CN113162969A - Control network architecture for auxiliary system of nuclear power plant - Google Patents
Control network architecture for auxiliary system of nuclear power plant Download PDFInfo
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- CN113162969A CN113162969A CN202110096481.0A CN202110096481A CN113162969A CN 113162969 A CN113162969 A CN 113162969A CN 202110096481 A CN202110096481 A CN 202110096481A CN 113162969 A CN113162969 A CN 113162969A
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- H—ELECTRICITY
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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Abstract
The invention provides a nuclear power plant auxiliary system control network architecture, which comprises: an in-situ control system including a plurality of in-situ control stations; the system comprises an auxiliary control network centralized control system, a central control network management system and a central control network management system, wherein the auxiliary control network centralized control system comprises an engineer station, a plurality of operator stations, a network server, a data server and at least one optical fiber switch which are connected through a bus; the local control system is connected with the auxiliary control network centralized control system in a network mode through a single-ring network, a double-ring network or a star network. Compared with the prior art, the nuclear power plant auxiliary system control network architecture can effectively improve the operation working efficiency of a nuclear power plant.
Description
Technical Field
The invention relates to the field of nuclear power plant control, in particular to a control network architecture of an auxiliary system of a nuclear power plant.
Background
The public BOP subentry of the whole nuclear power plant serves a plurality of units, and is characterized in that the system is complicated and various, the scale is small, the geographical position is dispersed, and part of subentry (such as a circulating water treatment chamber, a hydrogen production station and the like) needs to provide information for a main control room of the unit. Due to these factors, conventional instrumentation schemes often employ independent operation management modes. Although these sub-items are not relevant to safety, their ability to operate properly will also be directly related to the reliable economic operation of the unit or even the entire plant.
With the rapid development of modern computer technology, control technology and communication technology, the monitoring mode of BOP subentries is optimized, the engineering application scheme which is more reasonable, effective, more economical, convenient, more stable and reliable and embodies the mature automation technology at present is sought, and the unified monitoring design of the subentries becomes a very practical problem.
The nuclear power plant auxiliary system centralized monitoring network is different from a unit Digital Control System (DCS), and is a network which is used for carrying out centralized monitoring, control and management on process systems or sub-items which are distributed dispersedly and play an auxiliary role in unit operation through a network technology so as to better adapt to the requirement of whole plant informatization management improvement. In the nuclear power projects of construction or in-service in China, the BOP auxiliary control network is not substantially applied, and the control mode of the BOP auxiliary system and the sub items of the nuclear power plant still adopts the operation and management mode of an on-site PLC control system and a host computer for monitoring.
At present, auxiliary systems of nuclear power plants are generally provided with an on-site duty room or a control room, and are provided with independent human-computer interface control devices, detection and control of auxiliary process systems are mostly realized in a mode of adding a local PLC control system and a host computer, the auxiliary process systems are mutually independent, and each system only has a small amount of important information which is sent to a DCS in a hard-wired mode for indication or alarm. According to the standard configuration of 2 machines, the number of the related auxiliary system PLC control devices is at least 10.
At present, each auxiliary system is mostly unattended, when each control system breaks down, only a comprehensive fault signal is sent to a DCS of a main control room for alarming, operators in the main control room can inform field operators to go to the field for verification and processing, but the response speed is slow due to the fact that the arrangement positions of equipment are dispersed.
In summary, the current solutions for the control network of the auxiliary system of the nuclear power plant mainly have the following defects:
1) centralized monitoring cannot be realized, and operation and maintenance are inconvenient.
The positions of all sub items are scattered, the polling work task of operators is heavy every day, the operators cannot respond at the first time after the operators break down on site, and the operation and the maintenance are inconvenient.
2) Existence of information island phenomenon
Each auxiliary system is provided with an independent control system, the auxiliary systems are integrated into a whole, a lot of valuable operation data of field equipment are not timely sent to a unit management system for secondary analysis and deep excavation, an information isolated island phenomenon exists, and the improvement of the informatization level of the whole unit is not facilitated.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a nuclear power plant auxiliary system control network architecture, which reduces the frequency of operation polling by performing centralized monitoring and control on incorporated auxiliary systems, thereby reducing the number of field operators and improving the operating efficiency and economy of the system. .
The embodiment of the invention provides a control network architecture of an auxiliary system of a nuclear power plant, which comprises the following components:
an in-situ control system; wherein the in-situ control system comprises a plurality of in-situ control stations;
an auxiliary control network centralized control system; the auxiliary control network centralized control system comprises an engineer station, a plurality of operator stations, a network server, a data server and at least one optical fiber switch which are connected through a bus;
wherein: and the local control system is in network connection with the auxiliary control network centralized control system in a single-ring network, double-ring network or star network mode.
Preferably, each local control station comprises an ethernet module; when the local control system is in network connection with the auxiliary control network centralized control system through the single ring network:
and the Ethernet modules of each local control station are mutually connected through a hand-in-hand structure and are connected into the optical fiber switch of the auxiliary control network centralized control system.
Preferably, each local control station comprises a first ethernet module and a second ethernet module; the auxiliary control network centralized control system comprises a first optical fiber switch and a second optical fiber switch; when the local control system is in network connection with the auxiliary control network centralized control system through the dual-ring network:
the first Ethernet modules of each local control station are connected with each other through a hand-in-hand structure and are connected into a first optical fiber switch of the auxiliary control network centralized control system;
and the second Ethernet modules of each local control station are connected with each other through a hand-in-hand structure and are connected into a second optical fiber switch of the auxiliary control network centralized control system.
Preferably, each local control station comprises a first ethernet module and a second ethernet module; the auxiliary control network centralized control system comprises a main optical fiber switch and a standby optical fiber switch; when the local control system realizes network connection with the auxiliary control network centralized control system through a star network:
the first Ethernet module of each local control station is accessed to a main optical fiber switch of the auxiliary control network centralized control system;
and the second Ethernet module of each local control station is accessed to the standby optical fiber switch of the auxiliary control network centralized control system.
Preferably, the local control system is provided with a manual operation switching button of the local control room/centralized control room; the manual operation switching button is used for realizing the operation authority of the local control room/the centralized control room.
Preferably, the monitoring picture of the auxiliary control network centralized control system is consistent with the monitoring pictures on each local control station; setting a switching picture of the operation authority on a monitoring picture of the auxiliary control network centralized control system; the switching picture covers all the systems, so that an operator can complete the operation authority switching of the local control room/the centralized control room by clicking a button of the switching picture.
Preferably, each operator station is also provided with a switching picture of the operation authority, and the priority of the switching picture is that the local control station is higher than the auxiliary control network centralized control system.
Preferably, the data server has the capability of storing user specified analog and digital quantities, including all necessary data for monitoring and diagnostics, accessing engineer stations; and by providing a data retrieval function, historical data can be reloaded to complete trend analysis and diagnosis.
Preferably, the alarm signal of each local control station is transmitted to the auxiliary control network centralized control system, and the alarm setting principle and the alarm grade of the auxiliary control network centralized control system are consistent with those of the operator stations.
Preferably, the auxiliary control network centralized control system runs specially developed auxiliary control configuration software, monitoring software and data software; the maximum load of the network does not exceed 20 percent, and the maximum load of the server does not exceed 30 percent.
In summary, in the embodiment, the local control station and the auxiliary control network centralized control system incorporated into the auxiliary control network can be selected to jointly construct the network architecture of the auxiliary control network, and the network structure constructed according to the method can effectively improve the operation working efficiency. The concrete points are as follows:
1. the operators can realize centralized monitoring and control of the brought in-situ control stations in the auxiliary control network centralized control room, the frequency of operation inspection is reduced, the number of field operators is further reduced, and the operation working efficiency and the economical efficiency of the system are improved.
2. The operating load of the main control room operator is reduced. The monitoring responsibility of the original main control room on the auxiliary system can be transferred to an operator of the auxiliary control network centralized control room, and meanwhile, the operation load of the operator of the main control room is reduced through reasonable distribution of management authority.
3. The relevance between the machine set DCS and the machine set DCS is reduced, and the influence on the supply progress and the debugging progress of the machine set DCS caused by system design change is reduced;
4. the auxiliary control network centralized control system is provided with a communication interface with each unit DCS, related data information can be sent to a main control room for displaying, storing and analyzing according to needs, a foundation is laid for further improving the informatization level of the whole unit, and the problem of information isolated island is thoroughly solved.
5. At present, the domestic three-generation nuclear power units are independently arranged, but the control and monitoring problems of the whole-plant public unit still exist. The nuclear power plant operators generally pay attention to the operating state of the process equipment of the unit units, but the management and the monitoring of the public units need to be coordinated by administrative measures. If the centralized control network of the auxiliary control network centralized control system is expanded, the monitoring of the public unit can be brought into the centralized control network of the auxiliary system, any problem does not exist in the technology, and the problem of matching between the control of the unit-made unit and the public unit can be well solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram illustrating a local control system and a secondary control network centralized control system connected via a single ring network according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a local control system and a secondary control network centralized control system connected via a dual ring network according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the local control system and the secondary control network centralized control system connected via a star network according to an embodiment of the present invention;
fig. 4 is a circuit diagram of control authority switching of the secondary control network centralized control system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a control network architecture of an auxiliary system of a nuclear power plant, which comprises the following components:
an in-situ control system 10; wherein the local control system comprises a plurality of local control stations 11.
In this embodiment, the local control station 11 may include: the system comprises a seawater desalination system control station, a desalted water production system control station, a nuclear island desalted water distribution system control station, a conventional island desalted water distribution system control station, a circulating water treatment system control station, a condensed water fine treatment system control station, a conventional island chemical dosing system control station, a conventional island chemical sampling system control station, a hydrogen production and distribution system control station, a compressed air production system control station, a sewage treatment system control station, a fire water pressure stabilizing system control station, various gas and potential radioactive waste liquid collection system control stations, a domestic water treatment system control station, a conventional waste liquid collection system control station and the like, wherein the number and the types of the control stations are determined according to actual needs, and the invention is not particularly limited.
An auxiliary control network centralized control system 20; the secondary-control-network centralized control system 20 includes an engineer station 22, a plurality of operator stations 23, a web server 24, a data server 25, at least one fiber-optic switch 26, and a picture server 27 connected by a bus 21.
In this embodiment, the secondary centralized control network system 20 uses a unified ethernet communication protocol, connects a plurality of local control stations 11 through optical fibers and switches, and configures necessary network servers, data servers, and redundant operator stations to form a centralized monitoring network, so as to implement centralized monitoring of each local control station 11. Meanwhile, the secondary centralized control network system 20 may also send control instructions to the local control stations 11 to control the operation of the local control stations 11.
In this embodiment, the network of the secondary control network centralized control system 20 runs specially developed secondary control configuration software, monitoring software, and data software. The maximum load of the network does not exceed 20 percent, and the maximum load of the server does not exceed 30 percent.
In this embodiment, the local control system 10 may be connected to the secondary centralized control system 20 through a single ring network, a dual ring network, or a star network.
Specifically, as shown in fig. 1, fig. 1 shows a schematic diagram of a local control system 10 implementing network connection through a single ring network by a secondary control network centralized control system 20.
In this case, each local control station 11 has an ethernet module 12, and the ethernet modules 12 of each local control station 11 are connected in series by optical fibers and then connected to the optical fiber switch 26 of the secondary centralized control system 20. At this time, each local control station 11 and the auxiliary control network centralized control system 20 form a single ring network structure of hand pulling.
During communication, data can be transmitted in both directions connected with the ethernet modules 12, and when a certain ethernet module 12 in the single-ring network fails, only the monitoring of the local control station 11 where the communication module is located is affected, and the other local control stations 11 are not affected. The most important advantages of the framework are simple structure and convenient construction and maintenance. Under the condition of keeping on-site monitoring, the single-ring network can still meet the centralized monitoring requirement of the auxiliary system.
In addition, the data bus carries data in two directions, the failure of any Ethernet module 12 and the data transmission of other local control stations 11 are not affected. If two non-adjacent ethernet modules 12 fail at the same time, the two modules and the intermediate system between the two modules are affected, and the other local control stations 11 are still not affected.
In this embodiment, the data communication system will provide sufficient intrinsic integrity and error checking to ensure that accidental errors in the program do not degrade the effectiveness and reliability of the program when the in-situ control system 10 is in data communication with the secondary centralized monitoring system 20. Failure of any system or component connected to the data communication system will not cause malfunction of the data communication system or any other system or component on the network. When an error occurs, the data communication system has sufficient intelligence to automatically request retransmission of the data or the hardware must briefly notify the software that it must decide to take the necessary action. If after a number of attempts there are still errors in the data transmission, an automatic, meaningful network-wide security error correction will be performed. The data refresh time is no greater than 1 second.
In the present embodiment, the data server 25 provides a storage function with the ability to store user-specified analog and digital quantities, including all necessary data for monitoring and diagnostics, access engineer stations. Through the data retrieval function, the historical data can be reloaded to complete the trend analysis and diagnosis function. The data call time is not more than 2 seconds.
