CN212483747U - A new type of insulating oil dielectric strength tester - Google Patents
A new type of insulating oil dielectric strength tester Download PDFInfo
- Publication number
- CN212483747U CN212483747U CN202020742867.5U CN202020742867U CN212483747U CN 212483747 U CN212483747 U CN 212483747U CN 202020742867 U CN202020742867 U CN 202020742867U CN 212483747 U CN212483747 U CN 212483747U
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- voltage
- acquisition module
- oil
- insulating oil
- dielectric strength
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- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 18
- 238000012360 testing method Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model discloses a novel insulating oil dielectric strength tester, including insulating oil dielectric strength tester body, insulating oil dielectric strength tester body includes current acquisition module and voltage acquisition module, and the output of current acquisition module passes through the AD converter and links to each other with CPU control module, and the input of current acquisition module links to each other with the low voltage side of high-pressure dry-type transformer for carry out real-time supervision to the low voltage side electric current of high-pressure dry-type transformer; the output end of the voltage acquisition module is connected with the CPU control module, and the input end of the voltage acquisition module is connected with the high-voltage side of the high-voltage dry-type transformer and used for monitoring the voltage of the high-voltage side of the high-voltage dry-type transformer in real time. The utility model discloses compare the result of voltage acquisition module monitoring high-voltage side voltage of high-voltage dry-type transformer in real time with the required minimum breakdown voltage value of high-voltage electrical equipment, whether cut off the supply circuit that steps up according to the comparison result control.
Description
Technical Field
The utility model relates to an insulating oil dielectric strength tester, more specifically say, relate to a novel insulating oil dielectric strength tester.
Background
The insulating oil is widely applied to high-voltage electrical equipment such as transformers, mutual inductors, oil circuit breakers, oil-filled cables, power capacitors, oil sleeves and the like. The insulating oil is gradually deteriorated in performance due to the effects of oxygen, high temperature, high humidity, sunlight, a strong electric field and impurities, so that the insulating effect cannot be sufficiently exerted. For this reason, the insulating oil must be subjected to relevant tests at regular intervals to identify its properties. The quality of the insulating oil is closely related to the breakdown voltage. The insulating oil dielectric strength tester is the most common equipment for testing the insulating property of insulating oil, so whether the test result is accurate or not is very important for the safe operation of electric power equipment.
The insulating oil dielectric strength tester outputs a sinusoidal high voltage power supply to two electrodes of an oil cup (an insulating oil sample to be detected is arranged in the oil cup) through an internal high-voltage transformer, when the voltage at two ends of the electrodes reaches a certain value, a discharge phenomenon can occur between the two electrodes, and the effective value of the voltage at two ends of the electrodes is called the breakdown voltage of the insulating oil sample, so that the main function of the existing insulating oil dielectric strength tester is to detect the breakdown voltage value, after the insulating oil sample is broken down, the moisture in the oil sample can be decomposed and evaporated, the long-chain compound in the oil sample can be decomposed into short-chain compounds or carbon particles can appear, the carbon particles can be mixed into the oil sample to cause the increase or decrease of the withstand voltage value of the oil sample, thus the uncertainty of the measurement of the breakdown voltage value can be increased, and in addition, the physical properties of the broken-down oil sample are changed, the oil-saving device is not suitable for being recycled, and is easy to cause repeated sampling to the equipment with small oil quantity, power failure and oil supplement are needed, and the power supply reliability is reduced.
Disclosure of Invention
Technical problem to be solved by the utility model
An object of the utility model is to overcome foretell not enough, provide a novel insulating oil dielectric strength tester, adopt the technical scheme of the utility model, simple structure, design benefit compares voltage acquisition module to the result of high-pressure side voltage real-time monitoring of high-pressure dry-type transformer and the required minimum breakdown voltage value of high-voltage electrical equipment, controls whether to cut off the supply circuit that steps up according to the comparison result, guarantees that qualified insulating oil appearance can not punctured, can recycle.
