CN107147430A - Power phase recognition methods based on carrier communication - Google Patents
Power phase recognition methods based on carrier communication Download PDFInfo
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- CN107147430A CN107147430A CN201710495477.5A CN201710495477A CN107147430A CN 107147430 A CN107147430 A CN 107147430A CN 201710495477 A CN201710495477 A CN 201710495477A CN 107147430 A CN107147430 A CN 107147430A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
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Abstract
The present invention relates to a kind of power phase recognition methods based on carrier communication, comprising：S1, based on industrial-frequency alternating current, the transmitting terminal of carrier communication is set in the phase line of power line known phase, in the zero-acrross ing moment of the phase phase of line, transmitting terminal by communication message of the transmission containing the phase line phase information from carrier communication to power line cycle, and calculate send communication message elapsed time；S2, based on industrial-frequency alternating current, the receiving terminal of carrier communication is set in the phase line of power line phase to be detected, the receiving terminal is received by carrier communication and reduces complete communication message, while recording at the time of communication message is finished receiving to the time interval between follow-up the last phase zero-acrross ing moment；The phase of S3, the receiving terminal phase line according to where being obtained the remainder values of calculating.The present invention, across the feature of being coupled, carries out phase identification, calculating is simple, conveniently deployment, identification high speed are accurate using arrowband power line carrier, PLC by way of message communication.
Description
Technical field
The present invention relates to a kind of phase recognition methods, a kind of power phase identification side based on carrier communication is specifically referred to
Method.
Background technology
Low-voltage carrier communication technology is a kind of important communication mode used in electric power Internet of Things.It is entered using power line
Row data transfer, has been widely used in power information acquisition system.
Needed as power marketing System information manages the raising of degree and the function of power information collecting device,
Need accurately to obtain the ammeter of the single-phase work in platform area and the phase information of collecting device.Due to can not be by the side of power failure
Formula carries out phase-detection, it is therefore necessary to realized using some new technological means.
The phase identification in platform area is carried out using carrier communication to be realized in the case of user power utilization is not influenceed.
But be due to carrier signal can become in platform or cable in across being coupled so that after a certain phase load information, other two-phases also may be used
To receive, that is, the problem of producing " train of signal phase ".Therefore, it is this to be sent out respectively in three-phase only in the case where coupling is very weak
The method sent out of phase information and then directly receive acquisition is just effective.
Based on above-mentioned, need simple proposition one kind calculating, convenient deployment badly at present, recognize that high speed is accurately based on carrier communication
Power phase recognition methods, to overcome present in prior art limitation and defect.
The content of the invention
It is an object of the invention to provide a kind of power phase recognition methods based on carrier communication, arrowband power carrier is utilized
Communication across the feature of being coupled, carry out phase identification by way of message communication, calculate simple, convenient deployment, identification at a high speed
Accurately.
To achieve the above object, the present invention provides a kind of power phase recognition methods based on carrier communication, comprising following
Step：
S1, based on industrial-frequency alternating current, the transmitting terminal of carrier communication is set in the phase line of power line known phase, in the phase
The zero-acrross ing moment of phase of line, transmitting terminal starts, and containing the phase phase of line to the transmission of power line cycle by carrier communication believes
The communication message of breath, while calculating the elapsed time T for sending communication messagem；
S2, based on industrial-frequency alternating current, the receiving terminal of carrier communication is set in the phase line of power line phase to be detected, and this connects
Receiving end is received by carrier communication and reduces complete communication message, while recording at the time of communication message is finished receiving to follow-up
Time interval T between the last phase zero-acrross ing momentz；
S3, the elapsed time T according to transmission communication messagem, communication message at the time of finish receiving to follow-up the last time
Phase zero-acrross ing moment between time interval TzAnd the cycle T of industrial-frequency alternating current, receiving terminal calculating remainder values Δ T, and root
The phase of phase line where being obtained according to remainder values Δ T.
Described transmitting terminal and receiving terminal is included：Processor module；Carrier communication module, respectively with power line and place
Manage the connection of device module；One direction zero passage detection module, is connected with power line and processor module respectively；Timing module, with place
Manage the connection of device module.
Described communication message includes following field：Synchronous head, identifies the beginning of effective communication message；Message length, be
Total amount of byte of the transmitting terminal address to end mark；Transmitting terminal address；Transmitting terminal phase information, takes A, B, C to represent three-phase phase respectively
Position；Message checking, carries out XOR by transmitting terminal address and transmitting terminal phase and obtains；End mark, identifies the knot of communication message
Beam.
Wherein, B phases phase falls behind A phase phasesC phases phase falls behind A phase phases
In described S1, specifically comprise the steps of：
S11, in the phase line of power line known phase set carrier communication transmitting terminal；
S12, the processor module of transmitting terminal start one direction zero passage detection module, and detection obtains the phase of follow-up the last time
Position zero-acrross ing moment t0；
S13, in phase zero-acrross ing moment t0, the processor module of transmitting terminal is by the communication report containing the phase line phase information
Each byte step-by-step of text is sent to power line by carrier communication module, is formed carrier data and is transmitted, and calculates transmission
The elapsed time T of communication messagem；
S14, in phase zero-acrross ing moment t0, the processor module of transmitting terminal starts timing module simultaneously, works as timing cycle
Reach TsAfterwards, return and perform S12, periodically send communication message.
In described S13, the elapsed time T of communication message is sentmFor：
Tm=L/V；
And Ts>Tm>T；
Wherein, L is total transmission data bits of communication message, and V is carrier communication speed.
In described S2, specifically comprise the steps of：
S21, power line need detect identification phase phase line on set carrier communication receiving terminal；
S22, receiving terminal carrier communication module all the time in a receive mode, detect and receive the company transmitted on power line
Continue effective carrier data, and the every carrier data received is sent to processor module；
S23, the processor module of receiving terminal before carrier communication module is received some carrier datas merge to be formed
Byte, it is identical with the synchronous head length of communication message, and matched with synchronous head；As unanimously, continued executing with S24；Such as differ
Cause, return and perform S22；
Whole carrier datas that carrier communication module is received are merged to form byte by S24, the processor module of receiving terminal,
Reduction obtains communication message；And XOR, such as result of calculation and report are carried out to transmitting terminal address therein and transmitting terminal phase
Text verification is consistent, continues executing with S25；Otherwise, return and perform S22；
S25, receiving terminal carrier communication module when receiving last data of communication message, processor module is opened
Dynamic timing module, t at the time of record communication message is finished receiving1, and start timing；
S26, receiving terminal carrier communication module when receiving last data of communication message, processor module is same
Shi Qidong one direction zero passage detection modules, detection obtains the phase zero-acrross ing moment t of follow-up the last time2；And obtain communication message
To the time interval T between follow-up the last phase zero-acrross ing moment at the time of finishing receivingz=t2-t1。
In described S3, specifically comprise the steps of：
S31, the processor module of receiving terminal calculate remainder values Δ T：
Δ T=(Tz+Tm) %T；
S32, phase judgement：
WhenOrWhen, the phase phase of phase line and phase line where transmitting terminal where judging receiving terminal
Together；
WhenWhen, 1 phase of phase line where phase wire delay transmitting terminal where judging receiving terminal；
WhenWhen, 2 phases of phase line where phase wire delay transmitting terminal where judging receiving terminal.
In summary, the power phase recognition methods provided by the present invention based on carrier communication, is carried using arrowband electric power
Wave communication across the feature of being coupled, phase identification is carried out by way of message communication, it is to avoid because disturb it is larger cause erroneous judgement
Problem, improves the speed and precision of phase identification；And this method critical region is wide, accuracy of timekeeping and calculating to hardware device
Rate request is low, can easily be deployed on existing power information acquisition terminal, implementation cost is low.
Brief description of the drawings
Fig. 1 for the present invention in the power phase recognition methods based on carrier communication flow chart；
Fig. 2 is the transmitting terminal and the structural representation of receiving terminal in the present invention；
Fig. 3 for the present invention in message structural representation；
The timing diagram that Fig. 4 recognizes for the power phase based on carrier communication in the present invention.
Embodiment
Below in conjunction with Fig. 1~Fig. 4, a preferred embodiment of the present invention is described in detail.
The frequency f of the industrial-frequency alternating current of China is that 50Hz, cycle T are 20ms, and the phase difference of its ABC three-phase is 120 degree,
On time, the time of the positive zero crossing of Three-phase alternating current signal (or reversely zero crossing) separately is T/3.Such as, A phases are being just
T/3 times, B phase positive going zeror crossings are spaced after to zero passage, then is spaced T/3 times, C phase positive going zeror crossings.In the process, if work
The power equipment of B phases or C phases be able to record that A phase positive going zeror crossing moment and place phase line following first zero-acrross ing moment it
Between interval, it is possible to identification where phase line phase.But the mistake of A phases will synchronously be obtained by being operated in the power equipment of B phases or C phases
Zero moment is extremely difficult, therefore the present invention carries out the method for data transmission reception to estimate this by using carrier communication
Moment.
As shown in figure 1, being the power phase recognition methods provided by the present invention based on carrier communication, following step is included
Suddenly：
S1, based on industrial-frequency alternating current, the transmitting terminal of carrier communication is set in the phase line of power line known phase, in the phase
The zero-acrross ing moment of phase of line, transmitting terminal starts, and containing the phase phase of line to the transmission of power line cycle by carrier communication believes
The communication message of breath, while calculating the elapsed time T for sending communication messagem；
S2, based on industrial-frequency alternating current, the receiving terminal of carrier communication is set in the phase line of power line phase to be detected, and this connects
Receiving end is received by carrier communication and reduces complete communication message, while recording at the time of communication message is finished receiving to follow-up
Time interval T between the last phase zero-acrross ing momentz；
S3, the elapsed time T according to transmission communication messagem, communication message at the time of finish receiving to follow-up the last time
Phase zero-acrross ing moment between time interval TzAnd the cycle T of industrial-frequency alternating current, receiving terminal calculating remainder values Δ T, and root
The phase of phase line where being obtained according to remainder values Δ T.
As shown in Fig. 2 described transmitting terminal and receiving terminal is included：Processor module；Carrier communication module, respectively with electricity
The line of force and processor module connection；One direction zero passage detection module, is connected with power line and processor module respectively；Timing
Module, is connected with processor module；Other functional circuit modules, are connected with processor module；System power supply is transmitting terminal and is connect
Receiving end provides working power.
As shown in figure 3, described communication message M includes following field：The synchronous head of 4 bytes, identifies effective communication message
Beginning；The message length of 1 byte, is total amount of byte of the transmitting terminal address to 4 fields of end mark；The transmitting terminal of 4 bytes
Address；The transmitting terminal phase information of 1 byte, takes A, B, C to represent three-phase phase respectively；The message checking of 1 byte, by transmitting terminal
Totally 5 bytes progress XORs are obtained for location and transmitting terminal phase；The end mark of 1 byte, is communicated with specific character mark and reported
The end of text.Wherein, each byte packet is containing 8 data.
Wherein, B phases phase falls behind A phase phasesC phases phase falls behind A phase phases
In described S1, specifically comprise the steps of：
S11, in the phase line of power line known phase set carrier communication transmitting terminal；
S12, the processor module of transmitting terminal start one direction zero passage detection module, the follow-up the last phase mistake of detection
Zero moment, one direction zero passage detection module is in t0When moment detects phase zero passage, zero cross signal is sent simultaneously to processor module
Stop detection；
S13, in phase zero-acrross ing moment t0, the processor module of transmitting terminal starts carrier communication module, will contain the phase
The communication message M of phase of line information each byte step-by-step is sent to power line by carrier communication module, forms carrier data
It is transmitted, and calculates the elapsed time T for sending communication message Mm；
S14, in phase zero-acrross ing moment t0, startup timing module starts timing to the processor module of transmitting terminal simultaneously, when
Timing cycle reaches TsAfterwards, timing module sends the signal for preparing to send communication message M again to processor module, and returns
Perform S12, the transmission communication message M of property performance period.
That is, in the present embodiment, transmitting terminal starts the positive going zeror crossing moment for phase at the time of message is sent, then
T must be spacedsAfter time, communication message M is sent again at the first positive going zeror crossing moment subsequently arrived, and follow according to this
Ring.
In described S13, communication message M elapsed time T is sentmFor：
Tm=L/V；
Wherein, L is communication message M total transmission data bits, and V is carrier communication speed；In the present embodiment, according to Fig. 2
Shown, each communication message M includes 12 bytes, therefore communication message M total transmission data bits L is 96；
Because carrier communication speed V is relatively low, therefore send communication message M elapsed time TmMuch larger than industrial-frequency alternating current
Cycle T, i.e.,：
Ts>Tm>T。
In described S2, specifically comprise the steps of：
S21, need in a certain geographical position of power line to detect the receiving terminal for setting carrier communication in the phase line of identification phase；
S22, receiving terminal carrier communication module all the time in a receive mode, detect and receive the company transmitted on power line
Continue effective carrier data, and the every carrier data received is sent to processor module；
Due to existing across being coupled, no matter whether receiving terminal is in isopen phase with transmitting terminal, can receive logical
Believe message M；
Preceding 32 carrier datas that carrier communication module is received are merged to form word by S23, the processor module of receiving terminal
Section, and matched with communication message M synchronous head；As unanimously, it is determined that currently received is communication message M, and continues to hold
Row S24；It is such as inconsistent, it is determined that currently received is interference signal data, without any processing, and execution S22 is returned, from
And can effective exclusive PCR, prevent erroneous judgement；
Whole carrier datas that carrier communication module is received are merged to form byte by S24, the processor module of receiving terminal,
Reduction obtains communication message M；And XOR is carried out to 5 bytes of transmitting terminal address therein and transmitting terminal phase, such as count
Calculate result consistent with message checking, it is believed that receive correct, continue executing with S25；Otherwise, return and perform S22；
S25, receiving terminal carrier communication module when receiving communication message M last data, processor module
Start timing module, t at the time of record communication message is finished receiving1, and start timing；
S26, receiving terminal carrier communication module when receiving communication message M last data, processor module
Start one direction zero passage detection module, the follow-up the last phase zero-acrross ing moment of detection, one direction zero passage detection module simultaneously
In t2When moment detects phase zero passage, send zero cross signal to processor module and stop detection；Processor module is from timing
Obtained at module at the time of communication message is finished receiving to the time interval T between follow-up the last phase zero-acrross ing momentz
=t2-t1。
In described S3, specifically comprise the steps of：
S31, the processor module of receiving terminal calculate remainder values Δ T：
Δ T=(Tz+Tm) %T；
S32, phase judgement：
WhenOrWhen, the phase phase of phase line and phase line where transmitting terminal where judging receiving terminal
Together；
WhenWhen, 1 phase of phase line where phase wire delay transmitting terminal where judging receiving terminal；
WhenWhen, 2 phases of phase line where phase wire delay transmitting terminal where judging receiving terminal.
In described S32, details are provided below for phase judgement：Ignore the interaction time and electric signal of intermodule
Transmission time, can be evaluated whether the communication message delivery time t of transmitting terminal0=t1-Tz-Tm, i.e. t1-t0=Tz+Tm, take the period
Tk=Tz+Tm。
Assuming that the phase phase of line of transmitting terminal is A phases：If the phase phase of line of receiving terminal is similarly A phases, then TkShould be
The integral multiple of industrial-frequency alternating current cycle T, i.e. Δ T=Tk%T ≈ 0；If the phase phase of line of receiving terminal is B phases or C phases, then Δ
T should be approximately respectivelyWithIt is just the time difference with A equidirectional zero passages.
Due to have ignored the interaction time of intermodule and the transmission time of electric signal, and in view of also there is timing mistake
Difference, therefore the differentiation point for adjudicating phase is extended to an interval range, i.e.,：WhenOrWhen, sentence
Determine receiving terminal and transmitting terminal same-phase；WhenWhen, judge receiving terminal delay 1 phase of transmitting terminal；WhenWhen, judge receiving terminal delay 2 phases of transmitting terminal.
As shown in figure 4, illustrating the phase recognition methods of the present invention by a specific embodiment.A phases are located at transmitting terminal
Send exemplified by communication message M, describe the correlation timing in whole process in detail.t0Moment transmitting terminal starts to send communication in A phases
Message M, t0It is also a positive going zeror crossing moment of A phases.By TmTime, communication message M is sent.The receiving terminal of A phases is being received
By T after to communication message M last datazATime reaches next zero-acrross ing moment t1A；The receiving terminal of B phases receive it is logical
Believe after last data of message M by TzBTime reaches next zero-acrross ing moment t1B；The receiving terminal of C phases is receiving communication report
By T after last data of literary MzCTime reaches next zero-acrross ing moment t1C。
By taking C phases as an example, it can obtain：TkC=TzC+Tm, it can be seen that T<Tm<TkC<Ts.Also, for A phases：Δ T=(TzA
+Tm) %T ≈ 0；For B phases：For C phases：
In summary, the power phase recognition methods provided by the present invention based on carrier communication, compared with prior art,
With advantages below and beneficial effect：
The present invention take full advantage of that arrowband power line carrier, PLC is present across this feature that is coupled, it is only necessary to a certain known
The phase line of phase sends the communication message containing the phase information, receiving terminal by receive the time difference of the communication message with
And the phase information of transmitting terminal is come the phase of phase line where recognizing it；Larger lead is disturbed when avoiding using physical layer signal identification
The problem of causing erroneous judgement, ensures being properly received for communication message by using simple communication protocol, so as to improve phase identification
Speed and precision.
Critical region of the present invention is wide, and the accuracy of timekeeping and calculating speed to hardware device require low, and accuracy of timekeeping reaches
0.1ms, processor speed reach 1MHz, effectively requirement of the reduction to hardware device.
The present invention can be easily deployed on existing power information acquisition terminal, and implementation cost is low, be not required to using special
Hardware device；Because acquisition terminal is simple in construction, transmitting terminal can be deployed in carrier wave concentrator or handheld device, receiving terminal
Can directly it be deployed on carrier acquisition device or the unidirectional intelligent electric meter of carrier wave.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of power phase recognition methods based on carrier communication, it is characterised in that comprise the steps of：
S1, based on industrial-frequency alternating current, the transmitting terminal of carrier communication is set in the phase line of power line known phase, in the phase line phase
The zero-acrross ing moment of position, transmitting terminal starts, and contains the phase line phase information to the transmission of power line cycle by carrier communication
Communication message, while calculating the elapsed time T for sending communication messagem；
S2, based on industrial-frequency alternating current, the receiving terminal of carrier communication, the receiving terminal are set in the phase line of power line phase to be detected
Received by carrier communication and reduce complete communication message, while recording at the time of communication message is finished receiving to follow-up nearest
The time interval T between phase zero-acrross ing moment oncez；
S3, the elapsed time T according to transmission communication messagem, communication message at the time of finish receiving to follow-up the last phase
Time interval T between zero-acrross ing momentzAnd the cycle T of industrial-frequency alternating current, receiving terminal calculating remainder values Δ T, and according to remainder
It is worth the phase of phase line where Δ T is obtained.
2. the power phase recognition methods as claimed in claim 1 based on carrier communication, it is characterised in that described transmitting terminal
Included with receiving terminal：Processor module；Carrier communication module, is connected with power line and processor module respectively；One direction
Zero passage detection module, is connected with power line and processor module respectively；Timing module, is connected with processor module.
3. the power phase recognition methods as claimed in claim 2 based on carrier communication, it is characterised in that described communication report
Text includes following field：
Synchronous head, identifies the beginning of effective communication message；
Message length, is total amount of byte of the transmitting terminal address to end mark；
Transmitting terminal address；
Transmitting terminal phase information, takes A, B, C to represent three-phase phase respectively；
Message checking, carries out XOR by transmitting terminal address and transmitting terminal phase and obtains；
End mark, identifies the end of communication message.
4. the power phase recognition methods as claimed in claim 3 based on carrier communication, it is characterised in that B phases phase falls behind A
Phase phaseC phases phase falls behind A phase phases
5. the power phase recognition methods as claimed in claim 4 based on carrier communication, it is characterised in that in described S1,
Specifically comprise the steps of：
S11, in the phase line of power line known phase set carrier communication transmitting terminal；
S12, the processor module of transmitting terminal start one direction zero passage detection module, and detection obtains the phase mistake of follow-up the last time
Zero moment t0；
S13, in phase zero-acrross ing moment t0, the processor module of transmitting terminal is by the communication message containing the phase line phase information
Each byte step-by-step is sent to power line by carrier communication module, is formed carrier data and is transmitted, and calculates transmission communication
The elapsed time T of messagem；
S14, in phase zero-acrross ing moment t0, the processor module of transmitting terminal starts timing module simultaneously, when timing cycle reaches Ts
Afterwards, return and perform S12, periodically send communication message.
6. the power phase recognition methods as claimed in claim 5 based on carrier communication, it is characterised in that in described S13,
Send the elapsed time T of communication messagemFor：
Tm=L/V；
And Ts>Tm>T；
Wherein, L is total transmission data bits of communication message, and V is carrier communication speed.
7. the power phase recognition methods as claimed in claim 5 based on carrier communication, it is characterised in that in described S2,
Specifically comprise the steps of：
S21, power line need detect identification phase phase line on set carrier communication receiving terminal；
S22, receiving terminal carrier communication module all the time in a receive mode, detecting and receiving transmitted on power line continuous has
The carrier data of effect, and the every carrier data received is sent to processor module；
S23, the processor module of receiving terminal before carrier communication module is received some carrier datas merge to form byte,
It is identical with the synchronous head length of communication message, and matched with synchronous head；As unanimously, continued executing with S24；It is such as inconsistent, return
Receipt row S22；
Whole carrier datas that carrier communication module is received are merged to form byte by S24, the processor module of receiving terminal, reduction
Obtain communication message；And XOR, such as result of calculation and message school are carried out to transmitting terminal address therein and transmitting terminal phase
Test consistent, continue executing with S25；Otherwise, return and perform S22；
S25, receiving terminal carrier communication module when receiving last data of communication message, processor module start meter
When module, record communication message t at the time of finish receiving1, and start timing；
S26, receiving terminal carrier communication module when receiving last data of communication message, processor module is opened simultaneously
Dynamic one direction zero passage detection module, detection obtains the phase zero-acrross ing moment t of follow-up the last time2；And obtain communication message reception
To the time interval T between follow-up the last phase zero-acrross ing moment at the time of completionz=t2-t1。
8. the power phase recognition methods as claimed in claim 7 based on carrier communication, it is characterised in that in described S3,
Specifically comprise the steps of：
S31, the processor module of receiving terminal calculate remainder values Δ T：
Δ T=(Tz+Tm) %T；
S32, phase judgement：
WhenOrWhen, phase line where judging receiving terminal is identical with the phase of phase line where transmitting terminal；
WhenWhen, 1 phase of phase line where phase wire delay transmitting terminal where judging receiving terminal；
WhenWhen, 2 phases of phase line where phase wire delay transmitting terminal where judging receiving terminal.
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| CN108345681A (en) * | 2018-02-28 | 2018-07-31 | 宁波三星医疗电气股份有限公司 | Ammeter type automatic identifying method based on link detecting and system |
| CN108872744A (en) * | 2018-06-26 | 2018-11-23 | 北京智芯微电子科技有限公司 | The recognition methods of platform area and system |
| CN112422155A (en) * | 2020-11-12 | 2021-02-26 | 上海蜂电网络科技有限公司 | Carrier wave cross-phase communication method and device |
| CN113466548A (en) * | 2021-08-06 | 2021-10-01 | 国网四川省电力公司营销服务中心 | Intelligent electric meter region identification method based on phasor measurement technology |
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