CN110445655B - Heterogeneous fusion framework for smart power grid - Google Patents
Heterogeneous fusion framework for smart power grid Download PDFInfo
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- CN110445655B CN110445655B CN201910743385.3A CN201910743385A CN110445655B CN 110445655 B CN110445655 B CN 110445655B CN 201910743385 A CN201910743385 A CN 201910743385A CN 110445655 B CN110445655 B CN 110445655B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The invention discloses a heterogeneous fusion framework for a smart power grid, which is characterized in that: a controller developed based on an SDN is built in a communication node of a core and is connected with a power line communication network, a micro-power wireless communication network and an NB-IoT three-network to support the receiving, modulation and transmission of signals; the invention utilizes the idea of Software Defined Networking (SDN), adds a controller to a power core communication Network center, judges the channel source and the signal type of a received signal by identifying the preamble of the received signal, and further determines the channel trend and the system model of the next step of the signal.
Description
Technical Field
The invention relates to the field of Power Line Communication (PLC) and wireless communication, in particular to a heterogeneous network fusion technology of a smart power grid.
Background
With the rapid development of the power industry, the manual collection of power utilization information can not meet the intelligent living habits of modern people for a long time, and the smart grid is formed by highly integrating modern advanced sensing measurement technology, communication technology, information technology, computer technology and control technology with a physical grid due to the continuous deepening of the service application of a power utilization information collection system.
Regarding the most important communication mode of the smart grid system, PLC and a small part of micro-power wireless communication are two common communication modes at present, and are often cooperated to operate together. The PLC technology is used for realizing the identification of the transformer area and the line, the evaluation of the power quality and the evaluation of the field noise, and supporting the power operation and maintenance. Due to higher requirements on the safety and mobility of power communication, the wireless communication technology is prominent in aspects of high-speed real-time control, effective network management and safety schemes organically integrating the power industry and is complementary with the PLC. In recent years, a micropower wireless communication technology is used in a specific area of a smart power grid, solves the problems of laying cost and difficulty, incapability of full coverage and low-voltage power taking in the traditional wireless public network communication system, and becomes the most important wireless power communication technology.
NB-IoT, one of the most interesting internet of things technologies, has also slowly emerged as an antenna for the power industry. The NB-IoT technology benefits from the popularization of three operators, has wide coverage and strong access capability, solves the problems of difficult deployment and inconvenient application service by a unified underlying data protocol, becomes an important supplement of the existing communication mode of the smart grid, and has been subjected to some tests and pilot points in the power industry slowly.
At present, a monolithic dual-mode communication chip integrating a power line carrier, micro-power wireless communication and an MCU (microprogrammed control unit) into a whole already exists in the power market, the heterogeneous problem of power line carrier/micro-power wireless dual-mode communication can be solved, but the emerging NB-IoT technology enriches a smart grid communication system, so that the dual-mode communication chip is developed in the latest era. The novel smart power grid needs to provide a technology capable of integrating power line communication, micro-power wireless communication and NB-IoT three-network heterogeneous, and solves the problem of three-mode communication.
Disclosure of Invention
The invention aims to provide a three-mode communication technology for a smart power grid, which integrates power line communication, micro-power wireless communication and NB-IoT three-network heterogeneous.
In order to achieve the purpose, the invention utilizes the idea of Software Defined Network (SDN) to add a controller to a power core communication Network center, judges the channel source and the signal type of a received signal by identifying the preamble of the signal, and further determines the next channel trend and the system model of the signal. The controller can effectively fuse three networks of power line communication, micro-power wireless communication and NB-IoT theoretically, provides a function of automatically switching to access a network, shares and multiplexes communication modules shared in the three networks, saves network equipment cost, reduces network switching time delay, and aims to realize heterogeneous fusion of the three networks of the power line communication, the micro-power wireless communication and the NB-IoT.
The technical purpose of the invention is realized by the following technical scheme:
a heterogeneous fusion framework for a smart grid is characterized in that: a controller developed based on an SDN is built in a communication node of a core and is connected with a power line communication network, a micro-power wireless communication network and an NB-IoT three-network to support receiving, modulating and transmitting signals.
Furthermore, the controller can receive and transmit three-network signals, and can process and switch the received signals into any one of the three networks to transmit the signals.
Further, the controller in the communication node may perform identification and authentication on the received signal, the identification on the channel source and the signal type is mainly performed by parsing the preamble sequence, and the identification and authentication on the transmission source is performed by a User Identifier (UI) of each communication node.
Further, the controller adaptively allocates a communication scheme according to the signal transmission target node, including a channel selection and a signal modulation mode, and allocates a frequency band and a subcarrier according to the corresponding communication scheme.
The controller works in the communication node according to the following principle:
step 1: performing signal identification according to the preamble of the received signal, and judging that the signal type is one of power line communication, micro-power wireless communication and NB-IoT;
step 2: demodulating the received signal according to the signal type judged in the step 1 to judge an original information sequence;
and step 3: judging a signal emission source according to UI information in the received signal, so that information maintenance and management of the smart grid are facilitated;
and 4, step 4: according to the distance of a transmitting target node of a signal in the next step, the requirement on communication quality, equipment deployment conditions and the like, an optimal communication scheme is adaptively matched;
and 5: the communication scheme in the step 4 points to a certain network protocol in power line communication, micro-power wireless communication and NB-IoT three networks, and modulates signals according to the corresponding protocol;
step 6: and sending the modulated signal to a target communication node in a selected form, and adding UI information of the node into the signal so as to facilitate the identity recognition of the next node.
Further, the communication scheme includes a power line communication scheme, a micro-power wireless communication scheme, and an NB-IoT communication scheme;
the power line communication scheme is used for sequentially carrying out scrambling, Turbo coding, channel interleaving, diversity copying, constellation point mapping and OFDM modulation on an original information sequence, and completely supporting the technical specification of interconnection and intercommunication of low-voltage power line broadband carrier communication of a national power grid company;
the micropower wireless communication scheme sequentially performs whitening coding and GFSK modulation on an original information sequence, and completely supports the specification of a micropower wireless power information acquisition system of a national power grid company;
the NB-IoT communication scheme is used for carrying out scrambling, modulation, layer mapping, precoding and OFDM modulation on an original information sequence in sequence, and completely supports a narrowband IoT NB-IoT protocol.
Further, the signal types include a power line signal, a micro-power wireless signal, and an NB-IoT signal;
the power line signal needs to be subjected to OFDM demodulation, signal demodulation, diversity combination, channel de-interleaving, Turbo decoding and descrambling to obtain an original information sequence;
the micropower wireless signal needs to be subjected to whitening decoding and GFSK demodulation to obtain an original information sequence;
and the NB-IoT signal needs to be demodulated and pre-decoded through OFDM to obtain an original information sequence.
In conclusion, the invention has the following beneficial effects: the method adds a controller for a power core communication Network center by using the idea of Software Defined Network (SDN), judges the channel source and the signal type of a received signal by identifying the preamble of the signal, and further determines the next channel trend and the system model of the signal. The controller can effectively fuse three networks of power line communication, micro-power wireless communication and NB-IoT theoretically, provides a function of automatically switching to access a network, shares and multiplexes communication modules shared in the three networks, saves network equipment cost, reduces network switching time delay, and aims to realize heterogeneous fusion of the three networks of the power line communication, the micro-power wireless communication and the NB-IoT.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only examples of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a heterogeneous converged architecture diagram for a smart grid;
fig. 2 is a flow chart of the controller receiving and sending signals.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.
Fig. 1 is a heterogeneous converged architecture diagram for a smart grid according to the present invention, and the following description is provided for each part of the architecture diagram:
a communication node: each communication node is internally provided with a controller for receiving and transmitting signals. In order to distinguish different nodes, each node has an identity code UI of the node, can be identified and read by a receiving unit of the controller and can also be authenticated and adopted by a transmitting unit;
a controller: the controller is internally in a Software Defined Network (SDN) form, and the communication between the communication nodes is intelligently adjusted and controlled to meet the requirements of an intelligent power grid. Firstly, judging a signal emission source (namely, a communication node from which the signal emission source is emitted) according to UI information in a received signal, facilitating information maintenance and management of a smart grid, processing the received signal, emitting the processed signal in an optimal communication mode, and communicating with a next communication node;
three network access: the three networks in the heterogeneous convergence architecture provided by the invention refer to power line communication, micro-power wireless communication and NB-IoT, and one of the paths can be theoretically selected for communication between any two nodes. However, due to differences in the distances between the communication nodes, requirements on communication quality, equipment deployment conditions and the like, the selection of the optimal path is often inconsistent, a technical scheme for intelligently selecting and switching network paths is required, and the difference requirements on communication between the nodes are met. The communication scheme of the three paths is as follows: the power line communication scheme is used for sequentially carrying out scrambling, Turbo coding, channel interleaving, diversity copying, constellation point mapping and OFDM modulation on an original information sequence, and completely supporting the technical specification of interconnection and intercommunication of low-voltage power line broadband carrier communication of national power grid companies; the micropower wireless communication scheme sequentially performs whitening coding and GFSK modulation on an original information sequence, and completely supports the specification of a micropower wireless power information acquisition system of a national grid company; the NB-IoT communication scheme carries out scrambling, modulation, layer mapping, precoding and OFDM modulation on the original information sequence in sequence, and completely supports the narrowband IoT NB-IoT protocol.
Fig. 2 is a flow chart of signals received and transmitted by the controller 1, and the operation principle of the controller of each communication node is the same, assuming that the communication node where the controller 1 is located receives the signal of the node 2 and transmits the signal to the communication node where the controller 3 is located. The steps of fig. 2 are explained as follows:
step 1: the controller 1 identifies signals according to the preamble of the received signals and judges that the signal type is one of power line communication, micro-power wireless communication and NB-IoT three networks;
step 2: demodulating the received signal according to the signal type judged in the step 1 to obtain an original information sequence;
and step 3: judging a signal emission source (in the example, the emission source is a node 2) according to the UI information in the received signal, so that the information maintenance and management of the smart grid are facilitated;
and 4, step 4: the controller 1 adaptively matches an optimal communication scheme according to the distance between the controller and the communication node 3, the requirement on communication quality, the equipment deployment condition and the like;
and 5: the communication scheme in the step 4 points to a certain network protocol in power line communication, micro-power wireless communication and NB-IoT three networks, and modulates signals according to the corresponding protocol;
step 6: the controller 1 sends the modulated signal to a target communication node in a selected form, and adds UI information of the node in the signal, so that the node 3 can conveniently identify the identity;
and 7: the controller 3 operates in a manner following steps 1-5.
In step 5, each communication scheme is as follows:
the power line communication scheme is used for sequentially carrying out scrambling, Turbo coding, channel interleaving, diversity copying, constellation point mapping and OFDM modulation on an original information sequence, and completely supporting the technical specification of interconnection and intercommunication of low-voltage power line broadband carrier communication of national power grid companies;
the micropower wireless communication scheme sequentially performs whitening coding and GFSK modulation on an original information sequence, and completely supports the specification of a micropower wireless power information acquisition system of a national grid company;
the NB-IoT communication scheme carries out scrambling, modulation, layer mapping, precoding and OFDM modulation on the original information sequence in sequence, and completely supports a narrow-band IoT NB-IoT protocol.
Accordingly, in step 2, the demodulation algorithm for each signal type is as follows:
the power line signal needs to be subjected to OFDM demodulation, signal demodulation, diversity combination, channel de-interleaving, Turbo decoding and descrambling to obtain an original information sequence;
the micropower wireless signal needs to be subjected to whitening decoding and GFSK demodulation to obtain an original information sequence;
the NB-IoT signal needs to be demodulated and pre-decoded through OFDM to obtain an original information sequence.
Claims (3)
1. A heterogeneous convergence fabric for a smart grid, characterized in that: a controller developed based on an SDN is built in a communication node of a core and is connected with a power line communication network, a micro-power wireless communication network and an NB-IoT three-network to support the receiving, modulation and transmission of signals; the controller can receive and transmit three-network signals, and can process and switch the received signals into any one of the three networks to be transmitted; the controller in the communication node can identify and authenticate the received signal, the channel source and the signal type are mainly identified through the analysis of the leader sequence, and the identification and authentication of the emission source are carried out through the user identity identifier of each communication node; the controller allocates communication schemes in a self-adaptive manner according to the signal transmitting target node, including a channel selection and signal modulation mode, and allocates frequency bands and subcarriers according to the corresponding communication schemes; the controller works in the communication node according to the following principle:
step 1: performing signal identification according to the preamble of the received signal, and judging that the signal type is one of power line communication, micro-power wireless communication and NB-IoT;
step 2: demodulating the received signal according to the signal type judged in the step 1 to judge an original information sequence;
and step 3: judging a signal emission source according to UI information in the received signal, so that information maintenance and management of the smart grid are facilitated;
and 4, step 4: according to the distance of a transmitting target node of a signal in the next step, the requirement on communication quality and the equipment deployment condition, an optimal communication scheme is adaptively matched;
and 5: the communication scheme in the step 4 points to a certain network protocol in power line communication, micro-power wireless communication and NB-IoT three networks, and modulates signals according to the corresponding protocol;
step 6: and sending the modulated signal to a target communication node in a selected form, and adding UI information of the node into the signal so as to facilitate the identity recognition of the next node.
2. The heterogeneous convergence fabric for the smart grid according to claim 1, wherein: the communication scheme includes a power line communication scheme, a micro-power wireless communication scheme, and an NB-IoT communication scheme;
the power line communication scheme is used for sequentially carrying out scrambling, Turbo coding, channel interleaving, diversity copying, constellation point mapping and OFDM modulation on an original information sequence, and completely supporting the technical specification of interconnection and intercommunication of low-voltage power line broadband carrier communication of a national power grid company; the micropower wireless communication scheme sequentially performs whitening coding and GFSK modulation on an original information sequence, and completely supports the specification of a micropower wireless power information acquisition system of a national power grid company; the NB-IoT communication scheme carries out scrambling, modulation, layer mapping, precoding and OFDM modulation on the original information sequence in sequence, and completely supports a narrow-band IoT NB-IoT protocol.
3. The heterogeneous convergence fabric for the smart grid according to claim 1, wherein: the signal types include power line signals, micro-power wireless signals, and NB-IoT signals; the power line signal needs to be subjected to OFDM demodulation, signal demodulation, diversity combination, channel de-interleaving, Turbo decoding and descrambling to obtain an original information sequence;
the micropower wireless signal needs to be subjected to whitening decoding and GFSK demodulation to obtain an original information sequence;
and the NB-IoT signal needs to be demodulated and pre-decoded through OFDM to obtain an original information sequence.
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| CN107657797A (en) * | 2017-08-21 | 2018-02-02 | 胡书恺 | A kind of multilist centralized meter-reading system |
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| CN107657797A (en) * | 2017-08-21 | 2018-02-02 | 胡书恺 | A kind of multilist centralized meter-reading system |
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Inventor after: Yue Yuning Inventor after: Yang Honglin Inventor after: Wang Guhong Inventor after: Guo Lingyan Inventor after: Zhu Minghui Inventor after: Xiong Jing Inventor after: Hua Jian Inventor after: Zhong Zhijian Inventor after: Zhong Li Inventor after: Wang Haiquan Inventor after: Li Jian Inventor after: Wu Yongpeng Inventor after: Liu Xuhai Inventor after: Qian Yongan Inventor after: Zhang Xihe Inventor after: Chen Shuiping Inventor after: Gao Siyuan Inventor after: Cheng Mengyuan Inventor after: Pan Qian Inventor before: Yue Yuning Inventor before: Wang Guhong Inventor before: Guo Lingyan Inventor before: Zhu Minghui Inventor before: Xiong Jing Inventor before: Zhong Zhijian Inventor before: Zhong Li Inventor before: Wang Haiquan Inventor before: Hua Jian Inventor before: Li Jian Inventor before: Qian Yongan Inventor before: Liu Xuhai Inventor before: Gao Siyuan Inventor before: Cheng Mengyuan Inventor before: Zhang Xihe Inventor before: Chen Shuiping Inventor before: Yang Honglin Inventor before: Pan Qian |
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