CN213397847U - Gas on-line detection device in power transformer gas relay - Google Patents
Gas on-line detection device in power transformer gas relay Download PDFInfo
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- CN213397847U CN213397847U CN202021353177.7U CN202021353177U CN213397847U CN 213397847 U CN213397847 U CN 213397847U CN 202021353177 U CN202021353177 U CN 202021353177U CN 213397847 U CN213397847 U CN 213397847U
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- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 238000004458 analytical method Methods 0.000 claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000012351 Integrated analysis Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 138
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 7
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 3
- 238000004817 gas chromatography Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of the gaseous on-line measuring of power transformer characteristic, especially, relate to a gaseous on-line measuring device among power transformer gas relay. The utility model discloses detection device is integrated in the metal dustcoat to have automatic unit, gaseous detecting element, intelligent integrated analysis unit and the communication control unit of getting gas, and each unit links to each other in proper order. The utility model discloses can judge transformer internal state and give trip signal through the analysis to gas component among the gas relay at the initial stage that the transformer broke down, in time withdraw from the fault transformer, effectively prevent that the accident from further expanding, do not need traditional manual work to get gas and operation simultaneously, make staff's personal safety obtain effectual guarantee.
Description
Technical Field
The utility model belongs to the technical field of the gaseous on-line measuring of power transformer characteristic, especially, relate to a gaseous on-line measuring device among power transformer gas relay.
Background
At present, most of power transformers in China are oil-immersed transformers, and insulating oil is used as an insulating and heat-dissipating medium. The insulating oil is a mixture of hydrocarbon molecules with different molecular weights, and in actual operation, the transformer insulating oil and the solid insulating material can generate characteristic gases under the action of electricity and heat and enter a gas relay, wherein the characteristic gases comprise carbon monoxide, carbon dioxide, hydrogen, acetylene, ethane, ethylene, methane, oxygen, nitrogen and the like. Because the composition and the content of the characteristic gas have close relation with the type and the severity of equipment faults, the detection of the characteristic gas components in the gas relay is one of important means for judging whether the transformer has faults or not and judging the types of the faults.
According to the regulation requirement, after the light gas action signal of the gas relay gives an alarm, operation and maintenance personnel are required to arrive at a field for sampling, and respectively carry out a field ignition test and laboratory detection and analysis, latent faults existing in the transformer are easily further developed due to long time to cause the transformer to be damaged or even burnt, and meanwhile, personal safety hazards exist in the detection personnel during sampling.
Disclosure of Invention
To the weak point that exists among the above-mentioned prior art, the utility model provides a gas on-line measuring device among power transformer gas relay, its purpose is in order to provide a simple structure, convenient operation to can realize in the initial stage that the transformer broke down, in time propose the early warning, and withdraw from trouble transformer, effectively prevent the accident and further enlarge, make staff's personal safety obtain the effectual invention purpose of guaranteeing.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
the on-line gas detection device in the power transformer gas relay is characterized in that an automatic gas taking unit, a gas detection unit, an intelligent comprehensive analysis unit and a communication control unit are integrated in a metal outer cover, and all the units are sequentially connected.
The automatic air-taking unit comprises an air pump, an automatic exhaust valve, an air inlet, an exhaust hole and a controller, and the air pump is connected to the bottom of the automatic air-taking unit; the automatic exhaust valve is connected to the automatic gas taking unit and is connected to the gas detection unit; the automatic air inlet valve is connected to the automatic air taking unit and is connected with the gas relay through a metal pipe; the automatic gas taking unit is connected with the gas relay and the gas detection unit through a metal hose, and the gas detection unit is connected with the intelligent comprehensive analysis unit through a cable; the intelligent comprehensive analysis unit is connected with the communication control unit through a cable.
The automatic gas taking unit is connected with a gas relay through a pipeline, a one-way exhaust valve K1 is arranged between the automatic gas taking unit and the gas relay, and the other end of the gas relay is connected with a transformer through a pipeline.
The output end of the automatic gas taking unit is connected with the input end of the gas detection unit through a pipeline.
Install chromatographic sensor in the gaseous detecting element, gaseous detecting element passes through cable connection to intelligent analysis unit's input.
The intelligent comprehensive analysis unit is connected to the input end of the communication control unit through a cable; the communication control unit is connected with the main control room through an optical fiber.
