CN106789172B - Power distribution network communication system - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
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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
- H04L41/08—Configuration management of networks or network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/741—Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/806—Broadcast or multicast traffic
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] 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
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
Abstract
The invention discloses a network communication system of a power distribution network, which comprises: the neighborhood network unit comprises a field router, a distribution network automation system and a plurality of workflow management terminals; the NOC network operation center comprises a CG-NMS platform, a NOC application server and a NOC network server, calls or stores data, and the NOC application server is connected with the NOC network server; a wide area network unit including a secure access module and a communication line. According to the power distribution network communication system, the field network unit is set into the field router, the distribution network automation system and the workflow management terminal, so that the effect of mutual communication among the terminals can be realized, the effect of terminal transmission communication flow can be realized through the arrangement of the NOC network operation center and the wide area network unit, resources such as internal memory occupied by communication are reduced, and the requirement of power grid transportation is met.
Description
Technology neighborhood
The invention relates to a communication mode, in particular to a power distribution network communication system.
Background
Because a large number of nodes are arranged in a power distribution system of a power grid, along with the increase of equipment and the diversification of the equipment, the acquisition, the monitoring, the management and the fault removal of the information of each node are greatly difficult. The method has the advantages that the information of each node device is timely and effectively acquired, the utilization efficiency and the safety level of electric power energy are improved, and the method is a difficult problem for all power grid companies.
In different environments, different communication modes such as wired, wireless, 3G or 4G may be deployed, and the different communication modes increase the difficulty in system compatibility and background data collection conversion.
When data is transmitted over low power and lossy networks (LLNs), the transmission rate may explode to 60% -90% of the total link bandwidth, causing unpredictable errors or connection loss.
Due to the lack of characteristics of NSF and ISSU in the power grid configuration network, the node failure rate is significantly higher than that of nodes in a traditional IP (Internet protocol) network. The traditional protocol cannot meet the interconnection of a large number of devices and cannot meet the networking requirements of a high-constraint and unstable environment.
The above problems can be solved by means of the internet of things, but with IP intelligentization of objects of the internet of things, various types of nodes can be mixed to a communication infrastructure. The routing protocol must manage the traffic path based on the capabilities of the nodes and the power distribution automation smart terminal must be able to transmit the communication traffic. The last mile devices installed at the end of the network, unlike PCs and servers, have powerful computing and storage capabilities, and their resources in terms of power, CPU, memory and storage are very limited. Therefore, the embedded network protocol stack must strive to be limited to a few K bits of flash memory and a few tens of K bits, and at the same time, the routing protocol must manage traffic paths based on the capabilities of the nodes, and the power distribution automation intelligent terminal must be capable of transmitting communication traffic, but the existing terminal communication structure cannot meet the requirements.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a power distribution network communication system which can reduce the occupation of resources such as a terminal CPU (central processing unit), a memory and the like.
In order to achieve the purpose, the invention provides the following technical scheme: a power distribution network communication system, comprising:
the neighborhood network unit comprises a field router, a distribution network automation system and a plurality of workflow management terminals, wherein the distribution network automation system and the workflow management terminals are connected with the field router, the connection mode of the workflow management terminals and the field router is Ethernet or serial ports or WiFi or RF Mesh or PLC Mesh, and a communication protocol running among the field router, the distribution network automation system and the workflow management terminals is a low-power lossy network protocol RPL;
the system comprises an NOC network operation center, a CG-NMS platform, an NOC application server and an NOC network server, wherein the CG-NMS platform comprises a front end user interface and a back end database, the front end user interface and the back end database are both carried in the NOC application server, the front end user interface runs in a Red Hat Linux system, the back end database is an Oracle database, the front end user interface is used for human-computer interaction, communicates with the back end database through the Red Hat Linux system, calls or stores data, and the NOC application server is connected with the NOC network server;
the wide area network unit comprises a safety access module and a communication line, wherein the communication line is an optical fiber or an Ethernet or a Worldwide Interoperability for Microwave Access (WiMAX) or 3G/4G, the communication line is connected with a field router and a network communications Network (NOC) network server, and the safety access module is arranged at one end of the communication line connected with the field router.
