CN115951285A - Method and system for detecting arrangement effectiveness of GIS built-in sensor - Google Patents
Method and system for detecting arrangement effectiveness of GIS built-in sensor Download PDFInfo
- Publication number
- CN115951285A CN115951285A CN202210348424.1A CN202210348424A CN115951285A CN 115951285 A CN115951285 A CN 115951285A CN 202210348424 A CN202210348424 A CN 202210348424A CN 115951285 A CN115951285 A CN 115951285A
- Authority
- CN
- China
- Prior art keywords
- sensor
- transmission loss
- gis
- built
- average transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a method and a system for detecting arrangement effectiveness of a GIS built-in sensor, wherein the method comprises the following steps: selecting any adjacent first sensor and second sensor which are arranged in the GIS; removing the signal transmission line between the first end of the first sensor and the second end of the second sensor; respectively connecting a measuring device to a first end of the first sensor and a second end of the second sensor to obtain average transmission loss curves of the first sensor and the second sensor; determining validity of the first and second sensor arrangements built into the GIS based on the average transmission loss curve. The invention realizes scientific and effective evaluation of the arrangement of the extra-high voltage GIS built-in sensor, reduces the installation of unnecessary measuring point sensor equipment and improves the economic benefit.
Description
Technical Field
The invention relates to the technical field of state sensing of power transmission and transformation equipment, in particular to a method and a system for detecting arrangement effectiveness of a GIS built-in sensor.
Background
Gas Insulated Switchgear GIS (Gas Insulated Switchgear) is a critical device of a power system, and its main functions are to remove power system faults and change the system operation mode. With the increase of the scale of a power grid in China, GIS insulation discharge faults occur frequently, therefore, a GIS ultrahigh Frequency (UHF) sensor is usually adopted on site to detect whether partial discharge exists in the GIS, and further whether insulation discharge fault hidden dangers exist in the GIS is judged, and the GIS faults are avoided.
The ultrahigh frequency sensor can be divided into an external sensor and an internal sensor according to the installation mode. The external sensor is usually installed at the edge of the GIS basin-type insulator, and the local discharge detection is realized by detecting electromagnetic wave signals leaked from the flange, but the detection sensitivity of the external sensor is not high due to the influence of electromagnetic wave attenuation and external electromagnetic interference. The built-in sensor is arranged in the GIS cavity, so that the attenuation of electromagnetic waves is small, and meanwhile, the metal pipeline can effectively shield external electromagnetic interference signals, so that the built-in ultrahigh frequency sensor has high detection sensitivity.
In recent years, most GIS manufacturers adopt a metal flange basin-type insulator, so that electromagnetic waves generated by partial discharge are completely shielded inside the GIS, and signals are difficult to detect by using an external sensor outside the GIS, which further highlights the necessity of installing and using a built-in sensor. Under the influence of the GIS structure, the parameters such as waveform and amplitude value of electromagnetic waves caused by partial discharge and transmitted to the built-in sensor are changed, and the complexity of positioning the partial discharge source is increased. Factors such as the arrangement position and the number of the built-in sensors directly influence the detection effectiveness of partial discharge signals in the GIS. The prior art does not relate to the research on the arrangement effectiveness of GIS built-in sensors.
Therefore, in order to increase effectiveness and accuracy of detecting partial discharge in the extra-high voltage GIS, a method for detecting the distribution effectiveness of the built-in ultrahigh frequency sensor in the extra-high voltage GIS is urgently needed.
Disclosure of Invention
The technical scheme of the invention provides a method and a system for detecting arrangement effectiveness of a GIS built-in sensor, which aim to solve the problem of how to detect the arrangement effectiveness of the GIS built-in sensor.
In order to solve the above problems, the present invention provides a method for detecting validity of an arrangement of a GIS built-in sensor, the method comprising:
selecting any adjacent first sensor and second sensor which are arranged in the GIS;
removing the signal transmission line between the first end of the first sensor and the second end of the second sensor;
respectively connecting a measuring device to a first end of the first sensor and a second end of the second sensor to obtain an average transmission loss curve of the first sensor and the second sensor;
determining validity of the first and second sensor arrangements built into the GIS based on the average transmission loss curve.
