CN201557110U - Industrial frequency communication multi-channel signal parallel transmission system - Google Patents
Industrial frequency communication multi-channel signal parallel transmission system Download PDFInfo
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- CN201557110U CN201557110U CN2009202470701U CN200920247070U CN201557110U CN 201557110 U CN201557110 U CN 201557110U CN 2009202470701 U CN2009202470701 U CN 2009202470701U CN 200920247070 U CN200920247070 U CN 200920247070U CN 201557110 U CN201557110 U CN 201557110U
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- substation
- frequency
- user terminal
- frequency communication
- parallel transmission
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- 238000004891 communication Methods 0.000 title claims abstract description 56
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- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 241001269238 Data Species 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to an industrial frequency communication multi-channel signal parallel transmission system which comprises an industrial frequency main station, industrial frequency substations and user terminals, wherein the industrial frequency main station is connected with industrial frequency substations and the user terminals through a feeding line, the industrial frequency substations are installed on terminal transformer substations, the user terminals are connected with a power supply, and industrial frequency communication signals between the industrial frequency substations and the user terminals penetrate through the transformer for transmission. The utility model designs an industrial frequency communication multi-channel signal parallel transmission system according to the characteristics of middle and low voltage power distribution networks in China, and the system can prominently improve the speed of industrial frequency communication techniques and expands the application range of the industrial frequency communication technique.
Description
Technical field:
The utility model relates to communication technical field, is specifically related to a kind of frequency communication multiple signals parallel transmission system that is used for electricity substation.
Background technology:
The frequency communication technology is utilized the power-frequency voltage zero crossing to modulate power-frequency voltage and power current respectively and is realized two-way communication, compares with other power-line carrier communication, has long transmission distance, advantage that reliability is high.But because power frequency has only 50Hz, limited the transmission rate of frequency communication, downstream rate has only 50bps, and it is up in order to improve reliability, traffic rate after encoded is 12.5bps only, numerous subscriber terminal equipments of low-pressure side and master station communication need be waited for the long time cycle, can not satisfy such as system applies requirements such as remote concentrated ammeter readings.Therefore it is significant to improve frequency communication system uplink transmission rate.
At present, realized the multiplex techniques of frequency communication upward signal in the U.S., promptly a plurality of subscriber terminal equipments are the parallel transmission data simultaneously, efficiently solve the stand-by period of a large amount of dispersion user uplink communications like this.Because what China's medium voltage distribution network adopted is phase three-wire three small current neutral grounding mode, three-phase distribution Transformer Winding form mainly contains Y/y
N0And D/y
N11, the low and medium voltage distribution network system is different from the U.S., therefore external existing multiplex techniques and inapplicable China power distribution network.
The utility model content:
The utility model purpose is: according to the characteristics of transformer station's connection type of China's low and medium voltage distribution network, medium voltage distribution network wiring, distribution transformer, low-voltage network wiring, a kind of frequency communication multiple signals parallel transmission system that becomes hundred times raising uplink communication speed improves domestic frequency communication The Application of Technology.
For achieving the above object, the utility model provides a kind of frequency communication multiple signals parallel transmission system, its improvement is: this system comprises power frequency main website, power frequency substation and user terminal, described power frequency substation is installed in one-end substation, and be connected with the power frequency main website with user terminal, described user terminal also is connected with power supply, and the frequency communication signal between described power frequency substation and the user terminal penetrates the transformer transmission.
An optimal technical scheme of the present utility model is: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: described user terminal has 18, is installed on the three phase mains.
Of the present utility model one more preferably technical scheme be: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: described user terminal has on 6 A phase lines that are installed in low pressure 220V power supply the power frequency substation is sent data simultaneously.
Of the present utility model one more preferably technical scheme be: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: described user terminal has on 6 B phase lines that are installed in low pressure 220V power supply the power frequency substation is sent data simultaneously.
Of the present utility model one more preferably technical scheme be: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: described user terminal has on 6 C phase lines that are installed in low pressure 220V power supply the power frequency substation is sent data simultaneously.
Another optimal technical scheme of the utility model is: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: on every feeder line of described power frequency substation connection transformer station current sensor is installed, the bar number of described feeder line is N, and then power frequency substation upward signal is accepted speed and improved N doubly.
The utility model another more preferably technical scheme be: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: described power frequency substation comprises substation receiving element 11, substation controller 12, substation dispensing device 13 and substation modulation transformer 14, described substation receiving element is installed on the feeder line, and the upward signal of the responsible user terminal that receives, connect by bus between described substation receiving element 11 and the substation controller 12.
The utility model another more preferably technical scheme be: described a kind of frequency communication multiple signals parallel transmission system, its improvement is: described substation receiving element 11 extracts upward signal by the described current transformer on the feeder line.
The utility model beneficial effect: adopt frequency communication multiple signals parallel transmission of the present utility model system can become hundred times raising uplink communication speed, expanded frequency communication The Application of Technology scope, promoted the application at home of frequency communication technology.
Term: the upward signal among the application refers to that user terminal mails to the signal of substation, and downstream signal refers to that the power frequency substation mails to the signal of user terminal.
Description of drawings:
Fig. 1 the utility model frequency communication system constitutes schematic diagram.
The single-phase upward signal information source modulation of Fig. 2 the utility model power frequency multichannel communication schematic diagram.
Fig. 3 the utility model power frequency multichannel communication three-phase signal time-division transmission schematic diagram.
Many feeder lines of Fig. 4 the utility model power frequency multichannel communication upward signal subregion receives schematic diagram.
Fig. 5 the utility model power frequency multichannel communication upward signal is by the coupling schematic diagram of distribution transformer
Embodiment:
As shown in Figure 1, a kind of frequency communication multiple signals parallel transmission of the present utility model system comprises: power frequency main website 15, power frequency substation 16 and user terminal 17, power frequency substation 16 is installed in one-end substation 18, and be connected with power frequency main website 15 with user terminal 17, user terminal 17 is installed between the live wire and zero line of 220V low-voltage customer power supply.Frequency communication signal between power frequency substation 16 and the user terminal 17 penetrates transformer 19 transmission.User terminal 17 has 18, is installed on the low pressure 220V three phase mains, and 6 user terminals install 17 on power supply A phase line, simultaneously to power frequency substation 16 transmit ascending datas; 6 user terminals 17 are installed on the power supply B phase line, simultaneously to power frequency substation 16 transmit ascending datas; 6 user terminals 17 are installed on the power supply C phase line, simultaneously to power frequency substation 16 transmit ascending datas.Power frequency substation 17 connects on every feeder line of transformer stations current sensor 20 is installed, and the bar number of described feeder line is N, and then power frequency substation upward signal is accepted speed and improved N doubly.
Shown in the single-phase signal parallel transfer encoding of Fig. 2 the utility model schematic diagram, check-in signal one " bit " is the unit modulation with 4 adjacent voltage cycles.With 4 adjacent voltage cycles is the unit modulation signal, then has 8 voltage over zero to use, and then the combination of signal code character has
In, considering after the code character complementation has 18 kinds of signal modulating-codings.When user terminal 17 modulation, the current impulse at 1,3,5,7 places be on the occasion of, 2,4,6,8 place's current impulses are negative value.Every bit was represented with 4 current impulses when simulation became numeral, and signal vector is formed in 8 current impulses:
F
k＝[a
1?a
2?a
3?a
4?a
5?a
6?a
7?a
8]′
All 18 groups modulation source encodings are as shown in table 1 below:
Table 1 multichannel frequency communication upward signal source encoding diagram
Detect vector:
D
k＝[d
1?d
2?d
3?d
4?d
5?d
6?d
7?d
8]
The detection of 18 groups of modulating-codings is vectorial as following table 2 results:
Table 2 multichannel frequency communication detects vector
Finish detection calculations: [A
" 1 "]=[D] * [F
" 1 "], can get following result, see Table 3:
Table 3 multichannel frequency communication detection calculations result
Can judge the grouping that multichannel frequency communication single-phase six road transmits simultaneously according to table 3, every group of six passages, promptly every group can six the road transmit ascending datas simultaneously, as shown in table 4:
Table 4 multichannel frequency communication single-phase six road transmits grouping simultaneously
Substation receiving system scm software program is finished following detection calculations:
A
K＝[D
k]×[F
k]＝d
1a
1+d
2a
2+d
3a
3+d
4a
4+d
5a
5+d
6a
6+d
7a
7+d
8a
8
According to operation result is the separable upward signal that power line single-phase last 6 road transmits simultaneously that identifies.
As shown in Figure 3, in the three phase mains of low pressure 220V, A phase, B phase, C phase voltage waveform mutual deviation 120 degree electrical degrees, minimum differs 30 degree electrical degrees between the three-phase voltage waveform pass zero point, i.e. and 3.33ms staggered on the time.When the terminal that A phase, B phase, C go up is mutually transmitted upward signal simultaneously, the main energy part of signal is not because overlapping on the time, the upward signal that three-phase transmits simultaneously can be identified reliably by analog bandpass filtering and suitable detection algorithm and according to signal transient state characteristics in power frequency substation 16.When power frequency substation 16 was detected, the detection vector shown in the associative list 3 can detect mutually last 6 user terminals 17 of A, mutually last 6 user terminals 17 of B, mutually last 6 user terminals 17 of C 18 upstream datas that user terminal 17 transmits simultaneously at most altogether.
Receive schematic diagram as many feeder lines of Fig. 4 power frequency multichannel communication upward signal subregion.Power frequency substation 16 comprises substation receiving element 11, substation controller 12, substation dispensing device 13, substation modulation transformer 14 in the transmission of power frequency multiple signals.Wherein each substation receiving element 11 is responsible for the reception of all the user terminal upward signals on the feeder line, be responsible for the reception of user terminal upward signal under all distribution transformers on article one feeder line as first substation receiving element 11 among Fig. 4, be first subregion in the power frequency multiple signals parallel transmission system.Connect by fieldbus between substation receiving element 11 and the substation controller 12.Substation receiving element 11 extracts upward signal by the current transformer on the feeder line 20, and current transformer 20 can adopt measures current transformer or protective current instrument transformer.
The basic process of system communication is: substation controller 12 control sub-station dispensing devices modulation power frequency downstream signal, and start all substation receiving element 11 standards and be received the power frequency upward signal, user terminal 17 on this moment same substation bus bar all monitors downstream signal, here hypothesis has N bar feeder line, and then the downstream signal address information comprises the address information of 18N user terminal.Behind the user terminal 17 synchronous uplink and downlink signals, judge whether the address information of oneself.Have then present ammeter related data packing is mail to power frequency substation 16, otherwise then continue to intercept downstream signal.
Upward signal is distributing alternately coupling as shown in Figure 5 by transformer 19, comprising phase voltage modulation and line voltage modulated.Be primarily aimed at widely used Y/y in the Chinese power distribution network
N0And D/y
N11Two kinds of transformers.Strengthen check-in signal when offsetting background current (being mainly the 50Hz power current), the then following computing of upward signal receiving processing circuit:
S in the formula
a, s
b, s
cRepresent respectively that corresponding A, B, C go up mutually synthetic after upward signal.i
a, i
b, i
cThe current signal that expression A, B, C go up mutually comprises upward signal and noise signal.
According to the coupling characteristics of upward signal by transformer.11 pairs of signals of substation receiving element of being responsible for every feeder line in the receiving system of substation synthesize, by the synthetic energy of signal reliable recognition multichannel upward signal.
Claims (8)
1. frequency communication multiple signals parallel transmission system, it is characterized in that: this system comprises power frequency main website (15), power frequency substation (16) and user terminal (17), described power frequency main website (15) is connected with user terminal (17) with power frequency substation (16) by feeder line, described power frequency substation (16) is installed in one-end substation (18), described user terminal (17) also is connected with power supply, and the frequency communication signal between described power frequency substation (16) and the user terminal (17) penetrates transformer (19) transmission.
2. a kind of frequency communication multiple signals parallel transmission as claimed in claim 1 system, it is characterized in that: described user terminal (17) has 18, is installed on the three phase mains.
3. a kind of frequency communication multiple signals parallel transmission as claimed in claim 2 system is characterized in that: described user terminal (17) has on 6 A phase lines that are installed in low pressure 220V power supply power frequency substation (16) is sent data simultaneously.
4. a kind of frequency communication multiple signals parallel transmission as claimed in claim 2 system is characterized in that: described user terminal (17) has on 6 B phase lines that are installed in low pressure 220V power supply power frequency substation (16) is sent data simultaneously.
5. a kind of frequency communication multiple signals parallel transmission as claimed in claim 2 system is characterized in that: described user terminal (17) has on 6 C phase lines that are installed in low pressure 220V power supply power frequency substation (16) is sent data simultaneously.
6. a kind of frequency communication multiple signals parallel transmission as claimed in claim 1 system, it is characterized in that: current transformer (20) is installed on every feeder line of described power frequency substation (16) connecting terminal transformer station (18), the bar number of described feeder line is N, and then power frequency substation upward signal is accepted speed and improved N doubly.
7. a kind of frequency communication multiple signals parallel transmission as claimed in claim 6 system, it is characterized in that: described power frequency substation comprises substation receiving element (11), substation controller (12), substation dispensing device (13) and substation modulation transformer (14), described substation receiving element (11) is installed on the feeder line, and the upward signal of the responsible user terminal that receives, connect by bus between described substation receiving element (11) and the substation controller (12).
8. a kind of frequency communication multiple signals parallel transmission as claimed in claim 7 system, it is characterized in that: described substation receiving element 11 extracts upward signal by the described current transformer (20) on the feeder line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202470701U CN201557110U (en) | 2009-11-17 | 2009-11-17 | Industrial frequency communication multi-channel signal parallel transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202470701U CN201557110U (en) | 2009-11-17 | 2009-11-17 | Industrial frequency communication multi-channel signal parallel transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025194A (en) * | 2010-10-09 | 2011-04-20 | 华北电力大学 | Power frequency communication synchronous detection method and device for industrial power grid |
| CN105098985A (en) * | 2015-08-21 | 2015-11-25 | 光一科技股份有限公司 | System and method for identifying user change relationships in low-voltage power distribution based on power-frequency voltage distortion |
| CN106160791A (en) * | 2015-03-30 | 2016-11-23 | 国家电网公司 | Three-phase multiple power lineman frequency communication means and system towards intelligent distribution network |
-
2009
- 2009-11-17 CN CN2009202470701U patent/CN201557110U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025194A (en) * | 2010-10-09 | 2011-04-20 | 华北电力大学 | Power frequency communication synchronous detection method and device for industrial power grid |
| CN102025194B (en) * | 2010-10-09 | 2013-10-30 | 华北电力大学 | Power frequency communication synchronous detection method and device for industrial power grid |
| CN106160791A (en) * | 2015-03-30 | 2016-11-23 | 国家电网公司 | Three-phase multiple power lineman frequency communication means and system towards intelligent distribution network |
| CN105098985A (en) * | 2015-08-21 | 2015-11-25 | 光一科技股份有限公司 | System and method for identifying user change relationships in low-voltage power distribution based on power-frequency voltage distortion |
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| C14 | Grant of patent or utility model | ||
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| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140307 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140307 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140307 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160425 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Patentee after: State Grid Smart Grid Institute Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: China Electric Power Research Institute |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Patentee after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: China Electric Power Research Institute Patentee before: State Grid Smart Grid Institute |
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20100818 |