CN103941122B - A kind of Multifunction transformer test comprehensive test device - Google Patents
A kind of Multifunction transformer test comprehensive test device Download PDFInfo
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- CN103941122B CN103941122B CN201410139736.7A CN201410139736A CN103941122B CN 103941122 B CN103941122 B CN 103941122B CN 201410139736 A CN201410139736 A CN 201410139736A CN 103941122 B CN103941122 B CN 103941122B
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000002955 isolation Methods 0.000 claims abstract description 18
- 230000005347 demagnetization Effects 0.000 claims abstract description 17
- 239000013078 crystal Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 9
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 238000013480 data collection Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Abstract
A kind of Multifunction transformer test comprehensive test device, main by working power, data collecting system, cpu system, operation interface, power supply output control system, relay system and binding post composition, wherein data collecting system includes load collection, impedance collection and directly hinder collection, it is characterized in that: described data collecting system is additionally provided with demagnetization collection, demagnetization acquisition system is contacted by serial ports and cpu system, there are three AD conversion chip, each AD conversion chip is provided with AD7705 analog-digital converter, serial input/output isolation circuit, power isolation circuit, crystal oscillating circuit, reference voltage source circuit and analog signal input circuit, the present invention is by increasing demagnetization acquisition system, the unification achieving four test equipments of Transformer Winding uses, and decreases space hold and the number of times of the upper and lower transformator of testing staff, has ensured personal safety, remanent magnetism within quick eliminating transformer, improves work efficiency.
Description
Technical field
The present invention relates to a kind of transformator detecting device, especially a kind of Multifunction transformer test comprehensive test device.
Background technology
China's power industry requires, when transformator interruption maintenance, new transformator check, the investigation fault that has a power failure, the pilot projects such as winding D.C. resistance, low-voltage short-circuit impedance, load ratio bridging switch characteristic and winding demagnetization to be tested. Winding D.C. resistance, low-voltage short-circuit impedance, load ratio bridging switch characteristic and demagnetization are four the independent pilot projects that must do, current domestic test instrunment manufacturer is both for the single testing equipment that each pilot project produces, it does not have comprehensive test device. Thus causing testing crew must carry multiple testing equipment and dependence test circuit thereof simultaneously, repeat upper and lower transformator and test, labor intensity is big, hazard index is high, equipment and materials waste is serious, and plurality of devices takies substantial amounts of work space, affects detection efficiency.
Summary of the invention
Present invention aim to solve testing crew when transformator being detected by existing method, carry multiple detection equipment, cause the waste of equipment and materials, take substantial amounts of work space, and repeat the problems such as test brings up and down labor intensity increase, hazard index raising, it is provided that a kind of Multifunction transformer test comprehensive test device.
The concrete scheme of the present invention is: a kind of Multifunction transformer test comprehensive test device, is mainly made up of working power, data collecting system, cpu system, operation interface, power supply output control system, relay system and binding post;Whole device adopts a set of working power, provides required power supply for test function; Cpu system is contacted by serial ports with data collecting system and operation interface, the switching of cpu system management data collection system, switching and the output of power supply output control system, the Phase-switching of relay system and AC/DC output, and it is operated by interface finishing man-machine interaction work; Data collecting system includes load collection, impedance collection and directly hinders collection, it is characterized in that: described data collecting system is additionally provided with demagnetization collection, demagnetization acquisition system contacts again by serial ports and cpu system, having three AD conversion chip, each AD conversion chip is provided with AD7705 analog-digital converter, serial input/output isolation circuit, power isolation circuit, crystal oscillating circuit, reference voltage source circuit and analog signal input circuit.
Chip select/the CS of heretofore described AD7705 analog-digital converter, No. 2 differential paths AIN2+, AIN2-, the equal ground connection of pin of negative terminal reference voltage REFN-and reference point of potential GND; The pin of the voltage VDD and reset/RSSET of AD7705 analog-digital converter connects+5V DC source.
Heretofore described power isolation circuit is made up of full-controlled rectifier bridge and 7805 power module of voltage regulation U1, and the ac input end of described full-controlled rectifier bridge is connected with binding post J1, and its DC output end connects input pin 1 and the grounding pin 2 of power module of voltage regulation; It is parallel with high-frequency filter capacitor E7 between input pin 1 and the grounding pin 2 of 7805 power module of voltage regulation U1, between output pin 3 and the grounding pin 2 of 7805 power module of voltage regulation U1, is parallel with high-frequency filter capacitor E8, E9 and electric capacity C16, C17, C18, C19 respectively; The output pin 3 of 7805 power module of voltage regulation U1 is connected with+5V voltage VDD the pin of AD7705 analog-digital converter.
