CN103278705A - Multifunctional variable ratio electric bridge tester and testing method - Google Patents
Multifunctional variable ratio electric bridge tester and testing method Download PDFInfo
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- CN103278705A CN103278705A CN2013101812971A CN201310181297A CN103278705A CN 103278705 A CN103278705 A CN 103278705A CN 2013101812971 A CN2013101812971 A CN 2013101812971A CN 201310181297 A CN201310181297 A CN 201310181297A CN 103278705 A CN103278705 A CN 103278705A
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Abstract
The invention discloses a multifunctional variable ratio electric bridge tester and a variable ratio electric bridge testing method. The tester comprises a variable ratio electric bridge, a plurality of capacitive voltage transformers, a multi-channel analogue/digital (A/D) converter and a central processing unit (CPU) chip, wherein the two ends of each voltage transformer are electrically connected with the multifunctional variable ratio electric bridge and the multi-channel A/D converter respectively; the multi-channel A/D converter is connected with the CPU chip through a data line; the multifunctional variable ratio electric bridge is provided with a panel; a plurality of lead sockets, a power socket, a high-voltage plug and a grounding plug of the voltage transformers and a liquid crystal touch display screen are arranged on the panel; the lead sockets are in point connection with the voltage transformers respectively; and the liquid display touch display screen is connected with the CPU chip. According to the variable ratio electric bridge testing method, time can be saved by two thirds, the operation time and the operation difficulty are reduced, and the working efficiency is greatly improved.
Description
Technical field
The present invention relates to time variant voltage high pressure checkout equipment technical field, relate in particular to a kind of multi-functional no-load voltage ratio bridge test instrument and method of testing.
Background technology
In the semi-manufacture of power transformer, finished product production run, before the new transformer of installing puts into operation, preventive trial rules according to portion of State Grid, requirement is carried out the test of turn ratio or voltage ratio to the transformer of operation, with the whether turn-to-turn short circuit of the situation of the correctness that checks transformer turn ratio, shunting switch, transformer, whether transformer can paired running.The method to transformer and mutual inductor measuring quantitative change pressure ratio has two kinds in the prior art at present: the one, and bridge method, the one, the transformer relative method. the former adopts bridge balance, as QJ35 type transformer-ratio bridge, measurement range is 1 .02～111.12,0～2 grade of precision, this transformation ratio electricity emigrant can not measure big transformation ratio. and the latter needs a high-precision heavy transformer, and tap is a lot, and measurement range is more big more heavy, carries extremely inconvenient, and reading is not directly perceived, the numerical value of reading also needs to convert according to the wiring group of transformer, just can draw satisfactory transformation ratio, can only be by measuring mutually, working strength is big, inefficiency.
Along with constant development of economy, power supply reliability requires also more and more higher.Also shorter and shorter to the have a power failure time requirement of test of equipment, the transformer voltage ratio pilot project: need to measure high pressure to low pressure and high pressure centering is pressed and middle pressure to low pressure.Need the time longer, if once high, medium and low voltage winding primary connection is finished, measure simultaneously high pressure to medium and high pressure to low pressure measurement, can save for 2/3rds time, increase work efficiency greatly.The voltage ratio of capacitance type potential transformer is measured needs winding of measurement to the voltage ratio of Secondary Winding, can only measure one group now and change another group again, and the time is longer, if primary connection is finished, can finish by one-shot measurement, can save for 2/3rds time.
Summary of the invention
The invention provides a kind of easy to carry, measuring accuracy is high, reading multi-functional no-load voltage ratio bridge test instrument and method of testing intuitively.
The objective of the invention is to be achieved by following technical proposals: a kind of multi-functional no-load voltage ratio bridge test instrument, comprise the no-load voltage ratio electric bridge, several capacitance type potential transformers, multi-channel a/d converter and cpu chip, described voltage transformer (VT) two ends are electrically connected with multi-functional no-load voltage ratio electric bridge and multi-channel a/d converter respectively, described multi-channel a/d converter is connected with described cpu chip by data line, described multi-functional no-load voltage ratio electric bridge has a panel, a plurality of lead socket are set on this panel, supply socket, with the voltage transformer (VT) high-voltage plug, ground pin and touch LCD display screen, described lead socket is connected with described voltage transformer (VT) point respectively, and described touch LCD display screen is connected with described cpu chip.
