CN205507033U - Transformer on -load tap -changer alternating current -direct current parameter testing appearance - Google Patents
Transformer on -load tap -changer alternating current -direct current parameter testing appearance Download PDFInfo
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- CN205507033U CN205507033U CN201620104145.0U CN201620104145U CN205507033U CN 205507033 U CN205507033 U CN 205507033U CN 201620104145 U CN201620104145 U CN 201620104145U CN 205507033 U CN205507033 U CN 205507033U
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Abstract
The utility model relates to a transformer on -load tap -changer alternating current -direct current parameter testing appearance. Its purpose is in order to provide a simple structure, transformer on -load tap -changer testing arrangement that detection accuracy is high. The utility model discloses a power switching circuit, direct current detection circuitry, voltage acquisition circuit, electric current acquisition circuit and central processing unit. Power switching circuit and direct current detection circuitry's input inserts the power respectively, and direct current detection circuitry's signal output part is connected with central processing unit's signal reception end, and power switching circuit's output is connected with voltage acquisition circuit and electric current acquisition circuit's signal acquisition end respectively, and the signal reception that voltage acquisition circuit and electric current acquisition circuit's signal output part passes through AD detection circuitry 3 and central processing unit holds and is connected. Central processing unit's data output end is connected with the data input of touch -control display screen end, and central processing unit's control end is connected with the control signal output of touch -control display screen.
Description
Technical field
This utility model relates to electric power monitoring field, particularly relates to a kind of on-load tap changers of transformers AC-DC parameter tester.
Background technology
For a long time, power industry scene carries out on-load tap changers of transformers test and has been used up direct methods test, then the waveform of acquisition and shunting switch manufacturer routine test waveform is compared, and shunting switch scene is tested serving certain effect.Owing to shunting switch manufacturer routine test is to test naked switch, scene is the test that transformer belt winding is carried out, both are widely different, direct methods test tested person technical method and technical capability limit, on-the-spot shunting switch test is it sometimes appear that waveform cannot the problem such as interpretation, each side engineers and technicians dispute is very big, and its subject matter shows the following aspects:
A) the load ratio bridging switch test that DC experiment method is only applicable at winding neutral point and has neutral point to extract out, load ratio bridging switch and single-phase transformer load ratio bridging switch to other position (line end, the middle part etc.) place beyond winding neutral point can not be tested；
B) DC test is due to its reason such as test philosophy, technical capability, and the waveform sometimes testing acquisition is bigger with the different wave shape that manufacturer is given, it is impossible to is given and accurately analyzes conclusion；
C) Partial DC test waveform cannot judge that shunting switch acting characteristic is normal extremely, puts into operation with manufacturer's commitment to quality, it is impossible to ensures the safe operation of shunting switch；
D) in design of transformer, employing and reactance shunting switch, the vacuum circuit breaker type shunting switch etc. of new technique use, and make DC test method can not meet on-the-spot test needs.
" on-load tap changer tester " used at the scene at present, it is to use once-through principle design, transformer on-load tap changer tester as disclosed in CN102129032A, in order to be able to reach to test out waveform under band winding state, it is filtered the waveform tested out processing, waveform after treatment is observed close to ideal test waveform from surface, the most this waveform after tester inter-process is to there is certain empty wave component, it is impossible to react waveform really.
Utility model content
The technical problems to be solved in the utility model be to provide a kind of simple in construction, easy and simple to handle, test accurate on-load tap changers of transformers AC-DC parameter tester.
nullThis utility model on-load tap changers of transformers AC-DC parameter tester，Wherein，Including power-switching circuit、DC detection circuit、Voltage collection circuit、Current collection circuit、A/D change-over circuit and central processing unit，The input of power-switching circuit and DC detection circuit is respectively connected to power supply，The signal output part of DC detection circuit is connected with the signal receiving end of central processing unit，The outfan of power-switching circuit is connected with the signals collecting end of voltage collection circuit and current collection circuit respectively，The signal output part of voltage collection circuit and current collection circuit is connected with the input of A/D change-over circuit，The outfan of A/D change-over circuit is connected with the signal receiving end of central processing unit，The data output end of central processing unit is connected with the data input pin of touching display screen，The end that controls of central processing unit is connected with the control signal outfan of touching display screen.
This utility model on-load tap changers of transformers AC-DC parameter tester, is additionally provided with filter circuit between wherein said power-switching circuit and DC detection circuit and power supply.
This utility model on-load tap changers of transformers AC-DC parameter tester, the power end of wherein said DC detection circuit is connected with constant-current source circuit.
This utility model on-load tap changers of transformers AC-DC parameter tester, it is provided with operational amplifier between wherein said voltage collection circuit and current collection circuit and A/D change-over circuit, the input of operational amplifier signal output part with voltage collection circuit and current collection circuit respectively is connected, and the outfan of operational amplifier is connected with the input of A/D change-over circuit.
This utility model on-load tap changers of transformers AC-DC parameter tester, the data output end of wherein said central processing unit is connected with SD card.
This utility model on-load tap changers of transformers AC-DC parameter tester difference from prior art is: this utility model uses the mode of alternating-current measurement to test on-load tap changers of transformers, there is not empty wave component in the waveform obtained after test, waveform is true and reliable, it is additionally provided with DC detection circuit simultaneously, the parameter of load ratio bridging switch is acquired by the mode that can use traditional DC test, and by the data collected and waveform transfer to central processing unit, two kinds of test modes integrate, and test data are more accurate.Using touching display screen externally show test data and complete the control to central processing unit, man-machine interaction is more convenient, and manipulation is simple.
Below in conjunction with the accompanying drawings this utility model on-load tap changers of transformers AC-DC parameter tester is described further.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of this utility model on-load tap changers of transformers AC-DC parameter tester.
Detailed description of the invention
As it is shown in figure 1, be the structured flowchart of this utility model on-load tap changers of transformers AC-DC parameter tester, including power-switching circuit 2, DC detection circuit 7, voltage collection circuit 3, current collection circuit 4, A/D change-over circuit 6 and central processing unit 1.The input of power-switching circuit 2 accesses power supply 12, filter circuit 11 it is provided with between power supply 12 and power-switching circuit 2, the outfan of power-switching circuit 2 is connected with the signals collecting end of voltage collection circuit 3 and current collection circuit 4 respectively, the signal output part of voltage collection circuit 3 and current collection circuit 4 is connected with the input of operational amplifier 5, the outfan of operational amplifier 5 is connected with the input of A/D change-over circuit 6, and the outfan of A/D change-over circuit 6 is connected with the signal receiving end of central processing unit 1.The signal input part of DC detection circuit 7 accesses power supply 12, filter circuit 11 it is provided with between power supply 12 and DC detection circuit 7, the power end of DC detection circuit 7 is connected with constant-current source circuit 8, and the voltage of constant-current source circuit 8 is 24V, and selectable electric current is 0.5V and 1V.The signal output part of DC detection circuit 7 is connected with the signal receiving end of central processing unit 1.The data output end of central processing unit 1 is connected with data input pin and the SD card 10 of touching display screen 9 respectively, the end that controls of central processing unit 1 is connected with the control signal outfan of touching display screen 9, being controlled the duty of central processing unit 1 by carrying out operating on touching display screen 9, touching display screen 9 uses the liquid crystal display screen that model is AT070TN94 that CMO company produces.
Power supply 12 employed in an embodiment of the present utility model is 220V civil power.
A/D change-over circuit 6 employed in an embodiment of the present utility model is the A/D change-over circuit that model is AD7606 that AD company of the U.S. produces, and has 16,8 tunnel precision and the switching rate of 200kps；Central processing unit 1 uses 210 flush bonding modules with wince6.0 system that Fei Ling embedded technology company limited produces, and has 16 parallel-by-bit interfaces, can directly collect the conversion data of A/D change-over circuit 6.
Operation principle of the present utility model is: power-switching circuit 2 is by reference power supply that input single-phase 220V Power convert is three-phase 800V, three-phase voltage signal and current signal are acquired by voltage collection circuit 3 and current collection circuit 4 respectively, and it being transferred to A/D change-over circuit 6 after the voltage signal collected and current signal being amplified by operational amplifier 5, the analogue signal that A/D change-over circuit 6 receives is converted to digital signal and is transferred to central processing unit 1 and is analyzed record.The data such as transition waveform, transit time and each moment transition resistance value of load ratio bridging switch are measured by DC detection circuit 7, and data transfer is analyzed record to central processing unit 1, the all data collected can be stored in SD card 10 by central processing unit 1, it is possible to is externally shown by waveform when data and shunting switch action by touching display screen 9.
This utility model on-load tap changers of transformers AC-DC parameter tester, on-load tap changers of transformers is tested by the mode using alternating-current measurement, there is not empty wave component in the waveform obtained after test, waveform is true and reliable, it is additionally provided with DC detection circuit 7, it is possible to use the mode of traditional DC test that the parameter of load ratio bridging switch is acquired simultaneously, and by the data collected and waveform transfer to central processing unit 1, two kinds of test modes integrate, and test data are more accurate.Using touching display screen 9 externally show test data and complete the control to central processing unit 1, man-machine interaction is more convenient, and manipulation is simple.This utility model simple in construction, easy and simple to handle, test accurately, compared with prior art have clear advantage.
Embodiment described above is only to be described preferred implementation of the present utility model; not scope of the present utility model is defined; on the premise of without departing from this utility model design spirit; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims determine.
Claims (5)
- null1. an on-load tap changers of transformers AC-DC parameter tester，It is characterized in that: include power-switching circuit (2)、DC detection circuit (7)、Voltage collection circuit (3)、Current collection circuit (4)、A/D change-over circuit (6) and central processing unit (1)，The input of power-switching circuit (2) and DC detection circuit (7) is respectively connected to power supply (12)，The signal output part of DC detection circuit (7) is connected with the signal receiving end of central processing unit (1)，The outfan of power-switching circuit (2) signals collecting end with voltage collection circuit (3) and current collection circuit (4) respectively is connected，The signal output part of voltage collection circuit (3) and current collection circuit (4) is connected with the input of A/D change-over circuit (6)，The outfan of A/D change-over circuit (6) is connected with the signal receiving end of central processing unit (1)，The data output end of central processing unit (1) is connected with the data input pin of touching display screen (9)，The control end of central processing unit (1) is connected with the control signal outfan of touching display screen (9).
- On-load tap changers of transformers AC-DC parameter tester the most according to claim 1, it is characterised in that: it is additionally provided with filter circuit (11) between described power-switching circuit (2) and DC detection circuit (7) and power supply (12).
- On-load tap changers of transformers AC-DC parameter tester the most according to claim 1, it is characterised in that: the power end of described DC detection circuit (7) is connected with constant-current source circuit (8).
- On-load tap changers of transformers AC-DC parameter tester the most according to claim 1, it is characterized in that: between described voltage collection circuit (3) and current collection circuit (4) and A/D change-over circuit (6), be provided with operational amplifier (5), the input of operational amplifier (5) signal output part with voltage collection circuit (3) and current collection circuit (4) respectively is connected, and the outfan of operational amplifier (5) is connected with the input of A/D change-over circuit (6).
- On-load tap changers of transformers AC-DC parameter tester the most according to claim 1, it is characterised in that: the data output end of described central processing unit (1) is connected with SD card (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620104145.0U CN205507033U (en) | 2016-02-02 | 2016-02-02 | Transformer on -load tap -changer alternating current -direct current parameter testing appearance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620104145.0U CN205507033U (en) | 2016-02-02 | 2016-02-02 | Transformer on -load tap -changer alternating current -direct current parameter testing appearance |
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| CN205507033U true CN205507033U (en) | 2016-08-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106843362A (en) * | 2017-01-19 | 2017-06-13 | 浙江工业大学 | Can high-speed switch constant-current source for cold atom interference-type gravimeter |
| CN107271727A (en) * | 2017-07-31 | 2017-10-20 | 国网上海市电力公司 | A kind of control recorder tested based on voltage ride-through |
| CN108957308A (en) * | 2018-08-01 | 2018-12-07 | 河北科技师范学院 | A kind of load ratio bridging switch ontology and handoff parameter off-line measurement method and measuring system |
| CN110763992A (en) * | 2019-11-28 | 2020-02-07 | 国网河北省电力有限公司电力科学研究院 | AC/DC comprehensive test method for on-load tap-changer of large transformer |
-
2016
- 2016-02-02 CN CN201620104145.0U patent/CN205507033U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106843362A (en) * | 2017-01-19 | 2017-06-13 | 浙江工业大学 | Can high-speed switch constant-current source for cold atom interference-type gravimeter |
| CN106843362B (en) * | 2017-01-19 | 2018-01-12 | 浙江工业大学 | Can high-speed switch constant-current source for cold atom interference-type gravimeter |
| CN107271727A (en) * | 2017-07-31 | 2017-10-20 | 国网上海市电力公司 | A kind of control recorder tested based on voltage ride-through |
| CN107271727B (en) * | 2017-07-31 | 2023-08-29 | 国网上海市电力公司 | Control recorder based on voltage ride through test |
| CN108957308A (en) * | 2018-08-01 | 2018-12-07 | 河北科技师范学院 | A kind of load ratio bridging switch ontology and handoff parameter off-line measurement method and measuring system |
| CN110763992A (en) * | 2019-11-28 | 2020-02-07 | 国网河北省电力有限公司电力科学研究院 | AC/DC comprehensive test method for on-load tap-changer of large transformer |
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