Preferably, the method comprises the following steps: calculating an average transmission loss between the first sensor and the second sensor from the average transmission loss curve;
comparing the average transmission loss with a transmission loss threshold value, and determining that the first sensor and the second sensor built in the GIS are arranged to be effective when the average transmission loss is smaller than the transmission loss threshold value.
Preferably, the transmission loss threshold is 70dB.
Preferably, the measuring device comprises: a network analyzer or a return loss tester.
Preferably, the first sensor and the second sensor are uhf sensors.
Based on another aspect of the invention, the invention provides a system for detecting the effectiveness of the arrangement of the built-in sensors of the GIS, which comprises the following components:
the initial unit is used for selecting any adjacent first sensor and second sensor which are arranged in the GIS; removing the signal transmission line between the first end of the first sensor and the second end of the second sensor;
the measuring unit is used for connecting a measuring device to the first end of the first sensor and the second end of the second sensor respectively to obtain average transmission loss curves of the first sensor and the second sensor;
a result unit for determining validity of the GIS built-in first sensor and second sensor arrangement based on the average transmission loss curve.
Preferably, the result unit is further configured to: calculating an average transmission loss between the first sensor and the second sensor from the average transmission loss curve;
comparing the average transmission loss with a transmission loss threshold value, and determining that the first sensor and the second sensor built in the GIS are arranged to be effective when the average transmission loss is smaller than the transmission loss threshold value.
Preferably, the transmission loss threshold is 70dB.
Preferably, the measuring device comprises: a network analyzer or a return loss test instrument.
Preferably, the first sensor and the second sensor are ultrahigh frequency sensors.
The technical scheme of the invention provides a method and a system for detecting arrangement effectiveness of a GIS built-in sensor, wherein the method comprises the following steps: selecting any adjacent first sensor and second sensor which are arranged in the GIS; removing the signal transmission line between the first end of the first sensor and the second end of the second sensor; respectively connecting a measuring device to a first end of a first sensor and a second end of a second sensor to obtain average transmission loss curves of the first sensor and the second sensor; the effectiveness of the first and second sensor arrangements built into the GIS is determined based on the average transmission loss curve. According to the technical scheme, the effectiveness and the accuracy of detecting the partial discharge in the ultra-high voltage GIS are improved, unnecessary sensor arrangement can be reduced, the economic benefit is improved, and the method is used for detecting the distribution effectiveness of the built-in ultra-high frequency sensor in the ultra-high voltage GIS.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method for detecting the effectiveness of a GIS built-in sensor arrangement in accordance with a preferred embodiment of the present invention;
fig. 2 is a graph showing a transmission loss curve of S21 greater than 70dB according to a preferred embodiment of the present invention:
FIG. 3 is a graph showing a transmission loss curve S21 of less than 70dB in accordance with a preferred embodiment of the present invention; and
fig. 4 is a diagram illustrating a system for checking the validity of an arrangement of built-in sensors of a GIS according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method for detecting validity of an arrangement of GIS built-in sensors according to a preferred embodiment of the present invention. The invention solves the problem that the sensor distribution is lack of a scientific and effective evaluation method in the arrangement process of the built-in sensor of the extra-high voltage GIS, increases the effectiveness and accuracy of detecting the partial discharge signal in the extra-high voltage GIS, reduces the installation of unnecessary measuring point sensor equipment, and improves the economic benefit.
As shown in fig. 1, the technical solution of the present invention provides a method for detecting validity of an arrangement of a GIS built-in sensor, the method comprising:
step 101: selecting any adjacent first sensor and second sensor which are arranged in the GIS; preferably, the first sensor and the second sensor are uhf sensors.
Step 102: removing the signal transmission line between the first end of the first sensor and the second end of the second sensor;
according to the invention, a transmission loss method is adopted when the distribution effectiveness of the built-in ultrahigh frequency sensor of the extra-high voltage GIS is detected, and signal transmission lines on any two adjacent sensor units are taken down firstly (for the sensor unit with the protection terminal, the protection terminal is not required to be taken down).
Step 103: respectively connecting a measuring device to a first end of a first sensor and a second end of a second sensor to obtain an average transmission loss curve of the first sensor and the second sensor; preferably, the measuring means comprises: a network analyzer or a return loss tester.
The present invention measures the average transmission loss curve by connecting the measuring lead of a measuring device, such as a network analyzer or a transmission loss special tester, to a sensor unit.
Step 104: the effectiveness of the first and second sensor arrangements built into the GIS is determined based on the average transmission loss curve.
