CN113933695A - Method for online judging vacuum on-load tap-changer fault based on gas component identification - Google Patents
Method for online judging vacuum on-load tap-changer fault based on gas component identification Download PDFInfo
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- CN113933695A CN113933695A CN202111185052.7A CN202111185052A CN113933695A CN 113933695 A CN113933695 A CN 113933695A CN 202111185052 A CN202111185052 A CN 202111185052A CN 113933695 A CN113933695 A CN 113933695A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 238000011208 chromatographic data Methods 0.000 claims abstract description 32
- 238000004817 gas chromatography Methods 0.000 claims abstract description 28
- 238000012806 monitoring device Methods 0.000 claims abstract description 28
- 238000005336 cracking Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 238000012795 verification Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 46
- 238000004804 winding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The method for judging the fault of the vacuum on-load tap-changer on line based on the gas component identification comprises the steps of arranging a gas chromatography on-line monitoring device at a vacuum on-load tap-changer breather, starting the gas chromatography on-line monitoring device after the vacuum on-load tap-changer is switched, converting a substance signal into an electric signal, and sending to an operation monitoring platform, the operation monitoring platform comparing the received chromatographic data represented by the electrical signal with the chromatographic data in the database, analyzing the chromatographic component in the gas, a voltage and current detection device reading the voltage and current signals of the vacuum on-load tap-changer, and the read voltage and current signals are compared with voltage and current data in a database by the operation monitoring platform, the obtained gas component result is combined with the voltage and current result, and the fault of the vacuum on-load tap-changer is judged on line. The mutual verification of the cracking condition of the insulating oil and the chromatographic component in the gas improves the accuracy of the fault judgment of the vacuum on-load tap-changer.
Description
Technical Field
The application relates to the field of vacuum on-load tap-changer monitoring, in particular to a method for judging vacuum on-load tap-changer faults on line based on gas component identification.
Background
The on-load tap changer is a device for regulating output voltage in a transformer, under the condition of transformer excitation or load, the tap ratio of high-voltage and low-voltage windings is changed by switching the tap of the transformer winding so as to regulate the output voltage, and the on-load tap changer plays an important role in the voltage regulation of a power system.
The vacuum on-load tap-changer is one of on-load tap-changers adopted by power transformers, a change-over switch of the vacuum on-load tap-changer is soaked in insulating oil, the vacuum on-load tap-changer adopts a closed vacuum bulb to extinguish arcs, the vacuum on-load tap-changer carries out oil chromatography detection before operation, and the vacuum on-load tap-changer is basically in an operation-free state during operation. However, the switching contact (including the main current-carrying contact, the transition contact and the vacuum arc-extinguishing contact) of the vacuum on-load tap-changer is worn or ablated, so that the switching contact is in poor contact, and further, a small amount of gear shifting operation is caused to cause the contact to be overheated, so that the contact is converted into arc discharge, and a fault is caused.
In order to inform maintenance personnel of fault handling in time when a vacuum on-load tap-changer has a fault, the state of the vacuum on-load tap-changer needs to be monitored, gas collection of a gas relay is adopted to give an alarm in the prior art, the gas relay enables a contact of the gas relay to act to send an alarm signal when oil tapping generates gas or oil flow surges due to the fact that the internal fault of the vacuum on-load tap-changer is utilized, however, gas can be generated during operation of the vacuum on-load tap-changer, and light gas can be mistakenly alarmed after much gas collection is generated, so that the accuracy of fault judgment of the vacuum on-load tap-changer is low.
