CN112924325A - Gas-insulated transformer monitoring method and device based on mixed gas - Google Patents
Gas-insulated transformer monitoring method and device based on mixed gas Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 45
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- 238000001514 detection method Methods 0.000 claims description 12
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- 239000003595 mist Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 93
- 238000009413 insulation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910018503 SF6 Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
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- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
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- 239000002826 coolant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
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- 230000005518 electrochemistry Effects 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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Abstract
The invention discloses a method and a device for monitoring a gas-insulated transformer based on mixed gas, wherein the method comprises the following steps: acquiring state parameter data of the mixed gas in real time, wherein the parameter data is used for monitoring the state of the mixed gas in the operation condition of the gas-insulated transformer; obtaining current state information according to the parameter data, and comparing the current state information with preset normal state information to obtain a comparison result; and sending the current state information and the comparison result to a display terminal. The method can be used for synchronously and comprehensively monitoring various state parameters of the mixed gas in the gas insulated transformer equipment, and obtaining a monitoring result with higher accuracy.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method and a device for monitoring a gas-insulated transformer based on mixed gas.
Background
The gas-insulated transformer (GIT) has the excellent characteristics of non-combustibility and non-explosion, is suitable for urban areas or underground substations with dense population and narrow sites, and has wide application prospect in offshore wind power platforms with high requirements on anti-explosion. Currently, GIT is usually charged with SF excellent in insulation property6Gas as insulating and cooling medium, but SF6Gases have a large influence on the greenhouse effect and gradually have limited the use, so that technicians try to replace SF with binary or ternary mixed gases6Gas was applied in the GIT.
The existing research mainly focuses on the research on the performance of single parameters of binary or ternary mixed gas, such as insulation performance, physical and chemical performance, decomposition performance and the like, but no scientific and accurate method exists for monitoring a plurality of state parameters of the mixed gas under the simulated GIT operation condition.
Disclosure of Invention
In view of the above technical problems, the present invention provides a method and an apparatus for monitoring a gas-insulated transformer based on a mixed gas, which are used for comprehensively monitoring the condition of a plurality of key state parameters of the mixed gas under the operation condition of the gas-insulated transformer.
The embodiment of the invention provides a gas-insulated transformer monitoring method based on mixed gas, which comprises the following steps:
acquiring state parameter data of the mixed gas in real time, wherein the parameter data is used for monitoring the state of the mixed gas in the operation condition of the gas-insulated transformer;
obtaining current state information according to the parameter data, and comparing the current state information with preset normal state information to obtain a comparison result;
and sending the current state information and the comparison result to a display terminal.
In one embodiment, the state parameter data of the mixed gas comprises mixed gas density, mixed gas temperature and humidity, mixed gas component mixing ratio and mixed gas leakage amount.
In one embodiment, a gas cylinder of preset mixed gas is placed in a high-low temperature experiment box, a temperature value and a pressure value of the preset mixed gas are obtained under the conditions of preset temperature and pressure, and a temperature-pressure characteristic curve is generated;
acquiring a temperature value and a pressure value of the measured mixed gas in the high-low temperature test box, and performing dynamic temperature and pressure compensation according to the temperature-pressure characteristic curve to obtain a target temperature value and a target pressure value of the measured mixed gas;
and obtaining the measured mixed gas density data according to the target temperature value and the pressure value.
In one embodiment, the method for detecting the mixed gas component mixing ratio parameter data comprises absorption spectroscopy detection, thermal conductivity detector detection and electrochemistry.
In one embodiment, the measured humidity measurement results of the mixed gas to be measured at different temperature values are converted into humidity values under the standard condition of 20 ℃.
In one embodiment, the method for detecting the leakage amount of the mixed gas includes a differential detection method.
The embodiment of the invention also provides a gas-insulated transformer monitoring device based on mixed gas, which comprises:
the data acquisition unit is used for acquiring state parameter data of the mixed gas in real time, and the parameter data is used for monitoring the state of the mixed gas in the operation of the gas insulated transformer;
the data monitoring unit is used for obtaining current state information according to the parameter data, and comparing the current state information with preset normal state information to obtain a comparison result;
and the data display unit is used for sending the current state information and the comparison result to a display terminal.
In one embodiment, the state parameter data of the mixed gas comprises mixed gas density, mixed gas temperature and humidity, mixed gas component mixing ratio and mixed gas leakage amount.
In one embodiment, the data obtaining unit is specifically configured to: the method comprises the steps that a gas cylinder with preset mixed gas is placed in a high-low temperature experiment box, the temperature value and the pressure value of the preset mixed gas under the conditions of preset temperature and pressure are obtained, and a temperature-pressure characteristic curve is generated;
acquiring a temperature value and a pressure value of the measured mixed gas in the high-low temperature test box, and performing dynamic temperature and pressure compensation according to the temperature-pressure characteristic curve to obtain a target temperature value and a target pressure value of the measured mixed gas;
and obtaining the measured mixed gas density data according to the target temperature value and the pressure value.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method according to any of the above embodiments.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
according to the method and the device for monitoring the gas-insulated transformer based on the mixed gas, provided by the invention, the comprehensive state monitoring is carried out on various state parameters of the mixed gas in the gas-insulated transformer equipment, the original single parameter monitoring method is integrated, the synchronous comprehensive monitoring on various key parameters of the mixed gas is realized, the time and the process of monitoring the multi-state parameters of the mixed gas under the GIT running condition are saved, and the efficiency of overhauling, operation and maintenance is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for 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 monitoring a gas-insulated transformer based on mixed gas according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a gas-insulated transformer monitoring device based on mixed gas according to an embodiment of the present invention.
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.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
As shown in fig. 1, an embodiment of the present invention provides a method for monitoring a gas-insulated transformer based on mixed gas, including the following steps.
S11: and acquiring state parameter data of the mixed gas in real time, wherein the parameter data is used for monitoring the state of the mixed gas in the operation condition of the gas-insulated transformer.
In this embodiment, the gas-insulated transformer operating conditions include: e-level insulation, the highest temperature is not more than 120 ℃, and the air pressure is between 0.12MPa and 0.19MPa of gauge pressure.
In this embodiment, the state parameter data of the mixed gas includes the mixed gas density, the mixed gas temperature and humidity, the mixed gas component mixing ratio, and the mixed gas leakage amount.
Therefore, the density relay, the hygrometer, the component monitoring sensor, the leakage monitoring sensor and the winding thermometer interface can be considered to be integrated, and the density, the humidity, the component category, the gas leakage condition and the temperature rise condition of the mixed gas can be synchronously and comprehensively monitored.
In this embodiment, the method for detecting the density of the mixed gas includes:
the gas cylinder of the preset mixed gas is placed into a high-low temperature experiment box, and a temperature value and a pressure value of the preset mixed gas are obtained under the conditions of preset temperature and pressure to generate a temperature-pressure characteristic curve.
The preset temperature and pressure conditions include: the rated pressure is 0.1-1.0Mpa when the ambient temperature is 20 ℃.
And acquiring the temperature value and the pressure value of the measured mixed gas in the high-low temperature test box, and dynamically compensating the temperature and the pressure according to the temperature-pressure characteristic curve to obtain the target temperature value and the target pressure value of the measured mixed gas.
The temperature sensor and the pressure sensor can be used for simultaneously detecting the temperature value and the pressure value of the mixed gas to be detected, and the sampling data is sent to the microprocessor for processing.
And obtaining the measured mixed gas density data according to the target temperature value and the pressure value.
Because the inherent errors of the temperature sensor and the pressure sensor cause that the density value of the measured mixed gas displayed by the digital density relay has certain errors with the actual density value, technicians can use the precision calibration function to calibrate the temperature sensor and the pressure sensor by themselves, and the error between the density value displayed by the density relay and the actual density value is in an allowable range. On the other hand, the high-voltage electrical equipment often has a relatively serious electromagnetic interference phenomenon on site, so the structure of the density relay is usually designed by adopting special materials to shield the electromagnetic interference as much as possible.
The measured mixed gas obtained by the method of the embodiment of the invention has small density error and higher accuracy.
In this embodiment, the method for detecting the mixed gas component mixing ratio parameter data includes absorption spectroscopy detection, thermal conductivity detector detection, and electrochemical method.
Specifically, different gas components in the detected mixed gas can be detected by using an absorption spectrum detection method, a thermal conductivity detector and an electrochemical method, and the reliability of the mixed gas mixing ratio detection result is improved by combining a plurality of detection methods.
In this embodiment, the method for detecting the temperature and humidity of the mixed gas includes:
when the mixed gas insulation equipment is similar to the traditional SF6 electrical equipment material, referring to a method for measuring the humidity of the insulating gas in sulfur hexafluoride electrical equipment, converting the measured mixed gas humidity measurement results under different temperature values into humidity values under the standard condition of 20 ℃, judging whether the micro-water content of the measured mixed gas meets a preset micro-water content standard value according to the humidity values, and setting the preset micro-water content standard value according to national standard regulations.
When the tank material of the mixed gas insulation equipment is greatly different from the traditional SF6 electrical equipment material, the adsorption effect of the material on moisture needs to be researched again.
In this embodiment, the system for detecting the temperature and humidity of the mixed gas may be composed of a gas path system, a light path system, a refrigeration system, a plurality of sensors for measuring temperature, flow rate and pressure, a fast response system, a high-speed digital control system, and the like.
In this embodiment, the method for detecting the amount of leakage of the mixed gas includes a differential detection method.
Specifically, a dual-wavelength single-optical-path method and an infrared sensor can be selected to detect the concentration of the measured mixed gas: and obtaining a gas concentration value in the gas chamber, and deducting the gas concentration value in the environment to obtain the leakage amount of the measured mixed gas.
In the embodiment, the accuracy of the leakage amount of the measured mixed gas can be improved by adopting a temperature dynamic compensation mode.
S12: and obtaining current state information according to the parameter data, and comparing the current state information with preset normal state information to obtain a comparison result.
And judging whether the state parameters of the detected mixed gas are abnormal or not according to the comparison result.
S13: and sending the current state information and the comparison result to a display terminal.
The embodiment of the invention provides high-precision data support for the normal operation of the gas insulated transformer by synchronously and comprehensively monitoring various key parameters of the mixed gas, saves monitoring time and working procedures and improves the maintenance, operation and maintenance efficiency of equipment.
As shown in fig. 2, another embodiment of the present invention provides a gas-insulated transformer monitoring apparatus based on mixed gas, which includes a data acquisition unit 101, a data monitoring unit 102, and a data display unit 103.
The data acquisition unit 101 is configured to acquire state parameter data of the mixed gas in real time, where the parameter data is used to monitor a state of the mixed gas in operation of the gas-insulated transformer.
The data monitoring unit 102 is configured to obtain current state information according to the parameter data, and compare the current state information with preset normal state information to obtain a comparison result.
The data display unit 103 is configured to send the current state information and the comparison result to a display terminal.
Because the content of information interaction, execution process, and the like among the units in the device is based on the same concept as the method embodiment of the present invention, specific content can be referred to the description in the method embodiment of the present invention, and is not described herein again.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method according to any of the above embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program, which may be stored in a computer-readable storage medium, and may include the processes of the embodiments of the methods when executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A gas-insulated transformer monitoring method based on mixed gas is characterized by comprising the following steps:
acquiring state parameter data of the mixed gas in real time, wherein the parameter data is used for monitoring the state of the mixed gas in the operation condition of the gas-insulated transformer;
obtaining current state information according to the parameter data, and comparing the current state information with preset normal state information to obtain a comparison result;
and sending the current state information and the comparison result to a display terminal.
2. The method according to claim 1, wherein the state parameter data of the mixed gas comprises mixed gas density, mixed gas temperature and humidity, mixed gas component mixing ratio and mixed gas leakage amount.
3. The method for monitoring the gas-insulated transformer based on the mixed gas as set forth in claim 1 or 2, further comprising:
the method comprises the steps that a gas cylinder with preset mixed gas is placed in a high-low temperature experiment box, the temperature value and the pressure value of the preset mixed gas under the conditions of preset temperature and pressure are obtained, and a temperature-pressure characteristic curve is generated;
acquiring a temperature value and a pressure value of the measured mixed gas in the high-low temperature test box, and performing dynamic temperature and pressure compensation according to the temperature-pressure characteristic curve to obtain a target temperature value and a target pressure value of the measured mixed gas;
and obtaining the measured mixed gas density data according to the target temperature value and the pressure value.
4. The method for monitoring the mixed gas-based gas insulated transformer according to claim 2, wherein the method for detecting the mixed gas component mixture ratio parameter data includes absorption spectroscopy detection, thermal conductivity detector detection and electrochemical method.
5. The method for monitoring the gas-insulated transformer based on the mixed gas as set forth in claim 1 or 2, further comprising:
and converting the humidity measurement results of the measured mixed gas at different temperature values into humidity values under the standard condition of 20 ℃.
6. The method for monitoring the gas-insulated transformer based on the mixed gas as claimed in claim 2, wherein the method for detecting the leakage amount of the mixed gas includes a differential detection method.
7. The utility model provides a gas insulated transformer monitoring devices based on mist which characterized in that includes:
the data acquisition unit is used for acquiring state parameter data of the mixed gas in real time, and the parameter data is used for monitoring the state of the mixed gas in the operation of the gas insulated transformer;
the data monitoring unit is used for obtaining current state information according to the parameter data, and comparing the current state information with preset normal state information to obtain a comparison result;
and the data display unit is used for sending the current state information and the comparison result to a display terminal.
8. The apparatus of claim 7, wherein the state parameter data of the mixed gas comprises mixed gas density, mixed gas temperature and humidity, mixed gas component mixing ratio and mixed gas leakage amount.
9. The gas-insulated transformer monitoring device based on mixed gas as claimed in claim 7, wherein the data acquisition unit is specifically configured to:
the method comprises the steps that a gas cylinder with preset mixed gas is placed in a high-low temperature experiment box, the temperature value and the pressure value of the preset mixed gas under the conditions of preset temperature and pressure are obtained, and a temperature-pressure characteristic curve is generated;
acquiring a temperature value and a pressure value of the measured mixed gas in the high-low temperature test box, and performing dynamic temperature and pressure compensation according to the temperature-pressure characteristic curve to obtain a target temperature value and a target pressure value of the measured mixed gas;
and obtaining the measured mixed gas density data according to the target temperature value and the pressure value.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899860A (en) * | 2021-10-12 | 2022-01-07 | 广东电网有限责任公司电力科学研究院 | Environment-friendly gas insulated transformer is with insulating gaseous mixture on-line monitoring device |
| CN113933211A (en) * | 2021-10-14 | 2022-01-14 | 国网安徽省电力有限公司电力科学研究院 | Ternary mixed gas mixing ratio measuring method and device based on gas substitution method |
| CN113933212A (en) * | 2021-10-14 | 2022-01-14 | 国网安徽省电力有限公司电力科学研究院 | Method and device for measuring mixing ratio of binary mixed gas based on gas density external standard method |
| CN113970587A (en) * | 2021-10-22 | 2022-01-25 | 南方电网科学研究院有限责任公司 | Improved insulation structure suitable for environment-friendly GIT |
| CN115184558A (en) * | 2022-07-15 | 2022-10-14 | 中国电力科学研究院有限公司 | Self-calibration-based mixed gas mixing ratio on-line monitoring method and system |
| CN116481598A (en) * | 2023-06-25 | 2023-07-25 | 中国电力科学研究院有限公司 | Insulating gas non-electric parameter on-line monitoring device |
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