CN119835553A - A communication network for nuclear power plants - Google Patents
A communication network for nuclear power plants Download PDFInfo
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Abstract
The invention relates to a nuclear power plant communication network which comprises a first main optical cable, at least one first optical network unit, a second main optical cable, at least one second optical network unit, a first network, a second network and a network communication module, wherein the first main optical cable, the first optical network unit, the second main optical cable and the second optical network unit are arranged in each building of a nuclear power plant, the first optical network unit is connected with a far-end first server through a first network, the second optical network unit is connected with a far-end second server through a second network, the first network and the second network are mutually independent and are mutually active and standby, and the network communication module is used for executing communication between the first network and the second network. According to the invention, the communication network of the nuclear power plant is integrated into the first network and the second network which are mutually independent and are mutually active and standby, the communication system composition is optimized under the condition of ensuring the safety and the redundancy, the overall cost and the system performance are obviously reduced, and the requirements of various businesses of the nuclear power plant can be better met.
Description
Technical Field
The invention relates to the technical field of nuclear power plant communication networks, in particular to a nuclear power plant communication network.
Background
The nuclear power plant communication network is one of the standard configuration systems of the nuclear power plant, and the function of the nuclear power plant communication network is to provide communication means for staff during daily office work, production command and emergency response. The communication network of the nuclear power plant at present comprises fourteen subsystems in total, including an administrative telephone system, a security telephone system, an acoustic alarm system, a clock system, a power dispatching telephone system, a computer network, a sound telephone system, a comprehensive service transmission system, an internal intercom telephone system, a communication equipment monitoring system, a switching station communication system, a wire broadcasting system, a wireless communication system and a comprehensive wiring system.
The current nuclear power plant communication network consists of a plurality of subsystems with highly overlapped functions, and the communication system adopts high safety configuration of independent wiring, system redundancy and equipment redundancy to ensure the communication reliability because the functions of each system are single and the system reliability is low. For example, administrative telephone, internal intercom and wireless communication system constitute redundant backup among voice systems, wire broadcasting system and acoustic alarm system constitute redundant backup, and in addition, the key equipment such as host computer of each system adopts hot backup.
Because administrative telephone system, safe telephone system, sound alarm system, clock system, computer network, comprehensive service transmission system, internal intercom telephone system and wire broadcasting system of the nuclear power plant all adopt independent wiring network, single system network technology is behind, reliability is poor, single point fault problem exists, and the overall cost is higher, and certain difficulty is brought to engineering implementation and production operation maintenance of communication system, and the new requirements of new operation scene of the nuclear power plant on communication system can not be fully satisfied.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a nuclear power plant communication network.
The technical scheme adopted by the invention for solving the technical problems is that a nuclear power plant communication network is constructed, comprising a first main optical cable, at least one first optical network unit, a second main optical cable, at least one second optical network unit, a first network, a second network and a network communication module, wherein the first network comprises the at least one first optical network unit, and the second network comprises the at least one second optical network unit;
The first trunk optical cable, the at least one first optical network unit, the second trunk optical cable and the at least one second optical network unit are respectively arranged in each building of the nuclear power plant, the at least one first optical network unit is connected with the first trunk optical cable, the at least one second optical network unit is connected with the second trunk optical cable, the at least one first optical network unit is connected with a far-end first server through the first network, the at least one second optical network unit is connected with a far-end second server through the second network, and the first network and the second network are mutually independent and are mutually standby;
The network communication module is used for executing communication between the first network and the second network;
The first network is used for executing a first main and standby communication network function of the nuclear power plant;
the second network is used for executing a second primary and secondary communication network function of the nuclear power plant.
In the nuclear power plant communication network, the first network comprises at least one first optical line terminal and a first network communication unit, wherein the at least one first optical line terminal and the first network communication unit are correspondingly arranged with the at least one first optical network unit;
Each first optical network unit is connected with a first optical line terminal which is correspondingly arranged;
the at least one first optical line terminal is connected to the first network communication unit and is configured to perform communication between the at least one first optical network unit and the first network communication unit.
In the nuclear power plant communication network, the first network communication unit comprises a first SPN module or a first STN module, and the second network communication unit comprises a second SPN module or a second STN module.
In the nuclear power plant communication network, the first network further comprises a main broadcasting system host, a main telephone system host, a main office service server, a standby sound alarm system host, a standby clock system host and a standby wireless communication system host;
the main broadcasting system host, the main telephone system host, the main office service server, the standby sound alarm system host, the standby clock system host and the standby wireless communication system host are respectively connected with the first network communication unit.
