CN219456374U - Environment-friendly insulating gas insulating property experimental device - Google Patents
Environment-friendly insulating gas insulating property experimental device Download PDFInfo
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- CN219456374U CN219456374U CN202223393962.7U CN202223393962U CN219456374U CN 219456374 U CN219456374 U CN 219456374U CN 202223393962 U CN202223393962 U CN 202223393962U CN 219456374 U CN219456374 U CN 219456374U
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Abstract
The utility model relates to the technical field of electric insulation experiments, in particular to an environment-friendly insulation gas insulation performance experiment device; the experimental device comprises an experimental device, a gas supply unit, a humidifying unit and a breakdown experimental unit, wherein a closed experimental cavity is formed in the experimental device, and a gas inlet communicated with the experimental cavity is formed in the surface of the experimental device; the gas supply unit is connected with the gas inlet, the humidifying unit is connected with the experiment device, the breakdown experiment unit comprises a voltage supply module, a pressure measurement module and two electrodes, when an environment-friendly insulating gas insulation performance experiment is carried out, the breakdown voltage corresponding to the environment-friendly insulating gas with different micro water concentrations can be obtained by changing the micro water concentration of the environment-friendly insulating gas, the relation between the breakdown voltage and the micro water concentration is further determined, reliable reference is provided for the establishment of the micro water content and the insulation performance of the environment-friendly insulating gas, and the state monitoring and the operation and maintenance of the gas insulation equipment are facilitated.
Description
Technical Field
The utility model relates to the technical field of electric insulation experiments, in particular to an environment-friendly insulating gas insulation performance experiment device.
Background
SF 6 (Sulfur hexafluoride) is widely used in gas-insulated equipment due to its good insulating and arc extinguishing properties, but SF 6 Is an extremely strong greenhouse gas. In order to construct a clean low-carbon energy system, a plurality of scholars begin to search for a novel environment-friendly insulating gas with good physicochemical properties, insulating properties and arc extinguishing properties.
The most environment-friendly insulating gas studied at present is mainly C 4 F 7 N、C 5 F 10 O、C 6 F 12 O, HFO-1234ze (E), and its insulating properties, decomposition properties, etc. have been studied. For the conventional non-arc extinguishing air chamber used at present, the maximum water content which can be tolerated in the application is 1000 mu L/L, when the micro water content is too high, the insulation performance of the environment-friendly insulating gas can be greatly influenced, and the novel environment-friendly insulating gas and the SF widely used at present 6 The nature of the gases differs, and the influence of the micro water content on the insulating property is not clear, so that the influence of the micro water content on the environment-friendly insulating gas property is necessary to be studied.
Based on the above, an experimental device for testing the influence of the micro water content on the insulating performance of the environment-friendly insulating gas needs to be designed, so that the relation between the micro water content in the environment-friendly insulating gas and the insulating performance of the environment-friendly insulating gas is established, and a reference is provided for the state monitoring and the operation and maintenance of the environment-friendly insulating gas equipment.
Disclosure of Invention
The utility model aims to overcome the technical defects, and provides an environment-friendly insulating gas insulating property experimental device which solves the technical problem that the relation between the micro water content and the environment-friendly insulating gas insulating property is difficult to confirm in the prior art.
In order to achieve the technical purpose, the technical scheme of the utility model provides an environment-friendly insulating gas insulation performance experimental device, which comprises:
the experimental device is characterized in that a closed experimental cavity is arranged in the experimental device, and a gas inlet communicated with the experimental cavity is formed in the surface of the experimental device;
the gas supply unit is connected with the gas inlet and is used for introducing background gas and environment-friendly insulating gas to be tested into the experiment cavity;
the humidifying unit is connected with the experiment device and used for humidifying the environment-friendly insulating gas in the experiment cavity and measuring the humidity of the environment-friendly insulating gas;
breakdown experiment unit, breakdown experiment unit is including supplying pressure module, pressure measurement module and two electrodes, two the inter-electrode interval set up in the experiment intracavity, two form insulating clearance between the electrode, supply pressure module with pressure measurement module with two the electrode is connected, supply pressure module to be used for to two the electrode provides the breakdown voltage that breaks down insulating clearance, pressure measurement module is used for two the voltage between the electrodes is measured.