Disclosure of Invention
The application provides a method for judging the fault of a vacuum on-load tap-changer on line based on gas component identification, which aims to solve the technical problem of low accuracy of the fault judgment of the vacuum on-load tap-changer.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
in a first aspect, the embodiment of the application discloses a method for judging the fault of a vacuum on-load tap-changer on line based on gas component identification, which comprises the steps of installing a gas chromatography on-line monitoring device at a breather of the vacuum on-load tap-changer;
after the vacuum on-load tap-changer is switched, starting a gas chromatography on-line monitoring device, converting a signal of a substance into an electric signal by the gas chromatography on-line monitoring device, sending the electric signal to an operation monitoring platform, comparing chromatographic data represented by the received electric signal with chromatographic data in a database of the vacuum on-load tap-changer by the operation monitoring platform, and analyzing various chromatographic components in the gas;
reading voltage and current signals of the vacuum on-load tap-changer by using a voltage and current detection device, transmitting the read voltage and current signals to an operation monitoring platform, and comparing the read voltage and current signals with voltage and current data in a database by the operation monitoring platform;
and combining the result of the gas components obtained by the operation monitoring platform with the voltage and current results, and judging the fault of the vacuum on-load tap-changer on line.
Optionally, the operating monitoring platform compares the chromatographic data represented by the received electrical signal with the chromatographic data in the database of the vacuum on-load tap-changer, and after analyzing various chromatographic components in the gas, the operating monitoring platform further includes:
when the chromatographic data generated by the gas chromatography on-line monitoring device is less than or equal to the chromatographic value of the chromatographic data in the database, the vacuum on-load tap-changer is normal;
and when the chromatographic data generated by the gas chromatography on-line monitoring device is larger than the chromatographic value of the chromatographic data in the database, the vacuum on-load tap-changer fails.
Optionally, the operation monitoring platform compares the chromatographic data represented by the received electrical signal with the chromatographic data in the database of the vacuum on-load tap-changer, and analyzes various chromatographic components in the gas, and the operation monitoring platform further includes:
and (3) sampling a gas sample and a standard gas mixture containing the components to be detected in the same volume to obtain a chromatogram, comparing the peak values of the corresponding components in the gas sample and the standard gas mixture, and calculating the content of the corresponding components in the gas sample by adopting the composition data of the standard gas mixture.
Optionally, after the tap changer is switched over, the gas chromatography on-line monitoring device is started, further including:
the gas chromatography on-line monitoring device detects the content of acetylene, ethylene, ethane and methane.
Optionally, the operation monitoring platform compares the read voltage and current signals with the voltage and current data in the database, and further includes:
the voltage and current data in the database include but are not limited to the cracking condition of the insulating oil generated under different voltage and current conditions.
The beneficial effect of this application does:
the method for judging the fault of the vacuum on-load tap-changer on line based on gas component identification comprises the steps that a gas chromatography on-line monitoring device is installed at a breather of the vacuum on-load tap-changer, the gas chromatography on-line monitoring device is started after the vacuum on-load tap-changer is switched, a signal of a substance is converted into an electric signal by the gas chromatography on-line monitoring device and is sent to an operation monitoring platform, the operation monitoring platform compares chromatographic data represented by the received electric signal with chromatographic data in a database of the vacuum on-load tap-changer, the chromatographic component in the gas is analyzed, a voltage and current signal of the vacuum on-load tap-changer is read by a voltage and current detection device and is transmitted to the operation monitoring platform, and the operation monitoring platform transmits the read voltage and current signal to the voltage, current signal and the voltage, current signal in the database, And comparing the current data, combining the obtained gas component result with the voltage and current result, and judging the fault of the vacuum on-load tap-changer on line. The read voltage and current signals are compared with the voltage and current data in the database to judge whether the cracking condition of the insulating oil is normal or not, and the chromatographic change can be caused by the cracking of the insulating oil, so that the cracking condition of the insulating oil can be obtained by monitoring the voltage and current data, and meanwhile, the chromatographic component condition in the gas can be obtained by monitoring the gas chromatogram at the breather of the vacuum on-load tap-changer, so that the cracking condition of the insulating oil and the chromatographic component condition in the gas can be verified mutually, and the accuracy of fault judgment of the vacuum on-load tap-changer is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for online fault determination of a vacuum on-load tap-changer based on gas component identification according to an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
Referring to fig. 1, the embodiment of the present application provides a method for online determination of a vacuum on-load tap changer fault based on gas composition identification, which may include, for example, steps S110 to S140.
Step S110: a gas chromatography on-line monitoring device is installed at a breather of the vacuum on-load tap-changer.
In some embodiments, after the tap changer is switched, the gas chromatography online monitoring device is started, further comprising:
the gas chromatography on-line monitoring device detects the content of acetylene, ethylene, ethane and methane, and can determine whether the vacuum on-load tap-changer has faults according to the content of various gases.
Step S120: after the vacuum on-load tap-changer is switched, the gas chromatography on-line monitoring device is started, converts a signal of a substance into an electric signal and sends the electric signal to the operation monitoring platform, and the operation monitoring platform compares chromatographic data represented by the received electric signal with chromatographic data in a database of the vacuum on-load tap-changer and analyzes various chromatographic components in gas.
In some embodiments, a gas sample and a standard gas mixture containing components to be detected in equal volume are injected to obtain a chromatogram, peak values of corresponding components in the gas sample and the standard gas mixture are compared, the content of the corresponding components in the gas sample is calculated by adopting composition data of the standard gas mixture, when chromatographic data generated by a gas chromatography online monitoring device is smaller than or equal to a chromatographic value of chromatographic data in a database, a vacuum on-load tap-changer is normal, when the chromatographic data generated by the gas chromatography online monitoring device is larger than the chromatographic value of chromatographic data in the database, the vacuum on-load tap-changer has a fault, and whether the vacuum on-load tap-changer has the fault can be determined according to the content of various gases.
Step S130: and a voltage and current detection device is used for reading voltage and current signals of the vacuum on-load tap-changer and transmitting the read voltage and current signals to an operation monitoring platform, and the operation monitoring platform compares the read voltage and current signals with voltage and current data in a database.
In some embodiments, the operation monitoring platform compares the read voltage and current signals with the voltage and current data in the database, and further includes:
the voltage and current data in the database include but are not limited to the insulation oil cracking condition generated under different voltage and current conditions, and the oil cracking condition can reflect whether the vacuum on-load tap-changer has a fault or not.
Step S140: and combining the result of the gas components obtained by the operation monitoring platform with the voltage and current results, and judging the fault of the vacuum on-load tap-changer on line.
As can be seen from the above embodiments, the method for online judging vacuum on-load tap-changer fault based on gas component identification provided in the embodiments of the present application includes installing a gas chromatography online monitoring device at a breather of a vacuum on-load tap-changer, starting the gas chromatography online monitoring device after switching of the vacuum on-load tap-changer is completed, the gas chromatography online monitoring device converts a signal of a substance into an electrical signal and sends the electrical signal to an operation monitoring platform, the operation monitoring platform compares chromatographic data represented by the received electrical signal with chromatographic data in a database of the vacuum on-load tap-changer to analyze a chromatographic component in a gas, a voltage and current signal of the vacuum on-load tap-changer is read by using a voltage and current detection device and the read voltage and current signal is transmitted to the operation monitoring platform, and the operation monitoring platform transmits the read voltage and current signal and the voltage, current, and the voltage, and the current in the database, And comparing the current data, combining the obtained gas component result with the voltage and current result, and judging the fault of the vacuum on-load tap-changer on line. The read voltage and current signals are compared with the voltage and current data in the database to judge whether the cracking condition of the insulating oil is normal or not, and the chromatographic change can be caused by the cracking of the insulating oil, so that the cracking condition of the insulating oil can be obtained by monitoring the voltage and current data, and meanwhile, the chromatographic component condition in the gas can be obtained by monitoring the gas chromatogram at the breather of the vacuum on-load tap-changer, so that the cracking condition of the insulating oil and the chromatographic component condition in the gas can be verified mutually, and the accuracy of fault judgment of the vacuum on-load tap-changer is improved.
Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.
It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (5)
1. A method for online judging vacuum on-load tap-changer fault based on gas component identification is characterized by comprising the following steps:
a gas chromatography on-line monitoring device is arranged at a respirator of the vacuum on-load tap-changer;
after the switching of the vacuum on-load tap-changer is completed, starting the gas chromatography on-line monitoring device, converting a signal of a substance into an electric signal by the gas chromatography on-line monitoring device, and sending the electric signal to an operation monitoring platform, wherein the operation monitoring platform compares chromatographic data represented by the received electric signal with chromatographic data in a database of the vacuum on-load tap-changer and analyzes various chromatographic components in gas;
reading voltage and current signals of the vacuum on-load tap-changer by using a voltage and current detection device, and transmitting the read voltage and current signals to the operation monitoring platform, wherein the operation monitoring platform compares the read voltage and current signals with voltage and current data in a database;
and the result of the gas component obtained by the operation monitoring platform is combined with the voltage and current results, and the fault of the vacuum on-load tap-changer is judged on line.
