CN107404335B - Method for guaranteeing power line communication in fault and maintenance states of power line - Google Patents
Method for guaranteeing power line communication in fault and maintenance states of power line Download PDFInfo
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- CN107404335B CN107404335B CN201710612096.0A CN201710612096A CN107404335B CN 107404335 B CN107404335 B CN 107404335B CN 201710612096 A CN201710612096 A CN 201710612096A CN 107404335 B CN107404335 B CN 107404335B
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- 238000004891 communication Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012423 maintenance Methods 0.000 title claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention relates to a method for ensuring power line communication when a power line is in a fault and maintenance state, which comprises the steps of providing a power line to be detected for power line communication and a communication module arranged on the power line to be detected; the communication module comprises a coupler coupled with the power line to be detected, a remote power line broadband communication device and a computer terminal; the computer terminal acquires a to-be-detected power signal of the to-be-detected power line through a coupler, compares the to-be-detected power signal with a reference power signal prestored in the computer terminal, and judges the current operation state of the to-be-detected power line; the computer terminal adjusts power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current operation state of the power line to be detected, and injects the signal into the power line to be detected, so as to ensure power line communication of the power line to be detected.
Description
Technical Field
The invention relates to a method for guaranteeing power line communication in a fault and maintenance state of a power line.
Background
At present, the broadband power line communication (BPL) technology in china is more and more emphasized, and network services are provided for users quickly and at low cost, and particularly, the BPL technology is undoubtedly a good choice in remote areas. However, the existing power line communication technology does not have much deep research on communication guarantee methods when a line is in a fault and overhaul state, while a medium-voltage power line is generally in a remote area, the line is easy to cause faults due to the influence of various natural environments, and a power department also needs to overhaul the line regularly, so that the method for guaranteeing the power line communication when the line is in the overhaul or fault state is researched, and a communication system deduced through a series of experimental researches can be widely applied to the field of medium-voltage and high-voltage power line hybrid broadband communication. The research result of the project breaks through the bottleneck of the prior art and creates a new direction for the development of the power line broadband communication technology. Meanwhile, the new knowledge of people on power line carrier communication can be changed and deepened. Develop new application. However, the prior art focuses on solving the problem of broadband power line communication, and their main purpose is to solve the technical problems of line noise, channel impedance, signal attenuation, signal wave blocking, lightning protection measures, and working power supply of outdoor equipment in power line communication. The communication guarantee method for the power line in the maintenance and fault states is not solved.
Disclosure of Invention
The invention aims to provide a method for ensuring power line communication in fault and maintenance states of a power line, so as to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for guaranteeing power line communication in fault and maintenance states of a power line provides a power line to be detected for power line communication and a communication module arranged on the power line to be detected; the communication module comprises a coupler coupled with the power line to be detected, a remote power line broadband communication device connected with the coupler and a computer terminal respectively connected with the coupler and the remote power line broadband communication device; the computer terminal acquires a to-be-detected power signal of the to-be-detected power line through the coupler, compares the to-be-detected power signal with a reference power signal prestored in the computer terminal, and judges the current running state of the to-be-detected power line; and the computer terminal adjusts the power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current running state of the power line to be detected, and injects the signal into the power line to be detected.
In an embodiment of the present invention, the coupler includes a coupling capacitor, a coupling magnetic ring, and a lightning arrester.
In an embodiment of the present invention, the long-distance power line broadband communication device includes a signal coupling unit, a signal sending unit, a signal receiving unit, a data processing unit, and a transmission interface; the signal transmitting unit and the signal receiving unit are connected with the signal coupling unit; the signal sending unit and the signal receiving unit are also connected with the data processing unit; the data processing unit is also connected with the transmission interface; the signal sending unit comprises a power modulation module and a power carrier sending module; the signal receiving unit comprises a power carrier sampling module and a power demodulation module.
In an embodiment of the present invention, the power signal to be detected includes a voltage and an impedance of the power line to be detected.
In an embodiment of the present invention, the current operating state includes: normal operation, fault operation and overhaul operation.
In an embodiment of the present invention, when the current operation state is normal operation, the long-distance power line broadband communication device transmits power by using a first power carrier; and when the current running state is maintenance running, the remote power line broadband communication device transmits power by adopting a second power carrier.
In an embodiment of the present invention, when the current operation state is a fault operation, the computer terminal compares the currently acquired power signal to be detected with a fault reference power signal prestored in the computer terminal, and determines a current fault level; and the computer terminal adjusts the power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current fault grade of the power line to be detected, and injects the signal into the power line to be detected.
In an embodiment of the present invention, the fault reference power signal includes a voltage and an impedance of a power line to be detected; the current fault classes include short circuits, grounding, and wire breakage.
In an embodiment of the present invention, when the current fault level is a short circuit, the remote power line broadband communication device transmits power by using a third power carrier; when the current fault level is short circuit grounding, the remote power line broadband communication device transmits power by adopting a fourth power carrier; and when the current fault level is disconnection, the long-distance power line broadband communication device adopts a fifth power line carrier to transmit power.
In an embodiment of the present invention, the present invention further comprises an external terminal connected to the computer terminal; the external terminal comprises a camera unit, a voice unit, a GPS positioning unit, an intelligent ammeter or an audible and visual alarm unit.
Compared with the prior art, the invention has the following beneficial effects: the invention provides a method for ensuring power line communication in fault and overhaul states of a power line, which ensures normal power line communication by adjusting the injection power of a power communication signal by utilizing the characteristic that the fault or the overhaul of the power line is generally the disconnection of a jumper and a physical line cannot be disconnected, and ensures normal communication in the fault or the overhaul state of the power line besides the normal state.
Drawings
Fig. 1 is a system diagram illustrating a method for securing power line communication in a fault and maintenance state of a power line according to the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
The invention provides a method for ensuring power line communication when a power line is in a fault and overhaul state, which comprises the steps of providing a power line to be detected for power line communication and a communication module arranged on the power line to be detected; the communication module comprises a coupler coupled with the power line to be detected, a remote power line broadband communication device connected with the coupler and a computer terminal respectively connected with the coupler and the remote power line broadband communication device; the computer terminal acquires a to-be-detected power signal of the to-be-detected power line through the coupler, compares the to-be-detected power signal with a reference power signal prestored in the computer terminal, and judges the current operation state of the to-be-detected power line; and the computer terminal adjusts the power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current running state of the power line to be detected, and injects the signal into the power line to be detected. The other communication module arranged on the power line to be detected comprises a coupler coupled with the power line to be detected, a remote power line broadband communication device connected with the coupler and a computer terminal respectively connected with the coupler and the remote power line broadband communication device, and the communication signal is received through the power line to be detected.
Further, the coupler comprises a coupling capacitor, a coupling magnetic ring and a lightning arrester. In this embodiment, preferably, the coupling capacitance is >0.1 uF; the coupling magnetic ring can be a medium-voltage magnetic ring; the arrester can be zinc oxide arrester.
Furthermore, the remote power line broadband communication device comprises a signal coupling unit, a signal sending unit, a signal receiving unit, a data processing unit and a transmission interface; the signal transmitting unit and the signal receiving unit are connected with the signal coupling unit; the signal sending unit and the signal receiving unit are also connected with the data processing unit; the data processing unit is also connected with the transmission interface; the signal transmitting unit comprises a power modulation module and a power carrier transmitting module; the signal receiving unit comprises a power carrier sampling module and a power demodulation module.
Further, the power signal to be detected includes a voltage and an impedance of the power line to be detected.
Further, the current operating state includes: normal operation, fault operation and overhaul operation. In this embodiment, the voltage class in the operating state of the power generation is 10kV, the operating state of the fault is not in the power-off state, and the maintenance operating state is preset according to the actual operating standard of the line or the corresponding operating index.
Further, when the current operation state is normal operation, the remote power line broadband communication device adopts a first power carrier to transmit power of 28 dBm; and when the current running state is maintenance running, the remote power line broadband communication device adopts a second power carrier to transmit power of 25 dBm.
Further, when the current operation state is fault operation, the computer terminal compares the current collected power signal to be detected with a fault reference power signal prestored in the computer terminal to determine the current fault grade; and the computer terminal adjusts the power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current fault grade of the power line to be detected, and injects the signal into the power line to be detected.
Further, the fault reference power signal comprises the voltage and the impedance of the power line to be detected; current fault classes include short circuits, short to ground, and wire breaks. In this embodiment, the voltages and impedances corresponding to the short circuit, the short circuit to ground, and the disconnection are predetermined according to the actual operation standard or the corresponding operation index of the specific line.
Further, when the current fault level is a short circuit, the remote power line broadband communication device transmits power 32dBm by using a third power carrier; when the current fault level is short circuit grounding, the remote power line broadband communication device adopts a fourth power carrier to transmit power of 35 dBm; and when the current fault level is disconnection, the long-distance power line broadband communication device adopts the fifth power carrier to transmit power of 38 dBm.
Further, the system also comprises an external terminal connected with the computer terminal; the external terminal comprises a camera unit, a voice unit, a GPS positioning unit, an intelligent ammeter or an audible and visual alarm unit and the like. If can set up camera unit and the communication module who is connected with this camera unit on a maintainer safety helmet, be convenient for to the on-the-spot control of overhauing. Through setting up speech unit and the communication module who links to each other with this speech unit on an maintainer safety helmet, be convenient for overhaul and carry out the pronunciation interaction now. The communication module connected with the GPS positioning unit is arranged on an overhauling vehicle through the GPS positioning unit, so that the overhauling vehicle can be conveniently positioned. Through smart electric meter and the communication module who is connected with this smart electric meter, can guarantee ammeter data transmission's stability. The sound-light alarm unit and the communication module connected with the sound-light alarm unit can facilitate the timely and accurate monitoring of remote monitoring personnel.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (9)
1. A method for ensuring power line communication when a power line is in a fault and maintenance state is characterized in that a power line to be detected for power line communication and a communication module arranged on the power line to be detected are provided; the communication module comprises a coupler coupled with the power line to be detected, a remote power line broadband communication device connected with the coupler and a computer terminal respectively connected with the coupler and the remote power line broadband communication device; the computer terminal acquires a to-be-detected power signal of the to-be-detected power line through the coupler, compares the to-be-detected power signal with a reference power signal prestored in the computer terminal, and judges the current running state of the to-be-detected power line; the computer terminal adjusts the power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current running state of the power line to be detected, and injects the signal into the power line to be detected;
the remote power line broadband communication device comprises a signal coupling unit, a signal sending unit, a signal receiving unit, a data processing unit and a transmission interface; the signal transmitting unit and the signal receiving unit are connected with the signal coupling unit; the signal sending unit and the signal receiving unit are also connected with the data processing unit; the data processing unit is also connected with the transmission interface; the signal sending unit comprises a power modulation module and a power carrier sending module; the signal receiving unit comprises a power carrier sampling module and a power demodulation module.
2. The method of claim 1, wherein the coupler comprises a coupling capacitor, a coupling magnetic ring and a lightning arrester.
3. The method according to claim 1, wherein the power signal to be detected comprises a voltage and an impedance of the power line to be detected.
4. The method of claim 1, wherein the current operating state comprises: normal operation, fault operation and overhaul operation.
5. The method for ensuring power line communication in the fault and overhaul state of the power line as claimed in claim 4, wherein when the current operation state is normal operation, the long-distance power line broadband communication device transmits power by using a first power carrier; and when the current running state is maintenance running, the remote power line broadband communication device transmits power by adopting a second power carrier.
6. The method for ensuring power line communication in the fault and overhaul state of the power line according to claim 5, wherein when the current operation state is fault operation, the computer terminal compares a currently acquired power signal to be detected with a fault reference power signal prestored in the computer terminal to determine a current fault level; and the computer terminal adjusts the power carrier wave transmitting power of the power signal by controlling the remote power line broadband communication device according to the current fault grade of the power line to be detected, and injects the signal into the power line to be detected.
7. The method for securing power line communication during fault and service conditions of a power line according to claim 6, wherein the fault reference power signal comprises the voltage and impedance of the power line to be detected; the current fault classes include short circuits, short circuit to ground, and wire breaks.
8. The method for ensuring power line communication in the fault and overhaul state of the power line as claimed in claim 7, wherein when the current fault level is short circuit, the long-distance power line broadband communication device transmits power by using a third power carrier; when the current fault level is short circuit grounding, the remote power line broadband communication device transmits power by adopting a fourth power carrier; and when the current fault level is disconnection, the long-distance power line broadband communication device adopts a fifth power line carrier to transmit power.
9. The method for ensuring the power line communication of the power line in the fault and overhaul states of claim 1, further comprising an external terminal connected to the computer terminal; the external terminal comprises a camera unit, a voice unit, a GPS positioning unit, an intelligent ammeter or an audible and visual alarm unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710612096.0A CN107404335B (en) | 2017-07-25 | 2017-07-25 | Method for guaranteeing power line communication in fault and maintenance states of power line |
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| CN201710612096.0A CN107404335B (en) | 2017-07-25 | 2017-07-25 | Method for guaranteeing power line communication in fault and maintenance states of power line |
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| CN107404335B true CN107404335B (en) | 2020-12-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107872248B (en) * | 2017-12-27 | 2021-04-20 | 北京三清互联科技有限公司 | Power line broadband carrier communication method |
| CN108229701A (en) * | 2018-01-04 | 2018-06-29 | 国网浙江省电力有限公司电力科学研究院 | Intelligent substation measure and control device sampled value overhauls application process and system |
| CN110244195A (en) * | 2019-06-12 | 2019-09-17 | 国网江苏省电力有限公司南京供电分公司 | A kind of distribution line distance measuring method based on power line carrier signal |
| CN113655330A (en) * | 2021-01-05 | 2021-11-16 | 青岛鼎信通讯股份有限公司 | 10kV line state detection system based on line noise monitoring |
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