In the nuclear power plant communication network, the second network comprises at least one second optical line terminal and a second network communication unit, wherein the second optical line terminal and the second network communication unit are arranged corresponding to the at least one second optical network unit;
Each second optical network unit is connected with a second optical line terminal which is correspondingly arranged;
The at least one second optical line terminal is connected to the second network communication unit and is configured to perform communication between the at least one second optical network unit and the second network communication unit.
In the nuclear power plant communication network, the second network comprises a main acoustic alarm system host, a main clock system host, a main wireless communication system host, a standby broadcast system host and a standby telephone system host;
The primary acoustic alarm system host, the primary clock system host, the primary wireless communication system host, the standby broadcast system host, and the standby telephone system host are respectively connected with the second network communication unit.
In the nuclear power plant communication network of the present invention, the network communication module is a hardware firewall.
In the nuclear power plant communication network of the present invention, the first optical network unit is physically connected to the first network and the second network, and the first optical network unit communicates with any one of the first network and the second network at the same time;
the second optical network unit is physically connected to the first network and the second network, and the second optical network unit communicates with any one of the first network and the second network at the same time.
In the nuclear power plant communication network, the first main optical cable and the second main optical cable are laid in different cable ducts, or the first main optical cable and the second main optical cable are laid in the same cable duct, and at least one main optical cable of the first main optical cable and the second main optical cable is a fire-resistant optical cable.
In the communication network of the nuclear power plant, different hard isolation slices transmitted on F5G are connected to different network ports of a slice packet network or an intelligent transmission network through different network ports of an optical line terminal, and are converted into different hard slices in the slice packet network or the intelligent transmission network for data transmission, and each communication subsystem host in the first network and the second network uses the corresponding hard slices of the communication subsystem in the slice packet network or the intelligent transmission network.
The nuclear power plant communication network has the advantages that the nuclear power plant communication network comprises a first main optical cable, at least one first optical network unit, a second main optical cable, at least one second optical network unit, a first network, a second network and a network communication module, wherein the first main optical cable, the first optical network unit, the second main optical cable and the second optical network unit are arranged in each building of a nuclear power plant, the first optical network unit is connected with a far-end first server through a first network, the second optical network unit is connected with a far-end second server through a second network, the first network and the second network are mutually independent and are mutually standby, and the network communication module is used for executing communication between the first network and the second network. According to the invention, the communication network of the nuclear power plant is integrated into the first network and the second network which are mutually independent and are mutually active and standby, the communication system composition is optimized under the condition of ensuring the safety and the redundancy, the overall cost and the system performance are obviously reduced, and the requirements of various businesses of the nuclear power plant can be better met.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
Fig. 1 is a network architecture diagram of a communication network of a nuclear power plant provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a network architecture diagram of a preferred embodiment of a communication network of a nuclear power plant according to the present invention.
Specifically, as shown in fig. 1, the nuclear power plant communication network comprises a first main optical cable, at least one first optical network unit, a second main optical cable, at least one second optical network unit, a first network, a second network and a network communication module. Wherein the first network comprises at least one first optical network unit and the second network comprises the at least one second optical network unit.
The system comprises a first main optical cable, at least one first optical network unit, a second main optical cable and at least one second optical network unit, wherein the first main optical cable, the at least one first optical network unit, the second main optical cable and the at least one second optical network unit are respectively arranged in each building of the nuclear power plant, the at least one first optical network unit is connected with the first main optical cable, the at least one second optical network unit is connected with a remote first server through a first network, the at least one second optical network unit is connected with a remote second server through a second network, the first network and the second network are mutually independent and are mutually active and standby, a network communication module is used for executing communication between the first network and the second network, the first network is used for executing a first active and standby communication network function of the nuclear power plant, and the second network is used for executing a second active and standby communication network function of the nuclear power plant.
The invention uses the transmission network of the communication network of the reconstructed nuclear power plant to integrate the comprehensive wiring system, the computer network system and the comprehensive service transmission system into the first network of the communication network of the nuclear power plant and the second network formed by the wireless communication system through framework optimization, and forms two sets of backbone transmission networks which are mutually independent in structure and are mutually main in function together, thus becoming the digital service infrastructure of the nuclear power plant. The invention fully utilizes the novel communication technology, redesigns the whole framework of the whole plant communication system, optimizes the system composition under the condition of not reducing the original safety and redundancy, reduces the overall cost and improves the system performance, thereby better meeting the new requirements of various businesses of the nuclear power plant.
