CN110266348A - A kind of platform area recognition methods based on OFDM carrier signal - Google Patents
A kind of platform area recognition methods based on OFDM carrier signal Download PDFInfo
- Publication number
- CN110266348A CN110266348A CN201910639355.8A CN201910639355A CN110266348A CN 110266348 A CN110266348 A CN 110266348A CN 201910639355 A CN201910639355 A CN 201910639355A CN 110266348 A CN110266348 A CN 110266348A
- Authority
- CN
- China
- Prior art keywords
- signal
- sta
- cco
- platform area
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000004891 communication Methods 0.000 claims abstract description 126
- 230000008569 process Effects 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 33
- 238000010304 firing Methods 0.000 claims description 8
- 238000013095 identification testing Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 230000006855 networking Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5466—Systems for power line communications using three phases conductors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5479—Systems for power line communications using repeaters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
A kind of platform area recognition methods based on OFDM carrier signal of the present invention, including two processes, are to confirm from secondary to once having the OFDM subcarrier frequency point of decaying as platform area identification signal first, then carry out the identification of platform area with the ofdm signal of selected subcarrier again；Pass through the carrier communication of distribution transformer secondary side and primary side; confirm the frequency form of platform area identification signal; and the carrier communication module of primary side issues the signal for blocking secondary side stage area identification signal to transmit in primary side; so that it is guaranteed that the platform area identification signal based on power line transmission cannot travel to other areas, so that the effectively identification family Tai Qu becomes relationship.
Description
Technical field
The present invention relates to the technical field of power line carrier communication more particularly to a kind of platform areas based on OFDM carrier signal
Recognition methods.
Background technique
The correct identification of the family Tai Qu change relationship is the business demand of current low-voltage distribution, and power consumption management department needs core according to this
Files on each of customers is looked into, to ensure that power supply user's map file relationship under the area a Ge Tai transformer is accurate, ensures errorless management number
According to.Become relationship based on the correct family Tai Qu, power consumption management department could correctly calculate platform area user's total electricity consumption, judge platform area line
Loss rate, to effectively track and analyze the method for reducing line loss per unit.The family Tai Qu becomes relationship combination phase relation, it can also be used to electricity consumption
Load balance reduces laod unbalance loss.
The low-voltage platform area identification equipment to come into operation currently on the market, or it is based on characteristic parameter, or be based on FSK carrier wave or base
In pulse-current technique, these method testing principles are unintelligible or there are principle defect, can not effectively identify that the family Tai Qu becomes and close
System.
Summary of the invention
Equipment is identified for the low-voltage platform area come into operation currently on the market, can not effectively identify that the family Tai Qu becomes relationship, this
Invention provides the platform area recognition methods based on OFDM carrier signal.
A kind of platform area recognition methods based on OFDM carrier signal, distribution transformer secondary side output end are equipped with outfit and carry
The concentrator of wave module CCO, under secondary side stage area electric energy meter equipped with carrier module STA, and can by CCO group-net communication,
In, comprising the following steps:
The first step, primary side high pressure Three Phase Carrier Based communication module STA-P3H is by multicarrier communication signal according to carrier networking
Link layer protocol is accessed using low pressure concentrator carrier module CCO as the carrier meter reading network of network center, and multicarrier communication signal is
Group-net communication signal of the carrier meter reading network based on power line；
Second step, CCO notify high pressure Three Phase Carrier Based communication module STA-P3H i.e. by firing platform area by multicarrier communication signal
It identifies frequency band test process, and notifies STA-P3H for the test signal sending instant of platform area identification；
Described area identification frequency band test process includes: CCO sending station area identification frequency band test signal to STA-P3H,
STA-P3H is measured；STA-P3H reports measurement result to CCO；
" platform area identifies frequency band test process " specifically: low during first selection subcarrier frequency point
Concentrator carrier module CCO is pressed first to issue the platform area identification test letter of whole subcarriers in 10~500kHz in the form of ofdm signal
Number, it is received by high pressure Three Phase Carrier Based communication module STA-P3H, STA-P3H feeds back each sub-carrier signal strengths received
To CCO；CCO selects to decay biggish subcarrier frequency point as the final selected subcarrier frequency of platform area identification transmission signal
Point；
Third step, CCO notifies STA-P3H that firing platform area is identified process by multicarrier communication signal, and notifies STA-
Selected area's identification signal of P3H is at the time of the signal amplitude value and sending station area identification signal of each subcarrier；
Described area identifies process, comprising: CCO sends test signal, and STA-P3H sends disabling signal；
The platform area identifies process specifically: CCO loads the identification information of oneself based on selected subcarrier, carries out platform area
Identification；While CCO sends identification signal, STA-P3H issues the interference signal for being directed to these subcarrier frequency points, and platform area is blocked to know
For level signal in the propagation of primary side, same this area identification signal also just can not be by the low -voltage Watt -hour meter carrier module in other areas
STA identification；And be located in secondary side this TV station area, the STA that can receive this area identification signal marks oneself platform zone state, most
The state of each STA is read by CCO eventually, arranges platform area recognition result；
4th step, CCO start the collection to platform zone state, and STA module passes through multicarrier communication signal for the platform area shape of oneself
State is reported to CCO, and platform zone state includes whether STA detects the mark of platform area identification signal, detected area's identification information
With place phase flag, CCO integrally counts and records the number for the STA module for being subordinate to this TV station area and the STA module in non-this TV station area
Number and its corresponding electrical energy meter electricity energy table address number and power consumer number.
The platform area recognition methods based on OFDM carrier signal, wherein the distribution transformer primary side passes through
Position after voltage transformer and current transformer is equipped with three-phase electric energy meter, and primary side three-phase is fitted on three-phase electric energy meter
Carrier communication module STA-P3H.
The platform area recognition methods based on OFDM carrier signal, wherein, can be by being based in the first step
The STA module that multicarrier communication signal application networks, CCO judge that these modules and its corresponding electric energy meter belong to platform where this CCO
Area；These modules and its corresponding electric energy meter cannot be judged by the STA module that networks based on multicarrier communication signal application, CCO
Platform area where being not belonging to this CCO.
The platform area recognition methods based on OFDM carrier signal, wherein the error correction school of the platform area identification signal
Coding is tested using convolutional encoding.
The platform area recognition methods based on OFDM carrier signal, wherein the multicarrier communication signal is using single-phase
The mode of load, multicarrier communication signal single-phase load respectively using A, B, C are each；Platform area identification test signal, platform area identification letter
Number and platform area identification disabling signal loaded simultaneously using A, B, C three-phase.
The platform area recognition methods based on OFDM carrier signal, wherein, can in this TV station area in the third step
Receive CCO sending platform area identification signal and parse put into effect area's identification information STA module, the STA module by oneself
Platform zone state while be reported to CCO by multicarrier communication signal, the platform area identification signal which will receive simultaneously
Reporting signal strength to CCO；So that further relay forwarding of the CCO to platform area identification signal is managed and controls；
CCO selection signal intensity is less than set threshold value, network level is greater than the carrier wave STA module of threshold value as the identification of platform area
Relay STA module；
CCO notifies STA-P3H and other electric energy meter carrier wave STA modules by multicarrier communication signal, and content of announcement includes: institute
The identification list of the area Shu Tai identification relaying STA module and its load data of sending instant and platform area identification signal, platform area knows
The load data of level signal includes platform area identification information, relay forwarding series.
The platform area recognition methods based on OFDM carrier signal, wherein in the third step, CCO is selected
Relaying STA module is secondary side Three Phase Carrier Based communication module.
The platform area recognition methods based on OFDM carrier signal, wherein in the third step, CCO is selected
Relaying STA module is 3 secondary side single-phase carrier communication modules, first, the in 3 secondary side single-phase carrier communication modules
Two, third secondary side single-phase carrier communication module respectively corresponds A phase, B phase or C phase in three-phase；STA and CCO is based on carrier wave energy
Enough group-net communications, this 3 secondary side single-phase carrier communication modules carry out secondary in platform area identification signal under the control of CCO
It send.
The platform area recognition methods based on OFDM carrier signal, wherein the primary side Three Phase Carrier Based communicates mould
Block STA-P3H module carrier signal, which accesses circuit, has impedance matching circuit, which identifies test letter in platform area
Number frequency band in have Low ESR frequency range, and the frequency band of multicarrier communication signal have high impedance.
Platform area recognition methods based on OFDM carrier signal of the invention passes through distribution transformer secondary side and primary side
Carrier communication confirms the frequency form of platform area identification signal, and the carrier communication module of primary side issues and blocks secondary side stage
The signal that area's identification signal is transmitted in primary side, so that it is guaranteed that the platform area identification signal based on power line transmission cannot travel to it
The area Ta Tai, so that the effectively identification family Tai Qu becomes relationship.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the platform area recognition methods the present invention is based on OFDM carrier signal；
Fig. 2 is the flow chart of the platform area recognition methods the present invention is based on OFDM carrier signal；
Fig. 3 is that the present invention is based on the platform area recognition methods middle impedance match circuit schematic diagrams of OFDM carrier signal；
Fig. 4 is bandwidth carrier communication network topology figure.
Specific embodiment
The present invention provides a kind of platform area recognition methods based on OFDM carrier signal, including two processes, want first
Confirmation is from secondary to once having the OFDM subcarrier frequency point of decaying as platform area identification signal, then again with selected subcarrier
Ofdm signal carries out the identification of platform area.During first selection subcarrier frequency point, low pressure concentrator carrier module CCO first with
Ofdm signal form issues the platform area identification test signal of whole subcarriers in 10~500kHz, communicates mould by high pressure Three Phase Carrier Based
Block STA-P3H is received.The each sub-carrier signal strengths received are fed back to CCO by STA-P3H.CCO selection decaying is biggish
Subcarrier frequency point sends the selected subcarrier frequency point of signal as final platform area identification.Then during second, CCO
The identification information of oneself is loaded based on selected subcarrier, carries out the identification of platform area.While CCO sends identification signal, STA-P3H hair
It is directed to the interference signal of these subcarrier frequency points out, blocks platform area identification signal in the propagation of primary side, same this area identification
Signal also can not just be identified by the STA (low -voltage Watt -hour meter carrier module) in other areas.And be located at secondary side this TV station area in, can
The STA for receiving this area identification signal marks the platform zone state of oneself, and the state of each STA is finally read by CCO, arranges platform area
Recognition result.
Specific technical solution is as described below:
A kind of platform area recognition methods based on OFDM carrier signal, distribution transformer secondary side output end are equipped with outfit and carry
The concentrator of wave module CCO, under secondary side stage area electric energy meter equipped with carrier module STA, and can by CCO group-net communication,
It is characterized in that, comprising the following steps:
The first step, primary side high pressure Three Phase Carrier Based communication module STA-P3H is by multicarrier communication signal according to carrier networking
Link layer protocol is accessed using low pressure concentrator carrier module CCO as the carrier meter reading network of network center, and multicarrier communication signal is
Group-net communication signal of the carrier meter reading network based on power line；
Second step, CCO notify high pressure Three Phase Carrier Based communication module STA-P3H i.e. by firing platform area by multicarrier communication signal
It identifies frequency band test process, and notifies STA-P3H for the test signal sending instant of platform area identification；
Described area identification frequency band test process includes: CCO sending station area identification frequency band test signal to STA-P3H,
STA-P3H is measured；STA-P3H reports measurement result to CCO；
" platform area identifies frequency band test process " specifically: low during first selection subcarrier frequency point
Concentrator carrier module CCO is pressed first to issue the platform area identification test letter of whole subcarriers in 10~500kHz in the form of ofdm signal
Number, it is received by high pressure Three Phase Carrier Based communication module STA-P3H, STA-P3H feeds back each sub-carrier signal strengths received
To CCO.CCO selects to decay biggish subcarrier frequency point as the final selected subcarrier frequency of platform area identification transmission signal
Point；
Third step, CCO notifies STA-P3H that firing platform area is identified process by multicarrier communication signal, and notifies STA-
Selected area's identification signal of P3H is at the time of the signal amplitude value and sending station area identification signal of each subcarrier；
Described area identifies process, comprising: CCO sends test signal, and STA-P3H sends disabling signal；
The platform area identifies process specifically: CCO loads the identification information of oneself based on selected subcarrier, carries out platform area
Identification.While CCO sends identification signal, STA-P3H issues the interference signal for being directed to these subcarrier frequency points, and platform area is blocked to know
For level signal in the propagation of primary side, same this area identification signal also just can not be by the low -voltage Watt -hour meter carrier module in other areas
STA identification；And be located in secondary side this TV station area, the STA that can receive this area identification signal marks oneself platform zone state, most
The state of each STA is read by CCO eventually, arranges platform area recognition result；
4th step, CCO start the collection to platform zone state, and STA module passes through multicarrier communication signal for the platform area shape of oneself
State is reported to CCO, and platform zone state includes whether STA detects the mark of platform area identification signal, detected area's identification information
With place phase flag, CCO integrally counts and records the number for the STA module for being subordinate to this TV station area and the STA module in non-this TV station area
Number and its corresponding electrical energy meter electricity energy table address number and power consumer number.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that the distribution transformer is primary
Side is equipped with three-phase electric energy meter by the position after voltage transformer and current transformer, is equipped with once on three-phase electric energy meter
Side Three Phase Carrier Based communication module STA-P3H.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that in the first step, Neng Goutong
The STA module to network based on multicarrier communication signal application is crossed, CCO judges that these modules and its corresponding electric energy meter belong to this CCO
Place platform area；These modules and its corresponding cannot be judged by the STA module that networks based on multicarrier communication signal application, CCO
Platform area where electric energy meter is not belonging to this CCO.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that the platform area identification signal
Error checking and correction coding uses convolutional encoding.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that the multicarrier communication signal is adopted
With the mode of single-phase load, multicarrier communication signal single-phase loads respectively using A, B, C are each；The identification of platform area test signal, Tai Qu
Identification signal and platform area identification disabling signal are loaded simultaneously using A, B, C three-phase.
The platform area recognition methods based on OFDM carrier signal, it is characterised in that: in the third step, this TV station area
The interior platform area identification signal that can receive CCO sending simultaneously parses the STA module for putting into effect area's identification information, the STA module
While the platform zone state of oneself is reported to CCO by multicarrier communication signal, which simultaneously knows the platform area received
The reporting signal strength of level signal is to CCO；So that further relay forwarding of the CCO to platform area identification signal is managed and controls
System；
CCO selection signal intensity is less than set threshold value, network level is greater than the carrier wave STA module of threshold value as the identification of platform area
Relay STA module；
CCO notifies STA-P3H and other electric energy meter carrier wave STA modules by multicarrier communication signal, and content of announcement includes: institute
The identification list of the area Shu Tai identification relaying STA module and its load data of sending instant and platform area identification signal, platform area knows
The load data of level signal includes platform area identification information, relay forwarding series.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that in the third step, CCO institute
The relaying STA module selected is secondary side Three Phase Carrier Based communication module.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that in the third step, CCO institute
The relaying STA module selected is 3 secondary side single-phase carrier communication modules, in 3 secondary side single-phase carrier communication modules
One, second, third secondary side single-phase carrier communication module respectively corresponds A phase, B phase or C phase in three-phase；STA and CCO is based on carrying
Wave energy reaches group-net communication, this 3 secondary side single-phase carrier communication modules carry out in platform area identification signal under the control of CCO
After transmission.
The platform area recognition methods based on OFDM carrier signal, which is characterized in that the primary side Three Phase Carrier Based
Communication module STA-P3H module carrier signal, which accesses circuit, has impedance matching circuit, which identifies in platform area
Testing has Low ESR frequency range in the frequency band of signal, and has high impedance in the frequency band of multicarrier communication signal.
In technical solution of the present invention, the concentration by outfit carrier module CCO is installed in the output of distribution transformer secondary side nearby
Device, electric energy meter equipped with carrier module STA and can pass through CCO group-net communication under secondary side stage area, distribution transformer primary side warp
Three Phase Carrier Based communication equipment is installed, which contains primary side after overvoltage mutual inductor and current transformer
Three Phase Carrier Based communication module STA-P3H and power supply module, as shown in Figure 1, wherein PT is power transformer, and CT is electric current
Mutual inductor.
The present invention is based on the platform area recognition methods of OFDM carrier signal to include the following steps, as shown in Figure 2:
The first step, primary side Three Phase Carrier Based communication module STA-P3H is by multicarrier communication signal according to carrier networking link
Layer protocol is accessed using carrier module CCO as the carrier meter reading network of network center.Multicarrier communication signal is carrier meter reading network base
In the group-net communication signal of power line.Used carrier networking link layer protocol is using the letter for being marked with network reference time
Mark, network access node and CCO realize that clock is synchronous, when CCO is sent by each node of beacon announcement and the communication message of itself
It carves.The network center is corresponding with following carrier meter reading networks.Carrier meter reading network is the net of tree-like branched structure
Network, each branch are equivalent to through relaying, downstream site data superior are transmitted, is finally pooled to " network center ", i.e.,
CCO.Such as Fig. 4, wherein PCO is to act on behalf of website, does relay forwarding in communication；STA is common communication site.Relay node PCO,
Act on and carry out data forwarding in uplink communication and downlink communication, uplink communication and the path of downlink communication can it is consistent can also be with
Inconsistent, consistent advantage is that algorithm is simple；Inconsistent advantage is to can choose optimal path, and transmission speed is fast.
Second step, CCO inform that firing platform area is identified frequency band testing process by STA-P3H by multicarrier communication signal, and
Inform that STA-P3H is used for the test signal sending instant of platform area identification.Test signal for the identification of platform area, which is that covering is selected, to be surveyed
Whole subcarriers of examination frequency band load the ofdm modulation signal for setting identical amplitude, and the frequency band of platform area identification test signal uses
Lower than the frequency band of multicarrier communication signal.
In given time, STA-P3H receives the test signal for the identification of platform area that CCO is sent, and platform area is identified frequency band
Test data is sent to CCO by multicarrier communication signal.Platform area identifies that frequency band test data includes that received area's identification of institute is surveyed
Trial signal from transformer secondary to it is primary, in the attenuation amplitude value of each subcarrier.
Third step, CCO inform that STA-P3H i.e. by firing platform area identification process, and informs STA- by multicarrier communication signal
Selected area's identification signal of P3H is at the time of the signal amplitude value and sending station area identification signal of each subcarrier.Platform area
Identification signal is that each subcarrier is encoded using phase-shift keying (PSK) modulation system, by error checking and correction in platform area identification signal frequency band
Load CCO platform area identification information load data is simultaneously attached with leading signal of communication.CCO selected section electric energy meter carrier wave STA mould
Block identifies relaying STA module as platform area, and platform area identification relaying STA module is according to CCO given time repeater station area identification signal.
The electric energy meter carrier wave STA module that the signal can be received will mark oneself corresponding electric energy meter to belong to the CCO platform area.
STA-P3H at the time of CCO and its platform area identification relaying STA module sending station area's identification signal, know by sending station area
Other disabling signal, the signal block the platform sent from secondary side CCO and platform area identification relaying STA module in transformer primary side
The area's area identification signal Zhong Tai identification information receives and recognizes.Platform area identifies disabling signal and using identical modulation system, identical
Symbol lengths, and platform area identification disabling signal is random sequence data in the loaded load data of each subcarrier, and amplitude is small
Yu Taiqu identification signal each subcarrier signal amplitude value, and be greater than platform area identification signal each subcarrier signal
Range value is subtracted from transformer secondary to primary attenuation amplitude value.
4th step, CCO start the collection to platform zone state, and STA module is reported to CCO's oneself by multicarrier communication signal
Platform zone state, CCO, which is integrally counted and recorded, is subordinate to the STA module in this TV station area and the STA module in non-this TV station area and its corresponding electric energy
Table and power consumer.
In addition, distribution transformer primary side is equipped with three-phase electric energy meter after voltage transformer and current transformer, three
Primary side Three Phase Carrier Based communication module STA-P3H is fitted on phase electric energy meter.
In addition, if STA-P3H cannot be networked by multicarrier communication signal, then CCO directly passes through in the aforementioned first step
Based on the STA module that multicarrier communication signal application networks, judge that these modules and its corresponding electric energy meter belong to same area.
In addition, the error checking and correction coding of platform area identification signal uses convolutional encoding.
In addition, multicarrier communication signal, by the way of single-phase load, signal, platform area identification signal and platform are tested in the identification of platform area
Area identifies disabling signal in such a way that three-phase loads simultaneously.
In addition, the platform area identification signal of CCO sending can be received in aforementioned third step, in this TV station area and parse appearance
While the STA module of area's identification information is reported to the platform zone state of CCO oneself by multicarrier communication signal, also comprising its reception
The signal strength of the platform area identification signal arrived；CCO selection signal intensity is less than set threshold value, and network level is greater than the carrier wave of threshold value
STA module identifies relaying STA module as platform area；CCO informs that STA-P3H and other electric energy meters are carried by multicarrier communication signal
The identification list and its sending instant of the module platform area wave STA identification relaying STA module；The load data of platform area identification signal includes
Platform area identification information, relay forwarding series.
In addition, the selected relaying STA module of CCO is secondary side Three Phase Carrier Based communication module in aforementioned third step.
In addition, the selected relaying STA module of CCO is 3 secondary side lists for respectively corresponding three-phase in aforementioned third step
Phase carrier communication module.
In addition, primary side Three Phase Carrier Based communication module STA-P3H module carrier signal access circuit has impedance matching electricity
Road, the impedance matching circuit have Low ESR frequency range in the frequency band that platform area identifies test signal, and in multicarrier communication signal
Frequency band has high impedance.
Principle is explained:
Carrier communication used by power information acquisition system uses the technology of multinomial promotion communication performance at present.
Firstly, making full use of bandwidth resources by OFDM modulation technique, more data can be carried and transmitted in broad frequency band.The
Two, the communication band low frequency of actual use is higher than 0.7MHz, and high frequency can reach 12MHz, subcarrier optional based on OFDM frequency band
Channel is optional.Third increases verification data based on Turbo coding and decoding technology, to translate using error correction on the basis of initial data
Code algorithm obtains the data reception capabilities under negative signal-to-noise ratio.4th, although low-voltage power carrier site environment is complicated, it is based on
Channel estimation function can noise, decaying and phase shift to each multicarrier communication effectively assessed, to be estimated based on channel
Meter and soft demodulation techniques promote communication performance.5th, data are sent in by time domain based on diversity duplication technology and frequency domain realization is superfluous
It is remaining, to avoid the accidental interference of time domain, avoid the certain interference of certain frequency points in frequency domain.
It is based on being substantially improved for current carrier communication performance, multicarrier communication signal has stronger transmission energy at present
Power can cross over transformer sometimes.The permeability characteristics of 500k or 1MHz frequencies above, transformer core decline, at this time distribution
Transformer is equivalent to air-core transformer, and the carrier signal in this frequency band has certain passing through property, while being also that current power line carries
Wave meter reading using frequency band.Usually in 1k~1MHz frequency range, transformer can be to the frequency because of the aggravation of its eddy-current loss
Band signal has stronger absorption, it is possible to carry out the identification of platform area using the carrier signal being attenuated in the frequency range.For
This, the frequency band of this programme multicarrier communication signal and platform area identify that signal band used uses different frequency bands, respectively correspond 500k or
Low-frequency band of the high frequency band of 1MHz or more under.
But meanwhile the frequency transmission characteristic of real transformer is different.So if in distribution transformer primary side
Module STA-P3H cannot then illustrate the carrier wave based on high frequency band by the meter reading network for the secondary side CCO that multicarrier communication signal enters
Signal of communication will not travel to other transformer platform areas, that is, can be directly used for the identification of platform area.If STA-P3H can pass through carrier wave
Signal of communication networks, then application station area is needed to identify corresponding signal band, and first tests the signal warp of which frequency point under the frequency band
Crossing transformer will form greater attenuation.CCO passes through and STA-P3H interaction, learns these frequency points with greater attenuation, and utilize
These frequency point loading bench area identification signals, and the preferable frequency point of passing through property is not loaded with or loads the area amplitude Hen Ditai identification letter
Number.
STA-P3H module forms Low ESR in platform area identification signal frequency band by impedance matching circuit, also can be to platform
Area's identification signal plays certain attenuation.In addition, transformer characteristic can also be utilized by obtaining the decaying of platform area identification signal.Match
Piezoelectric transformer primary side generallys use delta connection, and secondary side generallys use star connection.In each Xiang Shangjia phase of secondary side
With the voltage signal of amplitude, after star triangular transformation, primary side signal will cancel out each other, to obtain larger decline in primary side
Subtract.So this programme CCO is in the three-phase test signal of sending station area identification simultaneously and platform area identification signal.Meanwhile the identification of platform area
It relays STA module selection Three Phase Carrier Based communication module or 3 respectively corresponds the single-phase carrier communication module of three-phase while sending out
The area Song Tai identification signal.The impedance matching circuit such as Fig. 3, L1, C1；C7, L5 are matching network parts, L2, C2, C3, L3,
C4, C5, L4, C6 are bandpass filter parts, have Low ESR frequency range in the frequency band that platform area identifies test signal, and in carrier wave
The frequency band of signal of communication has high impedance.
By the subcarrier for selecting to have decaying, platform area identification signal reaches primary side from secondary side by distribution transformer
There is greater attenuation afterwards, but because this programme modules have higher sensitivity to the reception of platform area identification signal, this
Area's identification signal may still be received by other area's signals.Further STA-P3H module is in CCO sending station area's identification signal
It carves, while sending station area identifies that disabling signal, i.e. two signals collide.Based on carrier communication STA-P3H and CCO in clock
Upper realization synchronizes, and thus utilizes ofdm signal characteristic, as long as the platform area identification disabling signal of signal collision occurs in corresponding son
Signal amplitude on carrier wave is slightly higher, that is, may make not solving in the communication module in primary side and other areas and put into effect area's identification letter
Number CCO platform area identification information for being included.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. a kind of platform area recognition methods based on OFDM carrier signal, distribution transformer secondary side output end are equipped with outfit carrier wave
The concentrator of module CCO, electric energy meter, and can be special by CCO group-net communication equipped with carrier module STA under secondary side stage area
Sign is, comprising the following steps:
The first step, primary side high pressure Three Phase Carrier Based communication module STA-P3H is by multicarrier communication signal according to carrier networking link
Layer protocol is accessed using low pressure concentrator carrier module CCO as the carrier meter reading network of network center, and multicarrier communication signal is carrier wave
Group-net communication signal of the meter reading network based on power line；
Second step, CCO notify high pressure Three Phase Carrier Based communication module STA-P3H to identify firing platform area by multicarrier communication signal
Frequency band test process, and notify STA-P3H for the test signal sending instant of platform area identification；
Described area's identification frequency band test process includes: CCO sending station area identification frequency band test signal to STA-P3H, STA-P3H
It measures；STA-P3H reports measurement result to CCO；
" platform area identifies frequency band test process " specifically: during first selection subcarrier frequency point, low pressure collection
Middle device carrier module CCO first issues the platform area identification test signal of whole subcarriers in 10~500kHz in the form of ofdm signal,
It is received by high pressure Three Phase Carrier Based communication module STA-P3H, STA-P3H feeds back to each sub-carrier signal strengths received
CCO；CCO selects to decay biggish subcarrier frequency point as the final platform area identification transmission selected subcarrier frequency point of signal；
Third step, CCO notifies STA-P3H that firing platform area is identified process by multicarrier communication signal, and notifies STA-P3H institute
The platform area identification signal of selection is at the time of the signal amplitude value and sending station area identification signal of each subcarrier；
Described area identifies process, comprising: CCO sends test signal, and STA-P3H sends disabling signal；
The platform area identifies process specifically: CCO loads the identification information of oneself based on selected subcarrier, carries out the knowledge of platform area
Not；While CCO sends identification signal, STA-P3H issues the interference signal for being directed to these subcarrier frequency points, blocks the identification of platform area
For signal in the propagation of primary side, same this area identification signal also just can not be by the low -voltage Watt -hour meter carrier module in other areas
STA identification；And be located in secondary side this TV station area, the STA that can receive this area identification signal marks oneself platform zone state, most
The state of each STA is read by CCO eventually, arranges platform area recognition result；
4th step, CCO start the collection to platform zone state, and STA module will be on the platform zone state of oneself by multicarrier communication signal
CCO is offered, platform zone state includes whether STA detects the mark of platform area identification signal, detected area's identification information and institute
In phase flag, CCO integrally count and record the STA module for being subordinate to this TV station area number and non-this TV station area STA module number,
And its corresponding electrical energy meter electricity energy table address number and power consumer are numbered.
2. the platform area recognition methods according to claim 1 based on OFDM carrier signal, which is characterized in that the distribution
The position that transformer primary side passes through after voltage transformer and current transformer is equipped with three-phase electric energy meter, on three-phase electric energy meter
It is fitted with primary side Three Phase Carrier Based communication module STA-P3H.
3. the platform area recognition methods according to claim 2 based on OFDM carrier signal, which is characterized in that described first
In step, these modules and its corresponding electric energy can be judged by the STA module that networks based on multicarrier communication signal application, CCO
Platform area where table belongs to this CCO；These modules cannot be judged by the STA module that networks based on multicarrier communication signal application, CCO
And its corresponding electric energy meter is not belonging to the place this CCO platform area.
4. the platform area recognition methods according to claim 1 based on OFDM carrier signal, which is characterized in that the platform area
The error checking and correction coding of identification signal uses convolutional encoding.
5. the platform area recognition methods according to claim 1 based on OFDM carrier signal, which is characterized in that the carrier wave
By the way of single-phase load, multicarrier communication signal single-phase loads signal of communication respectively using A, B, C are each；The identification test of platform area
Signal, platform area identification signal and platform area identification disabling signal are loaded simultaneously using A, B, C three-phase.
6. the platform area recognition methods according to claim 1 based on OFDM carrier signal, it is characterised in that: the third
The platform area identification signal of CCO sending can be received in step, in this TV station area and parses the STA module for putting into effect area's identification information, institute
While the platform zone state of oneself is reported to CCO by multicarrier communication signal by the STA module stated, which will connect simultaneously
The reporting signal strength of the platform area identification signal received is to CCO；So as to CCO to the further relay forwarding of platform area identification signal into
Row manages and controls；
CCO selection signal intensity is less than set threshold value, network level is greater than the carrier wave STA module of threshold value as platform area identification relaying
STA module；
CCO notifies STA-P3H and other electric energy meter carrier wave STA modules by multicarrier communication signal, and content of announcement includes: described
The identification list of area's identification relaying STA module and its load data of sending instant and platform area identification signal, platform area identification letter
Number load data include platform area identification information, relay forwarding series.
7. the platform area recognition methods according to claim 1 based on OFDM carrier signal, which is characterized in that the third
In step, the selected relaying STA module of CCO is secondary side Three Phase Carrier Based communication module.
8. the platform area recognition methods according to claim 1 based on OFDM carrier signal, which is characterized in that the third
In step, the selected relaying STA module of CCO is 3 secondary side single-phase carrier communication modules, 3 secondary side single-phase carrier communications
The first, second, third secondary side single-phase carrier communication module in module respectively corresponds A phase, B phase or C phase in three-phase；STA
With CCO be based on carrier wave can group-net communication, this 3 secondary side single-phase carrier communication modules carry out platform area under the control of CCO
The relaying of identification signal is sent.
9. the platform area recognition methods according to claim 2 based on OFDM carrier signal, which is characterized in that described is primary
Side Three Phase Carrier Based communication module STA-P3H module carrier signal, which accesses circuit, has impedance matching circuit, the impedance matching circuit
There is Low ESR frequency range in the frequency band that platform area identifies test signal, and there is high impedance in the frequency band of multicarrier communication signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639355.8A CN110266348B (en) | 2019-07-16 | 2019-07-16 | Method for identifying distribution room based on OFDM carrier signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639355.8A CN110266348B (en) | 2019-07-16 | 2019-07-16 | Method for identifying distribution room based on OFDM carrier signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110266348A true CN110266348A (en) | 2019-09-20 |
| CN110266348B CN110266348B (en) | 2021-09-14 |
Family
ID=67926371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910639355.8A Active CN110266348B (en) | 2019-07-16 | 2019-07-16 | Method for identifying distribution room based on OFDM carrier signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110266348B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687332A (en) * | 2019-11-11 | 2020-01-14 | 浙江巨磁智能技术有限公司 | Automatic pairing method for switch side active ammeter and circuit breaker |
| CN110907724A (en) * | 2019-11-14 | 2020-03-24 | 华中科技大学 | Multi-area identification method and device for IT-type low-voltage distribution network |
| CN111030097A (en) * | 2019-12-11 | 2020-04-17 | 江苏方天电力技术有限公司 | Low-voltage distribution network platform area topology identification method and system |
| CN111080473A (en) * | 2019-11-19 | 2020-04-28 | 深圳供电局有限公司 | Method and device for identifying station area, computer equipment and readable storage medium |
| CN111126141A (en) * | 2019-11-19 | 2020-05-08 | 深圳供电局有限公司 | Method, device and system for identifying station area, computer equipment and readable storage medium |
| CN111711469A (en) * | 2020-06-11 | 2020-09-25 | 钜泉光电科技(上海)股份有限公司 | Signal-to-noise ratio-based station area identification method and system, storage medium and STA node |
| CN111817301A (en) * | 2020-07-23 | 2020-10-23 | 国网浙江省电力有限公司营销服务中心 | Low-voltage branch topology identification method for carrier station area |
| CN111935739A (en) * | 2020-07-30 | 2020-11-13 | 合肥新线通信科技有限公司 | Transformer area identification method based on transformer area characteristic information |
| CN113824471A (en) * | 2021-09-30 | 2021-12-21 | 广东电网有限责任公司 | Method and device for identifying distribution area, terminal equipment and storage medium |
| CN114157929A (en) * | 2021-12-09 | 2022-03-08 | 国网重庆市电力公司营销服务中心 | Method and device for identifying user-variable relationship, electronic equipment and medium |
| CN114421997A (en) * | 2021-12-14 | 2022-04-29 | 江苏芯云电子科技有限公司 | Power line carrier hybrid networking method, device and system |
| CN115701005A (en) * | 2022-11-04 | 2023-02-07 | 杭州万高科技股份有限公司 | Platform area identification method based on Z-plane zero-pole design |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140257580A1 (en) * | 2013-03-08 | 2014-09-11 | Chin Wen LIU | Power line carrier control module |
| CN106383265A (en) * | 2016-08-26 | 2017-02-08 | 北京中宸泓昌科技有限公司 | Transformer area and access phase automatic recognition device and method |
| CN107689817A (en) * | 2017-09-30 | 2018-02-13 | 北京中电普华信息技术有限公司 | A kind of recognition methods of user's taiwan area phase and system |
| CN109256856A (en) * | 2018-09-06 | 2019-01-22 | 石家庄科林电气股份有限公司 | The platform area topology identifying system and method realized based on power wire broadband carrier (HPLC) |
| CN109687891A (en) * | 2018-12-11 | 2019-04-26 | 国网重庆市电力公司客户服务中心 | One kind being based on the area's recognition methods of broadband power line carrier platform |
| CN109856507A (en) * | 2019-03-19 | 2019-06-07 | 广东电网有限责任公司 | A kind of low-voltage platform area line family relation recognition method and system based on current distortion |
-
2019
- 2019-07-16 CN CN201910639355.8A patent/CN110266348B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140257580A1 (en) * | 2013-03-08 | 2014-09-11 | Chin Wen LIU | Power line carrier control module |
| CN106383265A (en) * | 2016-08-26 | 2017-02-08 | 北京中宸泓昌科技有限公司 | Transformer area and access phase automatic recognition device and method |
| CN107689817A (en) * | 2017-09-30 | 2018-02-13 | 北京中电普华信息技术有限公司 | A kind of recognition methods of user's taiwan area phase and system |
| CN109256856A (en) * | 2018-09-06 | 2019-01-22 | 石家庄科林电气股份有限公司 | The platform area topology identifying system and method realized based on power wire broadband carrier (HPLC) |
| CN109687891A (en) * | 2018-12-11 | 2019-04-26 | 国网重庆市电力公司客户服务中心 | One kind being based on the area's recognition methods of broadband power line carrier platform |
| CN109856507A (en) * | 2019-03-19 | 2019-06-07 | 广东电网有限责任公司 | A kind of low-voltage platform area line family relation recognition method and system based on current distortion |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687332A (en) * | 2019-11-11 | 2020-01-14 | 浙江巨磁智能技术有限公司 | Automatic pairing method for switch side active ammeter and circuit breaker |
| CN110907724A (en) * | 2019-11-14 | 2020-03-24 | 华中科技大学 | Multi-area identification method and device for IT-type low-voltage distribution network |
| CN111126141B (en) * | 2019-11-19 | 2023-12-29 | 深圳供电局有限公司 | Area identification method, apparatus, system, computer device and readable storage medium |
| CN111080473A (en) * | 2019-11-19 | 2020-04-28 | 深圳供电局有限公司 | Method and device for identifying station area, computer equipment and readable storage medium |
| CN111126141A (en) * | 2019-11-19 | 2020-05-08 | 深圳供电局有限公司 | Method, device and system for identifying station area, computer equipment and readable storage medium |
| CN111080473B (en) * | 2019-11-19 | 2024-01-23 | 深圳供电局有限公司 | Area identification method, apparatus, computer device and readable storage medium |
| CN111030097A (en) * | 2019-12-11 | 2020-04-17 | 江苏方天电力技术有限公司 | Low-voltage distribution network platform area topology identification method and system |
| CN111711469A (en) * | 2020-06-11 | 2020-09-25 | 钜泉光电科技(上海)股份有限公司 | Signal-to-noise ratio-based station area identification method and system, storage medium and STA node |
| CN111817301A (en) * | 2020-07-23 | 2020-10-23 | 国网浙江省电力有限公司营销服务中心 | Low-voltage branch topology identification method for carrier station area |
| CN111935739A (en) * | 2020-07-30 | 2020-11-13 | 合肥新线通信科技有限公司 | Transformer area identification method based on transformer area characteristic information |
| CN113824471A (en) * | 2021-09-30 | 2021-12-21 | 广东电网有限责任公司 | Method and device for identifying distribution area, terminal equipment and storage medium |
| CN114157929A (en) * | 2021-12-09 | 2022-03-08 | 国网重庆市电力公司营销服务中心 | Method and device for identifying user-variable relationship, electronic equipment and medium |
| CN114421997B (en) * | 2021-12-14 | 2023-09-29 | 江苏芯云电子科技有限公司 | Power line carrier hybrid networking method, device and system |
| CN114421997A (en) * | 2021-12-14 | 2022-04-29 | 江苏芯云电子科技有限公司 | Power line carrier hybrid networking method, device and system |
| CN115701005A (en) * | 2022-11-04 | 2023-02-07 | 杭州万高科技股份有限公司 | Platform area identification method based on Z-plane zero-pole design |
| CN115701005B (en) * | 2022-11-04 | 2024-04-19 | 杭州万高科技股份有限公司 | Z-plane zero pole design-based platform region identification method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110266348B (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110266348A (en) | A kind of platform area recognition methods based on OFDM carrier signal | |
| CN109687891B (en) | Carrier region identification method based on broadband power line | |
| Cano et al. | State of the art in power line communications: From the applications to the medium | |
| Berger et al. | Power line communications for smart grid applications | |
| Lewis et al. | Assessment of communication methods for smart electricity metering in the UK | |
| Nassar et al. | Local utility power line communications in the 3–500 kHz band: Channel impairments, noise, and standards | |
| Amarsingh et al. | Narrowband power line communications: Enabling the smart grid | |
| Artale et al. | A new PLC-based smart metering architecture for medium/low voltage grids: Feasibility and experimental characterization | |
| Ndjiongue et al. | Power line communications (PLC) technology: More than 20 years of intense research | |
| JP2016519555A (en) | System and method for inferring schematic and topological characteristics of a distribution grid | |
| CN102355313B (en) | Power line communication method based on channel cognitive technology | |
| CN205490603U (en) | Low pressure power line broadband carrier communication NULL device | |
| Cortés et al. | Analysis of narrowband power line communication channels for advanced metering infrastructure | |
| Razazian et al. | G3-PLC field trials in US distribution grid: Initial results and requirements | |
| Masood et al. | Standardization and deployment scenario of next generation NB-PLC technologies | |
| Varadarajan et al. | Empirical measurements of the low-frequency power-line communications channel in rural North America | |
| CN104954112B (en) | A kind of across frequency band power line carrier frequencies cognitive approach based on thin frequency granularity | |
| Borovina et al. | Error performance analysis and modeling of narrow-band PLC technology enabling smart metering systems | |
| Liu | Emulation of narrowband powerline data transmission channels and evaluation of PLC systems | |
| Berganza et al. | PRIME on-field deployment First summary of results and discussion | |
| Artale et al. | Narrowband power line communications for medium voltage Smart Grids | |
| Cortés et al. | Smart metering systems based on power line communications | |
| CN102629880A (en) | Testing method of medium-voltage carrier communication system | |
| CN202309702U (en) | Power line communication device based on information channel cognitive technology | |
| Borovina et al. | Investigation of Narrow-Band Power-Line Carrier Communication System Performance in Rural Distribution Grids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 A-501, 5th floor, Languang technology building, No.7, songpingshan new West Road, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Smart Microelectronics Technology Co.,Ltd. Address before: 518000 A-501, 5th floor, Languang technology building, No.7, songpingshan new West Road, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SPL ELECTRONIC TECHNOLOGY CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder |