CN110444005A - Low Voltage Power Line Carrier Record System interference free performance test method and system - Google Patents
Low Voltage Power Line Carrier Record System interference free performance test method and system Download PDFInfo
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- CN110444005A CN110444005A CN201910731314.1A CN201910731314A CN110444005A CN 110444005 A CN110444005 A CN 110444005A CN 201910731314 A CN201910731314 A CN 201910731314A CN 110444005 A CN110444005 A CN 110444005A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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Abstract
It is a kind of Low Voltage Power Line Carrier Record System interference free performance test method and system, the former includes S1 acquisition noise signal and establishes noise signal database the present invention relates to interference free performance the field of test technology；S2 acquisition system main website sets continuous meter reading number, and determines the meter reading period；S3 recording noise signal plays a duration；The noise signal that S4 calculates required each type repeats playing number；S5 setting attenuator gives specific reduction compensation to each type of noise signal；S6 acquisition system main website issues continuous meter reading sign on, while noise signal is injected channel, waits to be tested be automatically performed；S7 calculates communication success rate and communication efficiency under noise-like signal interference；S8 changes the noise signal type of injection, returns to S6 and continues to test.The mode for the noise signal file database that scene is recorded is managed and is called by the present invention, is facilitated and is repeatedly tested, and the typing of later period newly-increased noise signal data is also conducive to.
Description
Technical field
The present invention relates to interference free performance the field of test technology, are a kind of Low Voltage Power Line Carrier Record System anti-interferences
It can test method and system.
Background technique
With the continuous expansion of distribution scale, power consumer quantity is continuously increased, and the mode of traditional artificial meter reading is not
It is able to satisfy the demand of the power consumer electricity consumption information collecting work of increasingly complicated intelligent distribution network, instead more intelligence
The remote auto meter reading system that can change and automate, and be wherein most widely used with Low Voltage Power Line Carrier Record System.
Mainly by acquisition system main website, concentrator and carrier electric energy meter, this is several for current Low Voltage Power Line Carrier Record System
Part forms, and wherein transmits data between concentrator and carrier electric energy meter mutually by the way of low-voltage powerline carrier communication,
The advantages of carrier communication is this kilowatt meter reading-out system, but carrier wave on low-voltage power line simultaneously can be carried out using existing low-voltage power line
The transmission of signal is also easy to be influenced by power grid time-varying characteristics and burst noise, to reduce the accuracy rate of communication.Therefore, it is
The acquisition for improving power consumer electricity consumption information is horizontal, and can be carried out research to the anti-interference of Low Voltage Power Line Carrier Record System is
Extremely necessary.Due to the diversity and complexity of noise signal in consumer networks, the influence suppression of noise signal is thoroughly eliminated
Or understand fully that the source of noise signal is all extremely difficult, and the influence that different noise signals generates kilowatt meter reading-out system may also
It is completely different, it is therefore desirable to carry out the acquisition and management of more systematicization, to noise signal to copy for test more fully hereinafter
The synthesis interference free performance of table system.
Summary of the invention
The present invention provides a kind of Low Voltage Power Line Carrier Record System interference free performance test method and systems, overcome
The deficiency of the above-mentioned prior art can effectively solve the communication under existing different noise jammings between concentrator and carrier electric energy meter
Success rate and the difference of communication efficiency are unpredictable, cause the communication accuracy rate of Low Voltage Power Line Carrier Record System is low to ask
Topic.
Technical solution of the present invention first is that being realized by following measures: a kind of Low Voltage Power Line Carrier Record System
Interference free performance test method, comprising the following steps:
S1: acquisition noise signal simultaneously establishes noise signal database；
S2: acquisition system main website sets continuous meter reading number, and determines to issue from meter reading instruction to acquisition system main website and obtain one
Time needed for secondary meter reading data, as a meter reading period；
S3:, which determining the noise signal type of injection channel, and records the noise signal plays a duration；
S4: acquisition system main website calculates continuously copying in setting according to the obtained meter reading period and each noise signal duration
The noise signal of each type needed under tabular order number repeats playing number；
S5: according to attenuation degree of the different types of noise signal under different acquisition communication channel parameter, attenuator pair is set
Each type of noise signal gives specific reduction compensation；
S6: acquisition system main website issues continuous meter reading sign on, while noise signal is injected channel, waits to be tested automatic complete
At；
S7: the multiple meter reading of the comprehensive concentrator transmission of acquisition system main website as a result, calculating under noise-like signal interference
Communicate success rate and communication efficiency；
S8: changing the noise signal type of injection, returns to S6 and continues to test, respectively to the multiple of different noise signal types
Test result is assessed, and obtains the test result of the synthesis interference free performance of Low Voltage Power Line Carrier Record System.
Here is the further optimization and/or improvements to invention technology described above scheme:
It is above-mentioned in S1, establishing noise signal database includes following procedure:
S11, the acquisition of noise signal: noise signal in different time periods and various household electrical appliance in the practical electricity consumption region of acquisition
Generated noise signal acquires at least ten kinds of noise signal types, is recorded to noise signal and form wave file sample
This, to form the diversified noise signal database of spectrum signature；
S12 is handled and is analyzed to collected each noise signal waveforms sample, filters out wherein ten kinds of representative frequencies
The noise signal of spectrum signature generates the noise waveform database after screening as the noise source of test.
Technical solution of the present invention second is that being realized by following measures: a kind of Low Voltage Power Line Carrier Record System
Interference free performance test macro includes acquisition system main website, concentrator, industrial personal computer, noise playback equipment, power amplifier, coupling
Device, carrier electric energy meter, simulation table becomes and attenuator, mode communication link by wireless communication between acquisition system main website and concentrator
It connects, with for sending meter reading instruction to concentrator, analog acquisition system main website is connected by communication interface and industrial personal computer wire communication
Connect, industrial personal computer is connect with noise playback equipment, analog acquisition system main website to industrial personal computer transmitted noise signal play instruction,
Control process control noise playback equipment in industrial personal computer plays noise signal, noise playback equipment, power amplifier, coupling
Device, carrier electric energy meter are sequentially electrically connected, and carrier electric energy meter is connect with attenuator, and attenuator gives each type of noise signal
Specific reduction compensation, simulation table deflecting carrier electric energy meter send simulation electric signal, and carrier electric energy meter is carried by low-voltage power
The electricity consumption that wave communication becomes to the simulation table that concentrator sends metering.
Beneficial effects of the present invention are as follows:
1, the mode for the noise signal file database that scene is recorded is managed and is called by the present invention, is facilitated and is repeatedly surveyed
Examination is also conducive to the typing of later period newly-increased noise signal data；
2, the broadcasting of noise signal of the present invention carries out PLC technology, it can be achieved that the noise signal of various ways is pre- using industrial personal computer
Processing and the way of output control, while industrial personal computer control program interface on can real-time display output signal time-domain diagram
And frequency spectrum profile, the basic characteristics of the noise signal for being exported have intuitive reaction；
3, it is tested repeatedly by injecting a plurality of types of noise signals, the test result obtained is carried out than single noise signal
Testing the result obtained more has referential, and can more reflect the anti-interference energy of the synthesis of Low Voltage Power Line Carrier Record System
Power；Realize on the basis of establishing noise signal database to the systematized management of the noise signal with different spectral feature and
Facilitation is called, for testing communication success rate and communication effect under different noise jammings between concentrator and carrier electric energy meter
The difference of rate, so that the test result of the synthesis interference free performance of Low Voltage Power Line Carrier Record System is obtained, further to change
The communication effect of kind Low Voltage Power Line Carrier Record System provides the foundation of reference.
Detailed description of the invention
Attached drawing 1 is the method flow diagram of the embodiment of the present invention 1.
Attached drawing 2 is the flow chart for establishing noise signal database of the embodiment of the present invention 1.
Attached drawing 3 is the system structure diagram of the embodiment of the present invention 2.
Specific embodiment
The present invention is not limited by the following examples, can determine according to the technique and scheme of the present invention with actual conditions specific
Embodiment.
Below with reference to examples and drawings, the invention will be further described:
Embodiment 1: as shown in Fig. 1, a kind of Low Voltage Power Line Carrier Record System interference free performance test method, including with
Lower step:
S1: acquisition noise signal simultaneously establishes noise signal database；
S2: acquisition system main website sets continuous meter reading number, and determines to issue from meter reading instruction to acquisition system main website and obtain one
Time needed for secondary meter reading data, as a meter reading period；
S3:, which determining the noise signal type of injection channel, and records the noise signal plays a duration；
S4: acquisition system main website calculates continuously copying in setting according to the obtained meter reading period and each noise signal duration
The noise signal of each type needed under tabular order number repeats playing number；
S5: according to attenuation degree of the different types of noise signal under different acquisition communication channel parameter, attenuator pair is set
Each type of noise signal gives specific reduction compensation；
S6: acquisition system main website issues continuous meter reading sign on, while noise signal is injected channel, waits to be tested automatic complete
At；
S7: the multiple meter reading of the comprehensive concentrator transmission of acquisition system main website as a result, calculating under noise-like signal interference
Communicate success rate and communication efficiency；
S8: changing the noise signal type of injection, returns to S6 and continues to test, respectively to the multiple of different noise signal types
Test result is assessed, and obtains the test result of the synthesis interference free performance of Low Voltage Power Line Carrier Record System.