Heretofore described crystal oscillating circuit inputs MCLKIN and master clock output MCLKOUT and is connected with the master clock of AD7705 analog-digital converter, by resistance R36 and quartz crystal, and electric capacity C14, C15 composition, wherein the clock frequency of quartz crystal is 2MHZ.
Heretofore described reference voltage source circuit includes chip AD780BR, the benchmark input end of AD780BR and reference output decoupling capacitor E6, C12 and E5 in parallel, C11 respectively, wherein benchmark input end connects+5V DC source, and reference output is connected to the REFIN+ pin of AD7705 analog-digital converter.
Heretofore described serial input/output isolation circuit includes serial clock input circuit, serial date transfer circuit and serial data output circuit, is wherein in series with photoisolator 6N137 respectively in the circuit of Zhe tri-road.
Heretofore described analog signal input circuit has a terminal J2 including 4 input signal channels; it is in series with divider resistance R25, R26 between No. 1 of described terminal and No. 2 passages; No. 3 with No. 4 passages respectively through current-limiting resistance R27 and R28 that connects, be connected to No. 1 Differential Input passage of AD7705 analog-digital converter and obtain on two pin AIN+ and AIN-; Switched over by the contact of relay K M6 between No. 3 passages and 1,2 passages, and simulate input negative terminal AIN-be connected on reference voltage V REF.
Owing to adding demagnetization acquisition system in the present invention, achieve the unification to pilot project test equipment such as Transformer Winding D.C. resistance, winding demagnetization, low-voltage short-circuit impedance, load ratio bridging switch characteristics to use, so not only save raw-material use, reduce taking of work space, and decrease the number of times of the upper and lower transformator of testing staff, reduce labor intensity, increase personal safety factor, can quickly eliminate the remanent magnetism in large-scale power transformer, improve work effect;And in demagnetization acquisition system, add isolated from power and photoelectric isolation module, it is ensured that the anti-interference of demagnetization acquisition system, improve the accuracy of testing inspection project testing.
Accompanying drawing explanation
Fig. 1 is circuit overall block diagram of the present invention;
Fig. 2 is the circuit theory diagrams of demagnetization acquisition system AD conversion chip;
In figure: 1 AD7705 analog-digital converter, 2 serial inputs/output isolation circuit, 3 power isolation circuits, 4 crystal oscillating circuits, 5 reference voltage source circuits, 6 analog signal input circuits, 7 serial clock input circuits, 8 serial date transfer circuit, 9 serial data output circuits.
Detailed description of the invention
Referring to Fig. 1,2, plant Multifunction transformer test comprehensive test device, be mainly made up of working power, data collecting system, cpu system, operation interface, power supply output control system, relay system and binding post; Whole device adopts a set of working power, provides required power supply for test function; Cpu system is contacted by serial ports with data collecting system and operation interface, the switching of cpu system management data collection system, switching and the output of power supply output control system, the Phase-switching of relay system and AC/DC output, and it is operated by interface finishing man-machine interaction work; Data collecting system includes load collection, impedance collection and directly hinders collection, it is characterized in that: described data collecting system is additionally provided with demagnetization collection, demagnetization acquisition system contacts again by serial ports and cpu system, having three AD conversion chip, each AD conversion chip is provided with AD7705 analog-digital converter 1, serial input/output isolation circuit 2, power isolation circuit 3, crystal oscillating circuit 4, reference voltage source circuit 5 and analog signal input circuit 6.
Chip select/the CS of AD7705 analog-digital converter described in the present embodiment 1, No. 2 differential paths AIN2+, AIN2-, the equal ground connection of pin of negative terminal reference voltage REFN-and reference point of potential GND; The pin of the voltage VDD and reset/RSSET of AD7705 analog-digital converter 1 connects+5V DC source; During energising, input pin/RESET is in low level, all of logic that resets, data filter and simulative debugging device, and all of interior depositor is arranged its default conditions.