Preferably, the method comprises the following steps: calculating an average transmission loss between the first sensor and the second sensor through an average transmission loss curve;
the average transmission loss is compared with a transmission loss threshold value, and when the average transmission loss is less than the transmission loss threshold value, it is determined that the first sensor and the second sensor built in the GIS are arranged to be effective.
Preferably, the transmission loss threshold is 70dB.
The invention measures the average transmission loss curve between two adjacent sensors, and the measuring method of the average transmission loss curve is as follows:
selecting an S21 or S12 parameter measurement function of a network analyzer or a transmission loss test instrument;
connecting the measuring lead to a measuring port of a network analyzer or a transmission loss testing instrument;
connecting a calibration piece of the network analyzer or the transmission loss tester to the measurement lead wire for calibration;
connecting the measuring lead to a component to be measured, such as a protection terminal, a signal transmission line or a sensor unit;
automatically measuring by a network analyzer or a transmission loss tester to obtain a transmission loss curve;
and calculating the transmission loss of each frequency point according to the transmission loss curve to obtain an arithmetic mean value to obtain the average transmission loss. Let the transmission losses of 801 measurement points be A respectively 1 、A 2 、……、A 801 ，
C＝20log(B)
C is the average transmission loss.
The average transmission loss between any two adjacent sensors in the invention is less than or equal to 70dB.
The method for detecting the stationing effectiveness of the built-in ultrahigh frequency sensor has the advantages of easiness in operation, easiness in implementation and high judgment accuracy. By utilizing the detection method, the arrangement mode of the built-in ultrahigh frequency sensor is optimized, the property consumption caused by unreasonable installation of the sensor is reduced, and the economic benefit of the ultra-high voltage GIS operation and maintenance is improved.
The transmission loss of 170 ultrahigh frequency sensors of a 1000kV extra-high voltage transformer substation in a certain station is tested, and the qualified test result and the unqualified test result are respectively shown in the attached figures 2 and 3. The detection method provided by the invention has a good testing effect on the stationing effectiveness of the extra-high voltage sensor.
Fig. 4 is a block diagram of a system for detecting the effectiveness of a built-in sensor arrangement of a GIS according to a preferred embodiment of the present invention. As shown in fig. 4, the present invention provides a system for detecting validity of an arrangement of built-in sensors of a GIS, the system comprising:
an initial unit 401, configured to select any adjacent first sensor and second sensor that are built in a GIS; removing the signal transmission line between the first end of the first sensor and the second end of the second sensor; preferably, the first sensor and the second sensor are uhf sensors.
A measuring unit 402, configured to connect a measuring device to a first end of the first sensor and a second end of the second sensor, respectively, and obtain an average transmission loss curve of the first sensor and the second sensor; preferably, the measuring means comprises: a network analyzer or a return loss tester.
A result unit 403 for determining the validity of the first and second sensor arrangement built into the GIS based on the average transmission loss curve.
Preferably, the result unit 403 is further configured to: calculating an average transmission loss between the first sensor and the second sensor through an average transmission loss curve;
and comparing the average transmission loss with a transmission loss threshold value, and determining that the first sensor and the second sensor which are arranged in the GIS are effective when the average transmission loss is less than the transmission loss threshold value.
Preferably, the transmission loss threshold is 70dB.
The system 400 for detecting the validity of the arrangement of the GIS built-in sensor according to the preferred embodiment of the present invention corresponds to the method 100 for detecting the validity of the arrangement of the GIS built-in sensor according to the preferred embodiment of the present invention, and is not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
1. A method of detecting validity of a GIS built-in sensor arrangement, the method comprising:
selecting any adjacent first sensor and second sensor which are arranged in the GIS;
removing the signal transmission line between the first end of the first sensor and the second end of the second sensor;
respectively connecting a measuring device to a first end of the first sensor and a second end of the second sensor to obtain an average transmission loss curve of the first sensor and the second sensor;
determining validity of the first and second sensor arrangements built into the GIS based on the average transmission loss curve.
2. The method of claim 1, comprising: calculating an average transmission loss between the first sensor and the second sensor from the average transmission loss curve;
comparing the average transmission loss with a transmission loss threshold value, and determining that the first sensor and the second sensor built in the GIS are arranged to be effective when the average transmission loss is smaller than the transmission loss threshold value.
3. The method of claim 2, the transmission loss threshold being 70dB.
4. The method of claim 1, the measurement device comprising: a network analyzer or a return loss test instrument.
5. The method of claim 1, the first sensor and the second sensor being uhf sensors.
6. A system for detecting the effectiveness of a GIS built-in sensor arrangement, the system comprising:
the initial unit is used for selecting any adjacent first sensor and second sensor which are arranged in the GIS; removing the signal transmission line between the first end of the first sensor and the second end of the second sensor;
the measuring unit is used for connecting a measuring device to the first end of the first sensor and the second end of the second sensor respectively to obtain average transmission loss curves of the first sensor and the second sensor;
a result unit for determining the validity of the GIS built-in first and second sensor arrangement based on the average transmission loss curve.
7. The system of claim 6, the results unit further to: calculating an average transmission loss between the first sensor and the second sensor from the average transmission loss curve;
comparing the average transmission loss with a transmission loss threshold value, and determining that the first sensor and the second sensor built in the GIS are arranged to be effective when the average transmission loss is smaller than the transmission loss threshold value.
8. The system of claim 7, the transmission loss threshold is 70dB.
9. The system of claim 6, the measurement device comprising: a network analyzer or a return loss test instrument.
10. The system of claim 6, the first sensor and the second sensor being uhf sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348424.1A CN115951285A (en) | 2022-04-01 | 2022-04-01 | Method and system for detecting arrangement effectiveness of GIS built-in sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348424.1A CN115951285A (en) | 2022-04-01 | 2022-04-01 | Method and system for detecting arrangement effectiveness of GIS built-in sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115951285A true CN115951285A (en) | 2023-04-11 |
Family
ID=87297226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210348424.1A Pending CN115951285A (en) | 2022-04-01 | 2022-04-01 | Method and system for detecting arrangement effectiveness of GIS built-in sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115951285A (en) |
-
2022
- 2022-04-01 CN CN202210348424.1A patent/CN115951285A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100691655B1 (en) | Apparatus and method for detecting partial electric discharge of gas insulation device | |
| Ramírez-Niño et al. | Acoustic measuring of partial discharge in power transformers | |
| EP2574941A2 (en) | Method of estimating location of partial discharge using signal attenuation rate in GIS tank | |
| KR101290294B1 (en) | Partial discharge diagnostic system of power apparatus using contactless phase measurement sensor | |
| KR20070096498A (en) | Partial discharge measurement system for power cable | |
| JP2015078882A (en) | Insulation diagnostic device | |
| CN105891761A (en) | Scattering parameter-based partial discharge ultrahigh frequency detection system field check method | |
| CN110703076A (en) | GIS fault diagnosis method based on vibration signal frequency domain energy ratio | |
| CN104535955A (en) | Calibration device and method of transformer frequency response method winding deformation tester | |
| JP2009222537A (en) | Partial discharge detecting method by electromagnetic wave measurement | |
| CN107462853A (en) | A kind of scaling method of superfrequency partial discharge detecting system | |
| CN108020801B (en) | GIL equipment built-in ultrahigh frequency sensor sensitivity field checking system and method | |
| KR101843792B1 (en) | Method for deciding partial discharge for power equipment | |
| KR100632078B1 (en) | Noise discriminating device and method for detect the partial discharge in underground power cable | |
| CN101975912A (en) | Transformer partial discharge on-line monitoring method and device | |
| CN115951285A (en) | Method and system for detecting arrangement effectiveness of GIS built-in sensor | |
| CN116500433A (en) | Multi-parameter combined online monitoring system and method for split on-load tap-changer | |
| CN111239665A (en) | GIS partial discharge calibration device and method | |
| CN110895322A (en) | Interturn short circuit diagnosis method for solid insulation voltage transformer | |
| KR101515231B1 (en) | A method of partial discharge diagnosis for gas insulated switchgear | |
| CN201765301U (en) | Online monitor apparatus for partial discharge of transformer | |
| Ji et al. | Review of partial discharge detection technology for transient earth voltage of HV switchgear cabinet | |
| JP3895450B2 (en) | Rotating electrical machine abnormality detection device | |
| Ono et al. | Experience of GIS condition diagnosis using partial discharge monitoring by UHF method | |
| KR100590801B1 (en) | Apparatus for measuring electromagnetic waves radiated from electric power equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |