CN201562033U - Microcomputer control insulating oil dielectric strength testing device - Google Patents
Microcomputer control insulating oil dielectric strength testing device Download PDFInfo
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- CN201562033U CN201562033U CN2009202892366U CN200920289236U CN201562033U CN 201562033 U CN201562033 U CN 201562033U CN 2009202892366 U CN2009202892366 U CN 2009202892366U CN 200920289236 U CN200920289236 U CN 200920289236U CN 201562033 U CN201562033 U CN 201562033U
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Abstract
The utility model relates to the technical field of power transformer testing instruments, in particular to a microcomputer control insulating oil dielectric strength testing device, which comprises a single chip microcomputer control measuring unit, a motor driving boost control unit, a rapid oil breakdown signal extraction unit, an oil breakdown voltage sampling unit and a data liquid crystal displaying and printing unit. Particularly, the rapid oil breakdown signal extraction unit is electrically connected with the oil breakdown voltage sampling unit and the single chip microcomputer control measuring unit, thereby realizing rapidly locking and recording a breakdown voltage value of insulating oil breakdown moment. The microcomputer control insulating oil dielectric strength testing device has the advantages of small system volume, accurate testing data, high reliability, strong anti-interference capability and realization of measuring process automation by using single chip microcomputer software.
Description
Technical field
The utility model relates to power transformer testing tool technical field, relates in particular to a kind of system controlled by computer dielectric oil dielectrical strength proving installation.
Background technology
In power equipment, insulating oil is a kind of insulation dielectric that is widely used in the power transformer.The work operation characteristic of whole the transformer of good and bad directly influence of transformer oil performance, its dielectric strength is a most important insulating property index, it has reflected the order of severity that whether exists moisture, impurity and electrically conductive particles and them that insulating oil is influenced in the oil, not only to test for guaranteeing the transformer safe operation fresh oil, and various impurity increase in the transformer oil in service, cause decreasing insulating, even can cause shelf depreciation, therefore, also to regularly test and be used for judging whether to meet insulating requirements in service oil.
The utility model content
The purpose of this utility model provides a kind of system controlled by computer dielectric oil dielectrical strength proving installation, is used for testing the insulation dielectric strength of power transformer insulating oil.
For achieving the above object, the utility model adopts following technical scheme:
Boost control module, fluid breakdown signal rapid extraction unit, fluid voltage breakdown sampling unit, Single-chip Controlling measuring unit, data liquid crystal display and print unit of motor-driven boost control module, fluid breakdown signal rapid extraction unit, fluid voltage breakdown sampling unit, Single-chip Controlling measuring unit, data liquid crystal display and print unit, described motor-driven is electrically connected successively.
Described Single-chip Controlling measuring unit adopts the 8XC196KC chip to constitute, described fluid breakdown signal rapid extraction unit adopts photoelectricity to isolate 521-2 chip, triode T1, rest-set flip-flop formation, and described fluid voltage breakdown sampling unit adopts sampling transformer, rectifier bridge, high bandwidth amplifier TL062 to constitute.
Current sampling signal is after filtering, connect photoelectricity and isolate 521-2 chip the 1st pin, isolate the 5th pin output of 521-2 chip by photoelectricity, connect the 2nd pin that constitutes rest-set flip-flop by rejection gate, the 4th pin output from rest-set flip-flop, connect the input of rejection gate the 8th pin, by positive pulse signal JCREL of rejection gate the 10th pin output, positive pulse signal JCREL meets the 24th pin HSI.0 of single-chip microcomputer 8XC196KC chip, import as single-chip microcomputer external interrupt trigger pip, cause the execution of singlechip interruption service subprogram, make the stepup transformer output voltage return zero by the counter-rotating of Single-chip Controlling servomotor.
The pressure regulator that boosts output is connected to sampling transformer, sampling voltage after the step-down connects rectifier bridge the 1st pin and the 2nd pin, sampling voltage from rectifier bridge the 4th pin output direct current, this direct current sampling voltage carries out exporting behind the active integration of two-stage, the smothing filtering through high bandwidth amplifier TL062, insert single-chip microcomputer 8XC196KC chip the 11st pin ACH4 input again, 10 A/D converters by single-chip microcomputer sheet inside are used for converting voltage breakdown to digital quantity, and record fluid punctures breakdown voltage value constantly.
Trial voltage produces part and is made up of step-up transformer, automatic coupling voltage regulator, servomotor and driving power thereof, the centre tap of driven by servomotor automatic coupling voltage regulator controller provides the input voltage of 0～220V for step-up transformer, step-up transformer output 0～60kV, the rotating of servomotor is by Single-chip Controlling, and its rate of pressure rise is controlled at 3kV/s ± 10%.
The utlity model has following advantage and good effect:
1) system bulk is little, test data is accurate, reliability is high, and antijamming capability is strong, utilizes scm software to realize its measuring process robotization;
2) automaticity and the test data accuracy of instrument have been improved.
Description of drawings
Fig. 1 is a system architecture diagram of the present utility model.
Fig. 2 is the motor-driven of the present utility model control unit circuit schematic diagram that boosts.
Fig. 3 is the rapid extraction element circuit schematic diagram of fluid breakdown signal of the present utility model.
Fig. 4 is fluid voltage breakdown sampling unit circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail in conjunction with the accompanying drawings with specific embodiment below:
The system controlled by computer dielectric oil dielectrical strength proving installation that the utility model provides, the following technical scheme of concrete employing, referring to Fig. 1, mainly form, and boost control module 1, fluid breakdown signal rapid extraction unit 2, fluid voltage breakdown sampling unit 3, Single-chip Controlling measuring unit 4, data liquid crystal display and print unit 5 of motor-driven is electrically connected successively by boost control module 1, fluid breakdown signal rapid extraction unit 2, fluid voltage breakdown sampling unit 3, Single-chip Controlling measuring unit 4, data liquid crystal display and print unit 5 of motor-driven.
Trial voltage produces part and is made up of step-up transformer, automatic coupling voltage regulator, servomotor and driving power thereof, referring to Fig. 2, the centre tap of driven by servomotor automatic coupling voltage regulator controller provides the input voltage of 0～220V for step-up transformer, step-up transformer output 0～60kV, the rotating of servomotor is by Single-chip Controlling, and its rate of pressure rise is controlled at 3kV/s ± 10%.
When fluid was breakdown under the high pressure effect, the transient voltage that liquid crystal display shows will be by quick lock in (conveniently to read breakdown voltage value), and system should in time stop to boost and extracting breakdown signal and send single-chip microcomputer automatically.
May bring strong jamming in order to overcome direct extraction breakdown signal, referring to Fig. 3, adopt the current sampling mode in the design, current sampling signal is after filtering, connect photoelectricity and isolate 521-2 chip the 1st pin, isolate the 5th pin output of 521-2 chip by photoelectricity, connect the 2nd pin that constitutes rest-set flip-flop by rejection gate, the 4th pin output from rest-set flip-flop, connect the input of rejection gate the 8th pin, by rejection gate the 10th a pin output positive pulse signal JCREL (insulating oil breakdown signal), positive pulse signal JCREL meets the 24th pin HSI.0 of single-chip microcomputer 8XC196KC chip, as the input of single-chip microcomputer external interrupt trigger pip, cause the execution of singlechip interruption service subprogram, make the stepup transformer output voltage return zero by the counter-rotating of Single-chip Controlling servomotor.
Single-chip Controlling measuring unit and fluid voltage breakdown sampling unit, fluid voltage breakdown sampling unit adopts sampling transformer, rectifier bridge, high bandwidth amplifier TL062, its electric connecting relation is referring to Fig. 4, the pressure regulator that boosts output is connected to sampling transformer, sampling voltage after the step-down connects rectifier bridge the 1st pin and the 2nd pin, sampling voltage from rectifier bridge the 4th pin output direct current, this direct current sampling voltage is carried out the active integration of two-stage through high bandwidth amplifier TL062, export behind the smothing filtering, insert single-chip microcomputer 8XC196KC chip the 11st pin ACH4 input again, 10 A/D converters by single-chip microcomputer sheet inside are used for converting voltage breakdown to digital quantity, and record fluid punctures breakdown voltage value constantly.
Single-chip microcomputer 8XC196KC is the acp chip of tester, the sampling value of fluid voltage breakdown sampling unit is by the ACH4 input of P0 mouth, 10 A/D converters by single-chip microcomputer sheet inside are used for converting voltage breakdown to digital quantity, and whether program employing interrupt mode is declared the A/D conversion and finished; The data that show and print are by P1, P3 and P4 mouth liquor charging crystalline substance and printer; Insulating oil breakdown signal JCREL meets the HSI.0 of single-chip microcomputer as look-at-me; The driven by servomotor control signal is from the HSO.0 and the HSO.1 output of single-chip microcomputer, through photoelectricity isolating amplifier circuit rear drive servomotor; Also by the P0 mouth keyboard is set in the system and is used for input of control commands and data, the data of input have rate of rise, date, sample batch etc.
Its test process is: insulating oil sample to be measured is put in the test lubricating cup, apply power frequency ac voltage by high-field electrode, progressively increase magnitude of voltage, breakdown or boost and reach experimental voltage maximal value (60kV) up to insulating oil, thus record insulating oil dielectric strength.
The utility model adopts the single-chip microcomputer of 8XC196KC model, and it is made up of primary control program, interrupt service subroutine and function subprogram, the multiprogramming parallel organization that adopt primary control program scan round and event interrupt, regularly interrupts.Primary control program is controlled whole measuring process, and event interrupt has with the insulating oil breakdown signal or boosts that to reach limited signal be that the HSI.0 of interrupt source interrupts, and A/D converts the interruption that causes.Primary control program carries out self check and initialization earlier behind the system boot, and interrupt mode is set, to timer T1 and T2 initialization, scan message from keyboard then, input of control commands and parameter stir circuit, the oil in the stirring test cup by the program start drive motor, behind the static 1min, servomotor control pressure regulator evenly boosts, and the A/D conversion is carried out continuously, in A/D conversion interrupt service subroutine, read the A/D transformation result, and starting conversion next time.Primary control program constantly converts the A/D conversion value to then that the decimal number liquor charging is brilliant to be shown, follows the tracks of the voltage between high-field electrode simultaneously, and is breakdown or boost and reach in limited time when insulating oil, causes the HSI.0 interruption.The rank that HSI.0 interrupts is the highest, and single-chip microcomputer makes an immediate response, and enters interrupt service subroutine, stops the A/D conversion, and the counter-rotating of control servomotor makes the stepup transformer output voltage return zero, time-delay back system reset.Restart next time and to measure,, to reduce experimental error, should get the arithmetic mean of the breakdown voltage value of 6 METHOD FOR CONTINUOUS DETERMINATION, as the average voltage breakdown value for overcoming inhomogeneous that contained humidity and impurity may occur in the oil.Test data is analyzed and calculated to primary control program, with brilliant demonstration of liquor charging as a result and printing.The transformer oil of high voltage substation takes oil sample and tests by GB GB507-88.
The average voltage breakdown of formation testing (kV) V=(V
1+ V
2+ ... + V
9)/6
The dielectric strength E=V/d of formation testing
In the formula: E-dielectric oil dielectrical strength, kV/cm;
The average voltage breakdown of V-formation testing, kV;
The standard clearance of d-electrode, d=0.25cm.
Claims (5)
1. a system controlled by computer dielectric oil dielectrical strength proving installation is characterized in that, comprising:
Boost control module (1), fluid breakdown signal rapid extraction unit (2), fluid voltage breakdown sampling unit (3), Single-chip Controlling measuring unit (4), data liquid crystal display and print unit (5) of motor-driven boost control module (1), fluid breakdown signal rapid extraction unit (2), fluid voltage breakdown sampling unit (3), Single-chip Controlling measuring unit (4), data liquid crystal display and print unit (5), described motor-driven is electrically connected successively.
2. system controlled by computer dielectric oil dielectrical strength proving installation according to claim 1 is characterized in that:
Described Single-chip Controlling measuring unit adopts the 8XC196KC chip to constitute, described fluid breakdown signal rapid extraction unit adopts photoelectricity to isolate 521-2 chip, triode T1, rest-set flip-flop formation, and described fluid voltage breakdown sampling unit adopts sampling transformer, rectifier bridge, high bandwidth amplifier TL062 to constitute.
3. system controlled by computer dielectric oil dielectrical strength proving installation according to claim 2 is characterized in that:
Current sampling signal is after filtering, connect photoelectricity and isolate 521-2 chip the 1st pin, isolate the 5th pin output of 521-2 chip by photoelectricity, connect the 2nd pin that constitutes rest-set flip-flop by rejection gate, the 4th pin output from rest-set flip-flop, connect the input of rejection gate the 8th pin, by positive pulse signal JCREL of rejection gate the 10th pin output, positive pulse signal JCREL meets the 24th pin HSI.0 of single-chip microcomputer 8XC196KC chip, import as single-chip microcomputer external interrupt trigger pip, cause the execution of singlechip interruption service subprogram, make the stepup transformer output voltage return zero by the counter-rotating of Single-chip Controlling servomotor.
4. according to claim 2 or 3 described system controlled by computer dielectric oil dielectrical strength proving installations, it is characterized in that:
The pressure regulator that boosts output is connected to sampling transformer, sampling voltage after the step-down connects rectifier bridge the 1st pin and the 2nd pin, sampling voltage from rectifier bridge the 4th pin output direct current, this direct current sampling voltage carries out exporting behind the active integration of two-stage, the smothing filtering through high bandwidth amplifier TL062, insert single-chip microcomputer 8XC196KC chip the 11st pin ACH4 input again, 10 A/D converters by single-chip microcomputer sheet inside are used for converting voltage breakdown to digital quantity, and record fluid punctures breakdown voltage value constantly.
5. system controlled by computer dielectric oil dielectrical strength proving installation according to claim 1 and 2 is characterized in that:
Trial voltage produces part and is made up of step-up transformer, automatic coupling voltage regulator, servomotor and driving power thereof, the centre tap of driven by servomotor automatic coupling voltage regulator controller provides the input voltage of 0～220V for step-up transformer, step-up transformer output 0～60kV, the rotating of servomotor is by Single-chip Controlling, and its rate of pressure rise is controlled at 3kV/s ± 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202892366U CN201562033U (en) | 2009-12-14 | 2009-12-14 | Microcomputer control insulating oil dielectric strength testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202892366U CN201562033U (en) | 2009-12-14 | 2009-12-14 | Microcomputer control insulating oil dielectric strength testing device |
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| CN201562033U true CN201562033U (en) | 2010-08-25 |
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| CN2009202892366U Expired - Fee Related CN201562033U (en) | 2009-12-14 | 2009-12-14 | Microcomputer control insulating oil dielectric strength testing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435925A (en) * | 2011-11-21 | 2012-05-02 | 中国人民解放军国防科学技术大学 | Device and method for measuring electrical strength of material under stress condition |
| CN102788937A (en) * | 2011-05-19 | 2012-11-21 | 上海华明电力设备制造有限公司 | Device for monitoring electric strength of insulating oil medium for on-load tapping switch on line |
| CN104280711A (en) * | 2014-10-23 | 2015-01-14 | 国家电网公司 | Device and method for calibrating break time of insulating oil dielectric strength tester |
| CN106771916A (en) * | 2016-12-16 | 2017-05-31 | 上海欧秒电力监测设备有限公司 | Power high voltage oil-filled equipment dielectric oil dielectrical strength on-Line Monitor Device |
| RU172345U1 (en) * | 2016-11-17 | 2017-07-04 | Общество с ограниченной ответственностью "СКБ Медрентех" | DEVICE FOR TESTING TRANSFORMER OIL |
| RU2798767C1 (en) * | 2022-11-17 | 2023-06-27 | Государственное образовательное учреждение высшего профессионального образования Кыргызско-Российский Славянский университет (КРСУ) | Method of quality control of transformer oil during operation |
-
2009
- 2009-12-14 CN CN2009202892366U patent/CN201562033U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788937A (en) * | 2011-05-19 | 2012-11-21 | 上海华明电力设备制造有限公司 | Device for monitoring electric strength of insulating oil medium for on-load tapping switch on line |
| CN102788937B (en) * | 2011-05-19 | 2014-09-17 | 上海华明电力设备制造有限公司 | Device for monitoring electric strength of insulating oil medium for on-load tapping switch on line |
| CN102435925A (en) * | 2011-11-21 | 2012-05-02 | 中国人民解放军国防科学技术大学 | Device and method for measuring electrical strength of material under stress condition |
| CN102435925B (en) * | 2011-11-21 | 2013-08-28 | 中国人民解放军国防科学技术大学 | Device and method for measuring electrical strength of material under stress condition |
| CN104280711A (en) * | 2014-10-23 | 2015-01-14 | 国家电网公司 | Device and method for calibrating break time of insulating oil dielectric strength tester |
| RU172345U1 (en) * | 2016-11-17 | 2017-07-04 | Общество с ограниченной ответственностью "СКБ Медрентех" | DEVICE FOR TESTING TRANSFORMER OIL |
| CN106771916A (en) * | 2016-12-16 | 2017-05-31 | 上海欧秒电力监测设备有限公司 | Power high voltage oil-filled equipment dielectric oil dielectrical strength on-Line Monitor Device |
| CN106771916B (en) * | 2016-12-16 | 2019-03-29 | 上海欧秒电力监测设备有限公司 | Power high voltage oil-filled equipment dielectric oil dielectrical strength on-Line Monitor Device |
| RU2798767C1 (en) * | 2022-11-17 | 2023-06-27 | Государственное образовательное учреждение высшего профессионального образования Кыргызско-Российский Славянский университет (КРСУ) | Method of quality control of transformer oil during operation |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20121214 |