CN105182266B - A kind of combining unit channel detection methods - Google Patents
A kind of combining unit channel detection methods Download PDFInfo
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- CN105182266B CN105182266B CN201510657317.7A CN201510657317A CN105182266B CN 105182266 B CN105182266 B CN 105182266B CN 201510657317 A CN201510657317 A CN 201510657317A CN 105182266 B CN105182266 B CN 105182266B
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000004088 simulation Methods 0.000 claims abstract description 23
- 238000001228 spectrum Methods 0.000 claims abstract description 15
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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Abstract
A kind of combining unit channel detection methods, multi-channel analog current/voltage signal source are accessed the analog signal terminal of tested combining unit, and the output of tested combining unit message is accessed into passage configuration detection device；Control simulation signal generator amount of exports tentering value；Adjust the phase angle of each road simulation signal generator so that the phase difference of any 2 tunnel analog signal is unequal, and the difference of phase difference is larger；The digital message of the tested combining unit output of parsing, carries out Fourier transformation by each channel data sequence, tries to achieve each channel signal frequency spectrum；The excessive passage of distortion factor is regarded as into non-valid channel to be rejected；The phase angle of fundamental frequency in each effective channel frequency spectrum is calculated, and calculates the difference between each channel phases angle, according to each passage corresponding relation of multilevel iudge with setting result；The setting no-load voltage ratio of each passage is calculated according to the analog signal rated value of the amplitude of fundamental frequency in each channel frequency spectrum and input, combining unit sampling error Characteristics Detection efficiency is effectively improved.
Description
Technical field
The invention belongs to the gauge check field in intelligent grid, more particularly to a kind of merging list with AC sampling function
First channel characteristic detection method.
Background technology
With the development of intelligent power grid technology, in second generation intelligent substation, traditional transformer adds band AC sampling work(
The model comparision of the combining unit of energy is universal, because the type combining unit is measuring apparatus, it is therefore desirable to which it is measured accurately
Degree is detected.
Combining unit with AC sampling function is typically that multichannel electric current and plurality of voltages signal are sampled simultaneously, will
The real-time sampling data of each passage is incorporated in digital message all the way and transmitted.
However, in the detection before combining unit is installed, the SCD configuration files inconvenience of tested combining unit obtains or is not
Final version, therefore, it is impossible to it is convenient accurately judge each analog input interface with numeral message each channel data it is corresponding
Relation and no-load voltage ratio.
At present, conventional determination methods are mainly application specific software and read SCD configuration files and check configuration code, or
All depict the data of all passages in message as waveform artificial judgment.These methods can not lead to the physics of combining unit
Road is intuitively mapped with message passage, there is certain limitation, and requires higher to operating personnel, with wrongheaded
May, if it is determined that mistake, the detection work of combining unit will be unable to carry out.
The content of the invention
In view of the above-mentioned problems, patent of the present invention provides a kind of combining unit channel detection methods, merge for correct decision
Unit physical channel and the corresponding relation and setting no-load voltage ratio of message passage.
Technical scheme：A kind of combining unit channel detection methods, it is characterised in that comprise the following steps：
1) multi-channel analog current/voltage signal source is accessed to the analog signal terminal of tested combining unit, and closed tested
And unit message output access passage configuration detection device；
2) simulation signal generator amount of exports tentering value is controlled；
3) phase angle of each road simulation signal generator is adjusted so that the phase difference of any 2 tunnel analog signal is unequal, and phase
The difference of potential difference is larger；
4) the digital message of tested combining unit output is parsed, each channel data sequence is subjected to Fourier transformation, tried to achieve
Each channel signal frequency spectrum；
5) the excessive passage of distortion factor is regarded as into non-valid channel to be rejected；
6) phase angle of fundamental frequency in each effective channel frequency spectrum is calculated, and calculates the difference between each channel phases angle, according to
Each passage corresponding relation of multilevel iudge with setting result；
7) setting for calculating each passage according to the analog signal rated value of the amplitude of fundamental frequency in each channel frequency spectrum and input becomes
Than.
The step 4) in digital message be IEC61850 forms data message.
A kind of combining unit channel detection system, including tested combining unit, it is characterised in that：The tested combining unit
Input and output be connected respectively with passage configuration detection device, passage configuration detection device includes the analog signal that is sequentially connected
Source, control module, data computation module and packet parsing module, the analog quantity that simulation signal generator is connected to tested combining unit are defeated
Enter end, the tested combining unit of packet parsing module connection receives and parses through the message of tested combining unit output.
The control module control simulation signal generator exports corresponding analog signal, and receives simultaneously from data calculating mould
The frequency spectrum data of block, rejects non-valid channel, carries out the calculating of phase angle and no-load voltage ratio with being compared, determines that passage is configured.
The simulation signal generator realizes that 6 road alternating voltages of synchronism output are believed by signal generating module and power amplifier module
Number source and 6 road ac current signal sources.
The control module selects industrial computer.
The tested combining unit is installed at the scene and accesses transformer secondary circuit, and TV and TA signals are converted to
IEC61850 messages are used for rear class equipment.
The technique effect of the present invention：1st, by the phase angle of reasonable set simulation signal generator, band AC sampling work(can be achieved
Can combining unit passage configuration (including passage corresponding relation and no-load voltage ratio setting) full-automatic judgement, so as to solve in nothing
In the case that method obtains SCD configuration files, combining unit passage configuration determination difficulty is tested greatly, time-consuming, the problem of error-prone,
The efficiency of sampling error Characteristics Detection before combining unit is installed can be effectively improved；
2nd, for the combining unit after the completion of setting, setting result can be also checked by this method, so as to avoid setting
During mistake, it is ensured that combining unit is normally run；
3rd, basis for estimation be each channel signal phase angle between relative quantity, be not required to synchronous with clock, it is adaptable to synchronization and
Non-synchronized manner.
In a word, the present invention can not obtain SCD configuration files and without synchronizing signal in the case of, to band AC sampling
The combining unit of function passage configuration carry out automatic detection so that quick obtaining be tested combining unit passage corresponding relation and
No-load voltage ratio sets situation, effectively improves combining unit sampling error Characteristics Detection efficiency.
Brief description of the drawings
Fig. 1 is detecting system structural representation of the present invention；
Fig. 2 is detection method flow chart.
In figure：100-it is tested combining unit, 200-passage configuration detection device, 210-simulation signal generator, 220-control
Molding block, 230-data computation module, 240-packet parsing module.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings：
As shown in Fig. 2 a kind of combining unit channel detection methods, it is characterised in that comprise the following steps：
1) multi-channel analog current/voltage signal source is accessed to the analog signal terminal of tested combining unit, and closed tested
And unit message output access passage configuration detection device；
2) simulation signal generator amount of exports tentering value is controlled；
3) phase angle of each road simulation signal generator is adjusted so that the phase difference of any 2 tunnel analog signal is unequal, and phase
The difference of potential difference is larger；
4) the digital message of tested combining unit output is parsed, each channel data sequence is subjected to Fourier transformation, tried to achieve
Each channel signal frequency spectrum；
5) the excessive passage of distortion factor is regarded as into non-valid channel to be rejected；
6) phase angle of fundamental frequency in each effective channel frequency spectrum is calculated, and calculates the difference between each channel phases angle, according to
Each passage corresponding relation of multilevel iudge with setting result；
7) setting for calculating each passage according to the analog signal rated value of the amplitude of fundamental frequency in each channel frequency spectrum and input becomes
Than.
The step 4) in digital message be IEC61850 forms data message.
As shown in Figure 1：A kind of combining unit channel detection system, including tested combining unit 100, it is characterised in that：Institute
The input and output for stating tested combining unit 100 are connected with passage configuration detection device 200 respectively, passage configuration detection device
200 simulation signal generator 210, control module 220, data computation module 230 and packet parsing modules 240 including being sequentially connected,
Simulation signal generator 210 is connected to the analog input end of tested combining unit 100, and the connection of packet parsing module 240 is tested to be merged
Unit 100 receives and parses through the message that tested combining unit 100 is exported.
The control of control module 220 simulation signal generator 210 exports corresponding analog signal, and receives simultaneously from data
The frequency spectrum data of computing module 230, rejects non-valid channel, carries out the calculating of phase angle and no-load voltage ratio with being compared, determines that passage is configured.
The simulation signal generator 210 is realized 6 road alternating currents of synchronism output by signal generating module and power amplifier module
Press signal source and 6 road ac current signal sources.
The control module 220 selects industrial computer.
The tested combining unit 100 is installed at the scene and accesses transformer secondary circuit, and TV and TA signals are changed
Used for IEC61850 messages for rear class equipment.
The Cleaning Principle of system：
When merging unit channel configuration check, the simulation of combining unit passage configuration detection device 200 is believed first
Number source 210 is connected to the analog input terminal of tested combining unit.The analog input terminal of generally tested combining unit has 3
Road voltage signal adds 3 road current signals, 6 road voltage signals (bus type) or 6 road current signal (cabinet-type) several combinations, but not
It is limited to combinations thereof, combining unit is tested from the selection analog quantity access of simulation signal generator 210 according to various combination.
Then, control module 220 controls simulation signal generator 210 by the 6 specified amplitudes of road analog signal output, by voltage, electricity
The specified amplitude normalization of stream is expressed as A0.Next, the control simulation signal generator 210 of control module 220 sets the i-th tunnel simulation letter
N's takes in number specific angle phi i of output, the then 6 tunnel analog signals that simulation signal generator 210 is exported such as formula (1) expression, formula
Value is usually 6.
For 6 road signals, phase angleRecommendation value such as formula (2) shown in, but be not limited to the formula value, make
Obtain the phase difference of arbitrarily 2 tunnels (i.e. the i-th tunnel and jth road) analog signalIt is unequal, and phase difference difference compared with
It is big to be easy to system differentiation.
The data sequence of each passage after packet parsing is subjected to Fourier transformation simultaneously, the frequency for obtaining each passage is calculated
Spectrum, and deviation factor of wave is more than limit value pthdPassage regard as non-valid channel and rejected.Deviation factor of wave limit value
pthdValue recommend but be not limited to 5%.
Take out the signal phase of each effective passageAnd difference is asked for respectivelyIt is corresponding with setting value progress, you can
Judge the corresponding relation of each passage of tested combining unit.Shown in Φ discrimination formulas such as formula (3), when according to combining unit data
The inter-channel phase difference tried to achieveWith setting valueBeing more or less the same when threshold values Φ, (threshold values Φ recommends but is not limited to take
3 ° or 5 ° of representative value), you can think phase matched.
For example, the phase angle of 2 passages of setting and 3 passages is respectively 10 ° and 30 °, and packet parsing calculates what is obtainedThen corresponding analog channels 2 of passage i in message, and j pairs of passage in message
The analog channel 3 answered.
It is determined that after each passage corresponding relation, no-load voltage ratio M/N, wherein A that each passage is set can be calculated according to formula (4)iFor
The revision of the convention value of the calculating amplitude of i-th passage, if for example, certain path computation goes out amplitude for 998A, the revision of the convention is 1000A nearby, if
Secondary specified amplitude A0For 5A, then the passage no-load voltage ratio is 1000A/5A.
M/N=Ai/A0 (4)
A kind of combining unit channel detection methods and system of the present invention can not obtain SCD configuration files and without same
In the case of walking signal, the passage configuration to the combining unit with AC sampling function carries out automatic detection, so that quick obtaining
The passage corresponding relation and no-load voltage ratio setting situation of tested combining unit, effectively improve combining unit sampling error Characteristics Detection effect
Rate.
Claims (2)
1. a kind of combining unit channel detection methods, it is characterised in that comprise the following steps：
1) multi-channel analog current/voltage signal source is accessed to the analog signal terminal of tested combining unit, and merges single by tested
First message output access passage configuration detection device；
2) simulation signal generator amount of exports tentering value is controlled；
3) phase angle of each road simulation signal generator is adjusted so that the phase difference of any 2 tunnel analog signal is unequal, and phase difference
Difference it is larger；
4) the digital message of tested combining unit output is parsed, each channel data sequence is subjected to Fourier transformation, is tried to achieve each logical
Road signal spectrum；
5) the excessive passage of distortion factor is regarded as into non-valid channel to be rejected；
6) phase angle of fundamental frequency in each effective channel frequency spectrum is calculated, and calculates the difference between each channel phases angle, according to setting
Determine each passage corresponding relation of multilevel iudge of result；
7) the setting no-load voltage ratio of each passage is calculated according to the analog signal rated value of the amplitude of fundamental frequency in each channel frequency spectrum and input.
2. a kind of combining unit channel detection methods according to claim 1, it is characterised in that the step 4) in number
Word message is the message of IEC61850 forms.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969524A (en) * | 2014-04-18 | 2014-08-06 | 国家电网公司 | Intelligent scanning electronic transformer combination unit characteristic testing method based on feedback |
| CN103995198A (en) * | 2014-05-22 | 2014-08-20 | 国家电网公司 | Analog input merging unit metering performance detection device and detection method thereof |
| CN104062617A (en) * | 2014-07-08 | 2014-09-24 | 国家电网公司 | Merging-unit metrological-characteristic on-site detecting system and method thereof |
| CN104316799A (en) * | 2014-10-30 | 2015-01-28 | 国家电网公司 | Metering merging unit checking device and method |
| CN104914405A (en) * | 2015-06-26 | 2015-09-16 | 国家电网公司 | Detection method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101363045B1 (en) * | 2007-04-20 | 2014-02-17 | 현대중공업 주식회사 | Testing device for Merging unit |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969524A (en) * | 2014-04-18 | 2014-08-06 | 国家电网公司 | Intelligent scanning electronic transformer combination unit characteristic testing method based on feedback |
| CN103995198A (en) * | 2014-05-22 | 2014-08-20 | 国家电网公司 | Analog input merging unit metering performance detection device and detection method thereof |
| CN104062617A (en) * | 2014-07-08 | 2014-09-24 | 国家电网公司 | Merging-unit metrological-characteristic on-site detecting system and method thereof |
| CN104316799A (en) * | 2014-10-30 | 2015-01-28 | 国家电网公司 | Metering merging unit checking device and method |
| CN104914405A (en) * | 2015-06-26 | 2015-09-16 | 国家电网公司 | Detection method and device |
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