Optionally, the humidification unit includes circulating pipe, driving pump and humidifier, the circulating pipe is provided with the inlet end and gives vent to anger the end, the inlet end with give vent to anger the end all with experimental chamber intercommunication, driving pump with the humidifier all install in the circulating pipe, driving pump is used for the drive the gas in experimental chamber by the inlet end gets into the circulating pipe, and warp give vent to anger the end and let out, the humidifier is used for carrying out the humidification to the gas that flows through.
Optionally, the humidifying unit further includes a first micro-water meter, and the first micro-water meter is installed on the circulating pipe and located on one side of the humidifier, which is close to the air outlet end, and is used for measuring the humidity of the air which is discharged through the air outlet end.
Optionally, the humidifying unit further comprises a second micro water meter, wherein the second micro water meter is arranged on the circulating pipe and is positioned on one side of the driving pump close to the air inlet end, and is used for measuring the humidity of the air entering the circulating pipe from the air inlet end.
Optionally, the humidifying unit further comprises a flowmeter, and the flowmeter is installed on the circulating pipe and is used for measuring the flow of the gas in the circulating pipe.
Optionally, the humidifier includes a jar body, heat supply module and water storage module, the inside of jar body is provided with the humidification chamber, water storage module set up in the humidification intracavity is used for storing the water, heat supply module with install in the jar body and be used for right water that water storage module's water supplies heat, the surface of jar body is provided with air inlet and gas outlet, the circulating pipe with the air inlet with the gas outlet is connected, so that the gas of circulating pipe is followed the air inlet gets into the humidification chamber, and follows the gas outlet lets out.
Optionally, the water storage module comprises a plurality of water storage tanks, each water storage tank is arranged at intervals and is fixed on the side wall of the humidification cavity, each water storage tank is arranged in a staggered mode and surrounds to form a serpentine channel, and the air inlet and the air outlet are located at two ends of the serpentine channel.
Optionally, the heat supply module comprises a heat exchange coil coiled on the surface of the tank body and used for supplying heat to each water storage tank.
Optionally, the voltage supply module includes power, voltage regulator, transformer and protection resistance, the voltage regulator with the power electricity is connected, the voltage input of transformer with the voltage regulator electricity is connected, the voltage output of transformer with two the electrode is connected, protection resistance is connected in the transformer with one of them on the connecting wire of electrode.
Optionally, the pressure measuring module comprises a voltmeter and a capacitive voltage divider, wherein the capacitive voltage divider is connected with the two electrodes in parallel, and the voltmeter is electrically connected with the capacitive voltage divider and is used for measuring the voltage of the capacitive voltage divider.
Compared with the prior art, the environment-friendly insulating gas insulating property experimental device provided by the utility model has the beneficial effects that: through setting up experimental apparatus, gas supply unit, humidification unit and puncture experimental unit, the inside of experimental apparatus is provided with airtight experiment chamber, the surface of experimental apparatus is provided with the gas inlet that communicates with experiment chamber; the gas supply unit is connected with the gas inlet, background gas and environment-friendly insulating gas to be tested can be introduced into the experiment cavity, the humidifying unit is connected with the experiment device, the environment-friendly insulating gas in the experiment cavity can be humidified, the humidity of the environment-friendly insulating gas can be measured, the breakdown experiment unit comprises a voltage supply module, a pressure measuring module and two electrodes, the two electrodes are arranged in the experiment cavity at intervals to form an insulating gap, when the environment-friendly insulating gas insulating property experiment is carried out, the background gas and the environment-friendly insulating gas to be tested are introduced into the experiment cavity through the gas supply unit, the environment-friendly insulating gas in the experiment cavity is humidified by the humidifying unit, the environment-friendly insulating gas with a certain micro water concentration is obtained, the voltage supply module supplies voltage to the two electrodes and gradually pressurizes the environment-friendly insulating gas, the breakdown voltage between the two electrodes can be obtained through changing the micro water concentration of the environment-friendly insulating gas and repeating the experiment process, and then the breakdown voltage corresponding to the environment-friendly insulating gas with different micro water concentrations can be obtained, and the relation between the breakdown voltage and the micro water concentration can be determined, and reliable reference can be provided for the real and the insulation property.