Optionally, in the embodiment of the present invention, the first network includes at least one first optical line terminal and a first network communication unit, which are disposed corresponding to at least one first optical network unit. Each first optical network unit is connected with a first optical line terminal which is correspondingly arranged, and at least one first optical line terminal is connected with a first network communication unit and used for executing communication between the at least one first optical network unit and the first network communication unit. Specifically, in the embodiment of the present invention, the first optical line terminal (OLT 1) and the first optical network unit (ONU 1) form an F5G network, and the F5G network (5 th generation fixed network) supports a hard isolation slicing technology based on an ONU ethernet port, so that hard isolation of different slices in terms of VLAN, MAC, bandwidth and queue resources can be implemented.
Optionally, in the embodiment of the present invention, the first network communication unit includes a first SPN module or a first STN module.
Optionally, in the embodiment of the present invention, the first network further includes a plurality of communication subsystem hosts, specifically, a main broadcasting system host, a main telephone system host, a main office service server, a standby alarm system host, a standby clock system host, and a standby wireless communication system host, where the main broadcasting system host, the main telephone system host, the main office service server, the standby alarm system host, the standby clock system host, and the standby wireless communication system host are respectively connected to the first network communication unit. Specifically, the invention adopts the network technology of combining F5G and SPN (or STN), and merges the comprehensive wiring system, the computer network system and the comprehensive service transmission system into the first network of the communication network of the nuclear power plant.
Optionally, in the embodiment of the present invention, the second network includes at least one second optical line terminal and a second network communication unit, which are disposed corresponding to at least one second optical network unit. And at least one second optical line terminal is connected with the second network communication unit and is used for executing communication between the at least one second optical network unit and the second network communication unit. Specifically, in the embodiment of the present invention, the second optical line terminal (OLT 2) and the second optical network unit (ONU 2) form an F5G network, and the F5G network (5 th generation fixed network) supports a hard isolation slicing technology based on an ONU ethernet port, so that hard isolation of different slices in terms of VLAN, MAC, bandwidth and queue resources can be implemented.
Optionally, in the embodiment of the present invention, the second network communication unit includes a second SPN module or a second STN module.
Optionally, the first SPN module and the second SPN module are both slice packet networks, and the first STN module and the second STN module are both intelligent transport networks.
Optionally, in the embodiment of the present invention, the second network includes a plurality of communication subsystem hosts, specifically, a main alarm system host, a main clock system host, a main wireless communication system host, a standby broadcast system host, and a standby telephone system host. The main sound alarm system host, the main clock system host, the main wireless communication system host, the standby broadcast system host and the standby telephone system host are respectively connected with the second network communication unit.
Specifically, the invention optimizes the wireless communication system to be a second network of the nuclear power plant communication network by adopting a network technology combining F5G and SPN (or STN). The F5G network supports a hard isolation private network slicing technology based on an ONU Ethernet port, and can realize the hard isolation of different private network slices in terms of VLAN, MAC, bandwidth and queue resources.
Optionally, the network communication module is a hardware firewall. Specifically, in the embodiment of the invention, the first network and the second network are connected through the hardware firewall, so that interconnection and intercommunication, redundancy backup and the like between the two networks are realized.
Specifically, in the embodiment of the invention, the comprehensive wiring system, the computer network system and the comprehensive service transmission system are optimally integrated into the first network of the communication network of the nuclear power plant by adopting the network technology of combining F5G and SPN (or STN). Wherein, the F5G network (OLT (optical line terminal) +onu (optical network unit)) supports a hard isolation slice technology based on an ONU ethernet port (i.e. different ethernet ports of the ONU may be divided into different hard isolation slices), each different slice has a VLAN (virtual local area network) resource, a MAC (media access control) address table entry resource, an ARP (address resolution protocol) resource, a routing table entry resource, a bandwidth and a queue resource, which are independent of each other, so as to realize safe isolation of slices. Obviously, conventional network architectures cannot achieve these functions.
In the same way, the invention adopts the network technology of combining F5G and SPN (or STN), optimizes the wireless communication system into the network B of the communication network of the nuclear power plant through the architecture, wherein the F5G network supports the hard isolation slicing technology based on the ONU Ethernet port, and each different slice has independent VLAN resources, MAC address table entry resources, ARP resources, routing table entry resources, bandwidth and queue resources, thereby realizing the safe isolation of the slice.
