CN113960099A - GIT's environment-friendly mist pyrolysis and heat dissipation test device - Google Patents
GIT's environment-friendly mist pyrolysis and heat dissipation test device Download PDFInfo
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- CN113960099A CN113960099A CN202111236088.3A CN202111236088A CN113960099A CN 113960099 A CN113960099 A CN 113960099A CN 202111236088 A CN202111236088 A CN 202111236088A CN 113960099 A CN113960099 A CN 113960099A
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 29
- 238000000197 pyrolysis Methods 0.000 title claims description 7
- 239000003595 mist Substances 0.000 title description 2
- 238000013021 overheating Methods 0.000 claims abstract description 19
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 238000005979 thermal decomposition reaction Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a GIT (gas in gas) environment-friendly mixed gas overheating decomposition and heat dissipation test device which comprises a test system, a discharge system, a heating system and a gas circulation system, wherein a gas storage tank of the test system realizes the circular flow of a gas medium through the gas circulation system, the heating system comprises a heat source, a temperature sensor and a temperature controller, the heat source, the temperature sensor and the temperature controller are arranged in the gas storage tank, the temperature sensor acquires the real-time temperature in the gas storage tank and then transmits the real-time temperature to the temperature controller to judge whether the heat source needs to be opened or closed, and the discharge system is positioned outside the gas storage tank and provides alternating current for the heat source. The invention provides a GIT environment-friendly mixed gas overheating decomposition and heat dissipation test device which can better simulate the environment-friendly mixed gas overheating decomposition process in the GIT.
Description
Technical Field
The invention relates to the technical field of gas insulated transformers, in particular to a GIT (gas insulated switchgear) environment-friendly type mixed gas overheating decomposition and heat dissipation test device.
Background
The gas-insulated transformer is a dry-type transformer, can ensure good power supply quality and reduce line loss, and has excellent performance and higher use degree. The conventional gas-insulated transformer uses SF6 gas as an insulating and cooling medium, so it is called SF6 gas-insulated transformer, but since SF6 gas greenhouse effect index (GWP) is 23500 times of CO2, it is not favorable for environmental protection and is gradually discarded by the market. The C4F7N/CO2 mixed gas has excellent environmental protection performance, the GWP value is only 2090, the mixed gas is incombustible, can be compatible with most of electrical equipment materials, and the insulating capability of the mixed gas reaches more than 2 times of SF6, so the mixed gas is gradually noticed and applied to the electrical field.
Therefore, it is urgently needed by those skilled in the art to study the feasibility of applying the C4F7N/CO2 mixed gas to a Gas Insulated Transformer (GIT) instead of SF6, and particularly to analyze the thermal decomposition and heat dissipation of the C4F7N/CO2 mixed gas in the GIT.
Disclosure of Invention
The invention provides a GIT (gas insulated switchgear) environment-friendly type mixed gas overheating decomposition and heat dissipation test device which is used for simulating the thermal decomposition and heat dissipation processes of a C4F7N/CO2 mixed gas in a Gas Insulated Transformer (GIT) so as to ensure the normal operation of equipment and the safety of personnel.
The invention provides a GIT (gas in process of thermal decomposition) environment-friendly mixed gas overheating decomposition and heat dissipation test device which is characterized by comprising a test system, a discharge system, a heating system and a gas circulation system, wherein the test system comprises a test system body and a test system body; the test system comprises a gas storage tank, and the gas circulation system is connected with the gas storage tank and used for realizing the circular flow of a gas medium in the gas storage tank; the heating system comprises a heat source and a temperature sensor which are arranged in an air storage tank, the heat source is connected with a temperature controller arranged outside the air storage tank, and the temperature controller is used for receiving a temperature signal sent by the temperature sensor and controlling the on or off of the heat source according to a preset temperature threshold value; the discharge system is located outside the air storage tank and provides alternating current for the heat source.
Preferably, two through holes are formed in the side wall of the gas storage tank, the gas circulation system comprises a communicating pipe with two ends opened, and two ends of the communicating pipe are respectively connected with the through holes in a sealing mode.
Preferably, the gas circulation system further comprises a circulation pump disposed on the communication pipe.
Preferably, an air valve is arranged on the communicating pipe.
Preferably, the number of the air valves is two, and the two air valves are respectively arranged near openings at two ends of the communicating pipe.
Preferably, the thermostat controls the heat source to be turned on or off through a relay.
Preferably, the number of the temperature sensors is two, and the two temperature sensors are respectively positioned on the side walls of the heat source and the air storage tank.
Preferably, the air pressure gauge further comprises an air pressure gauge positioned at the upper end of the air storage tank.
Preferably, the gas storage tank comprises a body and an upper end cover, and the body is connected with the upper end cover in a sealing manner through a fastener.
Preferably, the upper edge of the body is provided with a flange protruding outwards in the radial direction, a through hole is formed in the position where the flange is aligned with the upper end cover, the fastener is a pull rod with threads at two ends, and the pull rod sequentially penetrates through the through holes in the body and the upper end cover and then is fixed by a nut.
According to the technical scheme, the invention has the following advantages:
the embodiment of the invention provides a GIT environment-friendly type mixed gas overheating decomposition and heat dissipation test device which comprises a test system, a discharge system, a heating system and a gas circulation system. The heating system comprises a heat source, a temperature sensor and a temperature controller, and the temperature sensor can be used for monitoring the working temperature of the testing system in real time in an experiment. Specifically, the temperature sensor is used for collecting temperature information in real time and transmitting the temperature information to the temperature controller, the temperature controller is used for converting the information of the temperature sensor and displaying the real-time temperature of the test system after receiving the information of the temperature sensor, and the temperature controller is also used as an adjusting switch and can adjust the on or off of a heat source according to a preset temperature threshold value in a test, so that the temperature required in the test process is controlled. The discharge system provides alternating current for the heat source to heat the heat source; the gas circulation system can realize the circulation flow of the gas medium in the test system, realize the process simulation of the circulation heat dissipation condition in the actual equipment GIT, and provide more accurate research data for the thermal decomposition and heat dissipation process of the GIT.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of a GIT testing apparatus for overheating decomposition and heat dissipation of an environment-friendly mixed gas according to an embodiment of the present invention.
1-discharge system, 2-heating system, 3-relay, 4-barometer, 5-heat source, 6, 7-temperature sensor, 8-circulating pump, 9-gas valve, 10-gas circulating system, 11-communicating pipe, 12-temperature controller, 13-body, 14-upper end cover, 15-flange, 16-pull rod, 17-nut, 18-testing system, 19-gas storage tank.
Detailed Description
The embodiment of the invention provides a GIT environment-friendly type mixed gas overheating decomposition and heat dissipation test device which is used for simulating the conditions of gas medium heating decomposition and heat conduction so as to solve the problems of equipment damage and other potential safety hazards of the GIT in the actual operation process.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below 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.
In an electric power system, a gas insulating medium is applied to electric insulating equipment on a large scale, the gas insulating medium has small conductivity and good self-recovery performance compared with other liquid media, fewer pollutants are generated under the action of electric arcs and corona, the electric strength of the gas insulating medium in a uniform field and a non-uniform field is increased along with the increase of pressure intensity, and the insulating strength in the electric equipment can be flexibly controlled by controlling the pressure intensity. The inventor finds that in the GIT, when the transformer works under the normal operation condition, the temperature rise can be generated inside the equipment due to the heat generated by the current heat effect and the hysteresis eddy current loss; meanwhile, in the operation process of the GIT, due to the aging of metal or insulating materials, the local overheating phenomenon can occur inside the equipment, the physical and chemical properties of materials inside the electrical equipment can be influenced by the change of the temperatures, the equipment can be damaged seriously, and even casualties are caused.
Referring to fig. 1, fig. 1 shows an environment-friendly type gas mixture pyrolysis and heat dissipation testing apparatus for GIT according to an embodiment of the present invention, which includes a testing system 18, a discharging system 1, a heating system 2, and a gas circulation system 10. Wherein the testing system 18 comprises a gas storage tank 19, in the embodiment, the gas storage tank 19 is filled with a mixed gas of C4F7N/CO2 as an insulating gas medium for testing. The gas circulation system 10 is connected to the gas tank 19 at both ends thereof for circulating the gas medium. The heating system 2 comprises a temperature sensor 6, a heat source 5 and a temperature controller 12, the gas in the gas storage tank 19 is heated by the heat source 5, the temperature of the heat source 5 is monitored online in real time by the temperature sensor 6, the measured real-time temperature is converted into an electric signal and transmitted to the temperature controller 12 through a signal line, the temperature controller 12 receives the information of the temperature sensor 6 and converts the information into the real-time temperature of the testing system 18, the temperature controller 12 is further used as an adjusting switch for adjusting the on or off of the heat source 5 according to a preset temperature threshold value in the test, so as to control the temperature in the test process, in the embodiment, the specific temperature threshold value is set to be 400 ℃, when the temperature of the heat source 5 reaches 400 ℃, the temperature controller 12 receives the signal of the temperature sensor 6 and then controls the start of the relay 3, so as to maintain the temperature of the heat source 5 at 400 ℃. The maximum temperature range of the heat source 5 of the device of the embodiment can reach 500 ℃. The discharge system 1 is connected with the heat source 5 and provides alternating current for the heat source 5, and the heat source simulates local overheating faults through the change of the alternating current.
In this embodiment, the gas circulation system 10 is the communicating pipe 11 with two open ends, two through holes are correspondingly formed in the side wall of the gas storage tank 19, and two ends of the communicating pipe 11 are respectively and hermetically installed in the two through holes to form a flow channel for a gas medium, so that the gas medium can circularly flow, the local overheating condition in the actual equipment GIT can be better simulated, and the research data is more accurate.
The communicating pipe 11 is provided with air valves 9 at the attachments at both ends thereof for controlling the opening and closing of the circulation passage as required during the test. The circulation pump 8 is disposed in the connection pipe 11 for providing power for the circulation flow of the gas during the circulation cooling process of the gas inside the GIT apparatus, and at the same time, the magnitude of the output power can be changed to simulate the flow rate of the gas inside the GIT apparatus. In this embodiment, the flow rate of gas inside the GIT equipment can be adjusted and obtained by the circulation pump 8, the real-time temperature of the gas insulation medium can be monitored on line by the temperature sensor 6, the heat dissipation condition of the gas insulation medium can be monitored by changing the temperature of the local overheating source and the temperature of the gas insulation medium, and the corresponding relationship between the circulation flow rate and the heat dissipation temperature can be further obtained by obtaining the flow rate data and the temperature change data for the research on the thermal decomposition and heat dissipation process of the actual GIT.
Further, in the test simulation process, a temperature sensor 7 is also arranged on the inner wall of the gas storage tank 19 and used for acquiring the temperature inside the gas storage tank 19 to monitor the test conditions, correspondingly, a temperature sensor 6 on the inner wall of the gas storage tank 19 is also connected with a temperature controller 12, the detected real-time temperature is converted into temperature information and transmitted to the temperature controller 12 through a signal line, so that the temperature controller 12 can simultaneously display the temperature information inside the gas storage tank 19, and the influence condition of the gas circulation cooling speed on the system heat dissipation can be acquired according to the acquired temperature information on the inner wall of the gas storage tank 19.
During the test, in order to strictly control the temperature of the internal environment of the air reservoir 19, the thermostat 12 switches the heating of the heat source on or off through the relay 3. Specifically, the relay 3 is located on the circuit of the discharge system 1 and connected with the heat source 5, the temperature controller 12 is connected with the relay 3, the temperature sensor 6 on the heat source 5 transmits a heat source temperature signal to the temperature controller 12 and displays the heat source temperature signal on the display screen of the temperature controller 12, and at the moment, the temperature controller 12 can control the relay 3 according to the preset temperature so as to control the on-off of the circuit of the discharge system 1 and achieve the on-off of heating of the heat source 5.
When the experimental gas is filled, in order to monitor the air pressure inside the air storage tank 19 and also monitor the air pressure of the air storage tank 19 in the experimental process, and further judge whether the air storage tank 19 has faults such as air leakage, a barometer 4 is further arranged at the upper end of the air storage tank 19, and the barometer 4 is communicated with the inside of the air storage tank 19.
In this embodiment, the gas storage tank 19 comprises a body 13 and a detachable upper end cover 14 located at the upper end of the body, that is, the gas storage tank 19 can be opened according to the test requirements, thereby facilitating the maintenance work of the operator. The upper end cover 14 is connected with the body 13 in a sealing and detachable mode through a fastener. Specifically, the body 13 is provided with a flange 15 protruding radially outward on the upper edge thereof, the flange 15 is provided with a through hole, the upper end cover is also provided with the same through hole at the position aligned with the through hole, the fastener is a pull rod 16 with threads at two ends, the pull rod 16 can sequentially pass through the through holes on the flange 15 and the upper end cover 14 and is fastened through a nut 17, so that the body 13 is stably connected with the upper end cover 14. The connection fixing structure is simple and easy to operate while realizing stable connection, and greatly lightens the workload of operators. Of course, it should be understood by those skilled in the art that the fixing connection manner of the body 13 and the upper end cap 14 is not limited to the above-mentioned manner, and other fixing structures commonly found in the art are also within the protection scope of the present invention.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A GIT environment-friendly type mixed gas overheating decomposition and heat dissipation test device is characterized by comprising a test system, a discharge system, a heating system and a gas circulation system;
the test system comprises a gas storage tank, and the gas circulation system is connected with the gas storage tank and used for realizing the circular flow of a gas medium in the gas storage tank;
the heating system comprises a heat source and a temperature sensor which are arranged in an air storage tank, the heat source is connected with a temperature controller arranged outside the air storage tank, and the temperature controller is used for receiving a temperature signal sent by the temperature sensor and controlling the on or off of the heat source according to a preset temperature threshold value;
the discharge system is located outside the air storage tank and provides alternating current for the heat source.
2. The GIT testing device for the environment-friendly type mixed gas pyrolysis and heat dissipation of the gas container as claimed in claim 1, wherein two through holes are opened on a side wall of the gas container, the gas circulation system comprises a communicating pipe with two open ends, and two ends of the communicating pipe are respectively connected with the through holes in a sealing manner.
3. The GIT device for testing the overheating decomposition and heat dissipation of the environment-friendly mixed gas, as recited in claim 2, wherein the gas circulation system further comprises a circulation pump disposed on the connection pipe.
4. The GIT environment-friendly type mixed gas pyrolysis and heat dissipation test device as claimed in claim 2 or 3, wherein a gas valve is provided on the communicating pipe.
5. The GIT environment-friendly type mixed gas overheating decomposition and heat dissipation test device as set forth in claim 4, wherein the number of said gas valves is two, and said two gas valves are respectively disposed near openings of both ends of said communicating pipe.
6. The GIT testing apparatus for the environmentally friendly mixed gas pyrolysis and heat dissipation of claim 1, wherein the thermostat controls the heat source to be turned on or off through a relay.
7. The GIT apparatus for testing overheating decomposition and heat dissipation of mixed gas in environment protecting mode according to claim 1, wherein the number of said temperature sensors is two, and said two temperature sensors are respectively located on the side walls of the heat source and the gas tank.
8. The GIT testing apparatus for the overheating decomposition and heat dissipation of mixed gas in accordance with claim 1, further comprising a gas pressure gauge installed on said gas tank.
9. The GIT environment-friendly type mixed gas pyrolysis and heat dissipation test device as claimed in claim 1, wherein the gas storage tank comprises a body and an upper end cover, and the body and the upper end cover are hermetically connected through a fastening member.
10. The GIT testing device for the overheating decomposition and heat dissipation of the environment-friendly mixed gas, as recited in claim 9, wherein a flange protruding outward in a radial direction is provided at an upper edge of the body, a through hole is provided at an alignment position of the flange and the upper end cap, the fastening member is a pull rod having threads at both ends, and the pull rod is fixed by a nut after sequentially passing through the through holes of the body and the upper end cap.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111236088.3A CN113960099A (en) | 2021-10-22 | 2021-10-22 | GIT's environment-friendly mist pyrolysis and heat dissipation test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111236088.3A CN113960099A (en) | 2021-10-22 | 2021-10-22 | GIT's environment-friendly mist pyrolysis and heat dissipation test device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546887A (en) * | 2016-11-04 | 2017-03-29 | 国网山东省电力公司电力科学研究院 | A kind of SF6Decompose simulating experimental system and its emulation experiment method |
| CN110568326A (en) * | 2019-09-02 | 2019-12-13 | 国网甘肃省电力公司电力科学研究院 | Electric-thermal combined aging and gas decomposition test device and application method |
| CN111693836A (en) * | 2020-06-30 | 2020-09-22 | 国网电力科学研究院武汉南瑞有限责任公司 | Cable termination silicon oil electricity heat moisture unites ageing tests platform |
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2021
- 2021-10-22 CN CN202111236088.3A patent/CN113960099A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546887A (en) * | 2016-11-04 | 2017-03-29 | 国网山东省电力公司电力科学研究院 | A kind of SF6Decompose simulating experimental system and its emulation experiment method |
| CN110568326A (en) * | 2019-09-02 | 2019-12-13 | 国网甘肃省电力公司电力科学研究院 | Electric-thermal combined aging and gas decomposition test device and application method |
| CN111693836A (en) * | 2020-06-30 | 2020-09-22 | 国网电力科学研究院武汉南瑞有限责任公司 | Cable termination silicon oil electricity heat moisture unites ageing tests platform |
Non-Patent Citations (1)
| Title |
|---|
| 范庆涛: "六氟化硫气体过热性分解实验系统研制及实验方法研究", 《中国优秀硕士学位全文数据库 工程科技Ⅱ辑》, no. 3, 15 March 2014 (2014-03-15), pages 042 - 279 * |
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