioning capability of weak ultrasonic signals is insufficient, so that the ultrasonic signals cannot be accurately acquired, and more noise signals are mixed in the signals; part of on-line monitoring equipment is not monitored continuously all weather, and is monitored by a timing mechanism, so that each partial discharge signal cannot be accurately captured, and particularly intermittent partial discharge signals are easy to miss; the anti-interference measures during the installation of the sensor are insufficient, the interference cannot be shielded, and the misjudgment is easily caused; the installation and construction scheme is not scientific, and the partial discharge fault point cannot be accurately positioned, so that a GIL partial discharge ultrasonic array detection and positioning device is provided.
Disclosure of Invention
The invention aims to provide a GIL partial discharge ultrasonic array mounting structure,
the three-column-fixed-type particle trap comprises a tank body, wherein a fixed three-column insulator and a sliding three-column insulator are connected to the outer side of the tank body, the inner parts of the fixed three-column-fixed-type insulator and the sliding three-column-fixed-type insulator are both circular shell bodies, the outer side of each circular shell body is fixedly connected with a particle trap through a connecting column, the particle traps are provided with contacts on the outer sides of the connecting columns, and the outer sides of the contacts of the fixed three-column-fixed-type insulator are fixedly sleeved with a fixing plate;
wherein: and the three supporting legs of the fixed three-post insulator are in contact with the tank body, the three supporting legs of the sliding three-post insulator are in contact with the tank body, and the contact part are provided with ultrasonic sensors, and the ultrasonic sensors form an array arrangement to form an ultrasonic sensor array.
Preferably, the following components: the protection casing has been cup jointed in ultrasonic sensor's the outside, and the lower extreme of protection casing is connected with sectional fixture through the anchorage bar, and sectional fixture is "nearly" word form, it has soundproof cotton to fill in the middle of protection casing and the sectional fixture.
The utility model provides a GIL partial discharge ultrasonic array detection and positioner, includes above-mentioned arbitrary one GIL partial discharge ultrasonic array mounting structure, includes the ultrasonic sensor array, the ultrasonic sensor array passes through transmission line connection signal acquisition unit, the signal acquisition unit passes through 4G gateway connection industrial computer host computer software and backend server.
Preferably: the signal acquisition unit comprises a signal conditioner and an acquisition card, the signal conditioner is connected with the acquisition card through a transmission line, the input end of the signal conditioner is connected with the output end of the ultrasonic sensor array, and the output end of the acquisition card is connected with the input end of the 4G gateway.
Preferably: the signal conditioner specifically is ultrasonic signal conditioning circuit, ultrasonic signal conditioning circuit includes constant current source, blocking capacitor and band pass filter link to each other, and the output of constant current source and ultrasonic sensor array is connected to blocking capacitor's input, the parallel setting of constant current source and ultrasonic sensor array, the acquisition card is connected to band pass filter's output.
Preferably: the background server comprises a webpage and an APP.
Preferably: the software of the upper computer of the industrial personal computer is software built in the industrial personal computer and used for processing equipment management, automatic recording of abnormal signals, signal comparison of different sensors, checking of PRPD (pseudo random digital PD) maps, checking of PRPS (pseudo random digital PS) maps, statistics of signal amplitude trends and checking and acquisition module configuration.
Compared with the prior art, the invention has the beneficial effects that:
the invention can integrally solve the defects existing when the existing partial discharge monitoring device or the partial discharge online monitoring system is applied to GIL partial discharge detection through the integral structure of the device. By means of an ultrasonic array, the detection efficiency can be improved, the partial discharge fault point can be quickly positioned, and the method is very suitable for partial discharge detection of GIL; by optimizing the design of the whole machine, all-weather detection can be realized, and the method is suitable for detecting intermittent partial discharge; the problem that weak ultrasonic signals are difficult to collect is solved through the ultrasonic signal conditioning circuit; the clamp of the ultrasonic sensor solves the problem of external interference, and the clamp adapts to the structural characteristics of GIL equipment through a scientific installation scheme.
Drawings
FIG. 1 is an installation view of the present invention;
FIG. 2 is a schematic view of a three post insulator structure according to the present invention;
FIG. 3 is a functional diagram of the system of the present invention;
FIG. 4 is an ultrasonic signal conditioning circuit of the present invention;
FIG. 5 is a diagram of the filtering effect of the ultrasonic signal conditioning circuit according to the present invention;
FIG. 6 is a diagram of the anti-tamper fixture of the sensor of the present invention;
FIG. 7 shows PRPD and PRPS patterns of four typical discharges of the tip, insulation, suspension and particles of the present invention.