It should be noted that, the network slicing refers to dividing the whole network according to different application scenarios and service requirements, so as to form a plurality of independent and customizable virtual network "slices". Each network slice can be customized according to specific requirements to achieve different quality of service and resource allocation.
The hard isolation slicing technology is to ensure that resources (such as bandwidth, time slot, ports and the like) among different slices are not interfered with each other through physical means or strict logic isolation mechanisms in network slicing, so that the exclusive sharing and strict isolation of the resources are realized. The hard isolation slicing technology aims to meet the extremely high requirements of specific services or user groups on network performance, safety and reliability, and ensure the stable operation of key services in the network.
Soft slicing refers to dynamically allocating network resources for different services or users through QoS (quality of service) technology on the same physical network to meet specific quality of service requirements. Compared with the hard isolation slicing technology, the soft slicing has no bandwidth guarantee capability, and is not suitable for business scenes requiring strict isolation and high reliability.
In the embodiment of the invention, different hard isolation slices transmitted on the F5G are connected to different network ports of a slice packet network or an intelligent transmission network through different network ports of an optical line terminal, and are converted into different hard slices in the slice packet network or the intelligent transmission network for data transmission, and each communication subsystem host in the first network and the second network uses the corresponding hard slices of the communication subsystem in the slice packet network or the intelligent transmission network. That is, different hard isolation slices transmitted on the F5G are connected to different network ports of the SPN (or STN) through different uplink network ports of the OLT, and after the SPN (or STN) is converted into different hard slices, data transmission is performed, and each communication subsystem host uses the corresponding hard slice of the communication subsystem in the SPN (or STN). For example, as shown in fig. 1, the main broadcasting system host makes a hard slice corresponding to the main broadcasting system host at the SPN (or STN). Wherein the hard slices of each communication subsystem of the first network and the second network are as shown in table 1:
TABLE 1
By using the communication network of the nuclear power plant, only one trunk optical cable (namely, a first trunk optical cable and a second trunk optical cable) of the first network and the second network and one or more corresponding ONU devices (namely, at least one or more corresponding ONUs 1 and one or more corresponding ONUs 2) are required to be arranged in each building of the nuclear power plant, wherein the ONU1 is arranged corresponding to the first trunk optical cable, and the ONU2 is arranged corresponding to the second trunk optical cable), so that the service requirements of each communication system in the building can be met. That is, in the communication network of the nuclear power plant, only the first main optical cable and one or more ONU1 devices, the second main optical cable and one or more ONU2 devices are required to be respectively arranged in each building, and meanwhile, a set of first network and a set of second network are arranged in the communication service system of the nuclear power plant, wherein the first network is communicated with the first main optical cable, and the second network is communicated with the second main optical cable, so that the requirement of the communication network of the nuclear power plant is met. As shown in fig. 1, the #1ONU1, #2ONU1, # n ONU1 communicates with the #1OLT1, #2 OLT1, respectively, through a first trunk optical cable, wherein the #1ONU1, #2ONU1, respectively, the # n ONU1 is a different optical network unit, and the #1OLT1, #2 OLT1, respectively, the # n OLT1 is a different optical line terminal. Likewise, #1ONU2, #2ONU2, # n ONU2 communicates with #1OLT2, #2 OLT2, respectively, through a second trunk optical cable, wherein #1ONU2, #2ONU2 are different optical network units, #1OLT2, #2 OLT2 are different optical line terminals. The first trunk optical cable, the second trunk optical cable, the first optical network unit and the second optical network unit are all installed in a building, and the first optical line terminal, the second optical line terminal, the first SPN module/the first STN module and the second SPN module/the second STN module are all installed in a communication machine room. Similarly, the main broadcasting system host, the main telephone system host, the main office service server, the standby alarm system host, the standby clock system host, the standby wireless communication system host, the main alarm system host, the main clock system host, the main wireless communication system host, the standby broadcasting system host and the standby telephone system host are also installed in the communication room.
Compared with the traditional method that each communication subsystem is required to be provided with a set of corresponding hardware equipment (such as a trunk optical cable and a terminal box of independent broadcasting, acoustic alarm, a clock terminal box, a telephone and the like) in each building, the invention not only can simplify the hardware architecture and the installation wiring (the transmission system is quite huge, the installation wiring is quite complex, the construction period is long, the redundancy is poor, the expandability is poor, the operation and maintenance workload is quite complex and difficult), but also can obviously shorten the construction period, the redundancy is good, the expandability is high, the operation and maintenance workload is obviously reduced, and meanwhile, the overall cost of the communication system can be effectively reduced while the system performance is improved. For example, when a new communication subsystem is needed to be added, the invention only needs to define the corresponding slice on the port of the ONU (ONU 1 or ONU 2) equipment in the building, and meanwhile, adds the corresponding system host at the system host end, and adds the corresponding communication port at the remote server end, thus completing the addition of the new system. No rewiring is required and no additional hardware devices are required. However, conventional communication networks, if a new communication subsystem is added, are very bulky projects, such as re-routing fiber optic cables, which is necessarily a bulky project, and the present invention is not affected at all.
In the embodiment of the invention, the broadcasting system and the hard isolation slice of the acoustic alarm system are arranged in different networks. For example, a broadcast system hard isolation slice (master) is provided on a first network, and an acoustic alarm system hard isolation slice (master) is provided on a second network. Since the broadcast system and the acoustic alarm system are two systems of the nuclear power plant which are standby to each other. Therefore, in the invention, in order to avoid that when the same network is in fault, if the network fails, two systems are not available at the same time, the broadcast system and the acoustic alarm system are arranged on two different networks, so that at least one system can be used when the network fails. Meanwhile, in order to ensure the redundancy and reliability of the system, the broadcasting system hard isolation slice (standby) is arranged on the second network, and the sound alarm system hard isolation slice (standby) is arranged on the first network.
In the embodiment of the invention, the telephone system hard isolation slice (main) is arranged in the first network, and the wireless communication system hard isolation slice (main) is arranged in the second network. Since the telephone system and the wireless communication system are two systems which are standby for each other in the nuclear power plant. Therefore, in the invention, in order to avoid that when the same network is in fault, if the network fails, two systems are not available at the same time, the broadcast system and the acoustic alarm system are arranged on two different networks, so that at least one system can be used when the network fails. Meanwhile, in order to ensure the redundancy and reliability of the system, the telephone system hard isolation slice (standby) is arranged in the second network, and the wireless communication hard isolation slice (standby) is arranged in the first network.
Further, in the embodiment of the present invention, the first optical network unit is physically connected to the first network and the second network, and the first optical network unit communicates with any one of the first network and the second network at the same time. The second optical network unit is physically connected to the first network and the second network, and the second optical network unit communicates with any one of the first network and the second network at the same time. Specifically, in the embodiment of the present invention, a single ONU device is connected to only a single network (the first network or the second network). In order to further improve the reliability of the communication system, a single ONU device may be connected to two networks, and when a certain network fails, the ONU device may be connected to another network, and only one network may be connected at a time, and the single ONU device may not be connected to both networks at the same time. That is, a single ONU device needs to be connected to two networks at the same time on a physical connection, and a single ONU device can only communicate with one of the networks at the same time.
For example, as shown in fig. 1, any ONU1 in the first network is physically connected to the first network and the second network respectively, but the ONU1 can only communicate with the first network at the same time, and when the first network fails, the ONU1 automatically switches to communicate with the second network, thereby ensuring the continuity and stability of data communication.
As shown in fig. 1, in order to further improve the reliability of the system, in the embodiment of the present invention, two primary and standby hosts of a single communication subsystem may be disposed on a first network, and the other host may be disposed on a second network.
Further, in the embodiment of the invention, in order to improve the reliability of the system, the first main optical cable and the second main optical cable are laid in different cable trenches, or the first main optical cable and the second main optical cable are laid in the same cable trench, and at least one main optical cable in the first main optical cable and the second main optical cable is a fire-resistant optical cable. If the first main optical cable and the second main optical cable are required to be laid in the same cable duct in actual projects, at least one optical cable of the first main optical cable and the second main optical cable is required to be a fire-resistant optical cable, so that two optical cables in the same cable duct are simultaneously burnt out when abnormal conditions such as fire disaster and the like occur, and network interruption is avoided.
In addition, in the embodiment of the present invention, in the first network, the first optical line terminal and the first SPN module/the first STN module also communicate with each other through an optical cable (for distinguishing from an optical cable in the second network, the optical cable is defined as an optical cable a), and in the second network, the second optical line terminal and the second SPN module/the second STN module also communicate with each other through an optical cable (for distinguishing from an optical cable in the first network, the optical cable is defined as an optical cable B). Wherein, the installation requirement of the optical cable A and the optical cable B is required to meet the condition that the optical cable A and the optical cable B are laid in different cable ditches, or the optical cable A and the optical cable B are laid in the same cable ditches, and at least one optical cable of the optical cable A and the optical cable B is a fire-resistant optical cable. If the optical cable A and the optical cable B are required to be laid in the same cable duct in actual projects, at least one optical cable of the optical cable A and the optical cable B is required to be a fire-resistant optical cable, so that when abnormal conditions such as fire disaster and the like occur, two optical cables in the same cable duct are simultaneously burnt out, and network interruption is avoided.
The invention adopts SPN (slicing packet network)/STN (intelligent transport network), F5G (5 th generation fixed network) and other novel network technologies to construct the comprehensive service transport network of the nuclear power plant, and the novel transport network has a hard isolation network slicing technology, thereby fully meeting the individual requirements of various intelligent services on time delay, bandwidth, safety isolation and the like.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same according to the content of the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made with the scope of the claims should be covered by the claims.
Claims (10)
1. The nuclear power plant communication network is characterized by comprising a first main optical cable, at least one first optical network unit, a second main optical cable, at least one second optical network unit, a first network, a second network and a network communication module, wherein the first network comprises the at least one first optical network unit, and the second network comprises the at least one second optical network unit;
The first trunk optical cable, the at least one first optical network unit, the second trunk optical cable and the at least one second optical network unit are respectively arranged in each building of the nuclear power plant, the at least one first optical network unit is connected with the first trunk optical cable, the at least one second optical network unit is connected with the second trunk optical cable, the at least one first optical network unit is connected with a far-end first server through the first network, the at least one second optical network unit is connected with a far-end second server through the second network, and the first network and the second network are mutually independent and are mutually standby;
The network communication module is used for executing communication between the first network and the second network;
The first network is used for executing a first main and standby communication network function of the nuclear power plant;
the second network is used for executing a second primary and secondary communication network function of the nuclear power plant.
2. The nuclear power plant communication network according to claim 1, wherein the first network includes at least one first optical line terminal and a first network communication unit provided corresponding to the at least one first optical network unit;
Each first optical network unit is connected with a first optical line terminal which is correspondingly arranged;
the at least one first optical line terminal is connected to the first network communication unit and is configured to perform communication between the at least one first optical network unit and the first network communication unit.
3. The nuclear power plant communication network of claim 2, wherein the first network communication unit comprises a first SPN module or a first STN module and the second network communication unit comprises a second SPN module or a second STN module.
4. The nuclear power plant communication network of claim 3, wherein the first network further comprises a primary broadcast system host, a primary telephone system host, a primary office service server, a standby audible alarm system host, a standby clock system host, and a standby wireless communication system host;
the main broadcasting system host, the main telephone system host, the main office service server, the standby sound alarm system host, the standby clock system host and the standby wireless communication system host are respectively connected with the first network communication unit.
5. The nuclear power plant communication network according to claim 3, wherein the second network includes at least one second optical line terminal and a second network communication unit provided corresponding to the at least one second optical network unit;
Each second optical network unit is connected with a second optical line terminal which is correspondingly arranged;
The at least one second optical line terminal is connected to the second network communication unit and is configured to perform communication between the at least one second optical network unit and the second network communication unit.
6. The nuclear power plant communication network of claim 5, wherein the second network comprises a primary acoustic alarm system host, a primary clock system host, a primary wireless communication system host, a backup broadcast system host, and a backup telephone system host;
The primary acoustic alarm system host, the primary clock system host, the primary wireless communication system host, the standby broadcast system host, and the standby telephone system host are respectively connected with the second network communication unit.
7. The nuclear power plant communication network of any one of claims 1-6, wherein the network communication module is a hardware firewall.
8. The nuclear power plant communication network of claim 1, wherein the first optical network unit is physically connected to the first network and the second network, and wherein the first optical network unit communicates with either of the first network and the second network at the same time;
the second optical network unit is physically connected to the first network and the second network, and the second optical network unit communicates with any one of the first network and the second network at the same time.
9. The nuclear power plant communication network of claim 1, wherein the first and second trunk cables are laid in different cable ducts, or wherein the first and second trunk cables are laid in the same cable duct and at least one of the first and second trunk cables is a fire resistant cable.
10. The communication network according to claim 1, wherein different hard-isolated slices transmitted on F5G in the first network and the second network are connected to different network ports of a slice packet network or an intelligent transmission network through different network ports of an optical line terminal, and are converted into different hard slices in the slice packet network or the intelligent transmission network for data transmission, and each communication subsystem host in the first network and the second network uses the corresponding hard slices of the communication subsystem in the slice packet network or the intelligent transmission network.
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