CN107390157A - A kind of apparatus and method for verifying direct current instrument transformer square-wave response - Google Patents
A kind of apparatus and method for verifying direct current instrument transformer square-wave response Download PDFInfo
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- CN107390157A CN107390157A CN201710470308.6A CN201710470308A CN107390157A CN 107390157 A CN107390157 A CN 107390157A CN 201710470308 A CN201710470308 A CN 201710470308A CN 107390157 A CN107390157 A CN 107390157A
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- Prior art keywords
- direct current
- instrument transformer
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- verified
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- 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
Abstract
The present invention provides a kind of apparatus and method for verifying direct current instrument transformer square-wave response, and described device includes：Square wave current source, it is used for the square wave current for providing verification direct current instrument transformer square-wave response；Standard direct current instrument transformer, it is used to provide calibration signal for direct current instrument transformer square-wave response verification；Conversion unit of protocol, it is used to parse the light data signal that direct current instrument transformer to be verified exports and is converted to electric data signal；Clock synchronization unit, it is used for the output signal of synchronous acquisition direct current instrument transformer to be measured and standard direct current instrument transformer；Verification unit, it is used to gather the output signal of standard direct current instrument transformer and direct current instrument transformer to be verified and calculated to obtain check results.
Description
Technical field
The present invention relates to instrument to verify field, and more particularly, to a kind of verification direct current instrument transformer square-wave response
Apparatus and method.
Background technology
At present in DC transmission system, DC voltage, the signal of current transformer measurement are mainly used for control protection.Phase
For AC transmission system, DC transmission system has faster sample rate, broader frequency bandwidth etc. to control protection signal
It is required that this point shows especially prominent in flexible direct current power transmission system.During flexible direct current power transmission system DC side failure
Impedance loop is very small, easily in the very big fault current of instantaneous generation, meanwhile, the ability of regulation and control of flexible direct current power transmission system
By force, so in order to improve the response speed of flexible direct current system, suppress fault current, improve the security and stability of power system,
Need to control protection signal sampling that there is faster sample rate and broader frequency bandwidth, while also transient characterisitics are proposed
Higher requirement, such as require that direct current instrument transformer signal transmission delay is less than 60 μ s, bandwidth in ± 500kV flexible DC power transmissions
Degree will reach 5kHz.
Related national standard proposes clear and definite test requirements document to the transient characterisitics of direct current instrument transformer, but the country does not have still at present
The mechanism of complete transient characterisitics experiment can be carried out according to Standard：Transient voltage experiment is not carried out, transient current experiment
By waiting ampere-turn to realize, and the most of DC current transformers used in current conversion station are shunting type DC current mutual inductance
Device, it the ampere-turn test method(s) such as can not use.Therefore existing test capability is unable to reach test requirements document specified in standard.With direct current
The rapid development of technology of transmission of electricity, the progressively expansion of AC-DC hybrid power grid scale, the safety and stability sex chromosome mosaicism of DC transmission system
It is more prominent, and carry out the transient characterisitics experiment of direct current instrument transformer, the discrimination capabilities to direct current instrument transformer performance can be effectively improved,
Ensure the safe and stable operation of DC transmission system.Therefore, Xian High voltage Apparatus Research Institute, Chinese quantitative study institute, south electricity
Correlation test research institution of net etc., all actively developing the related scientific research of direct current instrument transformer and test capability construction work
Make.
A kind of Current Mutual Inductance of patent of invention of Electric Power Research Institute, Yunnan Power Test ＆ Research Institute's application
The device transient characterisitics tester (patent No.：201420149007.5), the application of Electric Power Research Institute of State Grid Henan Power Supply Company
Patent of invention electronic current mutual inductor transient state progress of disease delay time measurement device and the measuring method (patent No.：
201410227561.5), the patent of invention electronic current of Electric Power Research Institute of Yunnan Power System Co., Ltd application is mutual
Sensor transient characterisitics analysis system and the method (patent No.：201610030521.0).The hair of China Electric Power Research Institute's application
A kind of high current transient characterisitics detection means (patent No. of bright electronic current mutual inductor of patent：ZL201410406242.0),
The patent for the transformer transient verification that the country has applied at present is essentially all for D.C mutual-inductor, direct current instrument transformer transient state
Patent in terms of checked for characteristics is less, and not yet finds the transient state verification in terms of square-wave response.