As a further improvement of the present invention, the traffic model of the communication line is as follows:
point-to-multipoint: the traffic from the NOC network server to the distribution network automation system supports unicast and multicast of IPv4/IPv6 and SCADA protocol through protocol conversion.
Multipoint to multipoint: traffic from the workflow management terminal to the NOC network server.
Point-to-point: traffic between external substations, besides IPv4/IPv6, supports two-layer IEC 61580GOOSE/SV, and communication between automatic closing switch controllers, uses WiMAX CPE to WiMAX base station of the substation.
As a further improvement of the present invention, the security access module includes a certificate identification layer, a network admission control layer, a user management layer, a data security layer, a key management layer, a routing and traffic filter layer, a security isolation layer, and a physical security layer, and the certificate identification layer, the network admission control layer, the user management layer, the data security layer, the key management layer, the routing and traffic filter layer, the security isolation layer, and the physical security layer are sequentially connected to each other, wherein data enters from the certificate identification layer, passes through the network admission control layer, the user management layer, the data security layer, the key management layer, the routing and traffic filter layer, and the security isolation layer, and then is output from the physical security layer.
As a further improvement of the invention, the workflow management terminal uses a Push mode based on CoAP, the SNMP of the field router uses a Push mode, and the Netflow/IPfix in the communication line uses a Push mode;
the CoAP is an application layer protocol, the Push mode is a real-time playing mode, the SNMP is a network management protocol, the Pull mode is a playback mode, and the Netflow/IPfix is IP data flow information output.
As a further improvement of the present invention, the low-power lossy network protocol RPL protocol flow is as follows:
using 902 to 928MHz frequency band, every 400kHz interval, and totally 64 non-overlapping frequency bands;
running an Ethernet protocol of Ipv4/IPv6, and running IEC60870-5-104 in three layers to provide communication between the distribution network automation system and the workflow management terminal;
the serial port supports RS-232/RS-485 to provide communication between a workflow management terminal and a field router, and the equipment conforms to IEC 60870-5-101;
remote workflow management is carried out through a wire or a WiFI wireless network carried by the CGR 1000;
and (3) constructing a NAN neighborhood network by using a CG-Mesh technology to support end-to-end IPv6 communication.
The beneficial effects of the invention are that by setting the neighborhood network units as the field router, the distribution network automation system and the workflow management terminal, the work information of the power grid can be collected by the distribution network automation system and the workflow management terminal, and the communication protocol running among the three is the low-power lossy network protocol RPL, so that the terminal CPU and the memory resource occupied by the communication among the three can be effectively reduced, thus the problem that the terminal can not work well due to the excessive terminal CPU and memory resource occupied by the communication can not occur, and by setting the NOC network operation center and the wide area network units, the field router can communicate with the NOC network operation center through the wide area network units, transmit the data to the NOC network operation center, set the wide area network units as the safe access module and the communication line, and effectively realize the function of transmitting the communication flow by utilizing the communication line, the safety access module can improve the safety of communication flow transmission, the NOC network operation center is set to be a CG-NMS platform, a NOC application server and a NOC network server, the NOC network server can be used for communicating with a communication line, the NOC application server and the CG-NMS platform are used for achieving interaction between data and people, and the effect that the people process the data through the CG-NMS platform after receiving the data is achieved.
Drawings
Fig. 1 is a block diagram of a power distribution network communication system according to the present invention;
fig. 2 is a block diagram of the security access module of fig. 1.
Detailed Description
The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.
Referring to fig. 1 to 2, a power distribution network communication system according to this embodiment is characterized in that: the method comprises the following steps: the neighborhood network unit 1 comprises a field router 11, a distribution network automation system 12 and a plurality of workflow management terminals 13, wherein the distribution network automation system 12 and the workflow management terminals 13 are connected with the field router 11, the connection mode of the workflow management terminals 13 and the field router 11 is Ethernet or serial ports or WiFi or RF Mesh or PLC Mesh, and a communication protocol running among the field router 11, the distribution network automation system 12 and the workflow management terminals 13 is a low-power lossy network protocol RPL;
the NOC network operation center 2 comprises a CG-NMS platform 21, a NOC application server 22 and a NOC network server 23, wherein the CG-NMS platform 21 comprises a front end user interface 211 and a back end database 212, the front end user interface 211 and the back end database 212 are both carried in the NOC application server 22, the front end user interface 211 runs in a RedHat Linux system, the back end database 212 is an Oracle database, the front end user interface 211 is used for man-machine interaction, communicates with the back end database 212 through the RedHat Linux system, calls or stores data, and the NOC application server 22 is connected with the NOC network server 23;
a wide area network unit 3, the wide area network unit 3 includes a security access module 31 and a communication line 32, the communication line 32 is an optical fiber or an ethernet or a worldwide interoperability for microwave access WiMAX or 3G/4G, the communication line 32 connects the field router 11 and the NOC network server 23, the security access module 31 is disposed at one end of the communication line 32 connected to the field router 11, during the signal transmission of the distribution network, the distribution automation system 12 collects the power grid information, the work flow management terminal 13 collects the human operation information, the two kinds of information are transmitted to the field router 11 through a low power lossy network protocol RPL, then the information data in the field router 11 are transmitted to the NOC network server 23 through the communication line 32, and then transmitted to the NOC application server 22 through the NOC network server, the user can process and store the data through a front end user interface 211 and a back end data 212, the communication of the information data is effectively completed, because the communication between the distribution network automation system 12 and the workflow management terminal 13 and the field domain router 11 is realized by using the low-power lossy network protocol RPL in the communication process, the CPU and the memory resources of the terminal occupied by the communication can be effectively reduced, the light weight of the communication structure is realized, the harsh operating environment is met, meanwhile, the communication between the front-end user interface 211 and the back-end database 212 utilizes Red Hat Linux, compared with the existing operating system, the operation space occupied by the CPU occupied by the Red Hat Linux is small, the requirement is small, therefore, the whole NOC application server 22 can be set as a mobile terminal, the whole communication structure becomes light weight, the harsh operating environment is met, and the communication safety can be effectively protected by the existence of the safety access module 31, the communication environment is safer and more reliable.
As an improved specific embodiment, the flow model of the communication line 32 is as follows:
point-to-multipoint: traffic from the NOC network server 23 to the distribution network automation system 12 supports unicast and multicast of IPv4/IPv6, and supports SCADA protocol by protocol conversion.
Multipoint to multipoint: traffic from the workflow management terminal 13 to the NOC network server 23.
Point-to-point: besides supporting IEC 61580GOOSE/SV of a second layer and communication between automatic closing switch controllers in addition to IPv4/IPv6, the flow between external substations uses WiMAX CPE to WiMAX base stations of the substations, when the communication line 23 meets the flow model, the effect that the communication line 23 can effectively transmit communication flow can be effectively realized, and therefore the requirements needed in the terminal communication process can be better met.
As an improved specific embodiment, the security access module 31 includes a certificate identification layer, a network admission control layer, a user management layer, a data security layer, a key management layer, a routing and traffic filtering layer, a security isolation layer and a physical security layer, which are connected in sequence, wherein data enters from the certificate identification layer, passes through the network admission control layer, the user management layer, the data security layer, the key management layer, the routing and traffic filtering layer and the security isolation layer, and then is output from the physical security layer, and multiple protection effects can be achieved through the settings of the certificate identification layer, the network admission control layer, the user management layer, the data security layer, the key management layer, the routing and traffic filtering layer, the security isolation layer and the physical security layer, therefore, the effect of safety verification of each information in the data can be realized by adopting the arrangement of the plurality of layers, so that the effect of safety verification of each information in the data can be realized by utilizing each layer, and the safety protection effect of the information data can be better realized.
As a specific embodiment of the improvement, the workflow management terminal 31 uses a Push mode based on CoAP, the SNMP of the field router 11 uses a Pull mode, and the Netflow/IPfix in the communication line 32 uses a Push mode;
the CoAP is an application layer protocol, the Push mode is a real-time playing mode, the SNMP is a network management protocol, the Pull mode is a playback mode, the Netflow/IPfix is IP data flow information output, the workflow management terminal 31 is set to be the Push mode based on the CoAP, the SNMP of the field router 11 uses the Push mode and the Netflow/IPfix in the communication line 32 uses the Push mode, management of a flow path can be achieved by the field router 11 and the workflow management terminal 31, and the requirement of power grid terminal communication is met.
As an improved specific implementation, the low-power lossy network protocol RPL protocol flow is as follows:
using 902 to 928MHz frequency band, every 400kHz interval, and totally 64 non-overlapping frequency bands;
running the Ethernet protocol of Ipv4/IPv6, and three layers running IEC60870-5-104 provide communication between distribution network automation system 12 and workflow management terminal 13;
the serial port supports RS-232/RS-485 to provide communication between the workflow management terminal 13 and the field router 11, and the equipment conforms to IEC 60870-5-101;
remote workflow management is carried out through a wire or a WiFI wireless network carried by the CGR 1000;
the NAN neighborhood network is established by using CG-Mesh technology to support end-to-end IPv6 communication, the open standard and interoperability can be ensured by using 30-year Internet protocol technology [ RFC 6272] by adopting an end-to-end IP intelligent grid architecture, and the NAN neighborhood network has the following advantages by adopting an IP-based neighborhood network which is proved by two billion end users to a great extent:
open and standards-based networks, the core component layers of transport and applications are standardized by the internet engineering task force IETF, while the critical physical layer, data link, is standardized by the usual industry organizations and proposes application protocols.
Light weight, meeting harsh operating environment
Universal multi-service communication capability
The layered IP architecture has sufficient capacity to cope with any type of physical and data link layer, making it future-oriented. Various media may be used in a deployment without changing the architecture and data flow of the overall solution.
Everywhere is absent
All recent versions of operating systems, from personal computers and servers to lightweight embedded systems, have an integrated dual-IPIPv 4 and IPv6 stack, which makes a new network function deployment easier to implement.
Scalable large-scale terminal access
With the widespread use of the internet, IP has been deployed and tested on a large scale, and strong scalability has been enabled to support millions of private or public IP infrastructure nodes, similar to the expected field area network FAN deployment under a unified management, which has been in operation for many years.
Manageability and Security
The communication infrastructure requires appropriate management and security functions for proper operation, and IP networks have mature network management and security protocols, mechanisms and toolsets. Network management business applications that help electric utilities operate utilize network management tools to improve their services, such as identifying when a power outage, with the help of an inter-grid network management system CG-NMS.
Terminal-to-terminal
IP networks are employed to provide end-to-end bi-directional communication capabilities between any devices. The data operation of a centralized or distributed architecture is realized according to business requirements. The intermediate protocols are reduced, and the translation gateway between the protocols is removed, so that new services are introduced to reduce the utilization of resources such as a CPU (central processing unit) and a memory of the Wenzhou power distribution automation terminal.
In summary, in the power distribution network communication system of the present invention, the neighborhood network unit 1 is set as the field router 11, the distribution automation system 12 and the workflow management terminal 13, so that the power grid information can be collected by the distribution automation system 12, the operation information of the staff is collected by the workflow management terminal 13, and the three are communicated by the low-power lossy network protocol RPL, so that the CPU and the memory resources occupied by the communication can be effectively reduced, and the NOC network operation center 2 is set as the CG-NMS platform 21, the NOC application server 22 and the NOC network server 23, and can be matched with the communication line 32 to achieve the effect of transmitting the communication traffic, so that the communication requirements of the power grid can be effectively met.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the skill of the art may be made without departing from the principles of the present invention, and such modifications and embellishments should also be considered as within the scope of the present invention.
Claims (7)
1. A power distribution network communication system is characterized in that: the method comprises the following steps:
the neighborhood network unit (1) comprises a field router (11), a distribution network automation system (12) and a plurality of workflow management terminals (13), wherein the distribution network automation system (12) and the workflow management terminals (13) are connected with the field router (11), the workflow management terminals (13) are connected with the field router (11) in an Ethernet or serial port or WiFi or RF Mesh or PLC Mesh mode, and a communication protocol running among the field router (11), the distribution network automation system (12) and the workflow management terminals (13) is a low-power lossy network protocol RPL;
the NOC network operation center (2), the NOC network operation center (2) comprises a CG-NMS platform (21), a NOC application server (22) and a NOC network server (23), the CG-NMS platform (21) comprises a front end user interface (211) and a back end database (212), the front end user interface (211) and the back end database (212) are loaded in the NOC application server (22), the front end user interface (211) runs in a Red Hat Linux system, the back end database (212) is an Oracle database, the front end user interface (211) is used for human-computer interaction, communicates with the back end database (212) through the Red Hat Linux system to call or store data, and the NOC application server (22) is connected with the NOC network server (23);
the wide area network unit (3), the wide area network unit (3) includes a secure access module (31) and a communication line (32), the communication line (32) is an optical fiber or an Ethernet or a worldwide interoperability for microwave Access WiMAX or 3G/4G, the communication line (32) connects the field router (11) and the NOC network server (23), the secure access module (31) is disposed on one end of the communication line (32) connected with the field router (11).
2. The power distribution network communication system according to claim 1, wherein: the flow model of the communication line (32) is as follows:
point-to-multipoint: the traffic from the NOC network server (23) to the distribution network automation system (12) supports unicast and multicast of IPv4/IPv6 and SCADA protocol through protocol conversion;
multipoint to multipoint: -traffic from the workflow management terminal (13) to the NOC network server (23);
point-to-point: traffic between external substations, besides IPv4/IPv6, supports two-layer IEC 61580GOOSE/SV, and communication between automatic closing switch controllers, uses WiMAX CPE to WiMAX base station of the substation.
3. The power distribution network communication system according to claim 1 or 2, wherein: the security access module (31) comprises a certificate identification layer, a network access control layer, a user management layer, a data security layer, a key management layer, a routing and flow filtering layer, a security isolation layer and a physical security layer, wherein the certificate identification layer, the network access control layer, the user management layer, the data security layer, the key management layer, the routing and flow filtering layer, the security isolation layer and the physical security layer are sequentially connected with one another, data enter from the certificate identification layer and are output from the physical security layer after passing through the network access control layer, the user management layer, the data security layer, the key management layer, the routing and flow filtering layer and the security isolation layer.
4. The power distribution network communication system according to claim 1 or 2, wherein: the workflow management terminal (31) uses a Push mode based on CoAP, the SNMP of the field router (11) uses a Push mode, and the Netflow/IPfix in the communication line (32) uses a Push mode;
the CoAP is an application layer protocol, the Push mode is a real-time playing mode, the SNMP is a network management protocol, the Pull mode is a playback mode, and the Netflow/IPfix is IP data flow information output.
5. The power distribution network communication system according to claim 3, wherein: the workflow management terminal (31) uses a Push mode based on CoAP, the SNMP of the field router (11) uses a Push mode, and the Netflow/IPfix in the communication line (32) uses a Push mode;
the CoAP is an application layer protocol, the Push mode is a real-time playing mode, the SNMP is a network management protocol, the Pull mode is a playback mode, and the Netflow/IPfix is IP data flow information output.
6. The power distribution network communication system according to claim 1 or 2, wherein: the low-power lossy network protocol RPL protocol flow is as follows:
using 902 to 928MHz frequency band, every 400kHz interval, and totally 64 non-overlapping frequency bands;
running the Ethernet protocol of Ipv4/IPv6, and three layers running IEC60870-5-104 provides communication between the distribution automation system (12) and the workflow management terminal (13);
the serial port supports RS-232/RS-485 to provide communication between a workflow management terminal (13) and a field router (11), and the equipment conforms to IEC 60870-5-101;
remote workflow management is carried out through a wire or a WiFI wireless network carried by the CGR 1000;
and (3) constructing a NAN neighborhood network by using a CG-Mesh technology to support end-to-end IPv6 communication.
7. The power distribution network communication system according to claim 3, wherein: the low-power lossy network protocol RPL protocol flow is as follows:
using 902 to 928MHz frequency band, every 400kHz interval, and totally 64 non-overlapping frequency bands;
running the Ethernet protocol of Ipv4/IPv6, and three layers running IEC60870-5-104 provides communication between the distribution automation system (12) and the workflow management terminal (13);
the serial port supports RS-232/RS-485 to provide communication between a workflow management terminal (13) and a field router (11), and the equipment conforms to IEC 60870-5-101;
remote workflow management is carried out through a wire or a WiFI wireless network carried by the CGR 1000;
and (3) constructing a NAN neighborhood network by using a CG-Mesh technology to support end-to-end IPv6 communication.
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| CN114554307B (en) * | 2021-10-26 | 2023-10-20 | 国网浙江省电力有限公司湖州供电公司 | Distribution transformer sub-joint temperature control device based on IP wireless communication |
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