Drawings
Fig. 1 is a schematic structural diagram of an environment-friendly insulating gas insulation performance experimental device provided by an embodiment of the utility model.
Fig. 2 is a cross-sectional view of a humidifier of the environment-friendly insulating gas insulation performance experimental device according to an embodiment of the present utility model.
Fig. 3 is a flowchart of an environment-friendly insulating gas insulation performance experiment method provided by an embodiment of the utility model.
Wherein, each reference sign in the figure:
10-laboratory 11-laboratory cavity 12-gas inlet
20-gas supply unit 21-gas supply pipe 22-first control valve
23-barometer 30-humidification unit 31-circulation pipe
32-drive pump 33-humidifier 34-first micro water meter
35-second micro water meter 36-flowmeter 37-second control valve
38-third control valve 40-breakdown experiment unit 41-voltage supply module
42-pressure measuring module 43-electrode 311-air inlet end
312-air outlet end 331-tank 332-water storage module
333-heating module 411-power source 412-voltage regulator
413-transformer 414-protection resistor 421-voltmeter
422-capacitive divider 431-insulating gap 3311-humidification chamber
3312-air inlet 3313-air outlet 3314-water inlet
3315-water outlet 3321-water storage tank 3322-serpentine path
3331-heat exchange coil.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The utility model provides an environment-friendly insulating gas insulating property experimental device, which comprises an experiment device 10, a gas supply unit 20, a humidifying unit 30 and a breakdown experiment unit 40, wherein a closed experiment cavity 11 is arranged in the experiment device 10, and a gas inlet 12 communicated with the experiment cavity 11 is arranged on the surface of the experiment device 10; the gas supply unit 20 is connected with the gas inlet 12 and is used for introducing background gas and environment-friendly insulating gas to be tested into the experiment cavity 11; the humidifying unit 30 is connected with the experiment device 10, and is used for humidifying the environment-friendly insulating gas in the experiment cavity 11 and measuring the humidity of the environment-friendly insulating gas; the breakdown experiment unit 40 includes a voltage supply module 41, a voltage measurement module 42 and two electrodes 43, the two electrodes 43 are arranged in the experiment cavity 11 at intervals, an insulation gap 431 is formed between the two electrodes 43, the voltage supply module 41 and the voltage measurement module 42 are connected with the two electrodes 43, the voltage supply module 41 is used for providing breakdown voltages of the breakdown insulation gap 431 for the two electrodes 43, and the voltage measurement module 42 is used for measuring voltages between the two electrodes 43.
Specifically, the experimental device is provided with an experimental device 10, a gas supply unit 20, a humidifying unit 30 and a breakdown experimental unit 40, wherein a closed experimental cavity 11 is arranged in the experimental device 10, and a gas inlet 12 communicated with the experimental cavity 11 is arranged on the surface of the experimental device 10; the gas supply unit 20 is connected to the gas inlet 12 and can supply N to the experiment chamber 11 2 、CO 2 Background gas such as air and the like and environment-friendly insulating gas to be tested, the humidifying unit 30 is connected with the experiment device 10, can humidify the environment-friendly insulating gas of the experiment cavity 11, can measure the humidity of the environment-friendly insulating gas, and the breakdown experiment unit 40 comprises a voltage supply unitThe module 41, the pressure measurement module 42 and the two electrodes 43, the two electrodes 43 are arranged in the experiment cavity 11 at intervals to form an insulation gap 431, when an environment-friendly insulation gas insulation performance experiment is carried out, the gas supply unit 20 is used for supplying background gas and environment-friendly insulation gas to be tested to the experiment cavity 11, the humidifying unit 30 is used for humidifying the environment-friendly insulation gas in the experiment cavity 11 to obtain environment-friendly insulation gas with a certain micro water concentration, the pressure measurement module 41 is used for providing voltage for the two electrodes 43 and gradually pressurizing the voltage, the pressure measurement module 42 is used for obtaining breakdown voltage between the two electrodes 43 when the two electrodes 43 break down the insulation gap 431, the breakdown voltage corresponding to the environment-friendly insulation gas with different micro water concentrations can be obtained by changing the micro water concentration of the environment-friendly insulation gas and repeating the experiment process, so that a graph between the breakdown voltage and the micro water concentration is established, and a relation between the breakdown voltage and the micro water concentration is determined through the graph, and reliable reference is provided for the determination of the micro water content and insulation performance of the environment-friendly insulation gas.
In this embodiment, the gas supply unit 20 includes a gas supply pipe 21, a first control valve 22 and a barometer 23, one end of the gas supply pipe 21 is connected to the gas inlet 12, the other end of the gas supply pipe 21 is used for connecting a gas supply device, the first control valve 22 and the barometer 23 are both installed on the gas supply pipe 21, the first control valve 22 is used for controlling on-off of the gas supply pipe 21, the barometer 23 is used for monitoring the gas pressure value in the gas supply pipe 21, the first control valve 22 is used for controlling on-off of the gas supply pipe 21, and when the first control valve 22 is opened, the gas supply device can introduce a specific proportion of background gas and environment-friendly insulating gas into the experiment cavity 11 through the gas supply pipe 21.
It can be appreciated that the humidifying unit 30 can humidify the environment-friendly insulating gas by directly introducing steam into the experiment chamber 11, and can measure the humidity of the environment-friendly insulating gas in the experiment chamber 11 by arranging a hygrometer in the experiment chamber 11.
In this embodiment, the voltage supply module 41 includes a power source 411, a voltage regulator 412, a transformer 413 and a protection resistor 414, the voltage regulator 412 is electrically connected with the power source 411, a voltage input end of the transformer 413 is electrically connected with the voltage regulator 412, a voltage output end of the transformer 413 is connected with the two electrodes 43, and the protection resistor 414 is connected to a connection line between the transformer 413 and one of the electrodes 43. The voltage measuring module 42 comprises a voltmeter 421 and a capacitive voltage divider 422, the capacitive voltage divider 422 is connected in parallel with the two electrodes 43, and the voltmeter 421 is electrically connected with the capacitive voltage divider 422 and is used for measuring the voltage of the capacitive voltage divider 422. The voltage input by the power supply 411 is transformed by the transformer 413 and then is transmitted to the two electrodes 43, the voltage regulator 412 gradually increases the voltage between the two electrodes 43 by regulating the voltage until the two electrodes 43 break down the insulation gap 431, and the voltmeter 421 measures the voltage of the capacitive voltage divider 422, so as to obtain the breakdown voltage of the two electrodes 43.
In this embodiment, the humidifying unit 30 includes a circulation pipe 31, a driving pump 32 and a humidifier 33, the circulation pipe 31 is provided with an air inlet end 311 and an air outlet end 312, the air inlet end 311 and the air outlet end 312 are both communicated with the experiment chamber 11, the driving pump 32 and the humidifier 33 are both installed on the circulation pipe 31, the driving pump 32 is used for driving the gas of the experiment chamber 11 to enter the circulation pipe 31 from the air inlet end 311 and be discharged through the air outlet end 312, and the humidifier 33 is used for humidifying the gas flowing through. Specifically, after the background gas and the environment-friendly insulating gas are supplied by the gas supply unit 20, the driving pump 32 is started to drive the background gas and the environment-friendly insulating gas to enter the circulating pipe 31 from the air inlet end 311 and finally to be discharged to the experiment cavity 11 again from the air outlet end 312, and when the gas flows through the humidifier 33, the humidifier 33 can be used for humidifying, so that the environment-friendly insulating gas and the micro-water can be fully mixed. In this embodiment, after the humidifying unit 30 detects that the micro water content of the environment-friendly insulating gas is stable, it can be explained that the humidifying of all the environment-friendly insulating gas in the experiment cavity 11 is completed, that is, the driving pump 32 can be turned off, and a voltage breakdown experiment is performed.
In this embodiment, the humidifying unit 30 further includes a first micro water meter 34, wherein the first micro water meter 34 is installed on the circulation pipe 31 and located on one side of the humidifier 33 near the air outlet end 312, for measuring the humidity of the air flowing out through the air outlet end 312. Specifically, by installing the first micro water meter 34 on the side of the humidifier 33 close to the air outlet end 312, the humidity of the air flowing out from the air outlet end 312 can be measured, so as to obtain accurate measurement of the micro water content of the air flowing out, and when the micro water content of the air flowing out is stable, the driving pump 32 can be turned off.
In this embodiment, the humidifying unit 30 further includes a second micro water meter 35, and the second micro water meter 35 is mounted on the circulation pipe 31 and located at a side of the driving pump 32 near the air inlet end 311 for measuring the humidity of the gas entering the circulation pipe 31 from the air inlet end 311. Specifically, by installing the second micro water meter 35 on the side of the driving pump 32 close to the air inlet end 311, the humidity of the air entering the air inlet end 311 can be measured, so as to obtain an accurate measurement of the micro water content of the air entering, the measured value of the second micro water meter 35 can be compared with the measured value of the first micro water meter 34, the humidifying efficiency of the humidifying unit 30 can be obtained, and after the measured value of the second micro water meter 35 is stable, the humidification of the air can be stopped.
In this embodiment, the humidification unit 30 further includes a flow meter 36, and the flow meter 36 is mounted on the circulation tube 31 for measuring the flow rate of the gas in the circulation tube 31. Specifically, the flow meter 36 can monitor the flow of gas in the circulation tube 31 in real time, thereby facilitating the adaptive adjustment of the power driving the pump 32.
In this embodiment, the humidifying unit 30 further includes a second control valve 37 and a third control valve 38, where the second control valve 37 and the third control valve 38 are both installed on the circulation pipe 31 for controlling on-off of the circulation pipe 31, the second control valve 37 is located at a side of the second micro-water meter 35 near the water inlet end, and the third control valve 38 is located at a side of the first micro-water meter 34 near the air outlet end 312.
In this embodiment, the humidifier 33 includes a tank 331, a water storage module 332 and a heat supply module 333, a humidification chamber 3311 is provided in the tank 331, the water storage module 332 is disposed in the humidification chamber 3311 and is used for storing water, the heat supply module 333 is disposed in the tank 331 and is used for supplying heat to the water of the water storage module 332, an air inlet 3312 and an air outlet 3313 are provided on the surface of the tank 331, and the circulation pipe 31 is connected with the air inlet 3312 and the air outlet 3313, so that the gas of the circulation pipe 31 enters the humidification chamber 3311 from the air inlet 3312 and is discharged from the air outlet 3313. Specifically, the heat supply module 333 heats the water storage module 332 to accelerate vaporization of the water body in the pure water module to form micro water, the gas in the circulation pipe 31 enters the humidification chamber 3311 through the air inlet 3312 to be mixed with the micro water, so as to humidify the gas, the humidified gas is led out from the air outlet 3313 to the circulation pipe 31, finally flows back to the experiment chamber 11 from the air outlet end 312, and the micro water content of the gas in the experiment chamber 11 is increased through reciprocating circulation.
In this embodiment, the water storage module 332 further includes a plurality of water storage tanks 3321, each water storage tank 3321 is disposed at intervals and fixed on the sidewall of the humidification chamber 3311, each water storage tank 3321 is disposed at intervals and encloses to form a serpentine channel 3322, and the air inlet 3312 and the air outlet 3313 are located at two ends of the serpentine channel 3322. Specifically, the water storage module 332 is provided with a plurality of pure water tanks forming the serpentine channel 3322, so that the gas in the experiment cavity 11 is circulated, fully mixed with the water vapor and then discharged from the air outlet 3313, and further the full mixing of the gas and the micro water is realized.
In this embodiment, the heat supply module 333 further includes a heat exchange coil 3331, and the heat exchange coil 3331 is coiled on the surface of the tank 331 to supply heat to each water storage tank 3321. Specifically, the heat exchange coil 3331 can fully supply each water storage tank 3321, thereby accelerating vaporization of the water body.
In this embodiment, further, the surface of the tank 331 is further provided with a water inlet 3314 and a water outlet 3315, and the water inlet 3314 and the water outlet 3315 are respectively located at the top of the tank 331 and the bottom of the tank 331.
The embodiment of the utility model also provides an environment-friendly insulating gas insulating property experimental method, which is executed by the environment-friendly insulating gas insulating property experimental device and comprises the following steps:
s100: the gas supply unit 20 supplies background gas and environment-friendly insulating gas to be tested to the experiment cavity 11;
s200: the humidifying unit 30 humidifies the environment-friendly insulating gas in the experiment cavity 11 to obtain environment-friendly insulating gas with a certain micro water concentration;
s300: the voltage supply module 41 supplies voltage to the two electrodes 43 and gradually pressurizes the two electrodes, and the voltage measurement module 42 obtains the breakdown voltage between the two electrodes 43 when the two electrodes 43 break through the insulating gap 431;
s400: changing the micro water concentration of the environment-friendly insulating gas in the step S200, repeating the steps S300 to S400, obtaining breakdown voltages corresponding to a plurality of groups of environment-friendly insulating gases with different micro water concentrations, and establishing a graph of the breakdown voltages and the micro water concentrations;
s500: the relation between the breakdown voltage and the micro water concentration is determined through a graph.
Specifically, the relation between the breakdown voltage and the micro water concentration can be effectively obtained through the experimental process, and a reference is provided for establishment of the micro water content and the insulation performance of the environment-friendly insulation gas.
In this embodiment, before S100, the experiment cavity 11 and the two electrodes 43 are scrubbed with absolute ethanol and non-woven fabrics, then the air tightness of the experiment cavity 11 is checked, after the air tightness of the experiment cavity 11 is checked, the air chamber and the micro water measurement system are cleaned 2-3 times by using background gas, after the whole system is dried, the first control valve 22 is opened, and the background gas and the environment-friendly insulating gas are sequentially filled into the whole system according to the dalton partial pressure law. The insulating gas is mainly C 5 F 10 O、C 6 F 12 O, HFO-1234ze (E) and the like, the background gas being mainly N 2 、CO 2 Air, etc.
In S200, when the barometer 23 shows that the preset air pressure is reached, the first control valve 22 is closed.
In S200, the environment-friendly insulating mixed gas is fully circulated in the circulation pipe 31 until the micro water content displayed by the first micro water meter 34 and the second micro water meter 35 is stabilized as C 1 After that, the second control valve 37 and the third control valve 38 are closed and the driving of the pump 32 is suspended, and at this time, the pressurization of both ends of the electrode 43 is started until breakdown occurs, and the breakdown voltage V at this time is recorded 11 . After the primary breakdown is completed, the second control valve 37 and the third control valve 38 are opened, the driving of the pump 32 is stopped, the environment-friendly insulating gas in the experiment cavity 11 is circulated again through the circulating pipe 31, and when the micro water content is stabilized to C again 1 At this time, the breakdown experiment is conducted again and the breakdown voltage V at this time is recorded 12 This operation is repeated and the voltage V of the jth breakdown is recorded 1j (j≥5)。
Finally, average breakdown voltage is obtainedTo reduce experimental errors by taking averages over multiple measurements.
In S400, a micro water content of C is obtained 2 Mean value of time breakdown voltage
Thereby obtaining the micro water content of C i Mean value of time breakdown voltage
In this embodiment, the experimental method further includes the following steps: and changing the feeding amounts of the background gas and the environment-friendly insulating gas to be tested in the step S100, and repeating the steps S400 to S500 to determine the relation between the breakdown voltage and the micro water concentration under different pressures.
Specifically, the breakdown voltage of the environment-friendly insulating gas changes along with the change of the micro water content, the relation between the micro water content and the breakdown voltage under different mixing ratios and different pressures is established through the curves of the micro water content and the breakdown voltage, and the influence of the micro water on the insulating property of the environment-friendly insulating gas is clear. The breakdown voltage of the environment-friendly insulating gas under different mixing ratios and different pressures can be respectively expressed as V Rmi 、V Pni (m, n > 1; m, n represent respectively the mth mixing ratio and the nth pressure condition), respectively, may be represented by the relation V Rmi ＝f mi (C i )、V Pni ＝f ni (C i ) To represent.
In the embodiment, the method also comprises the verification of a relational expression, and under the same condition, when the micro water content is C k When (1 < k < i), the breakdown voltage of the environment-friendly insulating gas is reduced to C which is the micro water content 1 At 98% of the time, i.e. V Rmk ＜98％V Rm1 、V Pnk ＜98％ V Pn1 When the micro water content is C k The insulation properties are greatly affected.
When the air pressure and the mixing ratio of the mixed gas are changed, the threshold value C of the micro water content in the environment-friendly insulating gas under different conditions can be respectively determined k I.e.When (1).
In particularAnd respectively selecting a group of experiments under different air pressures and different mixing ratios, and verifying the accuracy of the established relation between the breakdown voltage and the micro water content by a clamping method. Specifically, under certain conditions, the micro water content is measured to be C 1 Breakdown voltage V of environment-friendly insulating gas 1 Afterwards; randomly determining a micro water content C x Breakdown voltage of V x . If V is x ＞98％ V 1 Setting the micro water content C x+1 ＞C x Performing breakdown experiment again to obtain breakdown voltage V x+1 The method comprises the steps of carrying out a first treatment on the surface of the If V is x ＜98％ V 1 Setting the micro water content C x+1 ＜C x Performing breakdown experiment again to obtain breakdown voltage V x+1 . Further, compare V x+1 And 98% V 1 If not, continuing to set different micro water contents until V appears x+y ＝98％ V 1 When (y is greater than or equal to 0), corresponding C x+y I.e. the threshold value of the micro water content.
Comparative C k And C x+y If the size of (a)Indicating established relation V Rmi ＝f mi (C i )、V Pni ＝f ni (C i ) Is more accurate.
In practical application, the insulation strength of the gas in the current state can be determined directly by the relation through the micro water content of the environment-friendly insulation gas in the insulation equipment, and a good basis is provided for the state evaluation of the equipment.
If C x+y ≠C k Indicating established relation V Rmi ＝f mi (C i )、V Pni ＝f ni (C i ) The existing error is larger, and the environment-friendly insulating gases with different micro water contents are added in the experimental process to carry out the breakdown experiment so as to obtain a more accurate relational expression.
The above-described embodiments of the present utility model do not limit the scope of the present utility model. Any other corresponding changes and modifications made in accordance with the technical idea of the present utility model shall be included in the scope of the claims of the present utility model.
Claims (10)
1. An environmental protection insulating gas insulating properties experimental apparatus, characterized in that includes:
the experimental device is characterized in that a closed experimental cavity is arranged in the experimental device, and a gas inlet communicated with the experimental cavity is formed in the surface of the experimental device;
the gas supply unit is connected with the gas inlet and is used for introducing background gas and environment-friendly insulating gas to be tested into the experiment cavity;
the humidifying unit is connected with the experiment device and used for humidifying the environment-friendly insulating gas in the experiment cavity and measuring the humidity of the environment-friendly insulating gas;
breakdown experiment unit, breakdown experiment unit is including supplying pressure module, pressure measurement module and two electrodes, two the inter-electrode interval set up in the experiment intracavity, two form insulating clearance between the electrode, supply pressure module with pressure measurement module with two the electrode is connected, supply pressure module to be used for to two the electrode provides the breakdown voltage that breaks down insulating clearance, pressure measurement module is used for two the voltage between the electrodes is measured.
2. The environment-friendly insulating gas insulating property experimental device according to claim 1, wherein the humidifying unit comprises a circulating pipe, a driving pump and a humidifier, the circulating pipe is provided with an air inlet end and an air outlet end, the air inlet end and the air outlet end are both communicated with the experimental cavity, the driving pump and the humidifier are both arranged on the circulating pipe, the driving pump is used for driving gas in the experimental cavity to enter the circulating pipe from the air inlet end and be discharged from the air outlet end, and the humidifier is used for humidifying the gas flowing through.
3. The experimental device for the insulation gas insulation performance of environmental protection according to claim 2, wherein the humidifying unit further comprises a first micro-water meter, and the first micro-water meter is installed on the circulating pipe and located on one side of the humidifier, which is close to the air outlet end, and is used for measuring the humidity of the air which is discharged through the air outlet end.
4. The experimental device for the insulation gas insulation performance of environmental protection according to claim 2, wherein the humidifying unit further comprises a second micro water meter which is installed at the circulating pipe and is positioned at one side of the driving pump close to the air inlet end, and is used for measuring the humidity of the gas entering the circulating pipe from the air inlet end.
5. The experimental device for the insulation gas insulation performance of environmental protection according to claim 2, wherein the humidifying unit further comprises a flowmeter, and the flowmeter is installed on the circulating pipe and is used for measuring the flow rate of the gas in the circulating pipe.
6. The environment-friendly insulating gas insulating property experimental device according to claim 2, wherein the humidifier comprises a tank body, a heat supply module and a water storage module, a humidifying cavity is arranged in the tank body, the water storage module is arranged in the humidifying cavity and used for storing water, the heat supply module and the water body arranged in the tank body and used for supplying heat to the water storage module, an air inlet and an air outlet are formed in the surface of the tank body, and the circulating pipe is connected with the air inlet and the air outlet, so that gas of the circulating pipe enters the humidifying cavity from the air inlet and is discharged from the air outlet.
7. The environment-friendly insulating gas insulating property experimental device according to claim 6, wherein the water storage module comprises a plurality of water storage tanks, the water storage tanks are arranged at intervals and fixed on the side wall of the humidifying cavity, the water storage tanks are arranged in a staggered mode and enclose to form a serpentine channel, and the air inlet and the air outlet are positioned at two ends of the serpentine channel.
8. The environment-friendly insulating gas insulating property experimental device according to claim 7, wherein the heat supply module comprises a heat exchange coil coiled on the surface of the tank body and used for supplying heat to each water storage tank.
9. The experimental device for environment-friendly insulating gas insulation performance according to any one of claims 1 to 8, wherein the voltage supply module comprises a power supply, a voltage regulator, a transformer and a protection resistor, the voltage regulator is electrically connected with the power supply, a voltage input end of the transformer is electrically connected with the voltage regulator, a voltage output end of the transformer is connected with two electrodes, and the protection resistor is connected to a connection line between the transformer and one of the electrodes.
10. The environment-friendly insulating gas insulating property experimental device according to claim 9, wherein the pressure measuring module comprises a voltmeter and a capacitive voltage divider, the capacitive voltage divider is connected with two electrodes in parallel, and the voltmeter is electrically connected with the capacitive voltage divider and is used for measuring the voltage of the capacitive voltage divider.
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| CN202223393962.7U CN219456374U (en) | 2022-12-15 | 2022-12-15 | Environment-friendly insulating gas insulating property experimental device |
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| CN202223393962.7U CN219456374U (en) | 2022-12-15 | 2022-12-15 | Environment-friendly insulating gas insulating property experimental device |
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