CN117471251A - Transformer oil continuous discharge gas production and pressure characteristic research test system and method - Google Patents
Transformer oil continuous discharge gas production and pressure characteristic research test system and method Download PDFInfo
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- CN117471251A CN117471251A CN202311418546.4A CN202311418546A CN117471251A CN 117471251 A CN117471251 A CN 117471251A CN 202311418546 A CN202311418546 A CN 202311418546A CN 117471251 A CN117471251 A CN 117471251A
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- 238000012360 testing method Methods 0.000 title claims abstract description 204
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000011160 research Methods 0.000 title claims abstract description 21
- 238000010891 electric arc Methods 0.000 claims abstract description 38
- 230000015556 catabolic process Effects 0.000 claims abstract description 22
- 239000011810 insulating material Substances 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 74
- 238000011156 evaluation Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a research and test system and method for continuous discharge gas production and pressure characteristics of transformer oil, wherein the test system comprises an electric arc test system and a pressure test device, the pressure test device comprises a pressure test bin and a test electrode arranged on the pressure test bin, and the pressure test bin is provided with an observation window, a gas extraction port and a pressure sensor for monitoring the gas pressure in the pressure test bin; the test electrode comprises a high-voltage electrode and a ground electrode, and an electrode adjusting device for adjusting the distance between the high-voltage electrode and the ground electrode is connected to the pressure test bin; the arc test system is connected with the high-voltage electrode and the ground electrode and is used for supplying power to the high-voltage electrode and the ground electrode. The invention can simulate the voltage breakdown condition under the actual working condition, ensure the accuracy and the reliability and evaluate the performance of the insulating material more truly.
Description
Technical Field
The invention belongs to the technical field of discharge detection of insulating media of high-voltage equipment, and particularly relates to a system and a method for researching and testing continuous discharge gas production and pressure characteristics of transformer oil.
Background
As an important device for power transfer and distribution, an insulation system of a power transformer is critical to device performance and reliability. However, due to long-term operation or other external factors, transformer insulation systems may malfunction, one common failure being the generation of gas in transformer oil, leading to equipment damage and accidents. The gas generation in the transformer oil is mainly caused by the conditions of arc discharge, local overheating, defects in the transformer and the like in the electrical equipment. These discharge processes can lead to molecular decomposition in transformer oil, producing gases such as hydrogen, methane, ethane, etc. The gas accumulation may cause a pressure rise inside the transformer, thereby affecting insulation performance and normal operation of the device. The arc discharge is taken as a main reason for generating gas in the transformer oil, and the continuous discharge gas generation and pressure characteristics in the transformer oil under the condition of arc discharge are known in depth by simulating the arc discharge, so that the method is very important for the safe operation of the transformer and the design of an insulation system. Therefore, it is necessary to develop a test system capable of accurately simulating the arc discharge environment of a transformer and monitoring the gas generation and pressure change in real time so as to further study the gas generation and pressure characteristics of transformer oil under continuous discharge.
Currently, the research on transformer oil arc discharge mainly depends on simulation tests. The simulation test is capable of generating an arc discharge under controlled conditions and observing its behavior, thereby providing important data about the arc discharge. The traditional simulation test platform relies on the intervention of an arc striking wire, and the arc is controlled to be generated and maintained through the arc striking wire, so that the accuracy and the reliability of the test are limited.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a system and a method for researching and testing the continuous discharge gas production and pressure characteristics of transformer oil.
The technical scheme adopted by the invention is as follows:
the system comprises an arc test system and a pressure test device, wherein the pressure test device comprises a pressure test bin and a test electrode arranged on the pressure test bin, and the pressure test bin is provided with an observation window, a gas extraction port and a pressure sensor for monitoring the gas pressure in the pressure test bin;
the test electrode comprises a high-voltage electrode and a ground electrode, and an electrode adjusting device for adjusting the distance between the high-voltage electrode and the ground electrode is connected to the pressure test bin;
the arc test system is connected with the high-voltage electrode and the ground electrode and is used for supplying power to the high-voltage electrode and the ground electrode.
Preferably, the observation windows are arranged on the two sides of the test electrode on the pressure test bin, and the observation windows are made of glass.
