CN103969524B - Intelligent scanning merging unit of electronic transformer characteristic test method based on feedback - Google Patents
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Abstract
The present invention relates to a kind of intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback, the method feedback information based on combining unit dynamically adjusts scanning strategy, finally simulate the electronic mutual inductor body digital quantity signal of multichannel, the technology barriers of communicate between transformer body and combining unit " half is privately owned " are abolished, can solve the problem that electronic mutual inductor body and combining unit can only carry out the deficiency of integrated testability, eliminating combining unit self performance cannot individual authentication and the hidden danger buried of test, improve for the technology that combining unit self and electronic mutual inductor are overall and important leverage is provided.The scanning process of combining unit multiport, based on feedback information automatic discrimination adjustable strategies, quick and precisely and without artificial differentiates, the intelligence degree of test is high.
Description
Technical field
The invention belongs to the characteristic test field of merging unit of electronic transformer in intelligent grid (MU), for test
To as if receive electronic mutual inductor body digital quantity signal combining unit (MU), refer to a kind of can based on feedback intelligence
Can scanning electron formula transformer combining unit characteristic test method.
Background technology
Between electronic mutual inductor body and combining unit (hereinafter referred to as MU) by fiber optic serial communications sampled value,
The information such as transformer state, currently, owing to not having codes and standards to be standardized this agreement, thus host-host protocol is in
" half is privately owned " state, this just brings restriction to test, as an entirety, the body of transformer and MU can only be carried out performance
Test.Integrated testability is the most important, but MU is as the equipment of an independent operating, the performance of its data synchronization processing, stable state
Amplitude and phase accuracy, absolute time-delay characteristics, message output discreteness, the characteristic of Software Integration algorithm, transient characterisitics etc., all
It is to carry out independent studies the link tested.Replace monomer test MU self performance cannot be had with integrated testability
Effect is demonstrate,proved, and the problem existed may be covered by the final result of integrated testability, hide some dangers for, when integrated testability is the most up to standard,
It is unfavorable for location and the solution of problem, on long terms, the deep development of MU correlation technique can be limited.Along with domestic different manufacturers
Between electronic mutual inductor and combiner with the use of situation get more and more, the demand of combining unit independent test is more and more anxious
Compel, it is, therefore, necessary to the MU receiving the input of electronic mutual inductor body digital quantity is launched independent performance test.
The most domestic electronic mutual inductor body output is fiber optic serial communication, the transmission bandwidth of different manufacturers and adopting
Sample rate is discrepant, and bandwidth has 1.6Mbit/s, 2.0Mbit/s, 4.0Mbit/s tri-kinds, sample rate have every cycle 80 point, 100
Point, 200 points, 256 4 kinds.The transformer of different manufacturers specifically uses at present which kind of bandwidth, which kind of sample rate have been public
The information opened, but to be each family self-defining and is reluctant for serial data frame length, Frame byte implication, the definition etc. of byte position
The disclosed private information of meaning, here it is " half the is privately owned " state communicated between current transformer body and MU, is that MU monomer is surveyed
The maximum technology barrier of examination.
For the stable state and transient characterisitics test angle of MU, it is crucial that need to apply an electronic type mutual inductance to MU
The sampled value information of device body, other information contenies are unrelated with test.Send if able to get electronic mutual inductor body
Data frame length, and the sampled value deviation post in a data frame of correspondence can be found, then can to electronic mutual inductor this
The sampled value of body is simulated sending, and controls the output of sampled value by the requirement of testing experiment, thus MU is launched every stable state
Test with transient characterisitics.
Summary of the invention
For the deficiency in prior art, present invention aim at proposing a kind of can be based on the intelligent scanning electronic type of feedback
Transformer combining unit characteristic test method, the method has abolished communicate between transformer body and combining unit " half is privately owned "
Technology barrier, improves for the technology that combining unit self and electronic mutual inductor are overall and provides important leverage.
