CN111200453B - Power line carrier communication device and method - Google Patents
Power line carrier communication device and method Download PDFInfo
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- CN111200453B CN111200453B CN201911419883.9A CN201911419883A CN111200453B CN 111200453 B CN111200453 B CN 111200453B CN 201911419883 A CN201911419883 A CN 201911419883A CN 111200453 B CN111200453 B CN 111200453B
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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
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
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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
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
Abstract
The invention discloses a power line carrier communication device and a power line carrier communication method. Wherein, this power line carrier communication device includes: the power supply input unit acquires an alternating current power supply from the upper opening of the switch when the multi-phase switch is disconnected, converts the alternating current power supply into a direct current power supply and provides electric energy for the target carrier unit; the power supply output unit converts a direct-current power supply into output alternating-current electric energy to supply power to the next-stage carrier communication device; and the target carrier unit identifies the working target phase of the next-stage carrier communication device according to the communication phase selected by the selector when the multi-phase switch is disconnected, establishes communication connection with the next-stage carrier communication device, converts the power line carrier signal into a carrier digital signal, sends the carrier digital signal to the carrier controller, and outputs the carrier digital signal through the carrier controller.
Description
Technical Field
The invention relates to the technical field of carrier communication, in particular to a power line carrier communication device and method.
Background
In the related technology, many devices and power grids all use a power line carrier communication technology, namely, a PLC technology, and the PLC technology adopts a power line as a physical communication medium, so that the cost of network cables, optical fibers and the like is saved, and compared with a wireless communication network, the power line communication network is not influenced by shielding of a building and the like (the power line generally directly enters the building through a line), so that the power line communication network has the advantage of being unique in power distribution network communication.
However, the current power line carrier communication has a great disadvantage that when the power line switch is turned off, the physical link layer is turned off, and thus communication and power supply cannot be continuously realized, so that the application is limited.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a power line carrier communication device and a power line carrier communication method, which are used for at least solving the technical problem that communication and power supply cannot be continued under the condition that a power line switch is disconnected in the power line carrier communication process in the related technology.
According to an aspect of an embodiment of the present invention, there is provided a power line carrier communication apparatus including: the power supply input unit is used for acquiring an alternating current power supply from the upper port of the switch when the multi-phase switch is disconnected, converting the alternating current power supply into a direct current power supply and providing electric energy for the target carrier unit; the power supply output unit converts the direct-current power supply into output alternating-current electric energy to supply power for the next-stage carrier communication device; and the target carrier unit identifies the working target phase of the next-stage carrier communication device according to the communication phase selected by the selector when the multi-phase switch is disconnected, establishes communication connection with the next-stage carrier communication device, converts a power line carrier signal into a carrier digital signal, sends the carrier digital signal to the carrier controller, and outputs the carrier digital signal through the carrier controller.
Optionally, the power line carrier communication apparatus further includes: the modem is connected with the carrier controller and used for converting the power line carrier signal into a carrier digital signal; the first coupler and the second coupler are respectively connected with the modem; after the communication connection is established between the target carrier unit and the next-stage carrier communication device, the power line carrier signal is transmitted into the modem through the second coupler, and the modem converts the power line carrier signal into a carrier digital signal and sends the carrier digital signal to the carrier controller; the carrier controller forwards the carrier digital signal to the modem according to the communication instruction, and the modem converts the carrier digital signal into a target power line carrier signal and outputs the target power line carrier signal through the first coupler.
Optionally, the communication channels of the first coupler and the second coupler are spare for each other.
Optionally, the first coupler and the second coupler respectively and independently operate in different communication frequency bands, and a full-duplex operating mode is adopted.
Optionally, the selector is configured to select a communication phase of the second coupler, where the communication phase is one of: phase A, phase B and phase C.
Optionally, when the multi-phase switch is turned off, the power is taken from the switch to supply power to the target carrier unit, and when the multi-phase switch is turned off, the power output unit does not operate.
Optionally, when the multi-phase switch is closed, at least one of the following communication paths is selected: a first coupler single-phase communication path, a second coupler a-phase communication path, a second coupler B-phase communication path, and a second coupler C-phase communication path.
Optionally, after identifying a target communication path, the carrier controller of the power line carrier communication device determines a switch branch attribution relationship with the target communication path to obtain a communication topological graph.
According to another aspect of the embodiments of the present invention, there is also provided a power line carrier communication method, including: when the multi-phase switch is disconnected, an alternating current power supply is obtained from the upper opening of the switch, and the alternating current power supply is converted into a direct current power supply to provide electric energy for a target carrier unit; converting the direct current power supply into output alternating current power to supply power for the next stage of carrier communication device; when the multi-phase switch is disconnected, the target phase of the next-stage carrier communication device is identified according to the communication phase selected by the selector, communication connection is established with the next-stage carrier communication device, a power line carrier signal is sent to the carrier controller, the target power line carrier signal transmitted by the carrier controller is received, and the target power line carrier signal is output.
Optionally, the power line carrier communication method further includes: when the multi-phase switch is closed, the power is supplied to the target carrier unit after the power is taken from the upper opening of the switch, wherein when the multi-phase switch is closed, the power output unit does not work.
In the embodiment of the invention, when the multi-phase switch is disconnected, an alternating current power supply is obtained from the upper port of the switch, the alternating current power supply is converted into a direct current power supply to provide electric energy for the target carrier unit, then the direct current power supply is converted into output alternating current electric energy through the power supply output unit to supply power for the next-stage carrier communication device, and finally, when the multi-phase switch is disconnected, the target phase of the next-stage carrier communication device is identified according to the communication phase selected by the selector through the target carrier unit, the communication connection is established with the next-stage carrier communication device, a power line carrier signal is sent to the carrier controller, and a carrier digital signal is output through the carrier controller. In the embodiment, carrier communication can be enhanced, the carrier module can be ensured to be not powered off through a power supply path of a power supply when the switch is disconnected, and normal transmission of power communication signals is realized, so that the technical problems that communication and power supply cannot be continued due to the fact that the power line switch is disconnected in the power line carrier communication process in the related art are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of an alternative power line carrier communication apparatus according to an embodiment of the present invention;
fig. 2 is a flow chart of an alternative power line carrier communication method according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the prior art, when communication is performed, the communication includes two modes, namely wireless communication and wired communication, wherein communication under the condition that a switch is disconnected is realized in a wireless mode, the communication is influenced by shielding of a building, and the condition that communication cannot be performed may occur. When the switch is turned off through the power line carrier communication, the power line is interrupted, and the communication work cannot be continuously supported.
The invention realizes the carrier module communication and power supply under the condition of switch disconnection by organically combining the newly designed power line carrier communication device and the switch, and further can realize the applications of power failure time reporting, topology identification and the like. Next, a power line carrier communication apparatus will be explained.
Fig. 1 is a schematic diagram of an alternative power line carrier communication apparatus according to an embodiment of the present invention, which includes a power input unit, a power output unit, and a target carrier unit, wherein,
the power line carrier communication device in the embodiment of the invention is respectively connected with the switch upper port and the switch lower port, and the switch upper port and the switch lower port are connected through the multiphase switch. For example, in fig. 1 the multi-phase switches include A, B, C corresponding switches.
And the power supply input unit acquires an alternating current power supply from the upper opening of the switch when the multi-phase switch is disconnected, converts the alternating current power supply into a direct current power supply and provides electric energy for the target carrier unit.
For example, the input range AC/DC is schematically illustrated in FIG. 1.
And the power output unit converts the direct-current power supply into output alternating-current electric energy to supply power for the next-stage carrier communication device.
For example, the output DC/AC is illustrated schematically in FIG. 1.
And the target carrier unit identifies the working target phase of the next-stage carrier communication device according to the communication phase selected by the selector when the multi-phase switch is disconnected, establishes communication connection with the next-stage carrier communication device, converts the power line carrier signal into a carrier digital signal, sends the carrier digital signal to the carrier controller, and outputs the carrier digital signal through the carrier controller.
The power line carrier communication device can obtain an alternating current power supply from the upper opening of the switch when the multi-phase switch is disconnected, convert the alternating current power supply into a direct current power supply, provide electric energy for the target carrier unit, convert the direct current power supply into output alternating current electric energy through the power output unit, supply power for the next-stage carrier communication device, finally identify the target phase of the next-stage carrier communication device according to the communication phase selected by the selector when the multi-phase switch is disconnected, establish communication connection with the next-stage carrier communication device, convert a power line carrier signal into a carrier digital signal, send the carrier digital signal to the carrier controller, and output the carrier digital signal through the carrier controller. In the embodiment, the carrier communication is enhanced, and the carrier module can be ensured not to be powered off through the power supply path of the power supply when the switch is disconnected, so that the transmission of power communication signals is realized, and the technical problems that the power line switch is disconnected in the power line carrier communication process in the related art, the communication cannot be continued and the power supply cannot be supplied are solved.
Optionally, the power line carrier communication device further includes: a modem connected to a carrier controller (in fig. 1, "power line carrier controller") for converting a power line carrier signal into a carrier digital signal; a first coupler (corresponding to "coupler 1" in fig. 1) and a second coupler (corresponding to "coupler 2" in fig. 1) respectively connected to the modem; after the target carrier unit is in communication connection with the next-stage carrier communication device, the power line carrier signal is transmitted into the modem through the second coupler, and the modem converts the power line carrier signal into a carrier digital signal and transmits the carrier digital signal to the carrier controller; the carrier controller forwards the carrier digital signal to the modem according to the communication instruction, and the modem converts the carrier digital signal into a target power line carrier signal and outputs the power line carrier signal through the first coupler.
Alternatively, the communication channels of the first coupler and the second coupler are spare for each other.
In the embodiment of the invention, the first coupler and the second coupler respectively and independently work in different communication frequency bands, and a full-duplex working mode is adopted.
Optionally, the selector is configured to select a communication phase of the second coupler, where the communication phase is one of: phase A, phase B and phase C.
Optionally, when the multi-phase switch is turned off, the power is taken from the switch to supply power to the target carrier unit, and when the multi-phase switch is turned off, the power output unit does not work.
As an alternative embodiment of the invention, when the multi-phase switch is closed, at least one of the following communication paths is selected: a first coupler single-phase communication path, a second coupler a-phase communication path, a second coupler B-phase communication path, and a second coupler C-phase communication path.
Optionally, after the carrier controller of the power line carrier communication device identifies the target communication path, the switch branch attribution relationship with the target communication path is determined, so as to obtain the communication topological graph.
This application is at the during operation, divide into two kinds of operating condition, include: the state when the switch is closed and the state after the switch is disconnected.
Corresponding to the state of the first switch when closed in FIG. 1
Power supply path: the wide-range input AC/DC is used for taking power from the switch to supply power for the carrier communication module. At this time, the output DC/AC power supply does not operate.
Communication physical layer path: the communication path has four options, namely a coupler 1 single phase, a coupler 2A phase, a coupler 2B phase and a coupler 2C phase.
The applications that can be developed are:
1. the selector selects the phase of coupler operation, so as to judge the A, B, C three-phase corresponding relation of the switch.
2. The channels of the coupler 1 and the coupler 2 can be mutually standby, and when one channel is damaged, the other channel can be adopted for communication.
3. The two couplers can independently work in different frequency bands, so that the two couplers can independently work and realize full duplex.
Second state after switch off
Power supply path: after the switch is disconnected, the wide-range input AC/DC can still get power from the upper opening of the switch, the wide-range input AC/DC is converted into direct current through the isolated AC/DC, the direct current passes through the DC/DC or directly reaches the DC/AC, in order to ensure personal safety, the AC voltage can be selected to be not more than 24V, the AC is output to supply power for the next-stage carrier communication device, and after the next-stage carrier module receives the alternating current, the wide-range input AC/DC is converted into the direct current to supply power for the carrier module.
Communication physical layer path: after the switch is disconnected, the power line carrier controller controls the selector to respectively select A, B, C phases, identifies the working phase of the next-stage carrier communication device and establishes communication connection, a power line carrier signal is transmitted into the modem through the coupler 2, the modem converts the carrier signal into a digital signal and transmits the digital signal to the carrier controller, and the carrier controller transmits the digital signal to the modem to become a carrier signal and transmits the carrier signal through the coupler 1.
A communication network layer: after the switch is disconnected, the carrier module works in a relay mode, and the next-stage carrier communication device is sent to the previous-stage switch after communication is relayed.
The applications that can be developed are:
1. after the switch is disconnected, the carrier module is guaranteed to be not powered off through a power supply path of the power supply, and therefore the function of reporting power failure events is achieved.
2. After the switch is disconnected, the communication path is identified, so that the affiliation relationship of the switch branches is determined, and the topology is identified.
Optionally, in the embodiment of the present invention, power supply under power failure may be realized by additionally installing a super capacitor, so that power may be supplied in a short time. Compared with the prior art, the power supply time is 1-3min generally, but the power supply time cannot be maintained for a long time, in addition, the influence of the environment temperature on the super capacitor is large, if the super capacitor is integrated into primary equipment such as a switch and a transformer, the service life of the super capacitor can be greatly reduced when the temperature rise is large, and the power supply under the power failure can be realized by additionally installing the super capacitor in the embodiment of the invention.
Through the embodiment, the functions of power failure event reporting, topology identification, full duplex and the like can be realized through the power line carrier enhanced design.
According to an embodiment of the present invention, there is provided a power line carrier communication method embodiment, it is noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 2 is a flowchart of an alternative power line carrier communication method according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S202, when the multi-phase switch is disconnected, an alternating current power supply is obtained from the upper port of the switch, and the alternating current power supply is converted into a direct current power supply to provide electric energy for a target carrier unit;
step S204, converting the direct current power supply into output alternating current power to supply power for the next stage of carrier communication device;
and S206, when the multi-phase switch is disconnected, identifying the working target phase of the next-stage carrier communication device according to the communication phase selected by the selector, establishing communication connection with the next-stage carrier communication device, sending the power line carrier signal to the carrier controller, receiving the target power line carrier signal transmitted by the carrier controller, and outputting the target power line carrier signal.
Through the steps, when the multi-phase switch is disconnected, an alternating current power supply can be obtained from the upper opening of the switch, and the alternating current power supply is converted into a direct current power supply to provide electric energy for the target carrier unit; converting the direct current power supply into output alternating current power to supply power for the next stage of carrier communication device; when the multi-phase switch is disconnected, the target phase of the next-stage carrier communication device is identified according to the communication phase selected by the selector, communication connection is established with the next-stage carrier communication device, the power line carrier signal is sent to the carrier controller, the target power line carrier signal transmitted by the carrier controller is received, and the target power line carrier signal is output. In the embodiment, the carrier communication is enhanced, and the carrier module can be ensured not to be powered off through the power supply path of the power supply when the switch is disconnected, so that the transmission of power communication signals is realized, and the technical problems that the power line switch is disconnected in the power line carrier communication process in the related art, the communication cannot be continued and the power supply cannot be supplied are solved.
Optionally, the power line carrier communication method further includes: when the multi-phase switch is closed, the power is taken from the upper opening of the switch and then supplied to the target carrier unit, wherein when the multi-phase switch is closed, the power output unit does not work.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a power line carrier communication device, its characterized in that, the setting of heterogeneous switch and power line on, and the one end of power line carrier communication device is connected to the switch suitable for reading, the other end of power line carrier communication device is connected to the switch suitable for reading, include:
the power supply input unit is used for acquiring an alternating current power supply from the upper opening of the switch when the multi-phase switch is disconnected, converting the alternating current power supply into a direct current power supply and providing electric energy for the target carrier unit;
the power supply output unit converts the direct-current power supply into output alternating-current electric energy to supply power for the next-stage carrier communication device;
and the target carrier unit identifies the working target phase of the next-stage carrier communication device according to the communication phase selected by the selector when the multi-phase switch is disconnected, establishes communication connection with the next-stage carrier communication device, converts a power line carrier signal into a carrier digital signal, sends the carrier digital signal to the carrier controller, and outputs the carrier digital signal through the carrier controller.
2. The apparatus according to claim 1, wherein the power line carrier communication apparatus further comprises:
the modem is connected with the carrier controller and used for converting the power line carrier signal into a carrier digital signal;
the first coupler and the second coupler are respectively connected with the modem;
after the communication connection is established between the target carrier unit and the next-stage carrier communication device, the power line carrier signal is transmitted into the modem through the second coupler, and the modem converts the power line carrier signal into a carrier digital signal and sends the carrier digital signal to the carrier controller; the carrier controller forwards the carrier digital signal to the modem according to the communication instruction, and then the modem converts the carrier digital signal into a target power line carrier signal and outputs the target power line carrier signal through the first coupler.
3. The apparatus of claim 2, wherein the communication channels of the first coupler and the second coupler are backup to each other.
4. The apparatus of claim 2, wherein the first coupler and the second coupler each independently operate in different communication bands in a full duplex mode of operation.
5. The apparatus of claim 2, wherein the selector is configured to select a communication phase of the second coupler, the communication phase being one of: phase A, phase B and phase C.
6. The apparatus of claim 5, wherein the power supply unit is powered after power is taken from the switch when the multi-phase switch is turned on, and wherein the power supply output unit does not operate when the multi-phase switch is turned on.
7. The apparatus of claim 6, wherein when the multi-phase switch is closed, at least one of the following communication paths is selected: a first coupler single-phase communication path, a second coupler a-phase communication path, a second coupler B-phase communication path, and a second coupler C-phase communication path.
8. The device according to claim 7, wherein the carrier controller of the power line carrier communication device determines a switch branch attribution relationship with a target communication path after identifying the target communication path, and obtains a communication topological graph.
9. A power line carrier communication method is characterized in that a multi-phase switch is arranged on a power line, an upper opening of the switch is connected with one end of a power line carrier communication device, and a lower opening of the switch is connected with the other end of the power line carrier communication device, and the method comprises the following steps:
when the multi-phase switch is disconnected, an alternating current power supply is obtained from the upper opening of the switch, and the alternating current power supply is converted into a direct current power supply to provide electric energy for a target carrier unit; converting the direct current power supply into output alternating current power to supply power for the next stage of carrier communication device;
when the multi-phase switch is disconnected, the target phase of the next-stage carrier communication device is identified according to the communication phase selected by the selector, communication connection is established with the next-stage carrier communication device, a power line carrier signal is sent to the carrier controller, the target power line carrier signal transmitted by the carrier controller is received, and the target power line carrier signal is output.
10. The method according to claim 9, wherein the power line carrier communication method further comprises:
when the multi-phase switch is closed, the power is supplied to the target carrier unit after the power is taken from the upper opening of the switch, wherein when the multi-phase switch is closed, the power output unit does not work.
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| CN101207527A (en) * | 2007-08-01 | 2008-06-25 | 许之端 | Network collocating management system based on network collocating platform area test control network |
| US8364326B2 (en) * | 2011-02-22 | 2013-01-29 | Asoka Usa Corporation | Set of sensor units for communication enabled for streaming media delivery with monitoring and control of power usage of connected appliances |
| CN102315689A (en) * | 2011-09-01 | 2012-01-11 | 珠海博威智能电网有限公司 | Medium-voltage switch controller based on power line broadband carrier communication |
| CN203840335U (en) * | 2014-03-27 | 2014-09-17 | 中电装备山东电子有限公司 | Multi-channel power line carrier wave communication automatic switching device |
| CN104954046B (en) * | 2014-03-31 | 2017-08-04 | 华为技术有限公司 | A kind of transmission method and device based on power line communication |
| CN204258836U (en) * | 2014-10-10 | 2015-04-08 | 珠海慧信微电子有限公司 | A kind of power wire broadband carrier communication network module test macro |
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| CN204406140U (en) * | 2015-03-02 | 2015-06-17 | 厦门大学 | A kind of bus type programable controller system |
| CN206451295U (en) * | 2016-12-13 | 2017-08-29 | 浙江恒业电子有限公司 | A kind of single-phase charge-controlled intelligent electric meter |
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