As shown in fig. 2, in the present embodiment, for the case of a dual ring network, each local control station 11 includes a first ethernet module 13 and a second ethernet module 14; the secondary control network centralized control system 20 comprises a first fabric switch 261 and a second fabric switch 262; when the local control system 10 is networked with the secondary centralized control system 20 through the dual ring network:
the first ethernet modules 13 of each local control station 11 are connected to each other by a hand-pulling structure, and access the first fabric switch 261 of the secondary control network centralized control system 20;
the second ethernet modules 14 of each local control station 11 are connected to each other via a hand-held configuration and access the second fiber switch 262 of the secondary centralized control system 10.
In the network design, the whole communication system consists of two completely independent data buses, the two data buses always work simultaneously, and the monitoring and normal operation of an operator are not influenced by the fault of any data bus. To provide reliable and efficient communication between systems, the data communication system will interface the control system input/output processing system, the data acquisition system, and system peripherals. When one path of communication data bus system fails, the other path of communication data bus system should be automatically put into operation immediately, so that smooth and undisturbed communication is ensured.
As shown in fig. 3, in the present embodiment, for the case of a star network, each local control station 11 comprises a first ethernet module 15 and a second ethernet module 16; the secondary control network centralized control system 20 includes a main optical fiber switch 263 and a standby optical fiber switch 264; when the local control system realizes network connection with the auxiliary control network centralized control system through a star network:
the first ethernet module 15 of each local control station 11 accesses the primary fiber switch 263 of the secondary centralized control system 20;
the second ethernet module 16 of each local control site 11 accesses the standby fabric switch 264 of the secondary centralized control system 20.
In this case, since two core switches operate to collect data at the same time, one is responsible for network transmission and the other is standby. When the main core switch fails, the standby immediately takes over the network data transmission task. Each subsystem is independently connected to the core switch, and does not affect each other, and the whole network is not affected by a certain system fault.
As can be seen from the above description, the present embodiment can implement the start/stop/open/close operations of a single device in the auxiliary control network centralized control system 10 and the local control room 11, so that there is a possibility that the single device can be operated at two places simultaneously, and in order to avoid this, it is necessary to adopt technical means to control the operation authority.
Specifically, in the present embodiment, the local control system 10 is provided with a manual operation switching button of the local control room 11/centralized control room; the manual operation switching button is used for realizing the switching of the operation authority of the local control room/the centralized control room.
In the Local Control Room (LCR), a manual operation switching button of the LCR/centralized control room is provided, and when the LCR position is set, the corresponding screen operation of the screen server 27 is locked, and when the LCR position is set, the manual operation of the local control room is locked.
Specifically, in this embodiment, a switching picture of the operation authority is set on the monitoring picture of the secondary control network centralized control system 20; the switching picture covers all the systems, so that an operator can complete the operation authority switching of the local control room/the centralized control room by clicking a button of the switching picture.
In addition, each operator station is also provided with a switching picture of the operation authority, and the priority of the switching picture is that the local control station is higher than the auxiliary control network centralized control system.
Preferably, the alarm signal of each local control station is transmitted to the auxiliary control network centralized control system, and the alarm setting principle and the alarm grade of the auxiliary control network centralized control system are consistent with those of the operator stations.
In summary, in the embodiment, the local control station 11 incorporated into the auxiliary control network and the auxiliary control network centralized control system are selected to jointly construct the network architecture of the auxiliary control network, and the network structure constructed according to the method can effectively improve the operation working efficiency. The concrete points are as follows:
1. the operators can realize centralized monitoring and control of the brought in-situ control station 11 in the auxiliary control network centralized control room, the frequency of operation inspection is reduced, the number of field operators is further reduced, and the operation working efficiency and the economical efficiency of the system are improved.
2. The operating load of the main control room operator is reduced. The monitoring responsibility of the original main control room on the auxiliary system can be transferred to an operator of the auxiliary control network centralized control room, and meanwhile, the operation load of the operator of the main control room is reduced through reasonable distribution of management authority.
3. The relevance between the machine set DCS and the machine set DCS is reduced, and the influence on the supply progress and the debugging progress of the machine set DCS caused by system design change is reduced;
4. the auxiliary control network centralized control system 20 is provided with a communication interface with each unit DCS, and related data information can be sent to a main control room for displaying, storing and analyzing according to needs, so that a foundation is laid for further improving the informatization level of the whole unit, and the problem of information isolated island is thoroughly solved.
5. At present, the domestic three-generation nuclear power units are independently arranged, but the control and monitoring problems of the whole-plant public unit still exist. The nuclear power plant operators generally pay attention to the operating state of the process equipment of the unit units, but the management and the monitoring of the public units need to be coordinated by administrative measures. If the centralized control network of the auxiliary control network centralized control system is expanded, the monitoring of the public unit can be brought into the centralized control network of the auxiliary system, any problem does not exist in the technology, and the problem of matching between the control of the unit-made unit and the public unit can be well solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A nuclear power plant auxiliary system control network architecture, comprising:
an in-situ control system comprising a plurality of in-situ control stations;
the auxiliary control network centralized control system comprises an engineer station, a plurality of operator stations, a network server, a data server and at least one optical fiber switch which are connected through a bus;
the local control system is connected with the auxiliary control network centralized control system in a network mode through a single-ring network, a double-ring network or a star network.
2. The nuclear power plant auxiliary system control network architecture of claim 1, wherein each local control station includes an ethernet module; when the local control system is in network connection with the auxiliary control network centralized control system through the single ring network:
and the Ethernet modules of each local control station are mutually connected through a hand-in-hand structure and are connected into the optical fiber switch of the auxiliary control network centralized control system.
3. The nuclear power plant auxiliary system control network architecture of claim 1, wherein each local control station includes a first ethernet module and a second ethernet module; the auxiliary control network centralized control system comprises a first optical fiber switch and a second optical fiber switch; when the local control system is in network connection with the auxiliary control network centralized control system through the dual-ring network:
the first Ethernet modules of each local control station are connected with each other through a hand-in-hand structure and are connected into a first optical fiber switch of the auxiliary control network centralized control system;
and the second Ethernet modules of each local control station are connected with each other through a hand-in-hand structure and are connected into a second optical fiber switch of the auxiliary control network centralized control system.
4. The nuclear power plant auxiliary system control network architecture of claim 1, wherein each local control station includes a first ethernet module and a second ethernet module; the auxiliary control network centralized control system comprises a main optical fiber switch and a standby optical fiber switch; when the local control system realizes network connection with the auxiliary control network centralized control system through a star network:
the first Ethernet module of each local control station is accessed to a main optical fiber switch of the auxiliary control network centralized control system;
and the second Ethernet module of each local control station is accessed to the standby optical fiber switch of the auxiliary control network centralized control system.
5. The nuclear power plant auxiliary system control network architecture of claim 1,
the local control system is provided with a manual operation switching button of a local control room/a centralized control room; the manual operation switching button is used for realizing the switching of the operation authority of the local control room/the centralized control room.
6. The nuclear power plant auxiliary system control network architecture of claim 5, wherein a monitoring picture of the auxiliary control network centralized control system is consistent with a monitoring picture on each local control station; setting a switching picture of the operation authority on a monitoring picture of the auxiliary control network centralized control system; the switching picture covers all the systems, so that an operator can complete the operation authority switching of the local control room/the centralized control room by clicking a button of the switching picture.
7. The nuclear power plant auxiliary system control network architecture of claim 6,
each operator station is configured with a switching picture of the operation authority, and the priority of the switching picture is that the local control station is higher than the auxiliary control network centralized control system.
8. The nuclear power plant auxiliary system control network architecture of claim 1,
the data server has the capability of storing user-specified analog and digital quantities, including all necessary data for monitoring and diagnosing, accessing engineer stations; and by providing a data retrieval function, historical data can be reloaded to complete trend analysis and diagnosis.
9. The nuclear power plant auxiliary system control network architecture of claim 1, wherein the alarm signal of each local control station is transmitted to the secondary centralized control system, and the alarm setting principle and the alarm level of the secondary centralized control system are consistent with those of the operator station.
10. The nuclear power plant auxiliary system control network architecture of claim 1, wherein specially developed auxiliary control configuration software, monitoring software and data software are operated in the auxiliary control network centralized control system; the maximum load of the network does not exceed 20 percent, and the maximum load of the server does not exceed 30 percent.
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| CN205581629U (en) * | 2016-03-21 | 2016-09-14 | 云南大唐国际红河发电有限责任公司 | Accuse net integration control system assists in thermal power plant |
| CN206178462U (en) * | 2016-11-30 | 2017-05-17 | 辽宁大唐国际锦州热电有限责任公司 | Accuse net network control system is assisted in power plant |
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Application publication date: 20210723 |