For achieving the above object, the technical scheme is that
A kind of merging unit of electronic transformer carries out the method for testing of independent test, and its method is: join before (1) scanning
Put；First, the initial condition of configuration scanning, described initial condition bandwidth, sample rate, the scope of frame length, or known odd even
The information such as verification, CRC (Cyclic Redundancy Check is called for short CRC) mode.
(2) all input ports of MU are scanned；After starting scanning, Power PC Processor is primarily based on the passage of MU feedback
Effective marker bit scan goes out data frame length, and the channel data values being then based on MU feedback scans the skew ground of alternating data acquisition
All input ports of MU are completed above-mentioned scanning by location successively；When at least an input port scans successfully, then enter step
Suddenly (3), otherwise test terminates.
(3) test phase of MU；After scanning is successfully completed, enter the test phase to MU, according to MU characteristic test
Requirement, the method for the test phase of its MU includes the following:
(3a) steady-state method of test；Initially enter steady state test, when steady state test, control electronic mutual inductor simulation defeated
All test phases such as the sampled value amplitude that goes out, frequency, virtual value, phase place, harmonic wave, output channel sum, frame loss rate, frame losing mode
Pass information, and using the signal of electricity this minor transformer simulation output as standard signal, the MU output sampled value letter that will receive
Cease as test product information, complete all test jobs that steady-state behaviour is relevant；
(3b) transient test, then, steady state test enters the transient test stage after completing, by testing the software tool according to MU
Body transient characterisitics index, needed for the information configuration relay protections such as transient state grade, time constant, specified symmetrical short-circuit electric current multiple
Single energising or double time energising transient test amounts, using the value of output as standard source signal, the sampled value conduct of MU output
Test product signal, completes the performance test that transient state is relevant.
The solution have the advantages that:
The present invention is that feedback information based on combining unit dynamically adjusts scanning strategy, finally simulates the electronics of multichannel
Formula transformer body digital quantity signal, has abolished the technology barriers of communicate between transformer body and combining unit " half is privately owned ".
And by the scanning process of multiport based on feedback information automatic discrimination adjustable strategies, quick and precisely and without artificial differentiate,
The intelligence degree of test is high；It can quantitative configuration Multi-path electricity minor transformer body simulation output, for combining unit
Every stable state and transient test provide the most required sampled value information；And can enter for merging unit of electronic transformer
Row independent test, eliminates transformer body and the deficiency of combining unit integrated testability existence, eliminates combining unit self performance
Cannot the hidden danger buried of independent test, the technology overall for combining unit self and electronic mutual inductor provides safeguard.
Additionally, the powerful data that hardware structure combines Power PC Processor process and communication capacity, and FPG's is strong
Big sequencing contro and logical operation capability, process for multiport intelligent scanning, MU packet parsing, stable state and Temporal Data and provide
Strong guarantee.The method is not limited, not by electronic mutual inductor by the concrete producer of combining unit, model and output protocol
Concrete principle, producer and the restriction of model, have great versatility.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the accompanying drawings with detailed description of the invention；
Fig. 1 is that present invention intelligent scanning type merging unit of electronic transformer characteristic test system structure based on feedback is shown
It is intended to；
Fig. 2 is the flow chart that the present invention tests；
Fig. 3 is the single port data frame length scanning process figure of this law.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with
Detailed description of the invention, is expanded on further the present invention.
See Fig. 1 to Fig. 3, the test side carrying out independent test for merging unit of electronic transformer of the present embodiment
Method, a kind of based on feedback intelligent scanning type merging unit of electronic transformer characteristic detecting method, the method for survey
Trying to as if receive the combining unit (MU) of electronic mutual inductor body digital quantity signal, referring to one can be with automatic imitation
Electronic mutual inductor body digital output, and then MU is launched the method for testing of every test, it is based on combining unit
Feedback information dynamically adjusts scanning strategy, obtains the data frame length that electronic mutual inductor body sends, and finds adopting of correspondence
Sample value deviation post in a data frame, is simulated sending to the sampled value of electronic mutual inductor body, finally simulates many
The electronic mutual inductor body digital quantity signal on road, has abolished the skill of communicate between transformer body and combining unit " half is privately owned "
Art barrier.The scanning process of combining unit multiport based on feedback information automatic discrimination adjustable strategies, quick and precisely and without
Artificial differentiation, the intelligence degree of test is high.
The present embodiment to carry out independent test to the combining unit of electronic mutual inductor, it is necessary to solves transformer body and conjunction
And communication " half the is privately owned " problem between unit, in order to it is combined unit and applies tested number, leading to of current domestic all producers
Letter is fiber optic serial communication, and optic communication device is Universal Receiver Transmitter part, and optical wavelength is 820nm～860nm, and optical fiber is
The multimode fibre of 62.5/125um, light sends and the strength range of light-receiving is the widest, and this makes the connection of physical layer extremely hold
Easily.
At present, the baud rate of electronic mutual inductor serial communication exist three kinds of situation: 1.6Mbit/s, 2.0Mbit/s,
4.0Mbit/s, sample rate four kinds of situations of existence: 4kHz, 5kHz, 10kHz, 12.8kHz.Each character is formed by 11, and 1 is opened
Dynamic position is " 0 ", 8 data bit, 1 parity check bit, and 1 stops position is " 1 ":
Serial data frame structure is:
Wherein, parity check bit uses odd or even parity check, CRC (CRC, Cyclic
Redundancy Check) it is to sue for peace or sue for peace to negate, the occurrence of total amount of byte N, and the implication of each byte, each byte
It is privately owned that the implication of position is each producer, and this is the maximum technology barrier of MU independent test.
Based on above-mentioned situation, the present invention sets up a set of test system, structure using PowerPC and FPGA as primary processor
Fig. 1 is shown in by schematic diagram.System design Multi-path electricity minor transformer simulation output, sets up physical layer with MU and is connected, receive MU simultaneously
Standard output as the feedback information of system.The simulation output of Multi-path electricity minor transformer is completed serial communication by PowerPC
The work such as the assignment of Frame, even-odd check, CRC check, frame length control, and the decision-making of sending strategy, are completed string by FPGA
Row data physical layer sequencing contro, is made up of the synchronization module of system, it is provided that the temporal reference of FPGA, really High Accuracy Constant Temperature crystal oscillator
Protect the degree of accuracy of the sequential of serial communication, reduce time error and bring impact to test.
The FT3 fiber optic serial data of MU output or the fiber optic Ethernet data of IEC61850-9-1, IEC61850-9-2 connect
Receiving and carried out interface by FPGA equally, the packet of reception is given to PowerPC by FPGA, PowerPC carry out packet
Unpacking and extract the passage effective marker position that MU sends, passage effective marker position i.e. represents the Current electronic formula that MU is differentiated
The passage of transformer body input and data whether correct effectively, so the effective marker position fed back by MU is detected and just can be obtained
Knowing that the simulation output of Current electronic formula transformer is the most correct effectively, by this closed loop feedback, PowerPC can finally determine
The information such as correct data frame length and checking mode.
Test to MU is finally to need to apply AC sampling value information to MU, so without all bytes to Frame
Implication is scanned, and after scanning successfully based on above-mentioned data frame structure, PowerPC controls simulation output from initial offset position
Start to apply of ac, whether with the presence of data channel of ac in being exported by detection MU, whether draw current offset position
Correctly, if there is multi-channel sampling value, then can obtain passage corresponding relation simultaneously.
The overall flow of test software is shown in that Fig. 2, the configuration information of present invention test include transient state grade, specified symmetrical short-circuit
Electric current multiple, short circuit current size, there is the stream time, without stream time, the content of DC component, dc-decay time constant.It is surveyed
Method for testing specifically includes as follows:
(1) configuration before scanning；By the initial condition of test software arrangements scanning, such as bandwidth, sample rate, the scope of frame length,
Or the information such as known even-odd check, CRC mode.
(2) all input ports of the combining unit of scanning electron formula transformer；In the present embodiment, first test software enter
Configuration work before row scanning, the scanning to MU port is divided into data frame length scanning and two rank of sampled value offset address scanning
Section.Its method is as follows:
(2a), after starting scanning, Power PC Processor is primarily based on the passage effective marker bit scan of combining unit feedback
Go out data frame length.Fig. 3 is the scanning process that single port carries out data frame length, due to parity check sum CRC generating mode not
Knowing, scan according to " odd, CRC sue for peaces pattern ", " odd, CRC sue for peace and negate pattern ", " even parity check, CRC sue for peace mould
Formula ", " even parity check, CRC summation negate pattern " four patterns are carried out successively.
Under each pattern, initial frame length is from the beginning of 5 bytes, FPGA (field programmable gate array, Field
Programmable Gate Array) send Frame continue 0.2s time, to ensure enough MU passage that may be present
Recover or position, effective marker position acknowledging time, real-time Acquisition channel effective marker from the message of MU feedback during transmission
Position, confirms starting whether FPGA has flag bit to become 1 from 0 after MU sends data.For FT3 message, passage effective marker
Position status word 1 from data block 3 and status word 2 are extracted；For IEC61850-9-1 message, from message the 8th word reciprocal
The status word 1 of joint beginning and status word 2 are extracted；For IEC61850-9-2 message, from the data product of each data channel
Matter word extracts.Without any flag bit set, then data frame length is added 1, restart the transmission process of a new round, hold
Continuous 0.2s, still continues to monitor the passage effective marker position of MU to determine whether to scan successfully.When frame length reaches 100 bytes still
Time unsuccessful, illustrate to scan under present mode unsuccessful, be transferred to next pattern and continue to scan on.As long as sentencing in scanning process
Break and position, passage effective marker position, i.e. show that frame length scans successfully.
(2b) Power PC Processor scans the skew ground of alternating data acquisition based on the channel data values that combining unit is fed back
Location, all input ports being combined unit successively complete above-mentioned scanning；When at least an input port scans successfully, then
Entering step (3), otherwise test terminates.
After port frame long scan success, i.e. entering into sampled value offset address sweep phase, flow chart is shown in Fig. 3.At present, first
First from the beginning of offset address 0, two bytes of continuous print fill in AC sampling value information, after MU sends sampled value information,
From the data set that MU feeds back to, monitor each data channel sampled value information in real time, when arbitrary in the output of MU simultaneously
There is of ac in passage, then add 1 by offset address, still fills in alternating data acquisition on current and next successive byte position
It is sent to MU, repeats said process, until scanning most end two byte of frame length.If any one data of MU in scanning process
Passage occurs in that alternating data acquisition, then can be concluded that the offset address that currently transmitted offset address is sampled value, and specify that
And the corresponding relation between the data channel of MU output, the end of scan to this port of MU.
(3) test phase of MU；After scanning is successfully completed, entering the test phase to MU, it is according to MU characteristic test
Requirement, be broadly divided into steady state test and the big class of transient test two, it includes the following:
(3a) steady-state method of test: initially enter steady state test, when steady state test, is controlled electronic type by test software mutual
The sampled value amplitude of sensor simulation output, frequency, virtual value, phase place, harmonic wave, output channel sum, frame loss rate, frame losing mode etc.
All test relevant informations, the output sampled value of the MU received as standard signal, is believed by test software by the signal of output
Cease as test product information, complete all test jobs that steady-state behaviour is relevant.
In the present embodiment, the index of steady state test includes that ratio, phase contrast, combination misalignment, absolute delay time, message are trembled
Dynamic time, specified delay time, harmonic wave accuracy, signal to noise ratio etc., when, after the end of scan to all of the port, i.e. entering into MU
Steady state test process, test software according to steady state test functional requirement, arranges total way of the sampled value sent to MU, exchange
The frequency of amount, amplitude, phase place, harmonic wave, to complete ratio under MU stable state, angular difference, combination misalignment, absolute delay time, specified
Delay time, message dispersion, signal to noise ratio, harmonic wave precision, integral accuracy, precision, the multi-channel synchronous etc. of keeping time are a series of
Index test.The communication abnormality situations such as quantitative frame losing, wrong frame, viscous frame can be carried out, to evaluate and test the disposal ability of MU simultaneously.
(3b) transient test method: then, steady state test enters the transient test stage after completing, by test software according to MU
Concrete transient characterisitics index, according to such as transient characterisitics indexs such as transient state grade, time constant, specified symmetrical short-circuit electric current multiples
Single energising needed for information configuration transient test or double energising transient test amounts, believe the value of output as standard source
Number, the sampled value of MU output, as test product signal, completes the performance test that transient state is relevant.
The index of the transient test of the present embodiment includes instantaneous error electric current, maximum current peak error, combination misalignment, declines
Subtract time constant error, transient state delay time etc., its transient test method particularly includes: after steady state test completes, can enter
The transient test link of MU, by testing the letters such as the software transient state grade according to MU, time constant, specified symmetrical short-circuit electric current multiple
Single energising needed for breath configuration relay protection or double energising transient test amounts.MU transient state is obtained by record ripple and data analysis
Under maximum instantaneous peak error, time constant error, combination misalignment, integration transient characterisitics, all transient state such as transient state time delay refer to
Mark；Thus complete all merging unit of electronic transformer characteristic test processes.
Based on above-mentioned, the present invention by the scanning process of multiport based on feedback information automatic discrimination adjustable strategies, soon
Speed accurately and differentiates without artificial, and the intelligence degree of test is high；It can quantitative configuration Multi-path electricity minor transformer body
Simulation output, every stable state and transient test for combining unit provide any required sampled value information；And can be for
Merging unit of electronic transformer carries out independent test, eliminates transformer body and combining unit integrated testability exists not
Foot, eliminate combining unit self performance cannot the hidden danger buried of independent test, for combining unit self and electronic mutual inductor
Overall technology provides safeguard.
And, the present invention is that feedback information based on combining unit dynamically adjusts scanning strategy, finally simulates multichannel
Electronic mutual inductor body digital quantity signal, abolished the technology of communicate between transformer body and combining unit " half is privately owned "
Barrier.The powerful data combining Power PC Processor on hardware structure process and communication capacity, and during FPG powerful
Sequence controls and logical operation capability, and processing to provide for multiport intelligent scanning, MU packet parsing, stable state and Temporal Data has by force
The guarantee of power.The method is not limited by the concrete producer of combining unit, model and output protocol, not concrete by electronic mutual inductor
The restriction of principle, producer and model, has great versatility.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (7)
1. an intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback, it is characterised in that its side
Method is: configuration before (1) scanning；First the initial condition of scanning is configured；
(2) all input ports of the combining unit of scanning electron formula transformer；Its method step is as follows:
(2a), after starting scanning, the passage of the channel data values that Power PC Processor is primarily based on combining unit feedback has criterion
Will bit scan goes out data frame length；
(2b) Power PC Processor be then based on combining unit feedback described channel data values scan alternating data acquisition
Offset address, all input ports being combined unit successively complete above-mentioned scanning；When at least an input port is scanned into
During merit, then entering step (3), otherwise test terminates；
(3) test phase of combining unit；After scanning is successfully completed, enter the test phase being combined unit, according to merging
The requirement of element characteristics test, the method for the test phase of its combining unit includes the following:
(3a) steady-state method of test: initially enter steady state test, when steady state test, controls electronic mutual inductor simulation output
All test relevant informations, and using the signal of this electronic mutual inductor simulation output as standard signal, the merging that will receive
The output sampled value information of unit, as test product information, completes all test jobs that steady-state behaviour is relevant；
(3b) transient test method: then, steady state test enters the transient test stage after completing, by testing the software tool according to MU
Body transient characterisitics index, surveys according to the single energising needed for transient characterisitics indication information configuration transient test or double energising transient state
Examination amount, using the value of output as standard source signal, the sampled value of combining unit output, as test product signal, completes transient state and is correlated with
Performance test.
Intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback the most according to claim 1,
It is characterized in that, described initial condition includes bandwidth, sample rate, the scope of frame length, known parity check sum cyclic redundancy school
Test the information of yard mode.
Intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback the most according to claim 1,
It is characterized in that, in described step (3a), described test relevant information includes sampled value amplitude, frequency, virtual value, phase place, humorous
Ripple, output channel sum, frame loss rate and frame losing mode.
Intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback the most according to claim 1,
It is characterized in that, described step (3b)) in, above-mentioned transient characterisitics indication information includes transient state grade, time constant and specified right
Claim short-circuit current multiple.
Intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback the most according to claim 1,
It is characterized in that, in described step (3), the simulation output of Multi-path electricity minor transformer is set up physical layer with combining unit and is connected,
Receive the standard output feedback information as system of combining unit simultaneously；The analog output signal of Multi-path electricity minor transformer leads to
Cross Power PC Processor and complete the assignment of serial communication data frame, even-odd check, CRC verification, frame length control
With the decision-making work of sending strategy, the analog output signal of Multi-path electricity minor transformer completes serial data physical layer by FPGA
Sequencing contro, and the synchronization module of system is constituted by High Accuracy Constant Temperature crystal oscillator, it is provided that the temporal reference of FPGA, it is ensured that serial
The degree of accuracy of the sequential of communication.
Intelligent scanning merging unit of electronic transformer characteristic detecting method based on feedback the most according to claim 1,
It is characterized in that, in described step (2a), the passage effective marker bit scan that Power PC Processor feeds back based on combining unit goes out
Data frame length, its method particularly includes: the FT3 fiber optic serial data of combining unit output or IEC61850-9-1, IEC61850-9-
The fiber optic Ethernet data receiver of 2 carries out interface again by FPGA, and the packet of reception is given to PowerPC process by FPGA
Device, is unpacked and extracts, by what Power PC Processor carried out packet, the passage effective marker position that MU sends, and passage has criterion
Will position i.e. represent the passage of combining unit differentiated Current electronic formula transformer body input and data whether correct effectively, institute
Just learn that the simulation output of Current electronic formula transformer is the most correct effectively, by this with the effective marker position detection fed back by MU
One closed loop feedback, the information of correct data frame length and checking mode can be finally determined in PowerPC process.
A kind of intelligent scanning merging unit of electronic transformer Characteristics Detection side based on feedback the most according to claim 1
Method, it is characterised in that in described step (2b), the test being combined unit is finally to need to apply AC sampling to combining unit
Value information, it is not necessary to all byte implications of Frame are scanned, after scanning successfully based on above-mentioned data frame structure, by
Power PC Processor is controlled simulation output and starts to apply of ac from initial offset position, in being exported by combining data detection unit
Whether with the presence of data channel of ac, show that current offset position is the most correct, if there is multi-channel sampling value, the most simultaneously
To passage corresponding relation.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104750096B (en) * | 2014-04-30 | 2017-08-22 | 许继电气股份有限公司 | A kind of method of analog input formula combining unit accuracy correction |
| CN105182266B (en) * | 2015-10-12 | 2017-10-10 | 国家电网公司 | A kind of combining unit channel detection methods |
| CN106226588A (en) * | 2016-07-05 | 2016-12-14 | 国家电网公司 | A kind of optical current acquisition method adapting to travelling wave ranging demand |
| CN106526524A (en) * | 2016-09-30 | 2017-03-22 | 广西电网有限责任公司电力科学研究院 | Electronic transformer transient state test system based on RTDS real-time simulation |
| CN109960244B (en) * | 2019-03-05 | 2024-03-15 | 中国电力科学研究院有限公司 | Closed loop detection method and system for digital input quantity merging unit |
| CN113884964A (en) * | 2021-10-27 | 2022-01-04 | 云南电网有限责任公司电力科学研究院 | AC/DC electronic mutual inductor operation inspection instrument |
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