In the figure:
a tank body; 2. sliding the three-post insulator; 3. fixing the three-post insulator; 4. a particulate trap; 5. a first fixing plate; 6. and a contact.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, a GIL partial discharge ultrasonic array mounting structure,
the tank comprises a tank body 1, wherein the outer side of the tank body 1 is connected with a fixed three-post insulator 3 and a sliding three-post insulator 2, the interiors of the fixed three-post insulator 3 and the sliding three-post insulator 2 are both circular shells, the outer sides of the circular shells are fixedly connected with a particle trap 4 through connecting columns, the particle trap 4 is provided with contacts 6 on the outer sides of the connecting columns, and the outer sides of the contacts 6 of the fixed three-post insulator 3 are fixedly sleeved with a fixing plate 5;
wherein: and the three supporting legs of the fixed three-column insulator 3 and the contact part of the tank body and the three supporting legs of the sliding three-column insulator 2 and the contact part of the tank body are provided with ultrasonic sensors, and the ultrasonic sensors form an array arrangement to form an ultrasonic sensor array.
Specifically, the method comprises the following steps: the ultrasonic sensor is a sensor array consisting of 12 sensors, the ultrasonic sensor is a sensor existing in the market, and in the prior art, the fixed three-post insulator 3 and the conductor are welded with the tank body 1 through the fixing plate after being relatively fixed, so that the relative displacement between the conductor and the tank body 1 caused by transportation or hoisting of a bus is prevented, and meanwhile, the bottom potential insert of the fixed three-post insulator 3 is equipotentially connected with the tank body 1 through the three fixing plates 5, and reliable grounding is formed. The sliding three-post insulator 2 and the conductor are relatively fixed, and can be realized by relatively sliding with an externally connected shell, and the contact conductor and the shell are axially and relatively displaced due to expansion caused by heat, contraction caused by cold and the like. The top post of the sliding three-post insulator 2 is provided with two copper graphite contacts 6 to ensure that the insert and the particle catcher are equal in potential with the shell.
The protection casing has been cup jointed in ultrasonic sensor's the outside, and the lower extreme of protection casing is connected with sectional fixture through the anchorage bar, and sectional fixture is "nearly" word form, it has soundproof cotton to fill in the middle of protection casing and the sectional fixture.
Specifically, the method comprises the following steps: the sensor is fixed on the wall of the GIL cylinder, so that the installation process is quick and convenient; then install the protection casing additional on sectional fixture, fill soundproof cotton in the middle of protection casing and the sectional fixture, can effectively avoid the interference of external interference source to the sensor like this, improve signal acquisition's accuracy nature.
Please refer to fig. 3-7, a GIL partial discharge ultrasonic array detection and positioning device, including any one of the above-mentioned GIL partial discharge ultrasonic array mounting structure, including the ultrasonic sensor array, the ultrasonic sensor array passes through transmission line connection signal acquisition unit, signal acquisition unit passes through 4G gateway connection industrial computer host computer software and background server, the background server includes webpage and APP, and webpage and APP are the software of framework in the background server to the background server is current component device in the market, is current mature technology.
The signal acquisition unit comprises a signal conditioner and an acquisition card, the signal conditioner is connected with the acquisition card through a transmission line, the input end of the signal conditioner is connected with the output end of the ultrasonic sensor array, and the output end of the acquisition card is connected with the input end of the 4G gateway.
Specifically, the method comprises the following steps: the sensor array senses the front-end ultrasonic signals; the acquisition unit finishes the acquisition and quantification of ultrasonic signals; the data processing unit is mainly used for finishing data storage, analysis and fault diagnosis, the fault type of partial discharge can be accurately analyzed through the PRPD and PRPS maps of partial discharge signals, and the position of a partial discharge fault point is judged through whether different sensors acquire the signals or not, the strength and attenuation degree of the signals, the time delay of the signals and other factors. The background server unit mainly completes remote checking of data and analysis results, and the 4G gateway adopts existing equipment in the market, and is the prior art and is not described herein any more.
The signal conditioner specifically is ultrasonic signal conditioning circuit, ultrasonic signal conditioning circuit includes constant current source, blocking capacitor and band pass filter link to each other, and the output of constant current source and ultrasonic sensor array is connected to blocking capacitor's input, the parallel setting of constant current source and ultrasonic sensor array, the acquisition card is connected to band pass filter's output.
Specifically, the method comprises the following steps: as shown in fig. 4, the ultrasonic signal conditioning circuit plays a role in supplying power to the sensor, blocking, filtering and amplifying. The constant current source is used for supplying power to the ultrasonic sensor; the blocking capacitor is used for blocking a power supply and separating an ultrasonic wave signal to a rear-stage band-pass filter; the band-pass filter is used for filtering and amplifying the ultrasonic signals from the front stage.
As shown in fig. 5, which is a diagram of the filtering effect of the ultrasonic signal conditioning circuit, according to the engineering experience and the national grid related standard, there is a consensus that the peak frequency of the ultrasonic detection of the GIL device is in the range of 20k to 80kHz. The bandwidth of the band-pass filter designed by the conditioning circuit is 20k to 80kHz.
The upper computer software of the industrial personal computer is software built in the industrial personal computer and is used for processing equipment management, automatic recording of abnormal signals, signal comparison of different sensors, checking of PRPD (pulse-to-pulse Detector) maps, checking of PRPS (pulse-to-pulse protection System) maps, statistics of signal amplitude trends and checking and acquisition module configuration.
As shown in fig. 7, the three types of typical discharge PRPD and PRPS maps are shown, and after the three types of typical discharge PRPD and PRPS maps are generated according to the partial discharge ultrasonic signal algorithm, the four types of typical discharge PRPD and PRPS maps can be compared with the four types of reference maps to determine the discharge type.
While the invention has been described in further detail with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a GIL partial discharge ultrasonic array mounting structure which characterized in that:
the tank comprises a tank body (1), wherein the outer side of the tank body (1) is connected with a fixed three-post insulator (3) and a sliding three-post insulator (2), the interiors of the fixed three-post insulator (3) and the sliding three-post insulator (2) are both circular shells, the outer sides of the circular shells are fixedly connected with a particle trap (4) through connecting columns, contacts (6) are arranged on the outer sides of the connecting columns of the particle trap (4), and fixing plates (5) are fixedly sleeved on the outer sides of the contacts (6) of the fixed three-post insulator (3);
wherein: and the three supporting legs of the fixed three-post insulator (3) are in contact with the tank body, the three supporting legs of the sliding three-post insulator (2) are in contact with the tank body, and the contact parts are provided with ultrasonic sensors, and the ultrasonic sensors form an array arrangement to form an ultrasonic sensor array.
2. The GIL partial discharge ultrasonic array mounting structure according to claim 1, wherein: the protection casing has been cup jointed in ultrasonic sensor's the outside, and the lower extreme of protection casing is connected with sectional fixture through the anchorage bar, and sectional fixture is "nearly" word form, it has soundproof cotton to fill in the middle of protection casing and the sectional fixture.
3. A GIL partial discharge ultrasonic array detection and positioning device is characterized by comprising the GIL partial discharge ultrasonic array installation structure as claimed in any one of claims 1-2, wherein the GIL partial discharge ultrasonic array installation structure comprises an ultrasonic sensor array, the ultrasonic sensor array is connected with a signal acquisition unit through a transmission line, and the signal acquisition unit is connected with upper computer software of an industrial personal computer and a background server through a 4G gateway.
4. The GIL partial discharge ultrasonic array detecting and locating device as claimed in claim 3, wherein: the signal acquisition unit comprises a signal conditioner and an acquisition card, the signal conditioner is connected with the acquisition card through a transmission line, the input end of the signal conditioner is connected with the output end of the ultrasonic sensor array, and the output end of the acquisition card is connected with the input end of the 4G gateway.
5. The GIL partial discharge ultrasonic array detecting and locating device as claimed in claim 4, wherein: the signal conditioner specifically is ultrasonic signal conditioning circuit, ultrasonic signal conditioning circuit includes constant current source, blocking capacitor and band pass filter link to each other, and the output of constant current source and ultrasonic sensor array is connected to blocking capacitor's input, the parallel setting of constant current source and ultrasonic sensor array, the acquisition card is connected to band pass filter's output.
6. The GIL partial discharge ultrasonic array detecting and locating device as claimed in claim 3, wherein: the background server comprises a webpage and an APP.
7. The GIL partial discharge ultrasonic array detecting and locating device as claimed in claim 3, wherein: the upper computer software of the industrial personal computer is software built in the industrial personal computer and is used for processing equipment management, automatic recording of abnormal signals, signal comparison of different sensors, checking of PRPD (pulse-to-pulse Detector) maps, checking of PRPS (pulse-to-pulse protection System) maps, statistics of signal amplitude trends and checking and acquisition module configuration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211614559.4A CN115951180A (en) | 2022-12-13 | 2022-12-13 | GIL partial discharge ultrasonic array detection and positioning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211614559.4A CN115951180A (en) | 2022-12-13 | 2022-12-13 | GIL partial discharge ultrasonic array detection and positioning device |
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| CN115951180A true CN115951180A (en) | 2023-04-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347797A (en) * | 2023-09-28 | 2024-01-05 | 中国长江电力股份有限公司 | Ultrasonic array detection device and method for partial discharge |
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- 2022-12-13 CN CN202211614559.4A patent/CN115951180A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347797A (en) * | 2023-09-28 | 2024-01-05 | 中国长江电力股份有限公司 | Ultrasonic array detection device and method for partial discharge |
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