CN102946259B - Carrier wave communication system based on electric power line and carrier wave communication method - Google Patents
Carrier wave communication system based on electric power line and carrier wave communication method Download PDFInfo
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- CN102946259B CN102946259B CN201210396735.1A CN201210396735A CN102946259B CN 102946259 B CN102946259 B CN 102946259B CN 201210396735 A CN201210396735 A CN 201210396735A CN 102946259 B CN102946259 B CN 102946259B
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Abstract
The invention provides a carrier wave communication system based on an electric power line, which comprises a signal generator arranged at the first end of the electric power line for generating a communication signal by a reactive current superposed to the electric power line in the condition that the electric power line is in an alternating supply state; a signal receiving device arranged at the second end of the electric power line for detecting the communication signal to obtain corresponding communication information. The invention further provides a carrier wave communication method based on the electric power line. Through the technical scheme provided by the invention, reactive current carrier wave communication is adopted in the condition that the electric power line is in the alternating supply state. The carrier wave communication is not limited by loads, safe and reliable, and the transmission distance is long and the cost is low.
Description
Technical field
The present invention relates to power line carrier communication technique field, in particular to a kind of carrier communication system based on power circuit and a kind of carrier communication method based on power circuit.
Background technology
At present, be applied to method many employings power line carrier mode of power cable communication, adopt in power circuit and exchange 50Hz voltage signal as carrier wave, superpose the communication transfer of effective modulation signal.But such scheme is not suitable for the public lighting circuit of common transformer, or across the communication between transformer bay circuit, and its transmission range limits by load, and signal is easily absorbed, and effective propagation path is generally and is less than 500 meters, otherwise needs to install repeater additional, and cost increases.
Therefore, need a kind of carrier wave communication technology based on power circuit newly, can when power circuit carry out Alternating Current Power Supply, adopt reactive current carrier communication, do not limit by load, safe and reliable, long transmission distance, cost is low.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of carrier wave communication technology based on power circuit newly, can when power circuit carries out Alternating Current Power Supply, adopt reactive current carrier communication, do not limit by load, safe and reliable, long transmission distance, cost is low.
In view of this, the present invention proposes a kind of carrier communication system based on power circuit, comprise: signal generation apparatus, be arranged on the first end on described power circuit, for when described power circuit is in Alternating Current Power Supply state, utilize the reactive current be superimposed in described power circuit, generate communication signal; Signal receiving device, is arranged on the second end on described power circuit, for detecting described communication signal, to obtain corresponding communication information.
In this technical scheme, reactive current is used for corresponding generation reactive power, reactive power is corresponding with active power, wherein, active power is used for powering to the power consumption equipment of access power circuit, reactive power is then due to the capacitor in circuit, the dephased current that the devices such as inductor cause produces, and according to the requirement (requirement is the bigger the better) for power factor in actual power circuit, need Reactive Power Control in scope little as far as possible, thus the percentage of total current content is accounted for by electric power cable load spontaneous reactive current component very low, the reactive current component then making technical scheme of the present invention superpose more easily is identified, there is very high signal to noise ratio, and the opposing noise immune of current signal is strong, be not easy by extraneous various electromagnetic interference, there is farther transmission range, and can not due to across transformer, line load change, circuit distance (as being greater than 500 meters) and affect Signal transmissions, this programme does not have special requirement to power circuit simultaneously, do not need to add expensive equipment, there is high security and reliability, low cost.
In technique scheme, preferably, described signal generation apparatus comprises: current generating unit, for generating the current signal comprising communication information; Phase shift processing unit, for carrying out phase shift process to described current signal, makes the electric current on described current signal and described power circuit produce the phase difference of preset range; Signal averaging unit, for being superimposed to the reactive current obtained after described phase shift process in the electric current on described power circuit.
In this technical scheme, after communication information being contained in current signal, by carrying out phase shift to this current signal, thus making it to be applied to after in power circuit, transmitting as reactive current.
In technique scheme, preferably, described phase shift processing unit comprises: capacitor, inductor and/or RLC combinational circuit.Certainly, it should be appreciated by those skilled in the art, other any components and parts, circuit, equipment etc. that can carry out phase place change to electric current, obviously also can be applied to this and produce identical technique effect.
In technique scheme, preferably, described current generating unit comprises: pulse generation subelement, for generating current pulse signal, to comprise described communication information.
In this technical scheme, utilize current pulse signal to express communication information, such as representing 1 when pulse signal being detected, when pulse signal not detected, representing 0, thus realize information coding and transmission.
In technique scheme, preferably, described pulse generation subelement comprises: relay, controllable silicon and/or field effect transistor.Certainly, it should be appreciated by those skilled in the art, other any components and parts, circuit, equipment etc. that can carry out switch control rule to electric current, obviously also can be applied to this and produce identical technique effect.
In technique scheme, preferably, also comprise: Data Analysis Services unit, for judging whether the communication information obtained mates with presupposed information, if do not mate, then sends data analysis request, to carry out analyzing and processing to the communication information obtained.
In this technical scheme, if power circuit is normal, then according to preset rules, fixing communication information should be received, thus when communication information occurs abnormal, then illustrate that power circuit may occur unusual condition and need to process in time.
According to another aspect of the invention, also proposed a kind of carrier communication method based on power circuit, comprise: step 202, be arranged on the signal generation apparatus of the first end on described power circuit, when described power circuit is in Alternating Current Power Supply state, utilize the reactive current be superimposed in described power circuit, generate communication signal; Step 204, the signal receiving device being arranged on the second end of described power circuit detects described communication signal, to obtain corresponding communication information.
In this technical scheme, reactive current is used for corresponding generation reactive power, reactive power is corresponding with active power, wherein, active power is used for powering to the power consumption equipment of access power circuit, reactive power is then due to the capacitor in circuit, the dephased current that the devices such as inductor cause produces, and according to the requirement (requirement is the bigger the better) for power factor in actual power circuit, need Reactive Power Control in scope little as far as possible, thus the percentage of total current content is accounted for by electric power cable load spontaneous reactive current component very low, the reactive current component then making technical scheme of the present invention superpose easily is identified, there is very high signal to noise ratio, and the opposing noise immune of current signal is strong, be not easy by extraneous various electromagnetic interference, there is farther transmission range, and can not due to across transformer, line load change, circuit distance (as being greater than 500 meters) and affect Signal transmissions, this programme does not have special requirement to power circuit simultaneously, do not need to add expensive equipment, there is high security and reliability, low cost.
In technique scheme, preferably, described step 202 comprises: described signal generation apparatus generates the current signal comprising communication information; Phase shift process is carried out to described current signal, makes the electric current on described current signal and described power circuit produce the phase difference of preset range; The reactive current obtained after described phase shift process is superimposed in the electric current on described power circuit.
In this technical scheme, after communication information being contained in current signal, by carrying out phase shift to this current signal, thus making it to be applied to after in power circuit, transmitting as reactive current.
In technique scheme, preferably, described step 202 comprises: described signal generation apparatus generates described communication information by current pulse signal.
In this technical scheme, utilize current pulse signal to express communication information, such as representing 1 when pulse signal being detected, when pulse signal not detected, representing 0, thus realize information coding and transmission.
In technique scheme, preferably, described step 204 also comprises: judge whether the communication information obtained mates with presupposed information, if do not mate, then sends data analysis request, to carry out analyzing and processing to the communication information obtained.
In this technical scheme, if power circuit is normal, then according to preset rules, fixing communication information should be received, thus when communication information occurs abnormal, then illustrate that power circuit may occur unusual condition and need to process in time.
By above technical scheme, can when power circuit carry out Alternating Current Power Supply, adopt reactive current carrier communication, do not limit by load, safe and reliable, long transmission distance, cost is low.
Accompanying drawing explanation
Fig. 1 shows according to an embodiment of the invention based on the block diagram of the carrier communication system of power circuit;
Fig. 2 shows according to an embodiment of the invention based on the flow chart of the carrier communication method of power circuit;
Fig. 3 shows the schematic diagram realizing carrier communication according to an embodiment of the invention based on power circuit.
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following public specific embodiment.
Fig. 1 shows according to an embodiment of the invention based on the block diagram of the carrier communication system of power circuit.
As shown in Figure 1, according to an embodiment of the invention based on the carrier communication system 100 of power circuit, comprise: signal generation apparatus 102, be arranged on the first end on described power circuit, for when described power circuit is in Alternating Current Power Supply state, utilize the reactive current be superimposed in described power circuit, generate communication signal; Signal receiving device 104, is arranged on the second end on described power circuit, for detecting described communication signal, to obtain corresponding communication information.
In this technical scheme, reactive current is used for corresponding generation reactive power, reactive power is corresponding with active power, wherein, active power is used for powering to the power consumption equipment of access power circuit, reactive power is then due to the capacitor in circuit, the dephased current that the devices such as inductor cause produces, and according to the requirement (requirement is the bigger the better) for power factor in actual power circuit, need Reactive Power Control in scope little as far as possible, thus the percentage of total current content is accounted for by electric power cable load spontaneous reactive current component very low, the reactive current component then making technical scheme of the present invention superpose easily is identified, there is very high signal to noise ratio, and the opposing noise immune of current signal is strong, be not easy by extraneous various electromagnetic interference, there is farther transmission range, and can not due to across transformer, line load change, circuit distance (as being greater than 500 meters) and affect Signal transmissions, this programme does not have special requirement to power circuit simultaneously, do not need to add expensive equipment, there is high security and reliability, low cost.
In technique scheme, preferably, described signal generation apparatus 102 comprises: current generating unit 1022, for generating the current signal comprising communication information; Phase shift processing unit 1024, for carrying out phase shift process to described current signal, makes the electric current on described current signal and described power circuit produce the phase difference of preset range; Signal averaging unit 1026, for being superimposed to the reactive current obtained after described phase shift process in the electric current on described power circuit.
In this technical scheme, after communication information being contained in current signal, by carrying out phase shift to this current signal, thus making it to be applied to after in power circuit, transmitting as reactive current.
In technique scheme, preferably, described phase shift processing unit 1024 comprises: capacitor, inductor and/or RLC combinational circuit.Certainly, it should be appreciated by those skilled in the art, other any components and parts, circuit, equipment etc. that can carry out phase place change to electric current, obviously also can be applied to this and produce identical technique effect.
In technique scheme, preferably, described current generating unit 1022 comprises: pulse generation subelement 1022A, for generating current pulse signal, to comprise described communication information.
In this technical scheme, utilize current pulse signal to express communication information, such as representing 1 when pulse signal being detected, when pulse signal not detected, representing 0, thus realize information coding and transmission.
In technique scheme, preferably, described pulse generation subelement 1022A comprises: relay, controllable silicon and/or field effect transistor.Certainly, it should be appreciated by those skilled in the art, other any components and parts, circuit, equipment etc. that can carry out switch control rule to electric current, obviously also can be applied to this and produce identical technique effect.
In technique scheme, preferably, also comprise: Data Analysis Services unit 106, for judging whether the communication information obtained mates with presupposed information, if do not mate, then sends data analysis request, to carry out analyzing and processing to the communication information obtained.
In this technical scheme, if power circuit is normal, then according to preset rules, fixing communication information should be received, thus when communication information occurs abnormal, then illustrate that power circuit may occur unusual condition and need to process in time.
Fig. 2 shows according to an embodiment of the invention based on the flow chart of the carrier communication method of power circuit.
As shown in Figure 2, according to an embodiment of the invention based on the carrier communication method of power circuit, comprise: step 202, be arranged on the signal generation apparatus of the first end on described power circuit, when described power circuit is in Alternating Current Power Supply state, utilize the reactive current be superimposed in described power circuit, generate communication signal; Step 204, the signal receiving device being arranged on the second end of described power circuit detects described communication signal, to obtain corresponding communication information.
In this technical scheme, reactive current is used for corresponding generation reactive power, reactive power is corresponding with active power, wherein, active power is used for powering to the power consumption equipment of access power circuit, reactive power is then due to the capacitor in circuit, the dephased current that the devices such as inductor cause produces, and according to the requirement (requirement is the bigger the better) for power factor in actual power circuit, need Reactive Power Control in scope little as far as possible, thus the percentage of total current content is accounted for by electric power cable load spontaneous reactive current component very low, the reactive current component then making technical scheme of the present invention superpose easily is identified, there is very high signal to noise ratio, and the opposing noise immune of current signal is strong, be not easy by extraneous various electromagnetic interference, there is farther transmission range, and can not due to across transformer, line load change, circuit distance (as being greater than 500 meters) and affect Signal transmissions, this programme does not have special requirement to power circuit simultaneously, do not need to add expensive equipment, there is high security and reliability, low cost.
In technique scheme, preferably, described step 202 comprises: described signal generation apparatus generates the current signal comprising communication information; Phase shift process is carried out to described current signal, makes the electric current on described current signal and described power circuit produce the phase difference of preset range; The reactive current obtained after described phase shift process is superimposed in the electric current on described power circuit.
In this technical scheme, after communication information being contained in current signal, by carrying out phase shift to this current signal, thus making it to be applied to after in power circuit, transmitting as reactive current.
In technique scheme, preferably, described step 202 comprises: described signal generation apparatus generates described communication information by current pulse signal.
In this technical scheme, utilize current pulse signal to express communication information, such as representing 1 when pulse signal being detected, when pulse signal not detected, representing 0, thus realize information coding and transmission.
In technique scheme, preferably, described step 204 also comprises: judge whether the communication information obtained mates with presupposed information, if do not mate, then sends data analysis request, to carry out analyzing and processing to the communication information obtained.
In this technical scheme, if power circuit is normal, then according to preset rules, fixing communication information should be received, thus when communication information occurs abnormal, then illustrate that power circuit may occur unusual condition and need to process in time.
Fig. 3 shows the schematic diagram realizing carrier communication according to an embodiment of the invention based on power circuit.
As shown in Figure 3, in an embodiment according to the present invention, when carrying out carrier communication based on power circuit 500, any two nodes respectively on power circuit 500 can be arranged generating means and the receiving system of communication signal, particularly, than distal tip signal generation device 300 and front end signal checkout gear 400 as illustrated in the drawing, wherein, communication signal is sent, to realize the transmission of communication information by distal tip signal generation device 300 forward end signal supervisory instrument 400.
In distal tip signal generation device 300, include terminal controller 302, pulse signal generator 304 and reactive-current generator 306, wherein, first by terminal controller 302 control wave generator 304 generation current pulse signal, the communication information that specifically can send as required comes generation and the cut-off of control wave.Then by reactive-current generator 306, the current pulse signal that pulse signal generator 304 produces is superimposed in the electric current on power circuit 500.
Particularly, reactive-current generator 306 carries out phase shift process to the current pulse signal from pulse signal generator 304, the voltage signal in itself and power circuit 500 is made to produce the phase difference of preset range, usually can between positive and negative 90 °, and more close+90 ° or-90 °, more easily be detected, thus reach better communication effect.
In front end signal checkout gear 400, comprise front controller 402 and electric energy detection chip 404, wherein, the current signal that front controller 402 controls in electric energy detection chip 404 pairs of power circuits 500 detects, to parse wherein reactive current component, and transfer in front controller 402 to make signal resolution.
In sum, the distal tip signal generation device 300 that power circuit 500 is arranged and front end signal checkout gear 400, by producing reactive current pulse signal, thus realize the communication process based on power circuit 500.Owing to adopting reactive current as the carrier wave of communication signal, and it is very low to account for the percentage of total current content by electric power cable load spontaneous reactive current component, the reactive current component then making technical scheme of the present invention superpose easily is identified, and has very high signal to noise ratio.In addition, owing to adopting current signal transfer, opposing noise immune is strong, is not easy, by extraneous various electromagnetic interference, thus to have very long transmission range, be generally not less than 2km, and can realize across transformer work.
More than be described with reference to the accompanying drawings technical scheme of the present invention, consider in correlation technique and cannot realize across transformer based on the carrier communication of power circuit, and transmission range limited by load, signal is easily absorbed, and cost is high.Therefore, the invention provides a kind of carrier communication system based on power circuit and a kind of carrier communication method based on power circuit, can when power circuit carries out Alternating Current Power Supply, adopt reactive current carrier communication, do not limit by load, safe and reliable, long transmission distance, cost is low.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. based on a carrier communication system for power circuit, it is characterized in that, comprising:
Signal generation apparatus, is arranged on the first end on described power circuit, for when described power circuit is in Alternating Current Power Supply state, generates reactive current pulse signal as communication signal; Signal supervisory instrument, is arranged on the second end on described power circuit, for detecting the communication signal on described power circuit, to obtain corresponding communication information;
Described signal generation apparatus comprises: current generating unit (1022), phase shift processing unit (1024) and Signal averaging unit (1026);
Described current generating unit (1022) is for generating the current signal comprising communication information;
Described phase shift processing unit (1024), for carrying out phase shift process to described current signal, makes the electric current on described current signal and described power circuit produce the phase difference of preset range, produces reactive current pulse signal;
Described Signal averaging unit (1026), for being superimposed to the electric current on described power circuit by the described reactive current pulse signal obtained after described phase shift process;
Described signal supervisory instrument comprises signal receiving device (104) and Data Analysis Services unit (106);
Described signal receiving device (104) is for detecting the described communication signal on described power circuit;
Described Data Analysis Services unit (106) is for parsing the reactive current component corresponding to described reactive current pulse signal in described communication signal.
2. a system as claimed in claim 1, wherein, described current generating unit comprises pulse generation subelement.
3. the carrier communication system based on power circuit according to claim 1, is characterized in that, described phase shift processing unit comprises:
Capacitor, inductor and/or RLC combinational circuit.
4. the carrier communication system based on power circuit according to claim 2, is characterized in that, described pulse generation subelement comprises:
Relay, controllable silicon and/or field effect transistor.
5. a system as claimed in claim 1, comprising:
Data Analysis Services unit, for judging whether analysis result mates with presupposed information, if analysis result does not mate with presupposed information, then sends data analysis request, to carry out analyzing and processing to the communication information obtained.
6. adopt a carrier communication method for the power circuit of system according to claim 1, it is characterized in that, comprising:
Step 202, is arranged on the signal generation apparatus of the first end on described power circuit, and it produces the reactive current pulse signal as reactive current component, and described reactive current pulse signal is superimposed upon on the electric current of described power circuit, as communication signal;
Step 204, is arranged on the signal receiving device of the second end on described power circuit, detects described communication signal, to obtain corresponding communication information.
7. a method as claimed in claim 6, the communication signal also comprised obtaining is resolved, and judges whether analysis result mates with presupposed information, if do not mate, then sends data analysis request, to carry out analyzing and processing to the communication information obtained.
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| CN201210396735.1A CN102946259B (en) | 2012-10-18 | 2012-10-18 | Carrier wave communication system based on electric power line and carrier wave communication method |
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| CN201210396735.1A CN102946259B (en) | 2012-10-18 | 2012-10-18 | Carrier wave communication system based on electric power line and carrier wave communication method |
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| CN102946259B true CN102946259B (en) | 2015-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103957033A (en) | 2014-05-12 | 2014-07-30 | 东南大学 | Communication-line-free data transmission method between power electronic devices based on composite modulation |
| CN105719470B (en) * | 2016-02-02 | 2019-04-19 | 厦门中天微电子科技有限公司 | A kind of method that power line carrier centralized meter-reading system and the system automatically confirm that node platform area ownership |
| CN107994926B (en) * | 2017-12-29 | 2024-06-07 | 欧普照明股份有限公司 | Circuit and communication system for realizing signal transmission based on power carrier |
| CN110290085B (en) * | 2019-08-14 | 2020-05-29 | 中国人民解放军国防科技大学 | Data ferrying method and system based on network isolation condition |
| CN112255471A (en) * | 2020-06-05 | 2021-01-22 | 浙江华云信息科技有限公司 | Equipment fault uploading technology under application of reactive current pulse signals |
| CN112003802B (en) * | 2020-06-19 | 2023-09-19 | 浙江华云信息科技有限公司 | Coding system and method using reactive current pulse |
| CN111812402A (en) * | 2020-06-29 | 2020-10-23 | 北京智芯微电子科技有限公司 | Intelligent electric meter and automatic connection method of circuit breaker and intelligent electric meter |
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| CN102487299A (en) * | 2010-12-03 | 2012-06-06 | 华北电力科学研究院有限责任公司 | Method and device for simulating noise of power line carrier channel |
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| EP2248250A4 (en) * | 2008-02-12 | 2016-06-01 | Enphase Energy Inc | Method and apparatus for distributed var compensation |
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| CN101251951A (en) * | 2008-04-03 | 2008-08-27 | 中国电力科学研究院 | Power distribution network industrial frequency communicating method and system |
| CN101834633A (en) * | 2009-03-09 | 2010-09-15 | 江苏林洋电子股份有限公司 | Power line carrier wave meter based on tri-state impulse displacement phase modulation and communication method |
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