Preferably, the bottom of the pressure test bin is provided with an oil port for injecting and discharging oil.
Preferably, a three-way joint is arranged on the pressure test bin, one end of the three-way joint is connected with the top of the pressure test bin and is communicated with the inner cavity of the pressure test bin, one end of the three-way joint is connected with a pneumatic ball valve and serves as the gas extraction port, the pneumatic ball valve is a quick-plug connector, and one end of the three-way joint is connected with a pressure relief protection valve.
Preferably, the high-voltage wire inlet sleeve is arranged at the position of the high-voltage electrode on the pressure test bin, and the low-voltage wire inlet sleeve is arranged at the position of the ground electrode on the pressure test bin.
Preferably, the high voltage electrode and the ground electrode in the test electrode are in the form of ball-ball electrodes, plate-plate electrodes or tip-plate electrodes.
Preferably, the arc test system comprises a test transformer, a voltage regulator, a current limiting unit, a controller and an isolation transformer, wherein the output end of the isolation transformer, the input end of the voltage regulator and the current limiting resistor unit are connected in series to form a loop, the output end of the voltage regulator is connected with the input end of the test transformer, one pole of the output end of the test transformer is connected with the high-voltage electrode, and the other pole of the output end of the test transformer is grounded and connected with the ground electrode.
Preferably, the current limiting unit comprises a PLC control circuit, an industrial control touch screen and a plurality of parallel current limiting resistors, each current limiting resistor is connected in series with a relay switch, all the relay switches are connected with the PLC control circuit, and the PLC control circuit is connected with the industrial control touch screen.
Preferably, the transformer oil continuous discharge gas production and pressure characteristic research test system further comprises a gas acquisition system and an optical observation system, wherein the gas acquisition system comprises a gas sampler and a gas analyzer, the gas sampler is connected with the gas analyzer, and the gas sampler is connected with the gas extraction port;
the optical observation system comprises a camera, wherein the camera is arranged at the observation window and can shoot the gas generating process of arc discharge of the test electrode.
The invention also provides a method for researching and testing the continuous discharge gas production and pressure characteristics of the transformer oil, which is carried out by adopting the system for researching and testing the continuous discharge gas production and pressure characteristics of the transformer oil, and comprises the following steps:
the method comprises the steps of adding test transformer oil into a pressure test bin, supplying power to a test electrode through an electric arc test system in an intrinsic breakdown test mode to simulate the voltage breakdown condition of an insulating material under actual working conditions, recording current, voltage and gas pressure in the pressure test bin in the process, collecting gas generated in the test transformer oil through a gas extraction port, determining the components and concentration of the generated gas, and obtaining the gas generation process of electric arc discharge in the discharge process of the test electrode through an observation window.
The invention has the following beneficial effects:
in the continuous discharge gas production and pressure characteristic research test system of the transformer oil, the pressure test bin can be used for containing the transformer oil for the test, the test electrode is arranged in the pressure test bin and is soaked in the transformer for the test to discharge and enable the transformer oil for the test to produce gas, the electric arc test system can load preset voltage and current for the test electrode, and an intrinsic breakdown test means is adopted to simulate electric arc discharge, and the intrinsic breakdown is independent of the initiation of an arc striking wire, so that the transformer oil for the test is suitable for various insulating materials and samples. Therefore, the test system is more comprehensive in authenticity, applicability and voltage withstand capability evaluation, and compared with an arc striking wire, the voltage withstand capability of the insulating material can be evaluated more directly, so that the test system is a more comprehensive and more real insulating material performance evaluation method. Meanwhile, the gas extraction port can be used for collecting gas produced by the transformer oil for test and analyzing and researching the components and the concentration of the produced gas. The pressure sensor can be used for monitoring the gas pressure in the pressure test bin. In conclusion, the invention can simulate the voltage breakdown condition under the actual working condition, ensure the accuracy and the reliability and evaluate the performance of the insulating material more truly.
