CN201976101U - Long-distance high speed power line wide-band communication device - Google Patents
Long-distance high speed power line wide-band communication device Download PDFInfo
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- CN201976101U CN201976101U CN2011201036229U CN201120103622U CN201976101U CN 201976101 U CN201976101 U CN 201976101U CN 2011201036229 U CN2011201036229 U CN 2011201036229U CN 201120103622 U CN201120103622 U CN 201120103622U CN 201976101 U CN201976101 U CN 201976101U
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Abstract
The utility model relates to a wide-band communication device, particularly to a long-distance high speed power line wide-band communication device based on a 35kV voltage class circuit, which is structurally characterized in that a signal transmission device of the long-distance high speed power line wide-band communication device is connected to a power line with a 35kV voltage class through a coupling device, a signal receiving device is a wireless receiving device, and the output end of the signal receiving device is connected with a data processing module. The utility model has the advantages as follows: signals are coupled with the power line in a wired manner, then wireless carrier signals are transmitted to space according to the characteristics of the high voltage power line, and finally wireless signals are received in a wireless manner. The communication device provided by utility model overcomes technical bias in the filed, expands the communication distance to be more than 8 kilometers successfully and effectively, and achieves primary relay 14.5 KM power line wide-band communication.
Description
Technical field
The utility model relates to a kind of broadband connections device, particularly a kind of remote high speed power line broadband connections device based on 35kV electric pressure circuit.
Background technology
Utilize high-voltage power line broadband connections technology can set up the special data channel of electric power system oneself, have convenient, fast, input cost is low, engineering construction simply waits outstanding advantage.High-voltage power line communication only needs the two ends on high-voltage power line that the high-voltage power line communication equipment is installed, and this has made that communication is convenient feasible on high-voltage power line.In the prior art, the remote high speed power line broadband connections device of employing be will device transmitting terminal and receiving terminal all with the high-voltage power line wired connection of communicating by letter, carry out wired transmission and wired reception.Yet the topmost problem of power line communication is a transmission line distributed capacitance over the ground, particularly the capacitance of 35kV line-to-ground is bigger, its influence to signal plays attenuation, while is along with the increase of distance, distributed capacitance constantly increases, decay increases, and can cause interruption in telecommunication, particularly the frequent 1MHZ-30MHZ frequency range of using of power communication carrier wave.Through calculating, decaying substantially in 2 kilometers on the 35kV circuit reaches 70dB.Therefore be subjected to the influence of high-tension line distributed capacitance, be difficult to realize longer-distance communication, prior art and practice show the communication means of being realized with original communicator, the communication distance farthest that can reach between adjacent two power communication devices has only 1.8km, press the distribution network of 10kV in only being applicable to, the communication distance on the power circuit of 35kV electric pressure is shorter.Such communication distance can't satisfy the demand of communication of power system development, adopt the low speed carrier transmission system can realize communication, but its transmission speed can not satisfy the communication of power system job requirement; If rent the transmission channel of operator, can bring very big hidden danger to safety in production again.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, and provides a kind of communication distance far away, the remote high speed power line broadband connections device that transmission speed is fast.
The utility model is realized by following approach:
Remote high speed power line broadband connections device, its structural feature is, include coffret, data processing module, sender unit and signal receiving device, coffret is the terminal connecting interface, it is connected with data processing module, the transmitting terminal of data processing module is connected with sender unit, and receiving terminal is connected with signal receiving device; Sender unit is connected to by coupling device on the power circuit of 35kV electric pressure, and signal receiving device is a kind of radio receiver, and its output is connected with data processing module.
The signal that data processing module sends sends on the power circuit of 35kV electric pressure by sender unit in wired mode, when power carrier transmits on the line, signal can be to spatial transmission under the high-voltage power line effect of electric field, therefore on the circuit signal receiving device in the high speed power line broadband connections device with the wireless receiving mode receive from the power line to the carrier signal of spatial transmission, the signal that receives is delivered to data processing module via radio receiver and is handled, and sends to terminal by coffret again.
In the prior art, because the power communication device all is installed in the place near power circuit, in traditional industry technical field, in the time of decades-long, those skilled in the art thinks that in-plant connection employing wired connection can allow signal propagate better, farther, therefore, power line carrier, PLC often all is to adopt wired mode to couple a signal on the power line to transmit, and with wired mode received signal, yet, on the power circuit of 35kV electric pressure, signal is subjected to the influence of high-frequency communication and line distribution capacitance decay, always can't reach desirable propagation distance.Technical staff of the present utility model has overcome this technology prejudice just, change the wired method of reseptance of the wired transmission of power line communication into wired transmission method of wireless reception, by a large amount of practices with studies have shown that, wireless receiving can overcome the problem that signal is decayed on high-voltage power line, make on the high-tension line communication distance between the adjacent two power communication devices can reach 14.5km and more than, because on the power circuit of 35kV electric pressure during transmission signals, carrier wave can be to spatial transmission under the electric field action of high-voltage power line, it is little to decay, propagation distance is far away, therefore on high-tension line, under the condition of wired transmission power carrier signal, the wireless receiving communication distance that can increase electric power greatly, thus realize remote high-speed power broadband connections.
The utility model can further be specially:
Sender unit includes power modulation module, power carrier sending module and the power carrier sampling module that connects in regular turn, wherein, the input of power modulation module is connected with data processing module, the power carrier sampling module is connected on the power circuit of 35kV electric pressure by coupling device
After the modulation of power modulation module, handle by the power carrier sending module, the power carrier sampling module power carrier of will taking a sample from the power carrier sending module, the power carrier with sampling is loaded on the power circuit of 35kV electric pressure by coupling device then.
Signal receiving device includes electric power demodulation module, carrier wave sampling module, wireless receiving module and the antenna that connects in regular turn, and the output of electric power demodulation module is connected with data processing module.
On the high-voltage power line under electric field action the signal to space divergence enter wireless receiving module via antenna, the carrier wave sampling module extracts signal carrier from wireless receiving module, deliver to the demodulation of electric power demodulation module then, send to data processing module at last and carry out analyzing and processing, send terminal again to.
Data processing module adopts orthogonal frequency division multiplexi, includes the OFDM process chip.
Orthodoxy Frequency Division Multiplex (being called for short OFDM) technology adopts multichannel arrowband orthogonal sub-carriers, transmits multichannel data simultaneously, and the symbol time of every road signal is longer, can avoid inter symbol interference.By the subcarrier that Dynamic Selection can be used, this technology can reduce the influence of narrow band interference and frequency valley point.
In addition, the OFDM technology can improve the power line network transmission quality, even if be subjected under the serious situation about disturbing at power distribution network, OFDM also can provide high bandwidth and guarantee bandwidth for transmission efficient, and adopts suitable error correcting technique can guarantee reliable transfer of data.The carrier wave of each subchannel is mutually orthogonal in ofdm system, so their frequency spectrum is overlapped, has so not only reduced the phase mutual interference between subcarrier, has improved the availability of frequency spectrum again simultaneously, can also resist persistent wave and disturb.But OFDM receives complicated, and the cost height is to the instantaneous interference sensitivity.The OFDM technology is mainly adopted in high speed power line communication.
Data processing module in the utility model is as follows to the processing method of Signal Message Address when sending data:
After receiving the packet of self terminal, at first judge whether default addresses for use of this packet, if default addresses for use is then preserved packet or returned this packet;
If this packet contains the address, judge then whether this address is this machine address, if then processing data packets and preparation are transmitted;
Data processing module in the utility model is as follows to the processing method of Signal Message Address when receiving data:
After receiving the wireless carrier signal from power line, at first whether the address in the judgment data bag is this machine address, if not, packet discard then;
If the address in the packet is this machine address, then is decrypted processing, and sends terminal to.
The utility model can also further be specially:
Coupling device or a kind of inductive coupler, or a kind of capacity coupler.
Find according at present domestic electrical network framework and by a large amount of field tests, adopt inductance coupling high mode sampled signal more satisfactory, adopt the capacitive coupling sampled signal more satisfactory for aerial cable for underground cable.Because high-tension line of the present utility model generally is an aerial cable, so preferably select capacity coupled sampling mode.
In addition, coupling device has also played safe buffer action, adopts inductive coupler for buried high-tension cable, inductive coupler is to be coupling on the insulated cable, directly directly do not contact with power line, obtain high-frequency signal by induction, inductive coupler is provided with the dead ground point simultaneously.Adopt the high frequency capacitance coupler for built on stilts high-tension cable, from the low-pressure end number of winning the confidence, capacity coupler is equipped with reliable ground connection and lightning-protecting engineering, and is safe and reliable.
In sum, the utility model provides a kind of remote high speed power line broadband connections device, it is based on the power circuit of 35kV electric pressure, this broadband power line communication device is installed on the power circuit, couple a signal on the power line in wired mode, then according to the high-voltage power line characteristic to the spatial transmission wireless carrier signal, receive wireless signal at last wirelessly.Technical staff of the present utility model has overcome the technology prejudice of this area, employing is with the thought of power line as antenna, send direct electrification line, receive the method that adopts antenna and collect the wireless signal that the power line antenna is provided, the success, effectively communication distance is expanded to more than 8 kilometers, realized the broadband power line communication of one-level relaying 14.5KM.
Description of drawings
Figure 1 shows that the principle block diagram of remote high speed power line broadband connections device described in the utility model;
Figure 2 shows that described in the utility model based on system's connection diagram of broadband power line communication device on power line;
Below in conjunction with accompanying drawing the utility model is described further.
Embodiment
Most preferred embodiment:
With reference to accompanying drawing 1, remote high speed power line broadband connections device includes coffret, data processing module, sender unit and signal receiving device, and coffret is the terminal connecting interface, and it is connected with data processing module;
The sender unit of power communication device includes power modulation module, power carrier sending module and the power carrier sampling module that connects in regular turn, wherein, the input of power modulation module is connected with data processing module, the power carrier sampling module is connected on the power circuit of 35kV electric pressure by coupling device
From the signal of data processing module after the modulation of power modulation module, handle by the power carrier sending module, the power carrier sampling module power carrier of will from the power carrier sending module, taking a sample, the power carrier with sampling is loaded on the power circuit of 35kV electric pressure by a kind of capacity coupler then;
Signal receiving device is a kind of radio receiver, includes the electric power demodulation module, carrier wave sampling module, wireless receiving module and the antenna that connect in regular turn, and the output of electric power demodulation module is connected with data processing module;
After power carrier is sent to and transmits on the high-tension line, under the high-voltage power line effect of electric field to spatial transmission, signal receiving device in the power communication device on the circuit by the wireless receiving mode receive from the power line to the carrier signal of spatial transmission, signal enters wireless receiving module via antenna, the carrier wave sampling module extracts signal carrier from wireless receiving module, deliver to the demodulation of electric power demodulation module then, handle by data processing module at last, send to terminal through coffret again.
Wherein the acp chip of the data processing module of power communication device adopts the power line communication chip of American I NTELLON 85M of company and 200M, and this chip adopts the OFDM modulation technique, is the advanced power line communication chip in the present world.For the access network of high transfer rate, multi-carrier OFDM (OFDM) technology is considered to suitable technique scheme the most.OFDM modulates data with a plurality of mutually orthogonal carrier waves, and serial data stream is transformed to parallel processing.It has the high channel utilance near shannon limit; And can effectively resist multipath effect, solve the intersymbol interference problem, also possess the ability of stronger anti-bursty interference; In addition, on channel allocation, OFDM also provides the possibility of flexible operating, is evaded the frequency band of deep fading in the communication bandwidth; The OFDM technology is widely used in high speed PLC.Orthogonal frequency division multiplexer adopts multichannel arrowband orthogonal sub-carriers, transmits multichannel data simultaneously, and the symbol time of every road signal is longer, can avoid inter symbol interference.By the subcarrier that Dynamic Selection can be used, this technology can reduce the influence of narrow band interference and frequency valley point.
The OFDM technology can also improve the power line network transmission quality, even if be subjected under the serious situation about disturbing at power distribution network, OFDM can provide high bandwidth and guarantee bandwidth for transmission efficient, and adopts suitable error correcting technique can guarantee reliable transfer of data.The carrier wave of each subchannel is mutually orthogonal in ofdm system, so their frequency spectrum is overlapped, has so not only reduced the phase mutual interference between subcarrier, has improved the availability of frequency spectrum again simultaneously, can also resist persistent wave and disturb.
The OFDM technology is to adopt a kind of discontinuous multi-tone technology, and a large amount of signals that will be called as in the different frequency of carrier wave are merged into single signal, transmit thereby finish signal.Because this technology has under noise jamming the ability that transmits signal, therefore usually can be used in and be subjected to easily in the relatively poor transmission medium of external interference or opposing external interference ability.
The signal receiving device receiving port of power communication device directly connects antenna, can be according to the wireless communication designs of standard.
With reference to accompanying drawing 2, below further specify communicator described in the utility model with the power line transmission system:
1, a kind of power circuit of 35kV electric pressure is provided, includes A transformer station and B transformer station;
2, provide a kind of aforesaid high speed power line broadband connections device as high-tension electricity communication equipment (electric power bridge storage), in the modulation of passing through between A transformer station and the B transformer station between high-tension electricity bridge storage realization ethernet signal and the carrier signal.
3, high voltage capacitor coupling device adopts electric capacity coupling device, and the function of high-tension electricity communication equipment is that ethernet signal is modulated into carrier signal, and the function of coupler is exactly that carrier signal is loaded into connection device on the electrical network so.
4, the high-tension electricity communication equipment is installed in A transformer station and B transformer station, its installation method is that the WAN mouth of equipment connects with the powerline network on upper strata, the PLC mouth adopts the capacity coupler of coaxial cable and high pressure to link, and capacity coupler is connected with high-voltage fence.The civil power that the power supply of high-tension electricity communication equipment can cause in the transformer station gets final product.The WAN mouth of high-tension electricity communication equipment can adopt optical fiber and power telecom network (terminal local area network (LAN)) interconnected.
5, the 35KV circuit does not have ground wire and center line, so adopt B as imaginary center line; Because the circuit distance is longer, transmission and receiving lines separate, send signal and will carry out the wideband amplification, signal sends the transmission loop and adopts the A-B phase, signal receives the wireless transmission loop and adopts wireless, each signaling point need be installed three carrier coupling capacitors, and wherein B joins carrier coupling capacitor ground connection as virtual center point, and A, C join coupling device as transmitting line.
6, capacity coupler is installed in the place of transformer station's outlet point, relaying position overhead wire.
It is same as the prior art that the utility model is not stated part.
Claims (5)
1. remote high speed power line broadband connections device, it is characterized in that, include coffret, data processing module, sender unit and signal receiving device, coffret is the terminal connecting interface, it is connected with data processing module, the transmitting terminal of data processing module is connected with sender unit, and receiving terminal is connected with signal receiving device; The sender unit of power communication device is connected to by coupling device on the power circuit of 35kV electric pressure, and signal receiving device is a kind of radio receiver, and its output is connected with data processing module.
2. remote high speed power line broadband connections device according to claim 1, it is characterized in that, sender unit includes power modulation module, power carrier sending module and the power carrier sampling module that connects in regular turn, wherein, the input of power modulation module is connected with data processing module, and the power carrier sampling module is connected on the power circuit of 35kV electric pressure by coupling device.
3. remote high speed power line broadband connections device according to claim 1, it is characterized in that, signal receiving device includes electric power demodulation module, carrier wave sampling module, wireless receiving module and the antenna that connects in regular turn, and the output of electric power demodulation module is connected with data processing module.
4. remote high speed power line broadband connections device according to claim 1 is characterized in that data processing module includes the OFDM process chip.
5. remote high speed power line broadband connections device according to claim 1 is characterized in that coupling device or a kind of inductive coupler, or a kind of capacity coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201036229U CN201976101U (en) | 2011-04-11 | 2011-04-11 | Long-distance high speed power line wide-band communication device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201036229U CN201976101U (en) | 2011-04-11 | 2011-04-11 | Long-distance high speed power line wide-band communication device |
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| CN201976101U true CN201976101U (en) | 2011-09-14 |
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| CN2011201036229U Expired - Fee Related CN201976101U (en) | 2011-04-11 | 2011-04-11 | Long-distance high speed power line wide-band communication device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012139489A1 (en) * | 2011-04-11 | 2012-10-18 | 福建省电力有限公司 | Long-distance high-speed broadband power line communication device |
| WO2012139491A1 (en) * | 2011-04-11 | 2012-10-18 | 福建省电力有限公司 | Long-distance high-speed broadband power line communication method |
| CN104184493A (en) * | 2014-08-13 | 2014-12-03 | 国家电网公司 | System for ensuring electric power line communication during breakdown or maintenance state of electric power circuit |
| CN107404335A (en) * | 2017-07-25 | 2017-11-28 | 国网福建省电力有限公司 | A kind of method that power circuit ensures power line communication in failure and inspecting state |
-
2011
- 2011-04-11 CN CN2011201036229U patent/CN201976101U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012139489A1 (en) * | 2011-04-11 | 2012-10-18 | 福建省电力有限公司 | Long-distance high-speed broadband power line communication device |
| WO2012139491A1 (en) * | 2011-04-11 | 2012-10-18 | 福建省电力有限公司 | Long-distance high-speed broadband power line communication method |
| CN104184493A (en) * | 2014-08-13 | 2014-12-03 | 国家电网公司 | System for ensuring electric power line communication during breakdown or maintenance state of electric power circuit |
| CN107404335A (en) * | 2017-07-25 | 2017-11-28 | 国网福建省电力有限公司 | A kind of method that power circuit ensures power line communication in failure and inspecting state |
| CN107404335B (en) * | 2017-07-25 | 2020-12-04 | 国网福建省电力有限公司 | Method for guaranteeing power line communication in fault and maintenance states of power line |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 352000 No. 48, Hefeng Road, Jiaocheng District, Fujian, Ningde Patentee after: Ningde Electric Power Bureau, Fujian Electric Power Co., Ltd. Patentee after: Fujian billion Kun communications Limited by Share Ltd Address before: 352000 No. 48, Hefeng Road, Jiaocheng District, Fujian, Ningde Patentee before: Ningde Electric Power Bureau, Fujian Electric Power Co., Ltd. Patentee before: Fujian Great Power PLC Equipment Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20200411 |