The content of the invention
In order to which the technology for the method and apparatus deficiency for solving to verify direct current instrument transformer square-wave response existing for background technology is asked
Topic, the present invention provide a kind of device for verifying direct current instrument transformer square-wave response, and described device includes：
Square wave current source, it is used for the square wave current for providing verification direct current instrument transformer square-wave response；
Standard direct current instrument transformer, it is used to provide calibration signal for direct current instrument transformer square-wave response verification；
Conversion unit of protocol, the light data signal that direct current instrument transformer to be verified exports is parsed and is converted to electric numeral letter
Number；
Clock synchronization unit, it is used for the output signal of synchronous acquisition direct current instrument transformer to be measured and standard direct current instrument transformer；
Verification unit, it is based on gathering the output signal of standard direct current instrument transformer and direct current instrument transformer to be verified and carrying out
Calculate to obtain check results.
Preferably, the square wave current source includes signal generator and power amplifier, wherein, signal generator conduct side
Ripple signal source, the signal level input of Parameter adjustable, the power amplifier with signals generator output are provided for described device
The power stage amplification of signal.
Preferably, frequency, pulse width and the rising of the signal generator adjustable parameter including square-wave signal/under
Drop along the time.
Preferably, the conversion unit of protocol includes photoelectric conversion module and flush bonding module, when direct current mutual inductance to be verified
During device output light data signal, electric data signal is converted to by photoelectric conversion module, and by flush bonding module to electric numeral
Signal is acquired, is sent to the correction verification module of verification unit after protocol analysis and data packing.
Preferably, the verification unit includes A/D acquisition modules and correction verification module, and there is the input of dual-channel analog signal to connect
Mouth and digital signal input interface, wherein A/D acquisition modules are used to gather standard direct current instrument transformer and direct current instrument transformer to be verified
The analog signal of output, correction verification module are used to be believed according to the output of the standard direct current instrument transformer and direct current instrument transformer to be verified of reception
Number calculate the elementary error and performance of square-wave response parameter of direct current instrument transformer to be verified.
Preferably, the verification unit is mutual to the standard direct current of reception using Labview e measurement technologies and resampling technique
The output signal of sensor and direct current instrument transformer to be verified is handled.
According to another aspect of the present invention, the present invention provides a kind of method for verifying direct current instrument transformer square-wave response, described
Method includes：
Square wave current source carries out direct current instrument transformer square wave sound to direct current instrument transformer to be verified and the output of standard direct current instrument transformer
The square wave current that should be verified；
Under analog quantity checking mode, it is defeated that A/D acquisition modules gather direct current instrument transformer and standard direct current instrument transformer to be verified
The analog signal and transmission to correction verification module, correction verification module gone out calculates direct current instrument transformer to be verified according to the analog signal of reception
Elementary error and performance of square-wave response parameter；
Under digital quantity checking mode, the data signal that conversion unit of protocol exports to direct current instrument transformer to be verified enters line number
Transmitted after the analog signal exported to correction verification module, A/D acquisition modules collection standard direct current instrument transformer is transmitted after word protocol analysis
To the correction verification module of tester, data signal and standard direct current mutual inductance of the correction verification module according to the direct current instrument transformer to be verified of reception
The analog signal of device output calculates the elementary error and performance of square-wave response parameter of direct current instrument transformer to be verified.
Preferably, under digital quantity checking mode, clock synchronization unit is used to make correction verification module synchronous acquisition protocol conversion
Unit and the output signal of A/D acquisition modules transmission.
Preferably, correction verification module is according to the direct current instrument transformer to be verified of reception and the output signal meter of standard direct current instrument transformer
It is the Labview e measurement technologies and resampling used to calculate the elementary error of direct current instrument transformer to be verified and performance of square-wave response parameter
Technology.
Technical scheme provided by the present invention compared with prior art, technical scheme using signal generator and
Power amplifier provides high-power square wave current source, and mould is gathered by conversion unit of protocol, clock synchronization unit, high-precision A/D
Block and Labview instrumentation techniques realize the square-wave response school of the direct current instrument transformer of analog output and digital output
Test, measure direct current instrument transformer correlation transient performance parameter, realize direct current instrument transformer square-wave response elementary error, time delay,
The verification of the transient performance parameter such as rise/fall time, effectively improves the discrimination capabilities to direct current instrument transformer transient performance, it is ensured that
The measurement of DC transmission system control protection signal accurately and reliably, has important meaning to the safe and stable operation of DC transmission system
Justice.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is the structure chart of the device of the verification direct current instrument transformer square-wave response of the specific embodiment of the invention；
Fig. 2 is the flow chart of the method for the verification direct current instrument transformer square-wave response of the specific embodiment of the invention.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes
Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, be appreciated that and its
The linguistic context of association area has consistent implication, and is not construed as Utopian or overly formal meaning.
Fig. 1 is the structure chart of the device of the verification direct current instrument transformer square-wave response of the specific embodiment of the invention.Such as Fig. 1 institutes
Show, the device 10 of verification direct current instrument transformer square-wave response of the present invention includes square wave current source 101, standard direct current instrument transformer
102nd, conversion unit of protocol 103, clock synchronization unit 104 and verification unit 105.Wherein：
Square wave current source 101, it is used for the square wave current for providing verification direct current instrument transformer square-wave response；
Standard direct current instrument transformer 102, it is used to provide calibration signal for direct current instrument transformer square-wave response verification；
Conversion unit of protocol 103, the light data signal that direct current instrument transformer to be verified exports is parsed and is converted to electric numeral
Signal；
Clock synchronization unit 104, it is used for the output letter of synchronous acquisition direct current instrument transformer to be measured and standard direct current instrument transformer
Number；
Verification unit 105, it is used to gather standard direct current instrument transformer and the output signal of direct current instrument transformer to be verified is gone forward side by side
Row is calculated to obtain check results.
Preferably, the square wave current source 101 includes signal generator 111 and power amplifier 112, wherein, signal hair
Raw device 111 is used as square-wave signal source, and the signal level input of Parameter adjustable is provided for described device, and the power amplifier 112 carries
Amplify for the power stage of signal generator output signal.
Preferably, the frequency of the adjustable parameter of signal generator 111 including square-wave signal, pulse width and on
Liter/trailing edge the time.
Preferably, the conversion unit of protocol 103 includes photoelectric conversion module and flush bonding module, when direct current to be verified is mutual
During sensor output light data signal, electric data signal is converted to by photoelectric conversion module, and by flush bonding module to electric number
Word signal is acquired, is sent to the correction verification module of verification unit after protocol analysis and data packing.In the present embodiment, it is described
The FT3 frame format light data signals that direct current instrument transformer to be verified exports are parsed and are converted to band markers by conversion unit of protocol 103
The TCP/IP format digital signals of information.
Preferably, the verification unit 105 includes A/D acquisition modules 151 and correction verification module 152, has dual-channel analog
Signal input interface and digital signal input interface, wherein A/D acquisition modules 151 are used to gather standard direct current instrument transformer and treat school
Test the analog signal of direct current instrument transformer output, correction verification module 152 is used for according to the standard direct current instrument transformer of reception and to be verified straight
The output signal of current transformer calculates the elementary error and performance of square-wave response parameter of direct current instrument transformer to be verified.
Preferably, the verification unit 105 uses the standard direct current of Labview e measurement technologies and resampling technique to reception
The output signal of transformer and direct current instrument transformer to be verified is handled.
Fig. 2 is the flow chart of the method for the verification direct current instrument transformer square-wave response of the specific embodiment of the invention.Such as Fig. 2 institutes
Show, the method 200 of verification direct current instrument transformer square-wave response of the present invention is since step 201.
It is mutual to direct current instrument transformer to be verified and standard direct current instrument transformer output progress direct current in step 201, square wave current source
The square wave current of sensor square-wave response verification；
In step 202, under analog quantity checking mode, A/D acquisition modules gather direct current instrument transformer to be verified and standard straight
The analog signal of current transformer output is simultaneously sent to be verified straight according to the calculating of the analog signal of reception to correction verification module, correction verification module
The elementary error and performance of square-wave response parameter of current transformer；
In step 203, under digital quantity checking mode, numeral that conversion unit of protocol exports to direct current instrument transformer to be verified
Signal is transmitted to correction verification module, the simulation of A/D acquisition modules collection standard direct current instrument transformer output after carrying out digital protocol parsing
It is transferred to the correction verification module of tester after signal, correction verification module is according to the data signal and mark of the direct current instrument transformer to be verified of reception
The analog signal for collimating current transformer output calculates the elementary error and performance of square-wave response parameter of direct current instrument transformer to be verified.
In the present embodiment, conversion unit of protocol is that the FT3 frame format light data signals that direct current instrument transformer to be verified exports are parsed and turned
It is changed to after the TCP/IP format digital signals with time scale information to transmit to correction verification module and is handled.
Preferably, under digital quantity checking mode, clock synchronization unit is used to make correction verification module synchronous acquisition protocol conversion
Unit and the output signal of A/D acquisition modules transmission.
Preferably, correction verification module is according to the direct current instrument transformer to be verified of reception and the output signal meter of standard direct current instrument transformer
It is the Labview e measurement technologies and resampling used to calculate the elementary error of direct current instrument transformer to be verified and performance of square-wave response parameter
Technology.
Normally, all terms used in the claims are all solved according to them in the usual implication of technical field
Release, unless clearly being defined in addition wherein.All references " one/described/be somebody's turn to do【Device, component etc.】" all it is opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurately order, unless explicitly stated otherwise.
Claims (9)
1. a kind of device for verifying direct current instrument transformer square-wave response, it is characterised in that described device includes：
Square wave current source, it is used for the square wave current for providing verification direct current instrument transformer square-wave response；
Standard direct current instrument transformer, it is used to provide calibration signal for direct current instrument transformer square-wave response verification；
Conversion unit of protocol, the light data signal that direct current instrument transformer to be verified exports is parsed and is converted to electric data signal；
Clock synchronization unit, it is used for the output signal of synchronous acquisition direct current instrument transformer to be measured and standard direct current instrument transformer；
Verification unit, its be used to gathering the output signal of standard direct current instrument transformer and direct current instrument transformer to be verified and calculated with
Obtain check results.
2. device according to claim 1, it is characterised in that the square wave current source includes signal generator and power is put
Big device, wherein, signal generator provides the signal level input of Parameter adjustable, the work(for described device as square-wave signal source
Rate amplifier provides the power stage amplification of signal generator output signal.
3. device according to claim 2, it is characterised in that the signal generator adjustable parameter is believed including square wave
Number frequency, pulse width and rise/fall along the time.
4. device according to claim 1, the conversion unit of protocol includes photoelectric conversion module and flush bonding module, when
During direct current instrument transformer output light data signal to be verified, electric data signal is converted to by photoelectric conversion module, and pass through insertion
Formula module is acquired to electric data signal, the correction verification module of verification unit is sent to after the packing of protocol analysis and data.
5. device according to claim 1, it is characterised in that the verification unit includes A/D acquisition modules and calibration mode
Block, has dual-channel analog signal input interface and digital signal input interface, and wherein A/D acquisition modules are used to gather standard straight
Current transformer and the analog signal of direct current instrument transformer to be verified output, correction verification module are used for the standard direct current instrument transformer according to reception
The elementary error and performance of square-wave response parameter of direct current instrument transformer to be verified are calculated with the output signal of direct current instrument transformer to be verified.
6. according to the device described in claim 1 or 5, it is characterised in that the verification unit uses Labview e measurement technologies
The standard direct current instrument transformer of reception and the output signal of direct current instrument transformer to be verified are handled with resampling technique.
A kind of 7. method for verifying direct current instrument transformer square-wave response, it is characterised in that methods described includes：
Square wave current source carries out direct current instrument transformer square-wave response school to direct current instrument transformer to be verified and the output of standard direct current instrument transformer
The square wave current tested；
Under analog quantity checking mode, A/D acquisition modules gather direct current instrument transformer and standard direct current instrument transformer output to be verified
Analog signal is simultaneously sent basic according to the analog signal of reception calculating direct current instrument transformer to be verified to correction verification module, correction verification module
Error and performance of square-wave response parameter；
Under digital quantity checking mode, the data signal that conversion unit of protocol exports to direct current instrument transformer to be verified carries out digital association
School is transferred to after the analog signal exported to correction verification module, A/D acquisition modules collection standard direct current instrument transformer is transmitted after view parsing
The correction verification module of instrument is tested, correction verification module is defeated according to the data signal and standard direct current instrument transformer of the direct current instrument transformer to be verified of reception
The analog signal gone out calculates the elementary error and performance of square-wave response parameter of direct current instrument transformer to be verified.
8. according to the method for claim 7, it is characterised in that under digital quantity checking mode, clock synchronization unit is used for
Make correction verification module synchronous acquisition conversion unit of protocol and the output signal of A/D acquisition modules transmission.
9. according to the method for claim 7, it is characterised in that correction verification module according to the direct current instrument transformer to be verified of reception and
It is to adopt that the output signal of standard direct current instrument transformer, which calculates the elementary error of direct current instrument transformer to be verified and performance of square-wave response parameter,
Labview e measurement technologies and resampling technique.
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| CN201710470308.6A CN107390157A (en) | 2017-06-20 | 2017-06-20 | A kind of apparatus and method for verifying direct current instrument transformer square-wave response |
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| CN201710470308.6A CN107390157A (en) | 2017-06-20 | 2017-06-20 | A kind of apparatus and method for verifying direct current instrument transformer square-wave response |
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| CN110488214A (en) * | 2019-09-11 | 2019-11-22 | 国网冀北电力有限公司电力科学研究院 | DC mutual inductor verification instrument and working method |
| CN111679239A (en) * | 2020-07-23 | 2020-09-18 | 国网冀北电力有限公司计量中心 | System and method for verifying voltage transformer for flexible direct-current power grid |
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| PB01 | Publication | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20171208 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant after: China Electric Science Research Institute Co., Ltd. Applicant after: State Grid Corporation of China Applicant after: Electric Power Research Institute of State Grid Anhui Electric Power Company Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant before: China Electric Power Research Institute Applicant before: State Grid Corporation of China |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Haoliang Inventor after: Wan Peng Inventor after: Huang Junchang Inventor after: Pan Rui Inventor after: Nie Qi Inventor after: Li Dengyun Inventor after: Li He Inventor after: Xiong Qianzhu Inventor after: Xu Zili Inventor after: Yang Chunyan Inventor after: Liu Shaobo Inventor after: Hu Lvlong Inventor before: Hu Haoliang Inventor before: Nie Qi Inventor before: Li Dengyun Inventor before: Li He Inventor before: Xiong Qianzhu Inventor before: Xu Zili Inventor before: Yang Chunyan Inventor before: Liu Shaobo |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |