CN103001668A - High-speed carrier communication technique applicable to low voltage power lines - Google Patents
High-speed carrier communication technique applicable to low voltage power lines Download PDFInfo
- Publication number
- CN103001668A CN103001668A CN2012103780472A CN201210378047A CN103001668A CN 103001668 A CN103001668 A CN 103001668A CN 2012103780472 A CN2012103780472 A CN 2012103780472A CN 201210378047 A CN201210378047 A CN 201210378047A CN 103001668 A CN103001668 A CN 103001668A
- Authority
- CN
- China
- Prior art keywords
- carrier communication
- low
- voltage power
- voltage
- applicable
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a high-speed carrier communication technique applicable to low voltage power lines. Based on alternating-current mains-frequency synchronization technology, carrier signals are transmitted in a 3.3ms period around zero passage of voltages of three-phase alternating-current mains supply. The advantages of the period such as low noise interference and stable impedance are effectively utilized, three-phase parallel carrier signal transmission on three-phase alternating-current mains supply can be achieved, and total time of acquiring consumption information of a whole distribution area is effectively shortened. Compared with the traditional carrier communication system with each 3.3ms period only allowing for transmission of 1-bit original code elements, the high-speed carrier communication technique uses symmetrical compressed encoding and high-speed AD (analog-digital) sampling, so that the number of original code elements transmitted in the 3.3ms period is increased to 10 bits. The carrier communication speed is increased by 10 times by software-implemented direct sequence spread spectrum technology and wavelet transformation technology, and the communication is unaffected. The high-speed carrier communication technique is compatible with original system applications and is implemented by pure software encoding, the carrier communication speed of low voltage power lines is evidently increased with no extra cost increased, and application prospect of the low voltage power line carrier communication technique is effectively improved.
Description
Technical field
The present invention relates to the low-voltage powerline carrier communication field, specifically refer to a kind of high speed carrier communication that is applicable to low-voltage powerline carrier communication, relate in particular to a kind of required high speed carrier communication of low-voltage powerline carrier communication mode that is applicable to power frequency synchronization zero-cross timesharing transmission.
Background technology
In recent years, voltage power-line carrier communication technology gathers the field in power information, the science and technology strength of Qingdao Topscomm Communication Co., Ltd.'s support self richness, adopt current advanced technology, researched and developed the brand-new FSK spread spectrum carrier communication system based on the low-voltage power line characteristics, at present large-scale application at the scene.But its still have much can performance boost the aspect, such as carrier communication speed.
For carrier communication speed problem, Qingdao Topscomm Communication Co., Ltd. uses at compatible original system, developed a kind of high speed carrier communication that is applicable to low-voltage power line, the pure software coding is realized, do not need additionally to increase cost and but significantly improve low-voltage powerline carrier communication speed, effectively promote the application prospect of voltage power-line carrier communication technology.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of high speed carrier communication that is applicable to low-voltage power line is provided, with the carrier communication speed of the low-voltage powerline carrier communication system that promotes existing operation, effectively promote the application prospect of voltage power-line carrier communication technology.
The invention provides a kind of high speed carrier communication that is applicable to low-voltage power line, the present invention is based on electric main power frequency simultaneous techniques, utilize respectively the three-phase alternating current civil power to be total to 3.3ms transmission carrier signal before and after the voltage zero-cross separately, utilized effectively that noise jamming is less during this period of time, the advantages such as impedance is stable, and can realize the parallel carrier signal that sends of three-phase at the three-phase alternating current civil power, the power information that effectively shortens whole district gathers total time.Can only transmit 1 raw symbol and be different from each 3.3ms of old carrier communication system, the present invention adopts symmetrical compression coding mode, sample in conjunction with high-speed AD, the raw symbol quantity of transmitting in the 3.3ms is brought up to 10, and the direct sequence spread spectrum technology and the wavelet transformation technique that cooperate software to realize, when carrier communication speed improved 10 times, communication efficiency was unaffected.
Wherein, the three-phase alternating current civil power is voltage zero-cross time at intervals 3.3ms separately, utilize accurate zero passage detection signal and software time tracking can realize that the electric main power frequency is synchronous, accurately guarantee to be total to 3.3ms transmission carrier signal before and after the voltage zero-cross separately at the three-phase alternating current civil power.Because the advantages such as it is less that the common 3.3ms time period of ac commercial power voltage zero passage front and back possesses noise jamming, and impedance is stable are conducive to low-voltage powerline carrier communication.And can realize the parallel carrier signal that sends of three-phase at the three-phase alternating current civil power, just whole district is divided into three parts by phase place and carry out respectively the power information collection, effectively shorten power information and gather total time.
Can only transmit 1 raw symbol and be different from each 3.3ms of old carrier communication system, the present invention adopts symmetrical compression coding mode, in conjunction with the high-speed AD sampling, the raw symbol quantity of transmitting in the 3.3ms is brought up to 10 from 1.Symmetrical compression coding mode comprises level coding and data-bit encoding.Be the fixed bit data to level, take into full account the factors such as ac commercial power voltage zero passage shake and noise jamming, select appropriately in level figure place and coding site, help to find out fast the True Data position in the decode procedure.Data-bit encoding is the raw symbol data after encoding, and namely truly needs the information data of transmission.
The high speed carrier communication that is applicable to low-voltage power line provided by the invention, the pure software coding is realized, does not need additionally to increase cost and but significantly improves low-voltage powerline carrier communication speed, effectively promotes the application prospect of voltage power-line carrier communication technology.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.In the accompanying drawings:
Fig. 1 is that three-phase alternating current civil power power frequency is synchronous, timesharing transmission carrier signal schematic diagram;
Fig. 2 is the symmetrical compressed encoding schematic diagram of the technology of the present invention one embodiment.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment of the invention accompanying drawing, technical scheme in the embodiment of the invention is done further clear, complete description, obviously, described embodiment is a kind of of the embodiment of the invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
A kind of high speed carrier communication that is applicable to low-voltage power line of the present invention the present invention is based on electric main power frequency simultaneous techniques, utilizes respectively the three-phase alternating current civil power to be total to 3.3ms transmission carrier signal before and after the voltage zero-cross separately, such as Fig. 1.Make innovations TCC081C, TCC082C chip and the accurate zero passage detection signal of derivative chip utilization thereof and the software time tracking of communication Co., Ltd of Qingdao can realize that the electric main power frequency is synchronous, accurately guarantees in three-phase alternating current civil power 3.3ms transmission carrier signal altogether before and after the voltage zero-cross separately.Because the advantages such as it is less that the common 3.3ms time period of ac commercial power voltage zero passage front and back possesses noise jamming, and impedance is stable are conducive to low-voltage powerline carrier communication.And can realize the parallel carrier signal that sends of three-phase at the three-phase alternating current civil power, just whole district is divided into three parts by phase place and carry out respectively the power information collection, effectively shorten power information and gather total time.
Can only transmit 1 raw symbol and be different from each 3.3ms of old carrier communication system, the present invention adopts symmetrical compression coding mode, in conjunction with high-speed AD sampling, the raw symbol quantity transmitted in the 3.3ms is brought up to 10 from 1, such as Fig. 2.Symmetrical compression coding mode comprises level coding and data-bit encoding.Be the fixed bit data to level, take into full account the factors such as ac commercial power voltage zero passage shake and noise jamming, select 8 bit alignment position figure places, to level+be 10101100B, to level-be 00110101B, to level+with to level-be full symmetric, place respectively the communication data two ends of each 3.3ms transmission, even if zero passage shake also can guarantee to receive complete one group to level, judge whether it is correct carrier communication data after to level another group of comparison is incomplete, also help to find out fast in the decode procedure True Data position.And above-mentioned this group is aimed at bit data also can play inhibitory action having in the noise jamming situation, thereby guarantees the communication success rate.Data bit wherein then is the raw symbol data behind the coding, namely truly needs the information data of transmission, because this group data bit is positioned at the position of low-voltage power line noise jamming minimum substantially, the reliability of True Data is effectively guaranteed.Data bits can effectively protect personal information at interior confidential data according to also using Software Coding to finish the encryption in physical layer of raw symbol data when not only guaranteeing carrier communication simultaneously, also can avoid the impact of other noise jamming.
In conjunction with direct sequence spread spectrum technology, the wavelet transformation technique of high-speed AD sampling and software realization, when carrier communication speed improved 10 times, communication efficiency was unaffected again.
The high speed carrier communication that is applicable to low-voltage power line provided by the invention, the pure software coding is realized, does not need additionally to increase cost and but significantly improves low-voltage powerline carrier communication speed, effectively promotes the application prospect of voltage power-line carrier communication technology.
Need to prove at last, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that; It still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.
Claims (8)
1. high speed carrier communication that is applicable to low-voltage power line, it is characterized in that, based on electric main power frequency simultaneous techniques, utilize respectively the three-phase alternating current civil power to be total to 3.3ms transmission carrier signal before and after the voltage zero-cross separately, utilized effectively that noise jamming is less during this period of time, the advantages such as impedance is stable, and can realize the parallel carrier signal that sends of three-phase at the three-phase alternating current civil power, the power information that effectively shortens whole district gathers total time.Can only transmit 1 raw symbol and be different from each 3.3ms of old carrier communication system, new technology adopts symmetrical compression coding mode, sample in conjunction with high-speed AD, the raw symbol quantity of transmitting in the 3.3ms is brought up to 10, and the direct sequence spread spectrum technology and the wavelet transformation technique that cooperate software to realize, when carrier communication speed improved 10 times, communication efficiency was unaffected.
2. the high speed carrier communication that is applicable to low-voltage power line as claimed in claim 1, it is characterized in that, the three-phase alternating current civil power is voltage zero-cross time at intervals 3.3ms separately, utilize accurate zero passage detection signal and software time tracking can realize that the electric main power frequency is synchronous, accurately guarantee to be total to 3.3ms transmission carrier signal before and after the voltage zero-cross separately at the three-phase alternating current civil power.
3. the high speed carrier communication that is applicable to low-voltage power line as claimed in claim 1 or 2, it is characterized in that, the advantages such as it is less that the common 3.3ms time period of zero passage front and back, ac commercial power voltage possesses noise jamming, and impedance is stable are conducive to low-voltage powerline carrier communication.
4. the high speed carrier communication that is applicable to low-voltage power line as claimed in claim 1 or 2, it is characterized in that, realize the parallel carrier signal that sends of three-phase at the three-phase alternating current civil power, whole district can be divided into three parts by phase place and carry out respectively the power information collection, effectively shorten power information and gather total time.
5. the high speed carrier communication that is applicable to low-voltage power line as claimed in claim 1 is characterized in that, adopts symmetrical compression coding mode, in conjunction with the high-speed AD sampling, the raw symbol quantity of transmitting in the 3.3ms is brought up to 10 from 1.
6. such as claim 1 or the 5 described high speed carrier communications that are applicable to low-voltage power line, it is characterized in that, symmetrical compression coding mode comprises level coding and data-bit encoding.
7. such as claim 1 or the 6 described high speed carrier communications that are applicable to low-voltage power line, it is characterized in that, level is encoded to the fixed bit data, help to find out fast the True Data position in the decode procedure.
8. such as claim 1 or the 5 described high speed carrier communications that are applicable to low-voltage power line, it is characterized in that, data-bit encoding is the raw symbol data after encoding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103780472A CN103001668A (en) | 2012-10-09 | 2012-10-09 | High-speed carrier communication technique applicable to low voltage power lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103780472A CN103001668A (en) | 2012-10-09 | 2012-10-09 | High-speed carrier communication technique applicable to low voltage power lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103001668A true CN103001668A (en) | 2013-03-27 |
Family
ID=47929856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103780472A Pending CN103001668A (en) | 2012-10-09 | 2012-10-09 | High-speed carrier communication technique applicable to low voltage power lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103001668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991499A (en) * | 2015-02-06 | 2016-10-05 | 钜泉光电科技(上海)股份有限公司 | OFDM power-frequency synchronous power carrier communication and physical layer coded modulation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729098A (en) * | 2008-10-28 | 2010-06-09 | 青岛鼎信通讯有限公司 | Brand new FSK spread spectrum carrier communication system based on the characteristic of power lines |
| CN102595654A (en) * | 2011-01-07 | 2012-07-18 | 华北电网有限公司计量中心 | Indoor communication network architecture and indoor communication network architectural method |
-
2012
- 2012-10-09 CN CN2012103780472A patent/CN103001668A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729098A (en) * | 2008-10-28 | 2010-06-09 | 青岛鼎信通讯有限公司 | Brand new FSK spread spectrum carrier communication system based on the characteristic of power lines |
| CN102595654A (en) * | 2011-01-07 | 2012-07-18 | 华北电网有限公司计量中心 | Indoor communication network architecture and indoor communication network architectural method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991499A (en) * | 2015-02-06 | 2016-10-05 | 钜泉光电科技(上海)股份有限公司 | OFDM power-frequency synchronous power carrier communication and physical layer coded modulation method |
| CN105991499B (en) * | 2015-02-06 | 2019-09-13 | 钜泉光电科技(上海)股份有限公司 | The synchronous power line carrier, PLC of OFDM power frequency and physical level coded modulation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103795465B (en) | Multi-stage amplitude modulation visible optical signal coding method and apparatus and decoding method and apparatus, and system | |
| CA2747202C (en) | System and method for relative phase shift keying | |
| CN202850989U (en) | High speed data transmission system based on single-core logging cable | |
| CN105139629A (en) | Method for improving data acquisition efficiency of low voltage power line broadband carrier waves | |
| WO2009055770A1 (en) | Programmable signal slicer | |
| CN102904615B (en) | Power line carrier communication method | |
| CN101667335A (en) | Power utilization information collection system and method | |
| CN103634263A (en) | Continuous-phase frequency-shift keying digital demodulation device and demodulation method implemented by same | |
| CN106330310A (en) | Optical OFDM (Orthogonal Frequency Division Multiplexing) method capable of transmitting three paths of signals simultaneously | |
| CN103795442B (en) | A kind of low-voltage power line carrier communication circuit based on OFDM mode modulation | |
| CN106160791A (en) | Three-phase multiple power lineman frequency communication means and system towards intelligent distribution network | |
| CN103001668A (en) | High-speed carrier communication technique applicable to low voltage power lines | |
| CN104467865B (en) | Serial communication protocol controller, byte split circuit and 8b10b encoders | |
| CN208461813U (en) | High speed power line carrier communication module and the electric energy meter for applying it | |
| CN105553624B (en) | A kind of predictable data communication coding | |
| CN102904612A (en) | Full-duplex communication method and device based on power line | |
| CN103401747B (en) | A kind of distributed floating controller Local network communication system | |
| CN201821345U (en) | System using ground wires for data transmission | |
| CN101330503B (en) | Method, system and equipment for transmitting data of Ethernet physical layer | |
| CN209086917U (en) | A kind of intelligent substation interval dividing device | |
| CN105071819A (en) | Multicarrier variable rate receiving processing method in fast frequency hopping system | |
| CN204423629U (en) | A kind of SOC detected for photovoltaic generation cell panel | |
| CN104637540A (en) | Receiving circuit, realization method of receiving circuit and IC (integrated circuit) card | |
| CN204539133U (en) | Remove the FH building-net ultra-broadband digital receiver of multi-access inference | |
| CN109039381A (en) | A kind of encryption method of the low-voltage power line bandwidth carrier communication for DL/T645 communications protocol |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130327 |