A kind of no-load voltage ratio method of testing is to carry out according to the following steps:
1) the high, medium and low voltage winding of converting equipment to be measured or each of device high and low pressure winding are distinguished corresponding connection with test lead with the lead socket of multi-functional no-load voltage ratio electric bridge mutually, connect the test that power supply is respectively organized each phase voltage;
2) with computation model---the E=(Kn-k survey)/Kn*100%---embed the software for calculation of described GPU chip, utilize a winding additional examination electrical verification to press 10KV, all Secondary Winding measuring voltages, calculate actual measurement no-load voltage ratio value and ratio error value, k represents the no-load voltage ratio measured value in the described computation model, Kn represents nominal transformation ratio, and E represents the ratio error value, then shows by the touch LCD display screen.
Multi-functional no-load voltage ratio bridge test instrument of the present invention adopts advanced multi-channel a/d converter, and range ability is wide; Cpu chip is core processor, and starting up speed is fast, and test is fast; The touch LCD display screen can be user-friendly, improves hommization and intellectuality comprehensively, and is easy and simple to handle directly perceived, once finishes the test of three-phase no-load voltage ratio or the turn ratio, and test is fast, the accuracy height; By no-load voltage ratio method of testing of the present invention, once high, medium and low voltage winding primary connection is finished, measure simultaneously high pressure to medium and high pressure to low pressure measurement, can save for 2/3rds time.Increase work efficiency greatly.The voltage ratio of capacitance type potential transformer is measured needs winding of measurement to the voltage ratio of Secondary Winding, can only measure one group now and change another group again, time is longer, if primary connection is finished, can finish by one-shot measurement, the time of saving 2/3rds has reduced activity duration and difficulty, has improved work efficiency widely.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is the structural representation of panel of the present invention;
Fig. 2 is electrical block diagram of the present invention.
Embodiment
As Fig. 1, shown in 2, a kind of multi-functional no-load voltage ratio bridge test instrument, comprise the no-load voltage ratio electric bridge, several capacitance type potential transformers, multi-channel a/d converter and cpu chip, described voltage transformer (VT) two ends are electrically connected with multi-functional no-load voltage ratio electric bridge and multi-channel a/d converter respectively, described multi-channel a/d converter is connected with described cpu chip by data line, described multi-functional no-load voltage ratio electric bridge has a panel, a plurality of lead socket 1 are set on this panel, supply socket 2, with voltage transformer (VT) high-voltage plug 5, ground pin 4 and touch LCD display screen 3, described lead socket 1 is connected with described voltage transformer (VT) point respectively, and described touch LCD display screen 3 is connected with described cpu chip.
A kind of no-load voltage ratio method of testing is to carry out according to the following steps:
1) the high, medium and low voltage winding of converting equipment to be measured or each of device high and low pressure winding are distinguished corresponding connection with test lead with the lead socket of multi-functional no-load voltage ratio electric bridge mutually, connect the test that power supply is respectively organized each phase voltage;
2) with computation model---the E=(Kn-k survey)/Kn*100%---embed the software for calculation of described GPU chip, utilize a winding additional examination electrical verification to press 10KV, all Secondary Winding measuring voltages, calculate actual measurement no-load voltage ratio value and ratio error value, k represents the no-load voltage ratio measured value in the described computation model, Kn represents nominal transformation ratio, and E represents the ratio error value, then shows by the touch LCD display screen.
Multi-functional no-load voltage ratio bridge test instrument of the present invention adopts advanced multi-channel a/d converter, and range ability is wide; Cpu chip is core processor, and starting up speed is fast, and test is fast; The touch LCD display screen can be user-friendly, improves hommization and intellectuality comprehensively, and is easy and simple to handle directly perceived, once finishes the test of three-phase no-load voltage ratio or the turn ratio, and test is fast, the accuracy height; By no-load voltage ratio method of testing of the present invention, once high, medium and low voltage winding primary connection is finished, measure simultaneously high pressure to medium and high pressure to low pressure measurement, can save for 2/3rds time.Increase work efficiency greatly.The voltage ratio of capacitance type potential transformer is measured needs winding of measurement to the voltage ratio of Secondary Winding, can only measure one group now and change another group again, time is longer, if primary connection is finished, can finish by one-shot measurement, the time of saving 2/3rds has reduced activity duration and difficulty, has improved work efficiency widely.
Claims (2)
1. multi-functional no-load voltage ratio bridge test instrument, it is characterized in that: comprise the no-load voltage ratio electric bridge, several capacitance type potential transformers, multi-channel a/d converter and cpu chip, described voltage transformer (VT) two ends are electrically connected with multi-functional no-load voltage ratio electric bridge and multi-channel a/d converter respectively, described multi-channel a/d converter is connected with described cpu chip by data line, described multi-functional no-load voltage ratio electric bridge has a panel, a plurality of lead socket are set on this panel, supply socket, with the voltage transformer (VT) high-voltage plug, ground pin and touch LCD display screen, described lead socket is connected with described voltage transformer (VT) point respectively, and described touch LCD display screen is connected with described cpu chip.
2. no-load voltage ratio method of testing is characterized in that: be to carry out according to the following steps:
1) the high, medium and low voltage winding of converting equipment to be measured or each of device high and low pressure winding are distinguished corresponding connection with test lead with the lead socket of multi-functional no-load voltage ratio electric bridge mutually, connect the test that power supply is respectively organized each phase voltage;
2) with computation model---the E=(Kn-k survey)/Kn*100%---embed the software for calculation of described GPU chip, utilize a winding additional examination electrical verification to press 10KV, all Secondary Winding measuring voltages, calculate actual measurement no-load voltage ratio value and ratio error value, k represents the no-load voltage ratio measured value in the described computation model, Kn represents nominal transformation ratio, and E represents the ratio error value, then shows by the touch LCD display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101812971A CN103278705A (en) | 2013-05-15 | 2013-05-15 | Multifunctional variable ratio electric bridge tester and testing method |
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| CN2013101812971A CN103278705A (en) | 2013-05-15 | 2013-05-15 | Multifunctional variable ratio electric bridge tester and testing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809144A (en) * | 2014-02-27 | 2014-05-21 | 国家电网公司 | Transformation ratio tester verification system and detecting method thereof |
| CN112433105A (en) * | 2020-10-27 | 2021-03-02 | 吴江变压器有限公司 | Transformer semi-finished product transformation ratio measuring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS57171272A (en) * | 1981-04-14 | 1982-10-21 | Toshiba Corp | Transformation ratio detecting and testing device for operating transformer |
| CN201819920U (en) * | 2010-10-22 | 2011-05-04 | 河南省电力公司平顶山供电公司 | Complex patchboard of full-automatic transformer-ratio bridge |
| CN201886089U (en) * | 2010-11-22 | 2011-06-29 | 河南省电力公司平顶山供电公司 | Fully automatic tester for variable ratio bridges |
| CN102128957A (en) * | 2010-11-26 | 2011-07-20 | 河南省电力公司平顶山供电公司 | Mechanical type full-automatic transformation ratio electrical bridge |
| 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 |
| CN203069682U (en) * | 2012-12-09 | 2013-07-17 | 国家电网公司 | Multifunctional transformer ratio bridge tester |
-
2013
- 2013-05-15 CN CN2013101812971A patent/CN103278705A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57171272A (en) * | 1981-04-14 | 1982-10-21 | Toshiba Corp | Transformation ratio detecting and testing device for operating transformer |
| CN201819920U (en) * | 2010-10-22 | 2011-05-04 | 河南省电力公司平顶山供电公司 | Complex patchboard of full-automatic transformer-ratio bridge |
| CN201886089U (en) * | 2010-11-22 | 2011-06-29 | 河南省电力公司平顶山供电公司 | Fully automatic tester for variable ratio bridges |
| CN102128957A (en) * | 2010-11-26 | 2011-07-20 | 河南省电力公司平顶山供电公司 | Mechanical type full-automatic transformation ratio electrical bridge |
| 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 |
| CN203069682U (en) * | 2012-12-09 | 2013-07-17 | 国家电网公司 | Multifunctional transformer ratio bridge tester |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809144A (en) * | 2014-02-27 | 2014-05-21 | 国家电网公司 | Transformation ratio tester verification system and detecting method thereof |
| CN112433105A (en) * | 2020-10-27 | 2021-03-02 | 吴江变压器有限公司 | Transformer semi-finished product transformation ratio measuring method |
| CN112433105B (en) * | 2020-10-27 | 2024-02-09 | 吴江变压器有限公司 | Transformer semi-finished product transformation ratio measuring method |
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Application publication date: 20130904 |