CN108075808B - Power carrier frequency control method and device - Google Patents
Power carrier frequency control method and device Download PDFInfo
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- CN108075808B CN108075808B CN201711280207.9A CN201711280207A CN108075808B CN 108075808 B CN108075808 B CN 108075808B CN 201711280207 A CN201711280207 A CN 201711280207A CN 108075808 B CN108075808 B CN 108075808B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
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- H04B3/46—Monitoring; Testing
- H04B3/48—Testing attenuation
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Abstract
The invention discloses a power carrier frequency control method and a power carrier frequency control device, wherein the method comprises the following steps: reading cable characteristic parameters of the power bus detected by the circuit detection module circuit, analyzing and generating a configuration instruction; and sending the generated configuration instruction to the power line carrier module circuit so that the power line carrier circuit configures the working state of the power line carrier module circuit according to the configuration instruction. The invention solves the problem that the communication distance and the communication quality are influenced by the circuit attenuation in the long-distance communication in the power carrier technology in the prior art, and improves the communication distance and the communication quality of the power carrier.
Description
Technical Field
The invention relates to the technical field of power line carriers, in particular to a power line carrier frequency control method and device.
Background
Along with the development trend of energy internet, energy information interconnection is tighter. As a power line carrier technology which has been the longest studied for information carrier transmission, development thereof has mainly focused on medium-high voltage power communication lines. One of the major reasons is that the loads of the power system are various and changeable, the power lines attenuate signals differently, and the absorption degrees of the signals are also very different, so that the power carrier module cannot achieve long-distance communication in some special occasions.
Aiming at the problem that the communication distance and the communication quality are influenced by line attenuation in long-distance communication in the power carrier technology in the related technology, no effective solution is provided at present.
Disclosure of Invention
The invention provides a power carrier frequency control method and a power carrier frequency control device, which at least solve the problem that the communication distance and the communication quality are influenced by line attenuation in long-distance communication in the power carrier technology in the prior art.
To solve the above technical problem, according to an aspect of the present invention, there is provided a power carrier frequency control method including: reading the cable characteristic parameters detected by the circuit detection module circuit, analyzing and generating a configuration instruction, wherein the circuit detection module circuit is connected to the power bus and used for detecting the cable characteristic parameters of the power bus; and sending the generated configuration instruction to a power line carrier module circuit so that the power line carrier module circuit configures the working state of the power line carrier module circuit according to the configuration instruction, wherein the power line carrier module circuit is connected to the power bus.
Optionally, the cable characteristic parameter of the power bus detected by the line detection module circuit includes at least one of: line capacitive reactance, line inductive reactance, line equivalent resistance, line admittance.
Optionally, reading a cable characteristic parameter detected by the circuit detection module circuit, analyzing, and generating a configuration instruction, including: and analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining a carrier frequency, and generating a configuration command corresponding to the determined carrier frequency.
Optionally, analyzing a cable model of the power bus according to the read cable characteristic parameter of the power bus, and determining a carrier frequency, including: analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining attenuation frequency characteristics of the cable model, calculating the maximum loss point frequency of the cable model, determining a maximum loss interval, and determining carrier frequency by avoiding the maximum loss interval.
Optionally, analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining a carrier frequency, and generating a configuration instruction corresponding to the determined carrier frequency, includes: analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, and determining gears corresponding to carrier frequencies, wherein a plurality of gears are preset, and each gear corresponds to carrier frequencies in different ranges; and generating a configuration instruction corresponding to the gear corresponding to the determined carrier frequency according to the gear corresponding to the determined carrier frequency.
Optionally, sending the generated configuration instruction to the power line carrier module circuit to enable the power line carrier module circuit to configure the operating state thereof according to the configuration instruction, includes: and sending the generated configuration instruction to the power line carrier module circuit so that the power line carrier module circuit configures the carrier frequency according to the configuration instruction.
Optionally, reading a cable characteristic parameter of the power bus detected by the circuit detection module circuit, analyzing the cable characteristic parameter, and generating a configuration instruction, further includes: and analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining a modulation mode and a signal amplification factor, and generating a configuration instruction corresponding to the determined modulation mode and the signal amplification factor.
Optionally, after sending the generated configuration instruction to the power line carrier module circuit to enable the power line carrier module circuit to configure its operating state according to the configuration instruction, the method further includes: and outputting the data to the power line carrier module circuit, and transmitting the data to the power bus through the power line carrier module circuit.
Optionally, sending the generated configuration instruction to the power line carrier module circuit to enable the power line carrier module circuit to configure the operating state thereof according to the configuration instruction includes: the carrier frequency of the fixed power line carrier module circuit is a fixed value; analyzing the optimal cable characteristic parameters corresponding to the fixed values according to the fixed values; and adjusting the cable characteristic parameters of the circuit bus into the optimal cable characteristic parameters.
According to another aspect of the present invention, there is provided a power carrier frequency control apparatus including: the system comprises a line detection module circuit, a processor and a power line carrier module circuit, wherein the line detection module circuit is connected to a power bus and used for detecting cable characteristic parameters on the power bus; the processor is connected with the circuit detection module circuit and used for reading the cable characteristic parameters detected by the circuit detection module circuit, analyzing the cable characteristic parameters and generating a configuration instruction according to an analysis result; and the power line carrier module circuit is used for receiving the configuration instruction sent by the processor and configuring the working state of the power line carrier module circuit according to the configuration instruction.
Optionally, the processor is further configured to output data to the power line carrier module circuit, and transmit the data to the power bus through the power line carrier module circuit.
In the invention, when the power carrier frequency is controlled, different cable characteristic parameters are considered, and a control instruction is generated according to the cable characteristic parameters of the power bus detected by the circuit detection module circuit, so as to control the working state of the power line carrier module circuit.
Drawings
Fig. 1 is an alternative flow chart of a power carrier frequency control method according to an embodiment of the present invention; and
fig. 2 is an alternative structure diagram of the power carrier frequency control device according to the embodiment of the invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
The power carrier frequency control method according to the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, the power carrier frequency control method may include the following steps S102 to S104:
s102, reading the cable characteristic parameters detected by the circuit detection module circuit, analyzing and generating a configuration instruction, wherein the circuit detection module circuit is connected to the power bus and used for detecting the cable characteristic parameters of the power bus;
preferably, the cable characteristic parameter of the power bus detected by the line detection module circuit may include: one or more of line capacitive reactance, line inductive reactance, line equivalent resistance and line admittance can also be added to detect other cable characteristic parameters according to the circuit requirements.
And S104, sending the generated configuration instruction to the power line carrier module circuit so that the power line carrier module circuit configures the working state of the power line carrier module circuit according to the configuration instruction, wherein the power line carrier module circuit is connected to the power bus.
In the above embodiment, when the power carrier frequency is controlled, different cable characteristic parameters are considered, and a control instruction is generated according to the cable characteristic parameter of the power bus detected by the read line detection module circuit, so as to control the working state of the power line carrier module circuit.
During concrete implementation, read the cable characteristic parameter of the power bus that circuit detection module circuit detected to analyze, generate the configuration instruction, include: and analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining a carrier frequency, and generating a configuration command corresponding to the determined carrier frequency. Preferably, when the scheme is implemented, a cable model of the power bus may be analyzed according to the read cable characteristic parameters of the power bus, attenuation frequency characteristics of the cable model are determined, a maximum loss point frequency of the cable model is calculated, a maximum loss interval is determined, and the carrier frequency is determined by avoiding the maximum loss interval. For example, the maximum loss point and the ± 3dB frequency range of the model corresponding to the line access cable are calculated by using a model detection and modeling technique, and then, the power line signal carrier frequency is adjusted to the minimum attenuated carrier frequency while avoiding the attenuation point based on the calculation result.
Preferably, when the cable model of the power bus is analyzed according to the read cable characteristic parameters of the power bus, the carrier frequency is determined, and the configuration instruction corresponding to the determined carrier frequency is generated, the cable model of the power bus may be analyzed according to the read cable characteristic parameters of the power bus, the gear corresponding to the carrier frequency is determined, wherein a plurality of gears are preset, and each gear corresponds to a carrier frequency in a different range; then, a configuration command corresponding to the shift position corresponding to the determined carrier frequency is generated based on the shift position corresponding to the determined carrier frequency. By setting the mapping relation between the gears and the carrier frequencies in different ranges, configuration instructions can be generated more quickly and conveniently, and adjustment and control are facilitated.
Preferably, after sending the generated configuration instruction to the power line carrier module circuit to enable the power line carrier module circuit to configure its operating state according to the configuration instruction, the method further includes: and outputting the data to the power line carrier module circuit, and transmitting the data to the power bus through the power line carrier module circuit.
In addition to the above-described arrangement of carrier frequencies, the generated arrangement command may be generated by analyzing a cable model of the power bus based on the read cable characteristic parameters of the power bus, specifying a modulation scheme and a signal amplification factor, and generating an arrangement command corresponding to the specified modulation scheme and signal amplification factor. By the embodiment, the configuration diversity can be realized, and the universality of the power carrier module is further improved.
As another embodiment, when the generated configuration instruction is sent to the power line carrier module circuit to enable the power line carrier module circuit to configure its operating state according to the configuration instruction, the carrier frequency of the power line carrier module circuit is fixed to a fixed value; analyzing the optimal cable characteristic parameters corresponding to the fixed value according to the fixed value; and adjusting the cable characteristic parameter of the circuit bus into the optimal cable characteristic parameter. The implementation mode reduces control steps, realizes simple optimization control, and also realizes the effect of improving communication distance and communication quality.
Example 2
Based on the power carrier frequency control method provided in embodiment 1, an optional embodiment 2 of the present invention further provides a power carrier frequency control device, fig. 2 shows an optional schematic structure diagram of the device, and as shown in the schematic diagram of fig. 2, the device includes two remote communication modules (a module circuit 1 and a module circuit 2), specifically, the power carrier frequency control device includes: a line detection module circuit, a processor and a power line carrier module circuit, wherein,
the line detection module circuit is connected to the power bus (the circuit bus shown in fig. 2 may be a single-phase alternating current L/N or a direct current bus), and is used for detecting a cable characteristic parameter on the power bus;
the processor is connected with the circuit detection module circuit and used for reading the cable characteristic parameters detected by the circuit detection module circuit, analyzing the cable characteristic parameters and generating a configuration instruction according to an analysis result;
and the power line carrier module circuit is used for receiving the configuration instruction sent by the processor and configuring the working state of the power line carrier module circuit according to the configuration instruction.
Preferably, the processor is further configured to output data to the power line carrier module circuit, and transmit the data to the power bus through the power line carrier module circuit.
In the above embodiment, during power carrier frequency control, different cable characteristic parameters are considered, a control instruction is generated according to a cable characteristic parameter of a power bus detected by a read line detection module circuit, and then the operating state of the power line carrier module circuit is controlled.
The following is a detailed description of the various parts of the power carrier frequency control apparatus shown in fig. 2 for a better understanding of the present apparatus:
the module circuit of the invention comprises three parts:
1. the power line carrier module circuit mainly comprises the following functions: receiving processor instruction, and configuring self state. The main configuration is carrier frequency, modulation mode and signal amplification factor; receiving a data signal sent by the processor, and completely transmitting the data signal to a power bus (the circuit bus can be a single-phase alternating current L/N or a direct current bus); thirdly, signals from the power bus are received, filtered and frequency-selected, and then sent to the processor.
2. A processor, whose primary functions include: firstly, outputting a configuration instruction to a power line carrier module circuit to configure the working state of the power line carrier module circuit; outputting data to a power line carrier module circuit, and transmitting the data to a power bus through the power line carrier module circuit; reading circuit parameters of the line detection module, and performing processing analysis;
3. the circuit of the line detection module has the main functions of: firstly, detecting the characteristics of a cable on a power bus, wherein the characteristics mainly comprise line capacitive reactance, line inductive reactance, line equivalent resistance, line admittance and the like; and secondly, uploading the detection data to a processor.
The working process is that the module circuit 1 and the module circuit 2 are two communication modules with a long distance (without actual distance), and the two module circuits are communicated by a power bus. The two module circuits have the same function. After the circuit connection is finished, the cable parameters of the power bus are detected by the line detection module, the data of the line detection module are read by the processor at regular time, and the analysis processing is carried out to analyze the cable model; then the whole communication system can make the following two choices to achieve the optimal transmission and reduce the transmission loss:
1) and fixing the carrier frequency of the power line carrier module, analyzing the optimal parameter characteristics suitable for the cable by the carrier frequency, comparing the detected cable parameters, and modifying the cable.
2) And analyzing the attenuation frequency characteristic of the detected cable parameter data, and automatically setting the optimal transmission carrier frequency by the processor to avoid the cable attenuation. Under the control mode, a plurality of carrier frequency gears can be set in the processor, and the carrier frequency of the optimal gear is determined by analyzing the cable model. Therefore, the power line carrier modules connected to the same power bus can work at the same carrier frequency, and normal communication is guaranteed.
With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A power carrier frequency control method, comprising:
reading the cable characteristic parameters detected by the circuit detection module circuit, analyzing and generating a configuration instruction, wherein the method comprises the following steps: analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining attenuation frequency characteristics of the cable model, calculating the maximum loss point frequency of the cable model according to the determined attenuation frequency characteristics of the cable model, determining a maximum loss interval, avoiding the maximum loss interval to determine a carrier frequency, and specifically comprising: analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, and determining gears corresponding to carrier frequencies, wherein a plurality of gears are preset, and each gear corresponds to carrier frequencies in different ranges; generating a configuration instruction corresponding to the gear corresponding to the determined carrier frequency according to the gear corresponding to the determined carrier frequency, wherein the line detection module circuit is connected to the power bus and used for detecting the cable characteristic parameters of the power bus;
and sending the generated configuration instruction to a power line carrier module circuit so that the power line carrier module circuit configures the working state of the power line carrier module circuit according to the configuration instruction, wherein the power line carrier module circuit is connected to the power bus.
2. The method of claim 1, wherein the line sensing module circuit senses a cable characteristic of the power bus that includes at least one of: line capacitive reactance, line inductive reactance, line equivalent resistance, line admittance.
3. The method according to claim 1, wherein the sending the generated configuration instruction to a power line carrier module circuit to enable the power line carrier module circuit to configure its operating state according to the configuration instruction comprises:
and sending the generated configuration instruction to a power line carrier module circuit so that the power line carrier module circuit configures the carrier frequency according to the configuration instruction.
4. The method of claim 1, wherein the reading and analyzing the cable characteristic parameters of the power bus detected by the line detection module circuit to generate the configuration command further comprises:
and analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining a modulation mode and a signal amplification factor, and generating a configuration instruction corresponding to the determined modulation mode and the signal amplification factor.
5. The method according to claim 1, wherein after the sending the generated configuration instruction to the power line carrier module circuit to make the power line carrier module circuit configure its operating state according to the configuration instruction, the method further comprises:
and outputting data to the power line carrier module circuit, and transmitting the data to the power bus through the power line carrier module circuit.
6. The method according to claim 1, wherein the sending the generated configuration instruction to a power line carrier module circuit to enable the power line carrier module circuit to configure its operating state according to the configuration instruction comprises:
fixing the carrier frequency of the power line carrier module circuit as a fixed value;
analyzing the optimal cable characteristic parameters corresponding to the fixed value according to the fixed value;
and adjusting the cable characteristic parameters of the power bus into the optimal cable characteristic parameters.
7. A power carrier frequency control device, comprising: a line detection module circuit, a processor and a power line carrier module circuit, wherein,
the line detection module circuit is connected to the power bus and used for detecting the cable characteristic parameters on the power bus;
the processor is connected with the circuit detection module circuit, and is used for reading the cable characteristic parameters detected by the circuit detection module circuit, analyzing the cable characteristic parameters, and generating a configuration instruction according to an analysis result, and specifically used for: analyzing a cable model of the power bus according to the read cable characteristic parameters of the power bus, determining attenuation frequency characteristics of the cable model, calculating maximum loss point frequency of the cable model according to the determined attenuation frequency characteristics of the cable model, determining a maximum loss interval, and determining carrier frequency by avoiding the maximum loss interval; generating a configuration instruction corresponding to the gear corresponding to the determined carrier frequency according to the gear corresponding to the determined carrier frequency;
and the power line carrier module circuit is used for receiving the configuration instruction sent by the processor and configuring the working state of the power line carrier module circuit according to the configuration instruction.
8. The apparatus of claim 7, wherein the processor is further configured to output data to the power line carrier module circuitry, the data being transmitted to the power bus by the power line carrier module circuitry.
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| CN109552951B (en) * | 2018-11-30 | 2021-02-26 | 广州云犀智能科技有限公司 | Elevator digital communication system based on broadband power line carrier communication technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203722628U (en) * | 2014-01-15 | 2014-07-16 | 广西电网公司防城港供电局 | Power carrier channel communication tester |
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| US7375602B2 (en) * | 2000-03-07 | 2008-05-20 | Board Of Regents, The University Of Texas System | Methods for propagating a non sinusoidal signal without distortion in dispersive lossy media |
| JP3969451B2 (en) * | 2006-01-12 | 2007-09-05 | 松下電工株式会社 | Wiring device for power line carrier communication and power line carrier communication system |
| CN101119136B (en) * | 2006-08-04 | 2012-07-11 | 华为技术有限公司 | Method and device for obtaining essential parameter of circuit |
| WO2011050863A1 (en) * | 2009-10-30 | 2011-05-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement in a telecommunication system for estimating frequency dependent resistance |
| CN203243325U (en) * | 2013-04-01 | 2013-10-16 | 江苏林洋电子股份有限公司 | Carrier communication system based on dynamic characteristics of power line network impedance |
| US9100101B2 (en) * | 2013-04-15 | 2015-08-04 | Mediatek Inc. | Power line communication device and power control method thereof |
| CN106788590A (en) * | 2016-05-25 | 2017-05-31 | 熊慎勋 | Remote automatic meter reading is realized using resident's supply network |
| CN106374976A (en) * | 2016-09-12 | 2017-02-01 | 安徽南瑞中天电力电子有限公司 | Power line carrier communication-based electricity information collection terminal networking method |
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