Drawings
FIG. 1 is a schematic diagram of the basic circuit of an arc testing system of the present invention;
FIG. 2 is a block diagram of a pressure test apparatus according to the present invention;
in the figure, a 1-solid state relay, a 2-test transformer, a 3-voltage regulator, a 4-direct current motor, a 5-industrial control touch screen, a 6-isolation transformer, a 7-pressure relief protection valve, an 8-gas extraction port, a 9-high-voltage wire inlet sleeve, a 10-pressure sensor, an 11-test electrode, a 12-observation window, a 13-oil port, a 14-three-way connector and a 15-pressure test bin.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
The invention relates to a research and test system for continuous discharge gas production and pressure characteristics of transformer oil, which comprises an arc test system and a pressure test device, as shown in figure 2, wherein the pressure test device comprises a pressure test bin 15 and a test electrode 11 arranged on the pressure test bin 15, and the pressure test bin 15 is provided with an observation window 12, a gas extraction port 8 and a pressure sensor 10 for monitoring the gas pressure in the pressure test bin 15; the test electrode comprises a high-voltage electrode and a ground electrode, and an electrode adjusting device for adjusting the distance between the high-voltage electrode and the ground electrode is connected to the pressure test bin 15; the arc test system is connected with the high-voltage electrode and the ground electrode and is used for supplying power to the high-voltage electrode and the ground electrode.
The working principle of the continuous discharge gas production and pressure characteristic research test system of the transformer oil is as follows:
the test transformer oil is added into the pressure test bin 15, the test electrode is powered by an electric arc test system in an intrinsic breakdown test mode to simulate the voltage breakdown condition of the insulating material under the actual working condition, in the process, the current, the voltage and the gas pressure in the pressure test bin 15 are recorded, the gas generated in the test transformer oil is collected through the gas extraction port 8, the composition and the concentration of the generated gas are determined, and the gas generation process of the electric arc discharge in the discharge process of the test electrode is obtained through the observation window 12. In the test process, the distance between the high-voltage electrode and the ground electrode can be adjusted through the electrode adjusting device.
As shown in fig. 2, the pressure test chamber 15 of the invention is provided with observation windows 12 on both sides of the test electrode, and the observation windows are made of glass, preferably high-transmittance heat-resistant thick glass, so as to ensure the safety of experiments and the acquisition of experimental image data.
According to the invention, the bottom of the pressure test bin 15 is also provided with the oil port 13 for filling and discharging oil, so that the transformer oil for the test can be conveniently replaced. According to the invention, a three-way joint is arranged on a pressure test bin 15, one end of the three-way joint is connected with the top of the pressure test bin 15 and is communicated with the inner cavity of the pressure test bin 15, one end of the three-way joint is connected with a pneumatic ball valve and is used as the gas extraction port 8, the pneumatic ball valve is a quick-plug interface, and one end of the three-way joint is connected with a pressure relief protection valve 7. The high-voltage wire inlet sleeve 9 is arranged at the position of the high-voltage electrode on the pressure test bin 15, the low-voltage wire inlet sleeve is arranged at the position of the ground electrode on the pressure test bin 15, and the insulating connection between the test electrode and the pressure test bin 15 is realized through the high-voltage wire inlet sleeve 9 and the low-voltage wire inlet sleeve. The high-voltage electrode and the ground electrode in the test electrode can be in the form of ball-ball electrodes, plate-plate electrodes or tip-plate electrodes, and can be specifically selected according to actual requirements.
As shown in fig. 1, the arc test system of the present invention comprises a test transformer 2, a voltage regulator 3, a current limiting unit, a controller and an isolation transformer 6, wherein the output end of the isolation transformer 6, the input end of the voltage regulator 3 and the current limiting resistor unit are connected in series to form a loop, the output end of the voltage regulator 3 is connected with the input end of the test transformer 2, one pole of the output end of the test transformer 2 is connected with the high-voltage electrode, and the other pole of the output end of the test transformer 2 is grounded and connected with the ground electrode. The current limiting unit comprises a PLC control circuit, an industrial control touch screen 5 and a plurality of parallel current limiting resistors, wherein each current limiting resistor is connected in series with a relay switch, all the relay switches are connected with the PLC control circuit, and a voltage regulator 3 and the PLC control circuit are connected with the industrial control touch screen 5. The solid state relay 1 is arranged at one end of the output end of the test transformer 2, which is grounded, and the solid state relay 1 is connected to the PLC control circuit.
