CN107064851A - A kind of electronic mutual inductor error testing device - Google Patents
A kind of electronic mutual inductor error testing device Download PDFInfo
- Publication number
- CN107064851A CN107064851A CN201710297709.6A CN201710297709A CN107064851A CN 107064851 A CN107064851 A CN 107064851A CN 201710297709 A CN201710297709 A CN 201710297709A CN 107064851 A CN107064851 A CN 107064851A
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- mutual inductor
- electronic mutual
- testing device
- arithmetic element
- error testing
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000003993 interaction Effects 0.000 claims abstract description 3
- 230000004907 flux Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 230000015654 memory Effects 0.000 claims description 2
- 238000007405 data analysis Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention relates to a kind of electronic mutual inductor error testing device, including collecting unit, synchronization unit, arithmetic element, transmission unit and server.Collecting unit is including electronic mutual inductor etc.；Synchronization unit exports synchronizing signal to a signal of electronic mutual inductor, in the electromagnetic transformer secondary singal and arithmetic element of operation；Arithmetic element is used to calculate a signal of electronic mutual inductor and secondary singal virtual value, phase and the frequency of electromagnetic transformer, and carries out real-time angular difference and than difference calculating, obtain comparing error information in real time；The Real-time Error data that transmission unit is used to obtain carry out data interaction with background server, and server is used to show compares error information in real time.The present apparatus can carry out real time data inspecting, the inquiry of historical data and data analysis to the error of electronic mutual inductor, the problem of can be for solving electronic mutual inductor online error measure.
Description
Technical field
The present invention relates to a kind of error testing device of transformer, belong to transformer test technical field.
Background technology
At present, traditional electromagnetic transformer can not meet electric power digital, the demand of automation, take and generation
Be that insulation system is simple, no magnetic saturation, the electronic mutual inductor that measurement accuracy is high, dynamic range is big.Become as digitlization
The front end of power station metering system, the measurement accuracy electric energy metrical of electronic mutual inductor and analysis etc. are particularly significant.Electronic type mutual inductance
The electric energy for directly affecting digital transformer substation is settled accounts in the degree of accuracy of the device to voltage and current measurement and power system is to Current Voltage
Monitoring.In order to obtain error during electronic mutual inductor on-line operation, it is necessary to which a kind of error measuring means exists to transformer
Line error is tested, and the analysis recorded in real time.
The content of the invention
The invention provides a kind of electronic mutual inductor error testing device, for solving electronic mutual inductor error measure
The problem of.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of electronic mutual inductor error testing device, it is characterised in that：Including what is be sequentially connected
Collecting unit：For gathering signal of electronic mutual inductor and electromagnetic transformer secondary singal；Including being sequentially connected
Include electronic mutual inductor, combiner, network interface card；The electromagnetic current transducer being sequentially connected, accurate Zero flux transformer, electricity
Current-to-voltage converter and A/D converter；The network interface card is connected with synchronization unit；A/D converter simultaneously with synchronization unit and fortune
Calculate unit connection；
Synchronization unit：Synchronizing signal is exported to a signal of electronic mutual inductor, it is secondary in the electromagnetic transformer of operation
Signal and arithmetic element；
Arithmetic element：Calculate the signal and the secondary singal virtual value of electromagnetic transformer of electronic mutual inductor, phase and
Frequency, and carry out real-time angular difference and calculated than difference；
Transmission unit：For the Real-time Error data that will be obtained and background server progress data interaction；
Server：Error information is compared in real time for showing.
In above-mentioned electronic mutual inductor error testing device, collecting unit is powered using single insulating power supply, computing
The power supply connection impulse train suppressor and power-supply filter of unit；Electromagnetic transformer in collecting unit in operation is worn with precision
Heart Zero flux transformer is connected, and its secondary singal is delivered to arithmetic element by current-voltage conversion and A/D conversions.
Load resistance inside above-mentioned electronic mutual inductor error testing device, current-to-voltage converter should be realized pair
The matching of accurate punching Zero flux transformer, feedback resistance is used for the multiplication factor for adjusting current-to-voltage converting circuit, and its is defeated
The current terminal for entering side answers Opposite direction connection.
In above-mentioned electronic mutual inductor error testing device, the synchronization unit is included based on the single of the soft cores of Nios
FPGA system.
In above-mentioned electronic mutual inductor error testing device, the arithmetic element core is Analog Device companies
BF533 DSP CPU.
In above-mentioned electronic mutual inductor error testing device, the data that the transmission unit includes model SDG400 are passed
Defeated unit.
In above-mentioned electronic mutual inductor error testing device, the server for be connected to 256MB NAND FLASH and
The ARM CPU of 256MB internal memories.
The beneficial effects of the invention are as follows：This experimental provision can realize electronic mutual inductor be incorporated into the power networks for a long time in error
Test, and can analysis measurement data in real time, carry out than difference and angular difference computing；It is connected on the impulse train suppressor and electricity of ac input end
Source filter can effectively ensure the reliable and stable of core power supply, and reduce the content of noise.To signal condition part
The insulating power supply powered with A/D converter can improve the precision and signal to noise ratio of transformer secondary singal.
Brief description of the drawings
Fig. 1 is electronic mutual inductor error testing connection figure.
Embodiment
Illustrate error testing device of transformer with reference to Fig. 1, the device is by collecting unit, synchronization unit, arithmetic element and
Server group into.Described collecting unit is included in the electromagnetic transformer of operation, electronic mutual inductor, accurate Zero flux mutual inductance
Device, current-to-voltage converter, A/D converter ADS1278, OPA1632 differential amplification chip, AX88796 network card chips and conjunction
And device.AC signal is changed into low current signal by electromagnetic transformer and accurate Zero flux transformer, then by Current Voltage
Converter is changed into single-ended voltage signal, and ADS178 24BitAD samplings are sent into after OPA1632 differential amplifications；Combiner is by electricity
After the IEC61850-9-1/2 data messages of minor transformer output are received by RTL8201BL network interface cards PHY, send to
AX88796 network card chips.Described arithmetic element is powered by the power supply of connection impulse train suppressor and power-supply filter, its main body
For BF533CPU chips, on the one hand BF533CPU obtains the sampled data of electromagnetic transformer by accessing A/D samplers, another
Aspect accesses network interface card by versabus and obtains digital quantity, and the two result is analyzed, electronic mutual inductor is drawn
Than difference and angular difference.Described synchronization unit uses the single FPGA system based on the soft cores of Nios, and is equipped with appropriate peripheral circuit,
It exports synchronizing signal to a signal of electronic mutual inductor, in the electromagnetic transformer secondary singal and computing list of operation
Member.Described server is connected by data link with arithmetic element, error information is compared in real time to show, using 1U frames
Formula server, is mounted in same screen cabinet in company with display, keyboard, mouse and monitoring device.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (7)
1. a kind of electronic mutual inductor error testing device, it is characterised in that：Including what is be sequentially connected
Collecting unit (1)：For gathering signal of electronic mutual inductor and electromagnetic transformer secondary singal；Including connecting successively
What is connect includes electronic mutual inductor (6), combiner (8), network interface card (9)；The electromagnetic current transducer (7) being sequentially connected is accurate
Zero flux transformer (10), current-to-voltage converter (11) and A/D converter (12)；The network interface card (9) and synchronization unit (2)
Connection；A/D converter (12) with synchronization unit (2) and arithmetic element (3) while be connected；
Synchronization unit (2)：Synchronizing signal is exported to a signal of electronic mutual inductor, in the electromagnetic transformer two of operation
Secondary signal and arithmetic element (3)
Arithmetic element (3)：Calculate a signal of electronic mutual inductor and secondary singal virtual value, the phase of electromagnetic transformer
And frequency, and carry out real-time angular difference and calculated than difference；
Transmission unit (4)：For the Real-time Error data that will be obtained and background server (5) progress data interaction；
Server (5)：Error information is compared in real time for showing.
2. electronic mutual inductor error testing device according to claim 1, it is characterised in that：Collecting unit (1) is used
Single insulating power supply (13) power supply, power supply (14) the connection impulse train suppressor and power-supply filter of arithmetic element (3)；Collection
Electromagnetic transformer (7) in unit (1) in operation is connected with accurate punching Zero flux transformer (10), and its secondary singal passes through
Current-voltage conversion and A/D conversions are delivered to arithmetic element (3).
3. electronic mutual inductor error testing device according to claim 1 or 2, it is characterised in that：Current-voltage conversion
The internal load resistance of device (11) should realize the matching to accurate punching Zero flux transformer (10), and feedback resistance is used to adjust electricity
The multiplication factor of voltage conversion circuit is flowed, and the current terminal of its input side answers Opposite direction connection.
4. electronic mutual inductor error testing device according to claim 1, it is characterised in that：The synchronization unit (2)
Including the single FPGA system based on the soft cores of Nios.
5. electronic mutual inductor error testing device according to claim 1, it is characterised in that：The arithmetic element (3)
Core is the BF533 DSP CPU of Analog Device companies.
6. electronic mutual inductor error testing device according to claim 1, it is characterised in that：The transmission unit (4)
Include model SDG400 data transmission unit.
7. electronic mutual inductor error testing device according to claim 1, it is characterised in that：The server (5) is
It is connected to the ARM CPU of 256MB NAND FLASH and 256MB internal memories.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710297709.6A CN107064851A (en) | 2017-04-28 | 2017-04-28 | A kind of electronic mutual inductor error testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710297709.6A CN107064851A (en) | 2017-04-28 | 2017-04-28 | A kind of electronic mutual inductor error testing device |
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| CN107064851A true CN107064851A (en) | 2017-08-18 |
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| CN201710297709.6A Pending CN107064851A (en) | 2017-04-28 | 2017-04-28 | A kind of electronic mutual inductor error testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044966A (en) * | 2019-12-23 | 2020-04-21 | 中国电力科学研究院有限公司 | Electronic current transformer live detection system and method |
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| CN101285857A (en) * | 2008-05-26 | 2008-10-15 | 中国航天科技集团公司第五研究院第五一四研究所 | Alternating current voltage electric current converter and device and method for measuring alternating-current small current |
| CN101806876A (en) * | 2010-05-10 | 2010-08-18 | 华中科技大学 | Electronic type transformer checking system |
| CN102928803A (en) * | 2012-10-18 | 2013-02-13 | 中国电力科学研究院 | Electronic transformer checking device based on synchronization pulse output power supply |
| JP2013053855A (en) * | 2011-08-31 | 2013-03-21 | National Institute Of Advanced Industrial & Technology | Error estimation device for electronic current transformer |
| CN202948124U (en) * | 2012-10-31 | 2013-05-22 | 江苏省电力公司电力科学研究院 | Running error real-time comparison device for optical and electromagnetic current transformers |
| CN106324546A (en) * | 2016-10-27 | 2017-01-11 | 中国南方电网有限责任公司电网技术研究中心 | Electronic transformer state acquisition device |
| CN206041169U (en) * | 2016-08-31 | 2017-03-22 | 苏州工业园区新明亚电子科技有限公司 | Electric power device |
| CN206740951U (en) * | 2017-04-28 | 2017-12-12 | 贵州电网有限责任公司电力科学研究院 | A kind of electronic mutual inductor error testing device |
-
2017
- 2017-04-28 CN CN201710297709.6A patent/CN107064851A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285857A (en) * | 2008-05-26 | 2008-10-15 | 中国航天科技集团公司第五研究院第五一四研究所 | Alternating current voltage electric current converter and device and method for measuring alternating-current small current |
| CN101806876A (en) * | 2010-05-10 | 2010-08-18 | 华中科技大学 | Electronic type transformer checking system |
| JP2013053855A (en) * | 2011-08-31 | 2013-03-21 | National Institute Of Advanced Industrial & Technology | Error estimation device for electronic current transformer |
| CN102928803A (en) * | 2012-10-18 | 2013-02-13 | 中国电力科学研究院 | Electronic transformer checking device based on synchronization pulse output power supply |
| CN202948124U (en) * | 2012-10-31 | 2013-05-22 | 江苏省电力公司电力科学研究院 | Running error real-time comparison device for optical and electromagnetic current transformers |
| CN206041169U (en) * | 2016-08-31 | 2017-03-22 | 苏州工业园区新明亚电子科技有限公司 | Electric power device |
| CN106324546A (en) * | 2016-10-27 | 2017-01-11 | 中国南方电网有限责任公司电网技术研究中心 | Electronic transformer state acquisition device |
| CN206740951U (en) * | 2017-04-28 | 2017-12-12 | 贵州电网有限责任公司电力科学研究院 | A kind of electronic mutual inductor error testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111044966A (en) * | 2019-12-23 | 2020-04-21 | 中国电力科学研究院有限公司 | Electronic current transformer live detection system and method |
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Application publication date: 20170818 |
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