2. Technical scheme
In order to achieve the above purpose, the utility model provides a technical scheme does:
the utility model discloses a novel insulating oil dielectric strength tester, including insulating oil dielectric strength tester body, insulating oil dielectric strength tester body include current acquisition module, current acquisition module's output pass through AD converter and CPU control module links to each other, current acquisition module's input links to each other with high-pressure dry-type transformer's low pressure side for carry out real-time supervision to high-pressure dry-type transformer's low pressure side electric current, still include voltage acquisition module, voltage acquisition module's output link to each other with CPU control module, voltage acquisition module's input links to each other with high-pressure dry-type transformer's high-pressure side, is used for carrying out real-time supervision to high-pressure dry-type transformer's high pressure side voltage.
Furthermore, an oil port at the bottom of an oil cup in the insulating oil dielectric strength tester body is respectively communicated with the oil inlet pump and the oil collecting pump through a flowmeter, and the oil inlet pump and the oil collecting pump are both communicated with the oil sample box.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:
(1) the utility model discloses a novel insulating oil dielectric strength tester, it can learn minimum breakdown voltage value according to the grade requirement of different high-voltage electrical equipment to insulating oil at first, then take out insulating oil from high-voltage electrical equipment and to the oil cup in, control insulating oil dielectric strength tester work again, according to voltage acquisition module high-voltage side voltage of high-voltage dry-type transformer and according to current acquisition module low-voltage side current of high-voltage dry-type transformer and carry out real-time monitoring, because the minimum breakdown voltage value has been learned before the detection, therefore cut off the boost power supply circuit when the voltage value that voltage acquisition module obtained equals minimum breakdown voltage value, at this moment look over voltage acquisition module and gather the current value, if the current value does not have great fluctuation, indicate insulating oil is qualified, if the current value fluctuates greatly, indicate insulating oil is unqualified, the qualified insulating oil can be recycled without being broken down when the detection on whether the insulating oil is qualified is finished, the oil is not required to be replenished due to power failure caused by sampling detection, and in addition, if the current value acquired by the voltage acquisition module is larger in fluctuation when the voltage value acquired by the voltage acquisition module is smaller than the lowest breakdown voltage value, the boosting power supply circuit is also cut off at the moment, and the insulating oil is judged to be unqualified;
(2) the utility model discloses a novel insulating oil dielectric strength tester, the hydraulic fluid port of its oil cup bottom pass through the flowmeter respectively with the charge pump, receive the oil pump intercommunication, the charge pump all communicates with oil appearance case with receiving the oil pump, moreover, the steam generator is simple in structure, convenient in connection, control the work of charge pump when needing to detect, take out the insulating oil of oil appearance incasement and send the speed to the oil cup through flowmeter control, after detecting the completion, if insulating oil is qualified, then control and receive the work of charge pump and retrieve the insulating oil in the oil cup to the incasement of oil appearance continuation use, like this not only the sampling test is convenient, and need not to have a power failure because of the sampling test and mend oil.
Drawings
Fig. 1 is the structural schematic diagram of the novel insulating oil dielectric strength tester of the utility model.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Examples
Referring to fig. 1, the novel insulating oil dielectric strength tester of the embodiment comprises an insulating oil dielectric strength tester body, wherein a test control system of the insulating oil dielectric strength tester body is an existing test control system without breakdown protection, and a specific circuit connection structure of the test control system without breakdown protection is specifically described herein, and mainly comprises a CPU control module, a high-voltage dry-type transformer, a current collection module, a motor-driven voltage regulator, a boost voltage parameter setting module, a liquid crystal display module, and a test data printing module, wherein the high-voltage dry-type transformer can be driven by an alternating current reversible motor at a constant speed of 3 kv/sec to boost voltage through the high-voltage dry-type transformer, the high-voltage dry-type transformer outputs a sinusoidal high-voltage power to two electrodes of an oil cup, and an output end of the current collection module is connected with the CPU control module through an a/D converter, the input end of the current acquisition module is connected with the low-voltage side of the high-voltage dry-type transformer and used for monitoring the current of the low-voltage side of the high-voltage dry-type transformer in real time, and the difference lies in that: the output end of the voltage acquisition module is connected with the CPU control module, and