2. The method for online judging vacuum on-load tap-changer fault based on gas component identification according to claim 1, wherein the operation monitoring platform compares the chromatographic data represented by the received electrical signal with the chromatographic data in the database of the vacuum on-load tap-changer, and after analyzing various chromatographic components in the gas, the method further comprises:
when the chromatographic data generated by the gas chromatography on-line monitoring device is less than or equal to the chromatographic value of the chromatographic data in the database, the vacuum on-load tap-changer is normal;
and when the chromatographic data generated by the gas chromatography on-line monitoring device is larger than the chromatographic value of the chromatographic data in the database, the vacuum on-load tap-changer fails.
3. The method for online determination of vacuum on-load tap-changer faults based on gas component identification according to claim 1, wherein the operation monitoring platform compares the chromatographic data represented by the received electrical signals with the chromatographic data in the database of the vacuum on-load tap-changer to analyze various chromatographic components in the gas, further comprising:
and (3) sampling a gas sample and a standard gas mixture containing the components to be detected in the same volume to obtain a chromatogram, comparing the peak values of the corresponding components in the gas sample and the standard gas mixture, and calculating the content of the corresponding components in the gas sample by adopting the composition data of the standard gas mixture.
4. The method for online judging vacuum on-load tap-changer fault based on gas component identification according to claim 1, characterized in that after the tap-changer switching is completed, a gas chromatography online monitoring device is started, further comprising:
the gas chromatography on-line monitoring device detects the content of acetylene, ethylene, ethane and methane.
5. The method for online determination of vacuum on-load tap-changer faults based on gas component identification according to claim 1, wherein the operation monitoring platform compares the read voltage and current signals with voltage and current data in a database, further comprising:
the voltage and current data in the database include but are not limited to the cracking condition of the insulating oil generated under different voltage and current conditions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111185052.7A CN113933695A (en) | 2021-10-12 | 2021-10-12 | Method for online judging vacuum on-load tap-changer fault based on gas component identification |
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| CN202111185052.7A CN113933695A (en) | 2021-10-12 | 2021-10-12 | Method for online judging vacuum on-load tap-changer fault based on gas component identification |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241497A (en) * | 2015-09-23 | 2016-01-13 | 国网山东省电力公司日照供电公司 | Transformer monitoring system and fault diagnosis method |
| CN108445384A (en) * | 2018-05-10 | 2018-08-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of change of current becomes the on-line monitoring and appraisal procedure of load ratio bridging switch operating status |
| CN109061459A (en) * | 2018-08-30 | 2018-12-21 | 国网北京市电力公司 | The fault determination method and device of on-load voltage regulating switch, storage medium, processor |
| CN112444577A (en) * | 2020-11-17 | 2021-03-05 | 广东电网有限责任公司电力科学研究院 | Method and system for evaluating switching state of vacuum on-load tap-changer |
-
2021
- 2021-10-12 CN CN202111185052.7A patent/CN113933695A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241497A (en) * | 2015-09-23 | 2016-01-13 | 国网山东省电力公司日照供电公司 | Transformer monitoring system and fault diagnosis method |
| CN108445384A (en) * | 2018-05-10 | 2018-08-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of change of current becomes the on-line monitoring and appraisal procedure of load ratio bridging switch operating status |
| CN109061459A (en) * | 2018-08-30 | 2018-12-21 | 国网北京市电力公司 | The fault determination method and device of on-load voltage regulating switch, storage medium, processor |
| CN112444577A (en) * | 2020-11-17 | 2021-03-05 | 广东电网有限责任公司电力科学研究院 | Method and system for evaluating switching state of vacuum on-load tap-changer |
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