The air pump is provided with an air inlet and an air outlet; the air inlet can be opened and closed automatically, and is also provided with an exhaust hole which is connected with a gas detection unit through an exhaust valve.
The communication control unit comprises a control panel, a storage device, a cable and a power line; the communication control unit is connected with the gas detection unit through a cable; the power supply of a 220V alternating current power supply is realized through a power line; the control panel is arranged on the outer surface of the communication control unit.
The control panel comprises an indicator light and a buzzer and is used for distinguishing different judgment results; the indicator light adopts LED, and bee calling organ installs in control panel surface.
The control panel also comprises keys.
The utility model has the following beneficial effects and advantages:
the utility model has the characteristics of simple structure, convenient operation can judge the transformer internal state and give trip signal through the analysis to gas composition among the gas relay at the initial stage that the transformer broke down, in time withdraws from trouble transformer, effectively prevents that the accident from further expanding, does not need traditional manual work to get gas and operation simultaneously, makes staff's personal safety obtain effectual guarantee.
Drawings
In order to facilitate the understanding and the implementation of the present invention for a person having ordinary skill in the art, the present invention is further described in detail with reference to the accompanying drawings and the specific embodiments, but it should be understood that the scope of the present invention is not limited by the accompanying drawings and the specific embodiments.
FIG. 1 is a flow chart of the detection of the present invention;
fig. 2 is a working schematic diagram of the detecting device of the present invention.
Detailed Description
The technical solution in the examples of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work all belong to the protection scope of the present invention.
Example 1
The utility model relates to a gaseous on-line measuring device among power transformer gas relay when having gas among the power transformer gas relay, can automatic start automatic unit of getting gas. As shown in fig. 2, fig. 2 is a working schematic diagram of an online gas detection device in a power transformer gas relay according to an embodiment of the present invention.
The utility model discloses the device is integrated in the metal dustcoat to have automatic unit, gaseous detecting element, intelligent integrated analysis unit and the communication control unit of getting gas, and each unit links to each other in proper order. One side of the device is connected with a gas relay through a metal hose, and the other side of the device is connected with an automatic gas taking unit.
The top of the automatic gas taking unit is connected with the gas relay through a metal hose, the side of the automatic gas taking unit is connected with the side of the gas detection unit, the gas detection unit is connected with the detection result through a cable and an intelligent comprehensive analysis unit to realize signal transmission, and the intelligent comprehensive analysis unit is connected with the communication control unit through a cable to realize signal transmission.
The automatic gas taking unit is connected with a gas relay through a metal pipe, a one-way exhaust valve K1 is arranged between the automatic gas taking unit and the gas relay, and the other end of the gas relay is connected with a transformer through a pipeline. The automatic gas taking unit is internally provided with a gas pump for delivering characteristic gas; the output end of the automatic gas taking unit is connected with the input end of the gas detection unit through a metal pipe, a chromatographic sensor is arranged in the gas detection unit to analyze the concentration of each characteristic gas, and a detection result is sent to the input end of the intelligent analysis unit through a cable; the analysis result of the intelligent analysis unit is sent to the input end of the communication control unit through a cable; and the communication control unit stores the analysis conclusion, remotely transmits the analysis conclusion to the master control room through the optical fiber and sends a corresponding alarm action signal.
The automatic gas taking unit comprises a gas pump, an automatic exhaust valve, a gas inlet, a gas outlet and a controller, the gas pump is arranged at the bottom of the automatic gas taking unit, and the gas pump is automatically started after light gas is alarmed to pump characteristic gas into the automatic gas taking unit; the automatic exhaust valve is arranged on the side surface of the automatic gas taking unit and is connected with the gas detection unit; the automatic air inlet valve is arranged at the top of the automatic air taking unit and is connected with the gas relay through a metal pipe.
The air pump is used for pumping the characteristic gas in the gas relay, and the characteristic gas enters the automatic gas taking unit through the gas inlet hole.
The automatic exhaust valve is used for automatically opening and closing to release redundant gas inside.
The controller is used for controlling the opening and closing states of the gas preparing valve and the gas exhausting valve.
The air inlet can be opened and closed automatically, is also provided with an exhaust valve, is connected with the gas detection unit through the exhaust valve, completes the quantitative collection of gas and conveys the gas to the gas detection unit.
When the utility model is implemented, after the gas relay of the power transformer gives an alarm, the air pump in the automatic air-taking unit is started to guide the characteristic gas in the gas relay into the gas detection unit; the controller of the gas detection unit controls the volume entering the gas detection unit and sends a signal to the automatic exhaust valve to exhaust redundant gas.
The utility model discloses when specifically implementing, gaseous detecting element utilizes gas chromatography to detect the gas appearance, and the measuring range includes the component content of hydrogen, acetylene, ethane, ethylene, methane, oxygen, nitrogen gas, and the testing result will be sent to intelligent integrated analysis unit with the form of electric signal;
the intelligent comprehensive analysis unit analyzes the gas detection result, judges whether the transformer has internal faults or not and sends the judgment result to the communication control unit through a cable in the form of an electric signal;
the raw materials in the power transformer mainly comprise insulating oil and various paper and wood insulating parts, when the inside of the power transformer is in fault, under the action of heat and electricity, C-H bonds, C-C bonds and C-O bonds of the power transformer are broken and rapidly recombined through complex chemical reactions to form hydrogen, carbon monoxide, carbon dioxide, hydrocarbon gas and the like. After the gas enters the gas relay, the gas relay sends out light gas alarm along with the increase of the volume of the gas, and the action volume of the gas relay is 250mL-300 mL. Whether a fault exists in the transformer or not and the fault type can be judged by detecting each characteristic gas component, and the attention value of each characteristic gas is shown in table 1.
When the gas composition exceeds the noted value, the transformer is suspected of internal failure, and the transformer failure types mainly include arc discharge, oiled paper overheating, oil overheating, and the like. Intelligent integrated analysis unit will carry out the analysis to fault type, analytical method includes characteristic gas method and gas content ratio method.
1. The characteristic gas method: the main characteristic gas and the secondary characteristic gas generated by different fault types can be summarized as shown in table 2, so that the fault type of the equipment can be inferred.
2. Gas content ratio method: the gas content ratio method adopted by the utility model is mainly a three-ratio method, which is summarized on the basis of thermodynamics and practice, and utilizes the coding combination of three contrast values of hydrogen and hydrocarbon gas to judge the fault type, as shown in tables 3 and 4.
By the aid of the method, diagnosis of the fault type of the transformer is achieved, and the communication control unit stores diagnosis results and sends the diagnosis results to the main control room through the optical fibers. If the internal fault of the transformer is judged, the internal fault is directly sent to the circuit breakers on all sides, so that the main transformer is quitted from operation. The communication control unit is provided with a control panel, and the control panel comprises an indicator light and a buzzer and is used for alarming after a fault; the control panel is also provided with keys for modifying threshold values of the alarm signals and the action signals, sending control instructions and the like.
Example 2
The utility model relates to a gaseous on-line measuring device among power transformer gas relay can realize carrying out the component analysis to the gas among the transformer gas relay, judges that there are internal failure and fault type in the transformer room, provides the foundation for the processing method on transformer next step. When the specific implementation, as shown in fig. 1, fig. 1 is the utility model relates to a gaseous on-line measuring flow chart of characteristic among power transformer gas relay, including following operation process:
step 1, when gas exists in a gas relay of a power transformer, the device automatically starts an automatic gas taking unit; after an air pump in the automatic air taking unit is started, characteristic air in the air relay is quantitatively led into the air detection unit;
the storage device is used for storing gas component detection results and device intelligent analysis results.
Step 2, the gas detection unit performs gas component chromatographic analysis on the collected characteristic gas, converts an analysis result into an electric signal and sends the electric signal to the intelligent comprehensive analysis unit; the detection principle of the gas detection unit is gas chromatography;
the gas detection unit is provided with a gas inlet hole for connecting the automatic gas taking unit, detecting a gas sample by using a gas chromatography, converting a detection result into an electric signal and sending the electric signal to the intelligent comprehensive analysis unit through a cable.
The characteristic gas comprises the following components: hydrogen, methane, oxygen, nitrogen, ethane, ethylene, acetylene, carbon monoxide and carbon dioxide;
step 3, the intelligent comprehensive analysis unit analyzes the gas detection result, judges whether a fault exists in the power transformer or not, and sends the analysis result to the communication control unit through an electric signal and stores the analysis result;
step 4, the communication control unit sends the analysis result to a main control room, and the intelligent comprehensive analysis unit judges whether the component of the characteristic gas needs to be alarmed or not according to a preset alarm program; if the fault needs to be alarmed, the intelligent comprehensive analysis unit starts a fault alarm indicator lamp to flicker, starts a buzzer, warns operating personnel and stores an analysis result.