Examples
Referring to fig. 1 and 2, the testing system for researching continuous discharge gas production and pressure characteristics of transformer oil in this embodiment includes an arc testing system, a pressure testing device, an optical observation system, a gas collection system, and a data measurement and monitoring system.
The arc test system adopts an intrinsic breakdown test mode to simulate the voltage breakdown condition of the insulating material under the actual working condition, and when the voltage rises to a certain degree, the test sample material cannot prevent the current from passing, so that breakdown occurs.
The arc test system adopts an intrinsic breakdown test mode for generating arc discharge in a simulation test. The arc test system comprises a test transformer 2, a voltage regulator 3, a solid state relay 1, current limiting resistors (R1-R4) and a series of driving control devices. The main function of the arc test system is to simulate arc discharge in transformer oil, and the controllable adjustment of current amplitude and electrifying time is realized through circuit arrangement. The upper layer of the whole test system is a test bed and is connected with a pressure test bin; the lower layer is an electric box, the main equipment is a high-voltage test transformer with rated capacity of 5kVA and highest rated output voltage of 100 kV.
The basic circuit diagram in the electric box is shown in fig. 1, and the test parameters are input into the circuit through an industrial control touch screen 5 of the test stand. The electric box is internally provided with a PLC control circuit for switching the control resistor, switching on and off the test loop and driving the voltage regulator by the stepping motor, and the device can realize control and adjustment of the power-on time through the PLC control circuit.
Under the state of electric arc conduction, the electric arc test system temporarily works under the working condition that the secondary side is almost short-circuited, at the moment, 4 groups of adjustable control resistors R1-R4 are connected in parallel with the primary side of the transformer, and the number of resistors connected into a circuit can be controlled by controlling the switch of each group of resistors, so that the amplitude of output current is controlled. The number of the access resistors is increased, and the amplitude of the output current is reduced.
High-strength electromagnetic interference can be generated in the high-voltage discharge test, and electromagnetic protection is required to be carried out on the circuit part. In order to ensure the safety and controllability of the test ground, the invention effectively prevents the influence of electromagnetic interference on the control circuit by arranging the isolation transformer and using the iron box as the shell and connecting the control circuit to the power supply through the isolation transformer, thereby ensuring the accurate test.
The structure of the pressure test device is shown in fig. 2. The pressure test bin is provided with observation windows which are high-transmittance heat-resistant thick glass and are fixed by flanges and 8 bolts respectively, so that observation and high-speed photographing are facilitated, and the observation windows can be replaced by blind plates. The pressure test bin has pressure sensor and three-way joint, one side of the three-way joint is connected with pressure relief protecting valve, and the other side is connected with pneumatic ball valve for gas-producing port, and the pneumatic ball valve is quick-plugging port, so that it can be conveniently used in vacuum pump and protecting gas (N) 2 ) The bag and the sample gas collecting bag are replaced. The pressure sensor arranged on the upper side of the pressure test bin can be adjusted to be arranged according to the requirements, and the sensor can be adjusted to different measuring points by adjusting the fixing screw, so that the gas at different positions can be more accurately and efficiently measuredThe pressure was tested. The pressure sensor is used for monitoring the pressure change of the gas, and the influence condition of the produced gas on the gas pressure in the test tank can be known by monitoring the pressure change. An oil port for injecting or discharging oil is arranged below the pressure test bin and is used for replacing transformer oil for test. The left side of the pressure test bin is provided with a high-voltage wire inlet sleeve, and the right side of the pressure test bin is provided with a low-voltage wire outlet sleeve. The electrode adjusting device comprises an adjusting rod and a limiting bolt which penetrate through the high-voltage and low-voltage wire inlet sleeve, the electrode spacing and the position of the electrode spacing in the cavity can be freely adjusted, and the structure is a conventional structure and the invention is not particularly limited. The test electrode comprises a high-voltage electrode and a ground electrode, and is connected with the electrode adjusting rod through a bolt, and the test electrode is made of brass. The test electrodes may be switched between ball-ball electrodes, plate-plate electrodes or tip-plate electrodes as desired.
The gas collection system is used for collecting gas generated in the transformer oil. The gas collection system includes a gas sampler and a gas analyzer for determining the composition and concentration of the generated gas. The optical observation system is used for observing the arc discharge process in real time. The system adopts high-definition color CCD high-speed camera and other equipment, and shoots the gas production process of arc discharge through an observation window of a pressure test device. The data measurement and monitoring system can monitor and record the changes of the arc current, the voltage waveform and the internal pressure in the test, and is used for collecting and analyzing the data of gas generation conditions, pressure changes and the like in the test process in real time. The high-resistance voltage dividing arm, the current measuring probe (current clamp) and the pressure sensor are used for measuring and transmitting the measured data to an oscilloscope and a computer for storing and recording, and the obtained information can provide data support for research.
The invention can simulate arc discharge by adopting a test means of intrinsic breakdown: the intrinsic breakdown is a direct reflection of the voltage withstand capability of the insulating material in the sample, and can simulate the voltage breakdown condition under the actual working condition, so that the performance of the insulating material can be estimated more truly. And the intrinsic breakdown is independent of the initiation of the ignition wire, thus being applicable to various types of insulating materials and samples. Meanwhile, the intrinsic breakdown test can evaluate the voltage resistance of the insulating material under different voltages, determine the breakdown voltage, breakdown strength, withstand voltage and other parameters of the insulating material, and help determine the reliability and safety of the insulating material. Therefore, the application of the intrinsic breakdown in an arc test system has higher authenticity, applicability and comprehensive voltage withstand capability evaluation, and compared with an arc striking wire, the voltage withstand capability of the insulating material can be evaluated more directly, so that the method is a more comprehensive and more real insulating material performance evaluation method.
The invention can perform controllable current amplitude adjustment: the invention can adjust the current amplitude by adjusting the resistance quantity of the access circuit, and can control the power-on time through the circuit. The platform can more accurately simulate the arc discharge phenomenon in the transformer, so that the test result is more reliable and has reference value. The invention has real-time observation capability: an optical observation system is provided, which can observe the process of arc discharge in real time. The invention can
And the continuous discharge gas production and pressure characteristics of the transformer oil are further studied: by observing the arc discharge process and recording the changes of parameters of gas production and pressure, the invention is helpful for in-depth research on the gas production and pressure characteristics of transformer oil in the discharge process.
Device security assessment: by simulating the arc discharge phenomenon of transformer oil, researchers can evaluate the safety performance of the equipment. In the experimental process, possible faults and problems can be found, so that corresponding protective measures are taken to prevent the transformer from burning explosion accidents and improve the operation safety of equipment.
In conclusion, the invention has the beneficial effects of providing controllable current amplitude adjustment, real-time observation capability, deep research on arc discharge mechanism, equipment safety evaluation and the like, and brings positive influence to the electric power industry and the field of insulating material research. The invention can research the gas production characteristic and the pressure characteristic of the arc discharge in the arcing stage under the influence factors of current amplitude, duration and electrode spacing, and provides basis for researching the explosion-proof and flame-proof measures of transformer oil. The invention can simulate the working environment and the arc discharge process of the transformer, regulate the current of the device, realize the real-time observation of the continuous discharge gas production condition and the gas production influence on the pressure in the arc discharge process and the discharge process, and provide reliable data support. Such a platform would help to more deeply study the gas production and pressure characteristics of the arc discharge, improving the safety and reliability of the transformer.
In conclusion, the research and test system for the continuous discharge gas production and pressure characteristics of the transformer oil can provide an effective means for researching the arc discharge phenomenon of the power transformer oil and evaluating the gas production characteristics and the pressure characteristics of the transformer oil, and has a wide application prospect.
Claims (10)
1. The research and test system for the continuous discharge gas production and pressure characteristics of the transformer oil is characterized by comprising an electric arc test system and a pressure test device, wherein the pressure test device comprises a pressure test bin (15) and a test electrode (11) arranged on the pressure test bin (15), and an observation window (12), a gas extraction port (8) and a pressure sensor (10) for monitoring the gas pressure in the pressure test bin (15) are arranged on the pressure test bin (15);
the test electrode comprises a high-voltage electrode and a ground electrode, and an electrode adjusting device for adjusting the distance between the high-voltage electrode and the ground electrode is connected to the pressure test bin (15);
the arc test system is connected with the high-voltage electrode and the ground electrode and is used for supplying power to the high-voltage electrode and the ground electrode.
2. The system for researching continuous discharge gas production and pressure characteristics of transformer oil according to claim 1, wherein the observation windows (12) are arranged on both sides of the test electrode on the pressure test bin (15), and glass is adopted as the observation windows.
3. The continuous discharge gas production and pressure characteristic research test system of transformer oil according to claim 1, wherein an oil port (13) for injecting and discharging oil is arranged at the bottom of the pressure test bin (15).
4. The continuous discharge gas production and pressure characteristic research test system of transformer oil according to claim 1, wherein a three-way joint is installed on the pressure test bin (15), one end of the three-way joint is connected with the top of the pressure test bin (15) and is communicated with the inner cavity of the pressure test bin (15), one end of the three-way joint is connected with a pneumatic ball valve and serves as the gas production port (8), the pneumatic ball valve is a quick-plug interface, and one end of the three-way joint is connected with a pressure relief protection valve (7).
5. The continuous discharge gas production and pressure characteristic research test system of transformer oil according to claim 1, wherein a high-voltage wire inlet sleeve (9) is arranged on a pressure test bin (15) at a position where a high-voltage electrode is arranged, and a low-voltage wire inlet sleeve is arranged on the pressure test bin (15) at a position where a ground electrode is arranged.
6. The system of claim 5, wherein the high voltage electrode and the ground electrode are in the form of ball-ball electrode, plate-plate electrode or tip-plate electrode.
7. The system for researching and testing the continuous discharge gas production and pressure characteristics of transformer oil according to claim 1, wherein the electric arc testing system comprises a testing transformer (2), a voltage regulator (3), a current limiting unit, a controller and an isolation transformer (6), wherein an output end of the isolation transformer (6), an input end of the voltage regulator (3) and the current limiting resistor unit are connected in series to form a loop, an output end of the voltage regulator (3) is connected with an input end of the testing transformer (2), one pole of the output end of the testing transformer (2) is connected with the high-voltage electrode, and the other pole of the output end of the testing transformer (2) is grounded and connected with the ground electrode.
8. The transformer oil continuous discharge gas production and pressure characteristic research test system according to claim 7, wherein the current limiting unit comprises a PLC control circuit, an industrial control touch screen (5) and a plurality of parallel current limiting resistors, each current limiting resistor is connected with a relay switch in series, all the relay switches are connected with the PLC control circuit, and the voltage regulator (3) and the PLC control circuit are connected with the industrial control touch screen (5).
9. The continuous discharge gas production and pressure characteristic research test system of transformer oil according to claim 1, further comprising a gas collection system and an optical observation system, wherein the gas collection system comprises a gas sampler and a gas analyzer, the gas sampler is connected with the gas analyzer, and the gas sampler is connected with a gas extraction port (8);
the optical observation system comprises a camera, and the camera is arranged at the observation window (12) and can shoot the gas generating process of arc discharge of the test electrode.
10. The method for researching and testing the continuous discharge gas production and pressure characteristics of the transformer oil is characterized by adopting the continuous discharge gas production and pressure characteristics research and testing system of the transformer oil according to any one of claims 1-9, and comprises the following steps:
the test transformer oil is added into the pressure test bin (15), the test electrode is powered by an electric arc test system in an intrinsic breakdown test mode to simulate the voltage breakdown condition of the insulating material under the actual working condition, in the process, the current, the voltage and the gas pressure in the pressure test bin (15) are recorded, the gas generated in the test transformer oil is collected through the gas extraction port (8) and the composition and the concentration of the generated gas are determined, and the gas generation process of the electric arc discharge in the discharge process of the test electrode is obtained through the observation window (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418546.4A CN117471251A (en) | 2023-10-27 | 2023-10-27 | Transformer oil continuous discharge gas production and pressure characteristic research test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418546.4A CN117471251A (en) | 2023-10-27 | 2023-10-27 | Transformer oil continuous discharge gas production and pressure characteristic research test system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117471251A true CN117471251A (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311418546.4A Pending CN117471251A (en) | 2023-10-27 | 2023-10-27 | Transformer oil continuous discharge gas production and pressure characteristic research test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117471251A (en) |
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2023
- 2023-10-27 CN CN202311418546.4A patent/CN117471251A/en active Pending
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