CN118937927A - A temperature controllable oil electrical strength test device and method - Google Patents
A temperature controllable oil electrical strength test device and method Download PDFInfo
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- CN118937927A CN118937927A CN202411138226.8A CN202411138226A CN118937927A CN 118937927 A CN118937927 A CN 118937927A CN 202411138226 A CN202411138226 A CN 202411138226A CN 118937927 A CN118937927 A CN 118937927A
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- 238000012360 testing method Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title abstract description 9
- 238000005485 electric heating Methods 0.000 claims abstract description 16
- 230000015556 catabolic process Effects 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 1
- 239000011810 insulating material Substances 0.000 abstract description 12
- 238000012827 research and development Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001052 transient effect Effects 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- 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
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
本发明公开了一种温度可控油中电气强度试验设备及方法，包括试验电路系统、测量电极系统和PC控制系统；试验电路系统连接测量电极系统，试验电路系统和测量电极系统均与PC控制系统连接，测量电极系统中设置有温控油箱和试验油箱，温控油箱和试验油箱连通，温控油箱内设置有电热板，试验油箱内设置有上电极和下电极，试验油箱内一侧安装有若干温度传感器，试验电路系统中设置有变压器，上电极连接变压器，下电极接地。本发明使试验油箱中油温度稳定，实现了绝缘材料油中电气强度试验的温度可控，同时，高压与低压电路完全屏蔽，防止干扰，保证了试验的准确性，为变压器用绝缘材料的研发提供了科学有效的试验设备。
The present invention discloses a temperature controllable oil-in-electrical strength test device and method, comprising a test circuit system, a measuring electrode system and a PC control system; the test circuit system is connected to the measuring electrode system, the test circuit system and the measuring electrode system are both connected to the PC control system, a temperature control oil tank and a test oil tank are arranged in the measuring electrode system, the temperature control oil tank and the test oil tank are connected, an electric heating plate is arranged in the temperature control oil tank, an upper electrode and a lower electrode are arranged in the test oil tank, a plurality of temperature sensors are installed on one side of the test oil tank, a transformer is arranged in the test circuit system, the upper electrode is connected to the transformer, and the lower electrode is grounded. The present invention stabilizes the oil temperature in the test oil tank, realizes the temperature controllable test of the electrical strength of the insulating material in the oil, and at the same time, the high-voltage and low-voltage circuits are completely shielded to prevent interference, thereby ensuring the accuracy of the test, and providing scientific and effective test equipment for the research and development of insulating materials for transformers.
Description
Technical Field
The invention belongs to the field of detection of electrical intensity in insulating material oil, and particularly relates to equipment and a method for testing electrical intensity in temperature-controllable oil.
Background
In recent years, with the explosion of ultra-high voltage direct current transmission (UHVDC) projects, a converter transformer is used as core equipment in a direct current transmission system, and the capacity and the voltage level of the converter transformer are continuously increased, so that unprecedented challenges and opportunities are brought to power transmission. The special working conditions of the converter transformer in the power conversion process, such as high frequency, high voltage and complex thermal environment, lead the hot spot distribution and the temperature field inside the converter transformer to have obvious uniqueness.
In this context, the insulating material of the converter transformer is faced with unprecedented electrical performance requirements. The insulating material is a key for guaranteeing the safe and stable operation of the transformer, and the electrical performance of the insulating material is directly related to the service life and reliability of the transformer. In particular, in a high-temperature environment, the electrical strength of the insulating material is affected, so that faults such as insulation failure, breakdown and the like can be possibly caused, and the stable operation of the power system is threatened.
Therefore, in order to intensively study the influence of temperature on the electrical strength of the insulating material for transformers, a special electrical strength test apparatus is required. Such a device is required to be capable of simulating the electrical conditions of the converter transformer when actually operating, and is required to have a temperature adjusting function in the electrode portion. At present, the existing electrical strength test equipment cannot accurately control the temperature of a test environment due to the lack of a temperature regulation function, so that the precision of a test result is reduced, and the requirement of high-precision test cannot be met.
Disclosure of Invention
The invention aims to provide equipment and a method for testing electrical strength in temperature-controllable oil, which solve the problem that the existing electrical strength testing equipment does not have a temperature adjusting function.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
The temperature-controllable electrical strength test equipment in the oil comprises a test circuit system, a measuring electrode system and a PC control system;
The test circuit system is connected with the measurement electrode system, the test circuit system and the measurement electrode system are both connected with the PC control system, a temperature control oil tank and a test oil tank are arranged in the measurement electrode system, the temperature control oil tank is communicated with the test oil tank, an electric heating plate is arranged in the temperature control oil tank, an upper electrode and a lower electrode are arranged in the test oil tank, a plurality of temperature sensors are arranged on one side in the test oil tank, a transformer is arranged in the test circuit system, the upper electrode is connected with the transformer, and the lower electrode is grounded.
Further, a contactor is arranged in the test circuit system, one end of the contactor is connected with the transformer, the other end of the contactor is connected with the switch, and the switch, the contactor and the transformer are all connected with the PC control system.
Further, a protection resistor is arranged between the transformer and the upper electrode.
Further, an opening is formed in the top of the test oil tank.
Further, an electrode frame is arranged in the test oil tank, and the upper electrode and the lower electrode are arranged on the electrode frame.
Further, the both sides of control by temperature change oil tank and experimental oil tank are all connected through leading oil pipe, one side it is provided with oil solenoid valve and oil pump to lead on the oil pipe, the opposite side it is provided with the backward flow solenoid valve to lead on the oil pipe, oil solenoid valve, oil pump and backward flow solenoid valve all connect PC control system, all be provided with the sealing washer between the connector of oil pipe and control by temperature change oil tank and experimental oil tank.
Further, an exhaust hole and an oil filling hole are formed in the top of the temperature control oil tank, and an oil drain hole is formed in the bottom of the temperature control oil tank.
Further, the temperature sensors and the electric heating plates are connected with a PC control system.
Further, a test support is arranged in the measuring electrode system, the temperature control oil tank and the test oil tank are arranged on the test support, and the test oil tank is higher than the temperature control oil tank.
A method for testing the electrical strength in temperature-controllable oil of the device, comprising:
filling oil into the temperature-controlled oil tank, filling oil into the test oil tank after the temperature-controlled oil tank is filled, stopping filling oil after the liquid level of the test oil tank exceeds the uppermost temperature sensor, and finishing equipment oil filling;
placing the sample between the upper electrode and the lower electrode, and compacting by using the upper electrode;
The electric heating plate starts to heat, oil flows upwards after being heated, oil is pumped by an oil pump on an oil guide pipe to enter a test oil tank, oil in the test oil tank flows back into a temperature control oil tank under the action of gravity, oil circulation heating of a transformer is realized, the electric heating plate stops heating after the average temperature value monitored by a temperature sensor reaches a set temperature, and the oil pump stops working when the difference between the temperatures monitored by the temperature sensor is less than 0.5 ℃, so that control of the test temperature is completed;
the PC control system controls the voltage of the transformer to be boosted at a constant speed, the sample is kept in a high insulation state, the loop current is small, when the insulation sample is broken down, the sample is instantaneously conducted, instantaneous large current is generated, the transformer is reset, the PC control system records the breakdown voltage, and the breakdown test is completed.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides electrical strength test equipment in temperature-controllable oil, which is characterized in that a test circuit system and a measuring electrode system are connected with a PC control system, and the PC can collect and process temperature and voltage values and control voltage rising and dropping of a transformer, a solenoid valve switch, an oil pump switch, a heating plate switch and the like. The transformer in the test circuit system is connected with the electrode in the measuring electrode system, the temperature control oil tank and the test oil tank are arranged in the measuring electrode system, the temperature control oil tank is communicated with the test oil tank, and the electrode is arranged in the test oil tank. The test oil tank is separated from the temperature control oil tank, so that the influence of creepage or partial discharge on the test result caused by the high-voltage breakdown test of the heating plate is prevented. An electric heating plate is arranged in the temperature control oil tank, a plurality of temperature sensors are arranged on one side in the test oil tank, the environment temperature of breakdown tests in insulating material oil is controlled, electric strength tests of insulating materials at different temperatures are realized, and the accuracy of temperature control is ensured. According to the invention, the measuring electrode system is modified on the basis of the original electric strength test equipment according to the current research and development test requirements, so that the temperature of the oil in the test oil tank is stable, the temperature of the electric strength test in the insulating material oil is controllable, meanwhile, the high-voltage and the low-voltage circuit are completely shielded, the interference is prevented, the test accuracy is ensured, and scientific and effective test equipment is provided for the research and development of the insulating material for the transformer.
Furthermore, a plurality of temperature sensors are arranged on one side in the test oil tank, so that temperature control above room temperature can be realized, multipoint temperature measurement is adopted, the temperature is more accurate, and the distribution is more uniform.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the temperature-controllable oil electrical strength test equipment.
FIG. 2 is a schematic diagram of a measuring electrode system according to the present invention.
Fig. 3 is a control schematic of the present invention.
Wherein: 1-switch, 2-contactor, 3-transformer, 4-protection resistor, 5-PC, 6-test oil tank, 7-temperature control oil tank, 8-electrode holder, 9-upper electrode, 10-lower electrode, 11-temperature sensor, 12-oil solenoid valve, 13-oil pump, 14-return solenoid valve, 15-exhaust hole, 16-oil filler hole, 17-oil drain hole, 18-electric plate, 19-test support.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the invention provides a temperature-controllable oil electrical strength test device, which comprises a test circuit system, a measurement electrode system and a PC control system, wherein the test circuit system is connected with the measurement electrode system, and the test circuit system and the measurement electrode system are both connected with the PC control system.
The test circuitry comprises a switch 1, a contactor 2, a transformer 3 and a protection resistor 4. The switch 1 is connected with one end of the contactor 2, the switch 1 supplies power to the test equipment, the contactor 2 is linked with the door lock, and the power supply safety of the equipment is guaranteed. The other end of the contactor 2 is connected with a transformer 3, the transformer 3 comprises an input end and a measuring end, the input end is connected with an electrode, a test high voltage is provided, and the measuring end feeds back a test voltage. A protection resistor 4 is arranged between the transformer 3 and the electrode, and the protection resistor 4 protects transient current during breakdown.
As shown in fig. 2, the measuring electrode system comprises a test tank 6, a temperature-controlled tank 7 and a test stand 19. The test oil tank 6 and the temperature control oil tank 7 are connected through two oil inlet and outlet pipes, an oil inlet solenoid valve 12 and an oil pump 13 are arranged on one oil inlet pipe, the oil inlet solenoid valve 12 is opened, hot oil in the temperature control oil tank 7 can be pumped into the test oil tank 6 through the oil pump 13, a return solenoid valve 14 is arranged on the other oil inlet pipe, the return solenoid valve 14 is opened, and oil in the test oil tank 6 can flow back to the temperature control oil tank 7. The opening parts of the test oil tank 6 and the temperature control oil tank 7, which are connected with the oil guide pipe, are respectively provided with a sealing ring for ensuring sealing. The test oil tank 6 and the temperature control oil tank 7 are made of high-permeability insulating acrylic plates, so that the oil level and the test phenomenon can be conveniently observed. The temperature control oil tank 7 and the test oil tank 6 are arranged on the test support 19, and the position of the test oil tank 6 is higher than that of the temperature control oil tank 7, so that oil can flow back to the temperature control oil tank 7 from the test oil tank 6 conveniently through the action of gravity.
The top of the test oil tank 6 is provided with an opening, so that the test oil tank 6 is conveniently filled with oil. A plurality of temperature sensors 11 are arranged up, down and up on one side of the inside of the test oil tank 6, and the monitoring temperature of the oil in the test oil tank 6 is fed back to the PC control system. An electrode frame 8 made of bakelite material is arranged in the transformer, an upper electrode 9 and a lower electrode 10 are arranged on the electrode frame 8, the upper electrode 9 is connected with the high-voltage end of the transformer 3 through a cable, the lower electrode 10 is grounded through the cable, and a uniform electric field is provided for a sample to be tested between the upper electrode 9 and the lower electrode 10.
The bottom of the temperature control oil tank 7 is provided with an electric heating plate 18 for heating the oil in the temperature control oil tank 7, so as to realize controllable test temperature. The top of the temperature control oil tank 7 is provided with an exhaust hole 15 and an oil filling hole 16, so that oil can be conveniently filled into the temperature control oil tank 7, and the bottom is provided with an oil drain hole 17.
As shown in fig. 3, the PC control system includes a PC 5, and the PC 5 can collect the processing temperature and voltage values, and control the voltage rising and falling of the transformer 3, the switching of the solenoid valve, the switching of the oil pump 13, and the switching of the electric heating plate 18. The PC 5 is connected with the power switch 1 and controls the power supply to be turned on or off; the control device is connected with the contactor 2, judges the door lock condition and controls the power supply; the voltage signal is collected, the breakdown termination signal is judged, and the breakdown voltage is recorded; the temperature sensor 11 is connected with the plurality of temperature sensors 11, and the temperature of the plurality of temperature sensors 11 is collected to judge the heating stop temperature; is connected with an electric heating plate 18, the electric heating plate 18 is controlled to be turned on and off; is connected with an oil feeding electromagnetic valve 12 and a return electromagnetic valve 14, and controls the switching of the electromagnetic valve; is connected with the oil pump 13 and controls the on-off of the oil pump 13.
The invention relates to a method for testing the electrical strength in temperature-controllable oil, which specifically comprises the following steps:
Step 1, oiling equipment: when filling oil, an exhaust hole 15 at the top of the temperature-controlled oil tank 7 is opened, a return electromagnetic valve 14 is opened, oil is filled through an oil filling hole 16, and after the temperature-controlled oil tank 7 is filled, the exhaust hole 15, the oil filling hole 16 and the return electromagnetic valve 14 are closed; filling oil from an opening at the top of the test oil tank 6, and stopping filling oil after the liquid level of the test oil tank 6 exceeds the uppermost temperature sensor 11; the oil feeding electromagnetic valve 12 and the return electromagnetic valve 14 are opened, the oil pump 13 is started, air in the temperature-control oil tank 7 is emptied, and the equipment oil injection is completed.
Step 2, sample treatment: the conditioned insulating paper board or insulating member is placed between the upper electrode 9 and the lower electrode 10, and compacted with the upper electrode 9.
Step 3, temperature control: after the test temperature is set, the electric heating plate 18 starts to heat, the oil feeding electromagnetic valve 12, the backflow electromagnetic valve 14 and the oil pump 13 are opened, oil flows upwards after being heated, the oil pump 13 pumps hot oil into the test oil tank 6, the oil in the test oil tank 6 flows back into the temperature control oil tank 7 under the action of gravity, the oil circulation heating of the transformer 3 is realized, after the average temperature value monitored by the temperature sensor 11 reaches the set temperature, the electric heating plate 18 stops heating, when the difference between the temperatures monitored by the temperature sensor 11 is less than 0.5 ℃, the oil pump 13 stops working, the oil feeding electromagnetic valve 12 and the backflow electromagnetic valve 14 are closed, and the control of the test temperature is completed.
Step 4, breakdown test: and starting a breakdown test, wherein the PC 5 controls the voltage of the transformer 3 to be boosted at a constant speed, the sample is kept in a high insulation state, the loop current is small, when the insulation sample is broken down, the sample is instantaneously conducted to generate instantaneous heavy current, the transformer 3 is reset, and the PC 5 records the breakdown voltage to finish the breakdown test.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The temperature-controllable electrical strength test equipment in the oil is characterized by comprising a test circuit system, a measuring electrode system and a PC control system;
The test circuit system is connected with the measurement electrode system, the test circuit system and the measurement electrode system are connected with the PC control system, a temperature control oil tank (7) and a test oil tank (6) are arranged in the measurement electrode system, the temperature control oil tank (7) is communicated with the test oil tank (6), an electric heating plate (18) is arranged in the temperature control oil tank (7), an upper electrode (9) and a lower electrode (10) are arranged in the test oil tank (6), a plurality of temperature sensors (11) are arranged on one side in the test oil tank (6), a transformer (3) is arranged in the test circuit system, the upper electrode (9) is connected with the transformer (3), and the lower electrode (10) is grounded.
2. The temperature-controllable oil-in-electrical strength test device according to claim 1, wherein a contactor (2) is arranged in the test circuit system, one end of the contactor (2) is connected with a transformer (3), the other end of the contactor is connected with a switch (1), and the switch (1), the contactor (2) and the transformer (3) are all connected with a PC control system.
3. The temperature-controllable oil-in-electrical strength test device according to claim 1, characterized in that a protection resistor (4) is arranged between the transformer (3) and the upper electrode (9).
4. The temperature-controllable oil-in-electrical strength test device according to claim 1, wherein the top of the test oil tank (6) is provided with an opening.
5. The temperature-controllable oil-in-electrical strength test device according to claim 1, wherein an electrode holder (8) is arranged in the test oil tank (6), and the upper electrode (9) and the lower electrode (10) are arranged on the electrode holder (8).
6. The electrical strength test device in temperature-controllable oil according to claim 1, wherein the temperature-controllable oil tank (7) is connected with two sides of the test oil tank (6) through oil guide pipes, an oil feeding electromagnetic valve (12) and an oil pump (13) are arranged on one side of the oil guide pipes, a backflow electromagnetic valve (14) is arranged on the other side of the oil guide pipes, the oil feeding electromagnetic valve (12), the oil pump (13) and the backflow electromagnetic valve (14) are all connected with a PC control system, and sealing rings are arranged between the oil guide pipes and connectors of the temperature-controllable oil tank (7) and the test oil tank (6).
7. The temperature-controllable oil electrical strength test device according to claim 1, wherein the top of the temperature-controllable oil tank (7) is provided with an exhaust hole (15) and an oil filling hole (16), and the bottom of the temperature-controllable oil tank (7) is provided with an oil draining hole (17).
8. The temperature-controllable oil-in-electrical strength test equipment according to claim 1, wherein a plurality of temperature sensors (11) and electric heating plates (18) are connected with a PC control system.
9. The electrical strength test equipment in temperature-controllable oil according to claim 1, wherein a test support (19) is arranged in the measuring electrode system, the temperature-controllable oil tank (7) and the test oil tank (6) are both arranged on the test support (19), and the test oil tank (6) is higher than the temperature-controllable oil tank (7).
10. A method of testing electrical strength in temperature-controllable oil according to any one of claims 1 to 9, comprising:
filling oil into the temperature-controlled oil tank (7), filling oil into the test oil tank (6) after the temperature-controlled oil tank (7) is filled, stopping filling oil after the liquid level of the test oil tank (6) exceeds the uppermost temperature sensor (11), and finishing equipment oil filling;
Placing a sample between an upper electrode (9) and a lower electrode (10) and compacting by the upper electrode (9);
The electric heating plate (18) starts to heat, oil flows upwards after being heated, hot oil is pumped into the test oil tank (6) through the oil pump (13) on the oil guide pipe, oil in the test oil tank (6) flows back into the temperature control oil tank (7) under the action of gravity, oil circulation heating of the transformer (3) is realized, after the average temperature value monitored by the temperature sensor (11) reaches a set temperature, the electric heating plate (18) stops heating, and when the difference between the temperatures monitored by the temperature sensor (11) is less than 0.5 ℃, the oil pump (13) stops working, and the control of the test temperature is completed;
The PC control system controls the voltage of the transformer (3) to be boosted at a constant speed, the sample is kept in a high insulation state, the loop current is small, when the insulation sample is broken down, the sample is instantaneously conducted to generate instantaneous heavy current, the transformer (3) is reset, the PC control system records the breakdown voltage, and the breakdown test is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411138226.8A CN118937927A (en) | 2024-08-19 | 2024-08-19 | A temperature controllable oil electrical strength test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411138226.8A CN118937927A (en) | 2024-08-19 | 2024-08-19 | A temperature controllable oil electrical strength test device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118937927A true CN118937927A (en) | 2024-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411138226.8A Pending CN118937927A (en) | 2024-08-19 | 2024-08-19 | A temperature controllable oil electrical strength test device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118937927A (en) |
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2024
- 2024-08-19 CN CN202411138226.8A patent/CN118937927A/en active Pending
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