Into S5 the method for operation and parameter of acquisition system main website and noise playback equipment is arranged, so that whole in above-mentioned S2
The interference of noise signal always exists during a meter reading, and utmostly restores true noise jamming, is actually copied with simulation
The influence that noise signal generates the performance parameters such as the communication success rate of kilowatt meter reading-out system and communication efficiency under table environment is arranged to collection
The meter reading number of middle device is at least ten times.
In above-mentioned S6, acquisition system main website will issue continuous meter reading instruction, and first starting meter reading instruction and noise are broadcast
It puts instruction to be simultaneously emitted by, acquisition system main website issues next meter reading instruction immediately after receiving meter reading data, and noise is broadcast
It puts equipment and repeats playing noise signal by the broadcasting time of setting.
Communication success rate and communication efficiency are calculated in above-mentioned S7, are believed by acquisition system main website according to the noise of current type
At least ten times meter reading results are calculated automatically under the influence of number, record when time test test result, so as to other classes
Test result under the influence of the noise signal of type compares and analyzes.
Here is the further optimization and/or improvements to invention technology described above scheme:
As shown in Fig. 2, in S1, establishing noise signal database includes following procedure:
S11, the acquisition of noise signal: noise signal in different time periods and various household electrical appliance in the practical electricity consumption region of acquisition
Generated noise signal acquires at least ten kinds of noise signal types, is recorded to noise signal and form wave file sample
This, to form the diversified noise signal database of spectrum signature；
S12 is handled and is analyzed to collected each noise signal waveforms sample, filters out wherein ten kinds of representative frequencies
The noise signal of spectrum signature generates the noise waveform database after screening as the noise source of test.
The Noise Acquisition equipment that the present invention uses can be mainly made of voltage probe, passive high three-way filter and attenuator,
High frequency voltage noise signal can be acquired out of the electricity consumption cell of remote low pressure power line carrier meter reading system to be put into distribution box,
The wave file that digital oscilloscope records HF noise signal and generates CSV format can be used.Due to digital oscilloscope
The data points disposably saved are limited, therefore save ten sections of noise signal waveforms respectively within ten different periods, with
Electric peak period suitably increases acquisition waveform quantity.For some household loads for having seasonal investment feature, to acquire comprising it
Acquisition time span needed for the noise signal of feature is very long, therefore for such electrical equipment, may be selected wherein stronger
Noise-producing source records the noise signal waveforms under its ten different loading status as the object individually acquired respectively.
In S12, collected noise signal waveforms sample is handled and analyzed, is the waveform of CSV format first
The processing of file itself contains the header file data that parameter is recorded about oscillograph, Cong Zhongke in the wave file of CSV format
To determine the useful informations such as sampling interval and sampling number, so that it is determined that recorded waveform plays a duration, note
These header file data are deleted after recording lower useful information, facilitates and carries out data base administration and subsequent control routine call.It is right
In specific noise playback equipment, generally there is the data points limitation of waveform customization, such as UTG2025A signal generator,
The points of its customized random waveform of maximum supported are 8000 points, in this case, should be in database generation phase to wave
Graphic data is intercepted, and the data for the maximum number of points that noise playback equipment can be supported are retained.Secondly, to noise signal waveforms sample
This carries out display and spectrum analysis, using software realizations such as Matlab or Labview, the present embodiment using Labview into
Row test establishes waveform sample data library connection: the odbc data source management program under starting windows by ODBC mode,
The Wave data source for adding mdb format indexes out noise signal wave after establishing the connection of waveform sample data library in labview
The sub-table data of shape carry out waveform to noise signal in labview and show and spectrum analysis that filtering out wherein has for ten kinds
The noise signal of representative spectrum signature ultimately produces the noise waveform database after screening as the noise source of test.
Embodiment 2: as shown in Fig. 3, which includes adopting
Collecting system main website, concentrator, industrial personal computer, noise playback equipment, power amplifier, coupler, carrier electric energy meter, simulation table become and
Attenuator, mode communicates to connect by wireless communication between acquisition system main website and concentrator, for copying to concentrator transmission
Table instruction, analog acquisition system main website are connect by communication interface with industrial personal computer wire communication, industrial personal computer and noise playback equipment
Connection, control process control of the analog acquisition system main website to industrial personal computer transmitted noise signal play instruction, in industrial personal computer
Noise playback equipment plays noise signal, and noise playback equipment, power amplifier, coupler, carrier electric energy meter are sequentially electrically connected,
Carrier electric energy meter is connect with attenuator, and attenuator gives specific reduction compensation to each type of noise signal, and simulation table becomes
Simulation electric signal is sent to carrier electric energy meter, carrier electric energy meter sends metering to concentrator by low voltage electric power carrier communication
The electricity consumption that simulation table becomes.
It can be communicated by cable LAN between industrial personal computer of the invention and acquisition system main website, acquisition system main website
Telecommunication can be realized by GPRS communication between concentrator, concentrator and carrier electric energy meter pass through low-voltage power
The mode of line carrier communication carries out data exchange.
When actual test, acquisition system main website sends continuous meter reading instruction to concentrator, while transmitted noise signal plays
Industrial personal computer is instructed, concentrator and noise playback equipment are started to work at this time, and concentrator acquires the electricity consumption of carrier electric energy meter metering
Data, noise playback equipment issue noise signal.Acquisition system main website will issue continuous meter reading instruction, and first starting meter reading refers to
It enabling and noise play instruction is simultaneously emitted by, acquisition system issues next meter reading instruction immediately after receiving meter reading data,
Noise playback equipment repeats playing noise signal by the broadcasting time of setting.
Due between the data communication channel and acquisition system main website and industrial personal computer between acquisition system main website and concentrator
Data communication channel difference, meter reading instruction reach concentrator time and noise play instruction reach industrial personal computer time meeting
It is different, at the same on concentrator and industrial personal computer preset program operation speed speed, will also result in concentrator and noise and play
It is asynchronous when equipment is started to work, but above-mentioned temporal deviation is almost the same deviation in multiple test, and only shadow
It rings previous to meter reading twice as a result, being influenced on the comparative analysis of global test result little.But to avoid test process from going out
Existing error, the noise signal that the present invention is set, which repeats playing number, should meet following conditions: get in acquisition system main website
After last time meter reading data, the broadcasting of noise signal still stops in lasting progress and just after certain delay, that is, noise
Signal, which continues play time, should be greater than total used time of continuous meter reading process.The broadcasting of noise signal may be programmed using industrial personal computer
Noise signal pretreatment and the control of the way of output, it can be achieved that various ways are controlled, while in the control program of industrial personal computer
On interface can real-time display output signal time-domain diagram and frequency spectrum profile, the basic characteristics of the noise signal for being exported have
Intuitive reaction.
Noise playback equipment of the invention is controlled using software programming, and noise playback equipment, which can be used, provides programming Control drive
Dynamic signal generator, can also be used the High Speed Analog amount output card of PCI interface, and the present embodiment uses and grinds magnificent PCI-1721 type
Number 12 4 channel High Speed Analog output cards as noise playback equipment.Grinding magnificent PCI-1721 itself provides complete function
Programming Control driving and programming example, carry out quadratic programming on the basis of Labview programs example, and the programming that can effectively shorten is all
Phase, to realize the customized output control for grinding magnificent PCI-1721.Step S1 to S5 is the preliminary preparation before test starts,
It is acquired the setting of system main website and noise playback equipment later, and carries out continuous meter reading sign on and noise signal broadcasting
The sending of instruction.Before carrying out equipment setting, acquisition system main website send ten meter reading orders tested, it is not necessary to continuously into
Row, records the sending time of each meter reading order and the time of return of meter reading data, to obtain needed for ten single meter readings
Its average value is determined as the single meter reading period by the data of duration, is set continuous meter reading number later as ten times, is calculated ten times and copy
The total duration of table process, it is assumed that be 10s.Determine that noise signal plays a duration by S3, it is assumed that be 1s, then noise
Signal, which repeats playing number, should at least be set as 11 times, so that after acquisition system main website gets last time meter reading data,
The broadcasting of noise signal still stops in lasting progress and just after being delayed 1s.Wave is set in the control program that labview writes
Graphic data library index and noise signal gain factor to the noise signal type injected needed for determining, while compensating acquisition letter
The decaying that noise signal is generated during number.After setting the above parameter, acquisition system main website is simultaneously emitted by continuous meter reading and opens
Begin instruction and noise signal play instruction, waits when time test is automatically performed, by acquisition system main website according to ten meter reading results
Communication success rate and communication efficiency when time test is calculated.The noise signal type that injection is changed in S8, adjusts simultaneously
Test is re-started after remaining suitable parameter, comprehensive analysis is carried out to the result repeatedly tested later, to obtain the low tension
The assessment result of the comprehensive interference free performance of line of force carrier meter reading system.
The above technical characteristic constitutes highly preferred embodiment of the present invention, with stronger adaptability and best implementation effect
Fruit can increase and decrease non-essential technical characteristic, according to actual needs to meet the needs of different situations.
Claims (3)
1. a kind of Low Voltage Power Line Carrier Record System interference free performance test method, it is characterised in that: the following steps are included:
S1: acquisition noise signal simultaneously establishes noise signal database；
S2: acquisition system main website sets continuous meter reading number, and determines to issue from meter reading instruction to acquisition system main website and obtain one
Time needed for secondary meter reading data, as a meter reading period；
S3:, which determining the noise signal type of injection channel, and records the noise signal plays a duration；
S4: acquisition system main website calculates continuously copying in setting according to the obtained meter reading period and each noise signal duration
The noise signal of each type needed under tabular order number repeats playing number；
S5: according to attenuation degree of the different types of noise signal under different acquisition communication channel parameter, attenuator pair is set
Each type of noise signal gives specific reduction compensation；
S6: acquisition system main website issues continuous meter reading sign on, while noise signal is injected channel, waits to be tested automatic complete
At；
S7: the multiple meter reading of the comprehensive concentrator transmission of acquisition system main website as a result, calculating under noise-like signal interference
Communicate success rate and communication efficiency；
S8: changing the noise signal type of injection, returns to S6 and continues to test, respectively to the multiple of different noise signal types
Test result is assessed, and obtains the test result of the synthesis interference free performance of Low Voltage Power Line Carrier Record System.
2. Low Voltage Power Line Carrier Record System interference free performance test method according to claim 1, it is characterised in that:
In S1, establishing noise signal database includes following procedure:
S11, the acquisition of noise signal: noise signal in different time periods and various household electrical appliance in the practical electricity consumption region of acquisition
Generated noise signal acquires at least ten kinds of noise signal types, is recorded to noise signal and form wave file sample
This, to form the diversified noise signal database of spectrum signature；
S12 is handled and is analyzed to collected each noise signal waveforms sample, filters out wherein ten kinds of representative frequencies
The noise signal of spectrum signature generates the noise waveform database after screening as the noise source of test.
3. a kind of Low Voltage Power Line Carrier Record System interference free performance test macro, it is characterised in that: including acquisition system master
Stand, concentrator, industrial personal computer, noise playback equipment, power amplifier, coupler, carrier electric energy meter, simulation table become and attenuator,
Mode communicates to connect by wireless communication between acquisition system main website and concentrator, to be used to send meter reading instruction to concentrator,
Analog acquisition system main website is connect by communication interface with industrial personal computer wire communication, and industrial personal computer is connect with noise playback equipment, institute
Analog acquisition system main website is stated to industrial personal computer transmitted noise signal play instruction, the control process control noise in industrial personal computer plays
Device plays noise signal, noise playback equipment, power amplifier, coupler, carrier electric energy meter are sequentially electrically connected, carrier electric power
Table is connect with attenuator, and attenuator gives specific reduction compensation, simulation table deflecting carrier wave electricity to each type of noise signal
Energy table sends simulation electric signal, and carrier electric energy meter sends the simulation table change of metering by low voltage electric power carrier communication to concentrator
Electricity consumption.
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Cited By (7)
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| CN111030730A (en) * | 2019-12-05 | 2020-04-17 | 国网天津市电力公司电力科学研究院 | Low-voltage power line noise recording and injecting system |
| CN111147324A (en) * | 2019-12-17 | 2020-05-12 | 国网北京市电力公司 | Multi-dimensional integrated detection and evaluation system |
| CN111585663A (en) * | 2020-04-20 | 2020-08-25 | 杭州华立电力系统工程有限公司 | Method for reproducing low-voltage power line carrier communication characteristic interference noise |
| CN111600633A (en) * | 2020-05-26 | 2020-08-28 | 国网上海市电力公司 | Low pressure collection is copied testing arrangement based on HPLC |
| CN112885071A (en) * | 2021-01-19 | 2021-06-01 | 中国电力科学研究院有限公司 | Interference simulation device and method for electricity consumption information acquisition channel |
| CN113472394A (en) * | 2021-07-21 | 2021-10-01 | 国网信通亿力科技有限责任公司 | Bypass data monitoring system based on power line carrier |
| CN113825158A (en) * | 2021-08-31 | 2021-12-21 | 国网江苏省电力有限公司泰州供电分公司 | Power grid wireless communication debugging system |
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