the input end of the voltage acquisition module is connected with the high-voltage side of the high-voltage dry-type transformer and used for monitoring the voltage of the high-voltage side of the high-voltage dry-type transformer in real time; firstly, the lowest breakdown voltage value can be obtained according to the requirements of different high-voltage electrical equipment on the grade of insulating oil, then the insulating oil is taken out from the high-voltage electrical equipment and put into an oil cup, then the dielectric strength tester of the insulating oil is controlled to work, the high-voltage side voltage of a high-voltage dry-type transformer is monitored in real time according to a voltage acquisition module, the low-voltage side current of the high-voltage dry-type transformer is monitored in real time according to a current acquisition module, and because the lowest breakdown voltage value is obtained before detection, a boosting power supply circuit is cut off when the voltage value acquired by the voltage acquisition module is equal to the lowest breakdown voltage value, at the moment, the voltage acquisition module is checked to acquire a current value, if the current value has no large fluctuation, the insulating oil is qualified, if the current value has large fluctuation, the insulating oil is unqualified, and the qualified insulating oil can be ensured to be recycled without breakdown, the power failure and oil supplement caused by sampling detection are not needed, and in addition, if the current value acquired by the voltage acquisition module is larger in fluctuation when the voltage value acquired by the voltage acquisition module is smaller than the lowest breakdown voltage value, the boosting power supply circuit is also cut off at the moment, and the unqualified insulating oil is judged;
in order to realize the purposes of convenient sampling detection and no need of power failure and oil supplement due to sampling detection, the oil port at the bottom of the oil cup is respectively communicated with the oil inlet pump and the oil receiving pump through a flowmeter, and the oil inlet pump and the oil receiving pump are both communicated with the oil sample box.
The utility model discloses a novel insulating oil dielectric strength tester, simple structure, design benefit compares voltage acquisition module to the required minimum breakdown voltage value of high-voltage electrical equipment's of the real-time result of monitoring of high-pressure side voltage of high-pressure dry-type transformer and high voltage electrical equipment, controls whether to cut off the supply circuit that steps up according to the comparison result, guarantees that qualified insulating oil appearance can not punctured, can recycle.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (2)
1. The utility model provides a novel insulating oil dielectric strength tester, includes insulating oil dielectric strength tester body, insulating oil dielectric strength tester body include current acquisition module, current acquisition module's output pass through the AD converter and link to each other with CPU control module, current acquisition module's input links to each other with the low pressure side of high-pressure dry-type transformer for carry out real-time supervision, its characterized in that to the low pressure side electric current of high-pressure dry-type transformer: the output end of the voltage acquisition module is connected with the CPU control module, and the input end of the voltage acquisition module is connected with the high-voltage side of the high-voltage dry-type transformer and used for monitoring the voltage of the high-voltage side of the high-voltage dry-type transformer in real time.
2. The novel insulating oil dielectric strength tester as claimed in claim 1, wherein: the oil port at the bottom of the oil cup in the insulating oil dielectric strength tester body is respectively communicated with the oil inlet pump and the oil collecting pump through a flowmeter, and the oil inlet pump and the oil collecting pump are both communicated with the oil sample box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020742867.5U CN212483747U (en) | 2020-05-08 | 2020-05-08 | A new type of insulating oil dielectric strength tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020742867.5U CN212483747U (en) | 2020-05-08 | 2020-05-08 | A new type of insulating oil dielectric strength tester |
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| Publication Number | Publication Date |
|---|---|
| CN212483747U true CN212483747U (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020742867.5U Expired - Fee Related CN212483747U (en) | 2020-05-08 | 2020-05-08 | A new type of insulating oil dielectric strength tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116125147A (en) * | 2022-11-22 | 2023-05-16 | 西南交通大学 | An evaluation method for insulating materials of dry-type transformers in high-temperature and high-humidity environments |
-
2020
- 2020-05-08 CN CN202020742867.5U patent/CN212483747U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116125147A (en) * | 2022-11-22 | 2023-05-16 | 西南交通大学 | An evaluation method for insulating materials of dry-type transformers in high-temperature and high-humidity environments |
| CN116125147B (en) * | 2022-11-22 | 2024-01-16 | 西南交通大学 | An evaluation method for dry-type transformer insulation materials in high-temperature and high-humidity environments |
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Granted publication date: 20210205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |