CN107809475B - Multi-source information interaction method of energy internet physical information system - Google Patents
Multi-source information interaction method of energy internet physical information system Download PDFInfo
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- CN107809475B CN107809475B CN201710979418.5A CN201710979418A CN107809475B CN 107809475 B CN107809475 B CN 107809475B CN 201710979418 A CN201710979418 A CN 201710979418A CN 107809475 B CN107809475 B CN 107809475B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/566—Grouping or aggregating service requests, e.g. for unified processing
Abstract
The invention relates to a multi-source information interaction method of an energy Internet physical information system, which is characterized in that the establishment of a communication protocol is completed between a server and a client, so that the establishment of communication between the server and the client is completed; when communication is carried out after communication is established, a secondary handshake protocol is used for ensuring the integrity of data; and the communication among all the components of the physical information system is realized through a publishing and subscribing mechanism. The invention greatly saves the cost and can realize the analog quantity data transmission which can not be realized by single connection; remote maintenance and monitoring can be realized through the Internet, and data exchange, identification and control among all devices of the physical information system, between the devices and the server and between the server and the server are realized; through a subscription and release mechanism, all members in the physical information system can equally send and receive information and mutually interact and communicate.
Description
Technical Field
The invention belongs to the technical field of electrical information, and particularly relates to a multi-source information interaction method of an energy internet physical information system.
Background
The energy internet is a novel Information-energy fusion 'wide area network' constructed in the internet concept, and emphasizes that bidirectional demand-based transmission and dynamic balance use of multiple energy sources such as a power grid, an oil and gas pipe network, an air network and a heating power network are realized by an open peer-to-peer Information-energy integrated architecture, so that the interconnection of the energy networks, the integration of the internet and Information Communication (ICT) Technology and an energy system are important keys for realizing the energy internet. As shown in fig. 1.
As can be seen from the above, peer-to-peer opening, plug and play, wide distribution, bidirectional transmission, and high intelligence are important features of the energy internet, and it is anticipated that a high-level measurement system characterized by intelligent measurement devices, novel state sensors, and internet of things will be distributed throughout each link of the regional energy internet, and the energy internet will contain communication and interaction of mass operation data composed of various energy sources such as cold, heat, electricity, gas, etc., since the information interaction protocols between each constituent unit and the energy network are various, if a traditional centralized and hierarchically distributed communication mode is still adopted, it will be difficult to realize flexible and effective information interaction between each constituent unit.
Disclosure of Invention
The problems to be solved by the invention are as follows: the method for multi-source information interaction of the energy Internet physical information system overcomes the defects of the prior art, adopts a communication mechanism of publishing and subscribing to embody the peer-to-peer and open characteristics of various energy networks, and realizes data exchange, identification and control among devices of the physical information system, between devices and a server and between the server and the server in a unified modeling mode; meanwhile, the communication logic among all members in the physical information system can be greatly simplified, point-to-point and point-to-multipoint communication sessions are conveniently realized, the conventional communication through a plurality of different communication lines is replaced, the cost is greatly saved, the efficiency and the reliability of data and information interaction are improved, and a basic support is provided for multi-source coordination and optimization of the energy Internet.
The technical scheme of the invention is as follows: a multi-source information interaction method of an energy Internet physical information system is provided. The energy Internet physical information system comprises a plurality of units, wherein the units are connected in an equal communication manner through a publishing and subscribing mechanism, the units in the energy Internet physical information system comprise any one of the units capable of independently completing the function in the energy Internet physical information system, and can be a thermal power plant, a wind power plant, a fan, a photovoltaic power station, an inverter, an energy network line, a data acquisition device, a knife switch controller, a computing center, a trading center or a control center in the energy Internet; each constituent unit communicates with other constituent units by issuing messages, the steps being as follows:
(1) completing the establishment of a communication protocol between the publish-subscribe server and the composition unit, thereby completing the establishment of communication between the publish-subscribe server and the composition unit;
(2) when communication is carried out after communication is established, information interaction among the composition units is transferred through the publish-subscribe server to realize one-to-one, one-to-many and many-to-one information interaction, and the communication between the composition units and the publish-subscribe server ensures the integrity of data through a secondary handshake protocol;
(3) after the communication is established, the information interaction among all the components of the physical information system is realized through a publishing and subscribing mechanism.
The communication protocol in the step (1) is in a character string form, all parts of the content of the communication protocol are separated by an 'I' character, the first part of the character string represents the type of the communication protocol, and the later parts are respectively defined according to different types of the communication protocol. The communication protocol format comprises a command information protocol format, an alarm information protocol format, a real-time data information protocol format and a remote control data information protocol format; the command information protocol format is used for one component unit to send a command request to another component unit; the alarm information protocol format is used for the composition unit to issue own alarm information to the network, wherein the real-time data information protocol format is used for the composition unit to send real-time measurement data to other composition units in the energy Internet physical information system network, and the remote control data information protocol format is used for the composition unit to request to control another composition unit;
the command information protocol format is: "CMD | receiver Name | sender Name | send time | command Name | command parameter";
and (3) alarm information protocol format: "ALARM | sender Name | ALARM time | ALARM level | ALARM content";
real-time data information protocol format: "RTDATA | receiver Name | sender Name | transmission time | data point Name ═ data value; the data point name is a data value; … …, respectively; data point name ═ data value ";
remote control data information protocol format: "RC | receiver Name | sender Name | send time | remote control action identification".
The two-way handshake protocol in step (2) includes:
(21) sending a request signal to the publish-subscribe server through the composition unit, and returning a response confirmation signal of the publish-subscribe server to the composition unit to ensure the establishment of communication;
(22) the composition unit sends a fixed-length data packet to the publish-subscribe server, and the publish-subscribe server returns the received data packet to the composition unit for secondary confirmation and returns a confirmation signal;
(23) the publishing and subscribing server sends a fixed-length data packet to the client, and the composition unit returns the received data packet to the publishing and subscribing server for secondary confirmation and returns a confirmation signal.
In the step (3), the information interaction among the components of the physical information system is realized through a publish-subscribe mechanism, which is specifically realized as follows:
(1) each composition unit is connected with the publish-subscribe server and subscribes the information type concerned by each composition unit to the publish-subscribe server; the information types specifically comprise commands, remote measurement, remote control and alarm;
(2) after receiving data of a certain information type, the publishing and subscribing server forwards the information to a component unit subscribing the information of the type;
(3) after receiving the information forwarded by the publish-subscribe server, the composition unit analyzes and executes the information;
(4) when the component unit needs to send information to one or more other component units in the energy Internet physical information system, the component unit packages the information according to a format specified in a communication protocol and sends the information to a publish-subscribe server.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts a communication mechanism of publishing and subscribing, embodies the peer-to-peer and open characteristics of various energy networks, and realizes the exchange, identification and control of data among all devices of a physical information system, between the devices and a server and between the server and the server in a unified modeling mode; meanwhile, the communication logic among all members in the physical information system can be greatly simplified, point-to-point and point-to-multipoint communication sessions are conveniently realized, the traditional communication through a plurality of different communication lines is replaced, the cost is greatly saved, and the efficiency and the reliability of data and information interaction are improved.
(2) The invention realizes high-efficiency and equal information interaction among all the constituent units in the energy Internet physical information system, including request control, data sending and the like, is convenient for an optimized calculation unit in the system to monitor data, and provides support for multi-source coordination and optimization of the regional energy Internet.
(3) Through a uniform mode, data exchange, identification and control among all devices of the physical information system, between the devices and the server and between the server and the server are realized.
(4) Each member in the physical information system can equally send and receive information, and mutually interact and communicate, so that the optimized calculation in the physical information system can monitor the data in the system conveniently, remote maintenance and monitoring can be realized through the Internet, and the reliability of data and information interaction is further improved.
Drawings
FIG. 1 is a schematic diagram of an energy Internet physical information system;
FIG. 2 is a flow chart of a two-way handshake protocol according to the present invention;
FIG. 3 is a subscription and publishing mechanism for information interaction according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The multi-source information interaction method of the energy Internet physical information system can be used for optimizing scheduling control of regional energy Internet and intelligent power distribution network. The invention comprises the following steps;
(1) the energy Internet physical information system comprises all the components, and establishes equal communication connection through a publishing and subscribing mechanism;
(2) the integrity of data is ensured by using a secondary handshake protocol in the communication process;
(3) the sender encapsulates the information to be exchanged into a data frame in a format defined in the text, and sends the data frame to the message server through a lower layer transmission protocol.
(4) The message server forwards the information to the recipient according to the recipient information in the data frame.
A schematic diagram of an energy internet physical information system is given in fig. 1.
A typical energy internet is schematically shown in fig. 1, and includes three layers of structures, namely a physical layer, an information layer and an application layer:
● the bottom layer is the physical layer of the energy internet, which mainly emphasizes the realization of the interconnection and mutual conversion of physical flows of various energy forms in a network. The wide interconnection inside the network is a necessary route for realizing the energy Internet; the establishment of interconversion interfaces among various energy systems is the physical basis for interconnection and complementation of multiple energy sources. The energy internet physical information system composition unit in the energy internet physical layer comprises: the system comprises physical systems such as a thermal power plant, a large wind power plant, a large photovoltaic power station, a nuclear power station, distributed photovoltaic, an intelligent building, an electric vehicle charging station, and an energy network connected with the physical systems.
● the middle layer is the information layer of the energy internet, which emphasizes "internet + energy" mainly from the information flow perspective. The method not only comprises the physical information fusion of an energy system, but also comprises the integration of an internet business mode into the energy industry and the like. The information layer of the energy Internet comprises the following components: a data collector at a production side, a system controller at the production side, a data collector at a user side, a controller at the user side, a computer, a server and the like in an information network.
● the top layer is the application layer of the energy internet, which mainly emphasizes the realization of the optimization analysis and advanced decision of the structure, operation and equipment form of the energy system by the value system and the realization mode of opening, interconnection, peer-to-peer, sharing, etc. The components in the application layer of the energy Internet comprise a computing center, a control center, a data collector in a trading center, an operation controller and the like.
As shown in fig. 2, after the communication is established, the integrity of the data is guaranteed by using a two-way handshake protocol, which includes the following steps:
(1) the sender sends a request signal to the receiver, and the receiver responds to a confirmation signal and returns the confirmation signal to the sender, so that communication establishment is ensured, and waste of communication resources is avoided;
(2) the sender sends a data packet to the receiver, and the receiver calculates the received data packet and then returns a check code to the sender for secondary confirmation and returns a confirmation signal;
(3) the receiver sends the data packet to the sender, and the sender calculates the received data packet and then returns the check code to the receiver for secondary confirmation and returns a confirmation signal.
As shown in fig. 3, each component unit in the energy internet physical information system can be used as a publisher and can also be used as a receiver to communicate with a publish-subscribe server.
The information can be sent to a publish-subscribe server as a publisher, and the publish-subscribe server forwards the information to all receivers subscribing the topic; the composition unit as a receiver can subscribe the topic concerned by the receiver from the publish-subscribe server, and the publish-subscribe server forwards the information to the receiver end subscribed with the topic in real time when receiving the information of the topic.
Each member of the physical information system can act as both a publisher and a recipient. All members are in equal low order and transmit information, send command, send telemetering data and alarm information through a publish-subscribe mechanism.
For example: the distributed photovoltaic power generation units and the like transmit real-time power generation data of the distributed photovoltaic power generation units, such as active power, reactive power, frequency and the like, to a publishing and subscribing server through a real-time data information protocol, and the publishing and subscribing server pushes the data to system composition units which subscribe the information, such as a computing center, a control center and an energy network; the distributed photovoltaic power generation units and the like can simultaneously release alarm information such as voltage overrun and equipment abnormality to an information network through a publishing and subscribing server by using an alarm information protocol, and after receiving the information, the control center can recalculate operation parameters according to the situation and send the new operation parameters to related power generation units through a publishing information server by using a remote control data information protocol; and sending the strategy adjusting command to a relevant power generation unit through a command information protocol.
The calculation center receives various information in the network by subscribing the real-time data information and the alarm information and processes a large amount of data to obtain big data calculation results required by the trading center and the control center, such as network loss, optimal electricity price, day-ahead operation strategy of a thermal power plant, participation of intelligent equipment in a load transfer scheme, a peak load shifting scheme, a valley load shifting scheme and the like, and the calculation results are issued to the information network through a real-time data information protocol.
The control center obtains the running state of each component unit in the energy network and the optimized calculation result of the calculation center by subscribing the real-time data information and the alarm information, and sends the control information to the relevant system component units by a command information protocol and a remote control data information protocol after logical operation.
The above examples are provided only for the purpose of describing the present invention, and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims. Various equivalent substitutions and modifications can be made without departing from the spirit and principles of the invention, and are intended to be within the scope of the invention.
Claims (1)
1. A multi-source information interaction method of an energy Internet physical information system is characterized in that: the energy Internet physical information system comprises a plurality of constituent units, wherein the constituent units are established with equal communication connection through a publishing and subscribing mechanism, each constituent unit comprises any unit capable of independently completing the function in the energy Internet physical information system, and the constituent units can be a thermal power plant, a wind power plant, a fan, a photovoltaic power station, an inverter, an energy network line, a data acquisition device, a knife switch controller, a calculation center, a transaction center or a control center in the energy Internet; each constituent unit communicates with other constituent units in a message issuing manner;
the method comprises the following steps:
(1) completing the establishment of a communication protocol between the publish-subscribe server and the composition unit, thereby completing the establishment of communication between the publish-subscribe server and the composition unit;
(2) when communication is carried out after communication is established, information interaction among the composition units is transferred through the publish-subscribe server to realize one-to-one, one-to-many and many-to-one information interaction, and the communication between the composition units and the publish-subscribe server ensures the integrity of data through a secondary handshake protocol;
(3) after communication is established, information interaction among all components of the physical information system is realized through a publishing and subscribing mechanism;
the two-way handshake protocol in step (2) includes:
(21) sending a request signal to the publish-subscribe server through the composition unit, and returning a response confirmation signal of the publish-subscribe server to the composition unit to ensure the establishment of communication;
(22) the composition unit sends a fixed-length data packet to the publish-subscribe server, and the publish-subscribe server returns the received data packet to the composition unit for secondary confirmation and returns a confirmation signal;
(23) the publishing and subscribing server sends a fixed-length data packet to the client, and the composition unit returns the received data packet to the publishing and subscribing server for secondary confirmation and returns a confirmation signal;
the communication protocol in the step (1) is in a character string form, all parts of the content of the communication protocol are separated by an 'I' character, the first part of the character string represents the type of the communication protocol, the later parts are respectively defined according to different communication protocol types, and the different communication protocol types comprise a command information protocol format, an alarm information protocol format, a real-time data information protocol format and a remote control data information protocol format; the command information protocol format is used for sending a command request to another constituent unit by one constituent unit, the alarm information protocol format is used for the constituent unit to issue own alarm information to a network, the real-time data information protocol format is used for the constituent unit to send real-time measurement data to other constituent units in an energy internet physical information system network, and the remote control data information protocol format is used for the constituent unit to request to control the other constituent unit;
the command information protocol format is as follows: "CMD | receiver Name | sender Name | send time | command Name | command parameter";
the alarm information protocol format is as follows: "ALARM | sender Name | ALARM time | ALARM level | ALARM content";
the real-time data information protocol format: "RTDATA | receiver Name | sender Name | sending time | data point Name = data value," data point Name = data value "", "… …" "," data point Name = data value "";
the remote control data information protocol format is as follows: "RC | receiver Name | sender Name | sending time | remote control action identification";
in the step (3), the information interaction among the components of the physical information system is realized through a publish-subscribe mechanism, which is specifically realized as follows:
(1) each composition unit is connected with the publish-subscribe server and subscribes the information type concerned by each composition unit to the publish-subscribe server; the information types specifically comprise commands, remote measurement, remote control and alarm;
(2) after receiving data of a certain information type, the publishing and subscribing server forwards the information to a component unit subscribing the information of the type;
(3) after receiving the information forwarded by the publish-subscribe server, the composition unit analyzes and executes the information;
(4) when the component unit needs to send information to one or more other component units in the energy Internet physical information system, the component unit packages the information according to a format specified in a communication protocol and sends the information to a publish-subscribe server.
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| CN108737563A (en) * | 2018-06-12 | 2018-11-02 | 合肥汇英科技有限公司 | A kind of multi-source information exchange method of energy internet physical message system |
| CN111224464B (en) * | 2018-11-27 | 2022-07-19 | 鼎桥通信技术有限公司 | Management control information transmission method and system for multiple inverters |
| CN111319035B (en) * | 2018-12-14 | 2022-11-08 | 中国科学院沈阳自动化研究所 | Robot control system construction method for realizing modular communication |
| CN111103570B (en) * | 2019-11-04 | 2023-04-28 | 航天南湖电子信息技术股份有限公司 | Radar real-time signal processing application software system |
| CN114625052A (en) * | 2022-03-28 | 2022-06-14 | 国网北京市电力公司 | Cold-hot electric control system and method for multi-station fusion system |
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