Power isolation circuit 3 described in the present embodiment is made up of full-controlled rectifier bridge and 7805 power module of voltage regulation U1, the ac input end of described full-controlled rectifier bridge is connected with binding post J1, and its DC output end connects input pin 1 and the grounding pin 2 of power module of voltage regulation; It is parallel with high-frequency filter capacitor E7 between input pin 1 and the grounding pin 2 of 7805 power module of voltage regulation U1, between output pin 3 and the grounding pin 2 of 7805 power module of voltage regulation U1, is parallel with high-frequency filter capacitor E8, E9 and electric capacity C16, C17, C18, C19 respectively; The output pin 3 of 7805 power module of voltage regulation U1 is connected with+5V voltage VDD the pin of AD7705 analog-digital converter; Described full-controlled rectifier bridge will be the alternating current of 8V from terminal J1 voltage, being converted to the unidirectional current of 11V, be input to 7805 power module of voltage regulation U1,7805 power module of voltage regulation U1 export+5V unidirectional current, after High frequency filter, it is inputted to AD7705 analog-digital converter; Voltage isolation module eliminates the external interference signals interference to AD conversion module internal control function.
Crystal oscillating circuit 4 described in the present embodiment inputs MCLKIN and master clock output MCLKOUT and is connected with the master clock of AD7705 analog-digital converter 1, by resistance R36 and quartz crystal, and electric capacity C14, C15 composition, wherein the clock frequency of quartz crystal is 2MHZ;The master clock signal that this circuit provides clock frequency to be 2MHZ for AD7705 analog-digital converter 1.
Reference voltage source circuit 5 described in the present embodiment includes chip AD780BR, the benchmark input end of AD780BR and reference output decoupling capacitor E6, C12 and E5 in parallel, C11 respectively, wherein benchmark input end connects+5V DC source, reference output is connected to the REFIN+ pin of AD7705 analog-digital converter, provides the reference voltage of 2.5V for analog-digital converter 1.
Serial input/output isolation circuit 2 described in the present embodiment includes serial clock input circuit 7, serial date transfer circuit 8 and serial data output circuit 9, is wherein in series with photoisolator 6N137 respectively in the circuit of Zhe tri-road; In described serial clock input circuit 7, the next input signal to cpu system is through audion N7 series limiting resistor R34, it is connected with the 2 foot inputs of photoisolator IC18,8 feet of photoisolator connect+5V unidirectional current, connect between 6 foot outfans and 8 feet pull-up resistor R35, and its 6 foot outfans connect the serial clock input pin SCLK of AD7705 through inverter ic 15A; Described serial date transfer circuit 8 is identical with serial clock input circuit 7 connected mode, and the signal that inputs to cpu system is input to the serial date transfer pin DIN of AD7705 by this circuit; In described serial data output circuit 9, AD7705 serial data output pin, it is sequentially connected with inverter ic 15C, audion N9 and current-limiting resistance respectively and is connected with 2 foot inputs of photoisolator, 6 foot outfans of photoisolator are connected with cpu system.
Input/output signal between AD analog-digital converter 1 and cpu system is carried out Phototube Coupling by photoisolator described in the present embodiment, greatly increase the sound of system to make an uproar ratio, input/output signal is played good buffer action, it is to avoid the system noise interference to AD circuit.
Analog signal input circuit 6 described in the present embodiment has a terminal J2 including 4 input signal channels; it is in series with divider resistance R25, R26 between No. 1 of described terminal and No. 2 passages; No. 3 with No. 4 passages respectively through current-limiting resistance R27 and R28 that connects, be connected to No. 1 Differential Input passage of AD7705 analog-digital converter and obtain on two pin AIN+ and AIN-; Switched over by the contact of relay K M6 between No. 3 passages and 1,2 passages, and simulate input negative terminal AIN-be connected on reference voltage V REF. Described analog input circuit achieves collection and the conversion of the multiple input signals such as voltage, electric current and resistance.
Three AD conversion chip of demagnetization acquisition system described in the present embodiment realize three road voltages and the collection of three road electric currents jointly.
Claims (3)
1. a Multifunction transformer test comprehensive test device, is mainly made up of working power, data collecting system, cpu system, operation interface, power supply output control system, relay system and binding post; Whole device adopts a set of working power, provides required power supply for test function; Cpu system is contacted by serial ports with data collecting system and operation interface, the switching of cpu system management data collection system, switching and the output of power supply output control system, the Phase-switching of relay system and AC/DC output, and it is operated by interface finishing man-machine interaction work; Data collecting system includes load collection, impedance collection and directly hinders collection, it is characterized in that: described data collecting system is additionally provided with demagnetization collection, demagnetization collection contacts again by serial ports and cpu system, having three AD conversion chip, each AD conversion chip is provided with AD7705 analog-digital converter, serial input/output isolation circuit, power isolation circuit, crystal oscillating circuit, reference voltage source circuit and analog signal input circuit;Chip select/the CS of described AD7705 analog-digital converter, No. 2 differential paths AIN2+, AIN2-, the equal ground connection of pin of negative terminal reference voltage REFN-and reference point of potential GND, the pin of the voltage VDD and reset/RSSET of AD7705 analog-digital converter connects+5V DC source; Described power isolation circuit is made up of full-controlled rectifier bridge and 7805 power module of voltage regulation U1, and the ac input end of described full-controlled rectifier bridge is connected with binding post J1, and its DC output end connects input pin 1 and the grounding pin 2 of power module of voltage regulation; It is parallel with high-frequency filter capacitor E7 between input pin 1 and the grounding pin 2 of 7805 power module of voltage regulation U1, between output pin 3 and the grounding pin 2 of 7805 power module of voltage regulation U1, is parallel with high-frequency filter capacitor E8, E9 and electric capacity C16, C17, C18, C19 respectively; The output pin 3 of 7805 power module of voltage regulation U1 is connected with+5V voltage VDD the pin of AD7705 analog-digital converter; Described reference voltage source circuit includes chip AD780BR, the benchmark input end of AD780BR and reference output decoupling capacitor E6, C12 and E5 in parallel, C11 respectively, wherein benchmark input end connects+5V DC source, and reference output is connected to the REFIN+ pin of AD7705 analog-digital converter; Described serial input/output isolation circuit includes serial clock input circuit, serial date transfer circuit and serial data output circuit, is wherein in series with photoisolator 6N137 respectively in the circuit of Zhe tri-road.
2. a kind of Multifunction transformer test comprehensive test device according to claim 1, it is characterized in that: described crystal oscillating circuit inputs MCLKIN and master clock output MCLKOUT and is connected with the master clock of AD7705 analog-digital converter, by resistance R36 and quartz crystal, and electric capacity C14, C15 composition, wherein the clock frequency of quartz crystal is 2MHZ.
3. a kind of Multifunction transformer test comprehensive test device described in a claim 1; it is characterized in that: described analog signal input circuit has a terminal J2 including 4 input signal channels; it is in series with divider resistance R25, R26 between No. 1 of described terminal and No. 2 passages; No. 3 with No. 4 passages respectively through current-limiting resistance R27 and R28 that connects, be connected to No. 1 Differential Input passage of AD7705 analog-digital converter and obtain on two pin AIN+ and AIN-; Switched over by the contact of relay K M6 between No. 3 passages and 1,2 passages, and simulate input negative terminal AIN-be connected on reference voltage V REF.
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| CN201410139736.7A CN103941122B (en) | 2014-04-04 | 2014-04-04 | A kind of Multifunction transformer test comprehensive test device |
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| CN201410139736.7A CN103941122B (en) | 2014-04-04 | 2014-04-04 | A kind of Multifunction transformer test comprehensive test device |
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| CN103941122B true CN103941122B (en) | 2016-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2778977C1 (en) * | 2021-11-26 | 2022-08-29 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Томский государственный университет систем управления и радиоэлектроники" | Complex for automated measurement and control of parameters of high-frequency transformers |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105093140B (en) * | 2015-08-19 | 2018-03-20 | 国网四川省电力公司阿坝供电公司 | A kind of method and its device of the detection of transformer remanent magnetism and demagnetization |
| CN105699752A (en) * | 2016-02-29 | 2016-06-22 | 国网山东省电力公司青岛供电公司 | Sampling device |
| CN108333448A (en) * | 2018-01-09 | 2018-07-27 | 国网安徽省电力公司阜阳供电公司 | Transformer routine test comprehensive test device |
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| CN203849337U (en) * | 2014-04-04 | 2014-09-24 | 国家电网公司 | Comprehensive multifunctional transformer testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05111141A (en) * | 1991-10-15 | 1993-04-30 | Tokyo Gas Co Ltd | Relay testing device |
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|---|---|---|---|---|
| CN102565562A (en) * | 2010-12-31 | 2012-07-11 | 上海市电力公司 | Comprehensive testing device for electrical test of transformer |
| CN102636715A (en) * | 2012-04-19 | 2012-08-15 | 湖北中试电力科技有限公司 | Integrated electrical test comprehensive testing system |
| CN203054090U (en) * | 2012-12-27 | 2013-07-10 | 江苏省电力公司电力科学研究院 | Vehicle-mounted integrated three-phase direct-current resistance, transformation ratio and load comprehensive testing device |
| CN203849337U (en) * | 2014-04-04 | 2014-09-24 | 国家电网公司 | Comprehensive multifunctional transformer testing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2778977C1 (en) * | 2021-11-26 | 2022-08-29 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Томский государственный университет систем управления и радиоэлектроники" | Complex for automated measurement and control of parameters of high-frequency transformers |
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