The communication control unit comprises a control panel, a storage device, a cable and a power line.
The communication control unit is connected with the gas detection unit through a cable to realize signal transmission; the power supply of a 220V alternating current power supply is realized through a power line; the outer surface is provided with a control panel to realize the indication and operation of each function;
the control panel comprises an indicator light and a buzzer and is used for distinguishing different judgment results.
The control panel comprises an indicator light and a buzzer and is used for distinguishing different judgment results. The indicator light adopts the LED form, and bee calling organ installs in control panel surface.
The control panel also comprises keys used for modifying the threshold values of the alarm signals and the action signals, sending control instructions and the like.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Table 1 unit of attention to the dissolved gas content in the plant in operation: mu.L/L
TABLE 2 gas generation for different fault types
| Type of failure | Gas of main character | Gas of secondary character |
| Oil superheating | CH4，C2H4 | H2，C2H6 |
| Oil and paper superheating | CH4，C2H4，CO | H2，C2H6，CO2 |
| Partial discharge in oiled paper insulation | H2，CH4，CO | C2H4，C2H6，C2H2 |
| Spark discharge in oil | H2，C2H2 | |
| Electric arc in oil | H2，C2H2，C2H4 | CH4,C2H6 |
| Electric arc in oil and paper | H2，C2H2，C2H4，CO | CH4,C2H6，CO |
TABLE 3 coding rules by three-ratio method
TABLE 4 Fault type determination method
Claims (1)
1. Gas on-line measuring device among power transformer gas relay, characterized by: an automatic gas taking unit, a gas detection unit, an intelligent comprehensive analysis unit and a communication control unit are integrated in the metal outer cover, and all the units are connected in sequence;
the automatic air-taking unit comprises an air pump, an automatic exhaust valve, an air inlet, an exhaust hole and a controller, and the air pump is connected to the bottom of the automatic air-taking unit; the automatic exhaust valve is connected to the automatic gas taking unit and is connected to the gas detection unit; the automatic air inlet valve is connected to the automatic air taking unit and is connected with the gas relay through a metal pipe; the automatic gas taking unit is connected with the gas relay and the gas detection unit through a metal hose, and the gas detection unit is connected with the intelligent comprehensive analysis unit through a cable; the intelligent comprehensive analysis unit is connected with the communication control unit through a cable;
the automatic gas taking unit is connected with a gas relay through a pipeline, a one-way exhaust valve K1 is arranged between the automatic gas taking unit and the gas relay, and the other end of the gas relay is connected with a transformer through a pipeline;
the output end of the automatic gas taking unit is connected with the input end of the gas detection unit through a pipeline;
a chromatographic sensor is installed in the gas detection unit, and the gas detection unit is connected to the input end of the intelligent analysis unit through a cable;
the intelligent comprehensive analysis unit is connected to the input end of the communication control unit through a cable; the communication control unit is remotely connected with the main control room through optical fibers;
the air pump is provided with an air inlet and an air outlet; the air inlet can be automatically opened and closed, and the air inlet is also provided with an exhaust hole and is connected with a gas detection unit through an exhaust valve;
the communication control unit comprises a control panel, a storage device, a cable and a power line; the communication control unit is connected with the gas detection unit through a cable; the power supply of a 220V alternating current power supply is realized through a power line; the control panel is arranged on the outer surface of the communication control unit;
the control panel comprises an indicator light and a buzzer and is used for distinguishing different judgment results; the indicator light adopts an LED, and the buzzer is arranged on the surface of the control panel;
the control panel also comprises keys.
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| CN202021353177.7U CN213397847U (en) | 2020-07-11 | 2020-07-11 | Gas on-line detection device in power transformer gas relay |
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| CN202021353177.7U CN213397847U (en) | 2020-07-11 | 2020-07-11 | Gas on-line detection device in power transformer gas relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111811894A (en) * | 2020-07-11 | 2020-10-23 | 国网辽宁省电力有限公司电力科学研究院 | Gas on-line detection method and device in power transformer gas relay |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811894A (en) * | 2020-07-11 | 2020-10-23 | 国网辽宁省电力有限公司电力科学研究院 | Gas on-line detection method and device in power transformer gas relay |
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