Clock system of nuclear power plant
The NTP server-based clock system with satellite signal receiving modules and communication interfaces addresses the high deployment costs and time of traditional systems by utilizing existing networks, improving automation in nuclear power plants.
Patent Information
- Application Number
- CN202420943766.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The deployment of clock systems in nuclear power plants is costly and time-consuming due to the need for dedicated optical cables and interface boards, which affects the automation level and increases deployment time.
A clock system utilizing an NTP server with satellite signal receiving modules and multiple communication interfaces, enabling quick deployment of slave clocks via existing communication networks, eliminating the need for dedicated optical cables and interface boards.
Reduces deployment costs and time by leveraging existing communication networks, enhancing automation levels in nuclear power plants.
Smart Images
Figure CN222145409U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of clock synchronization, in particular to a clock system of a nuclear power plant. Background Art
[0002] In order to meet the needs of safe production and operation of nuclear power plants, nuclear power plants need to set up a clock system, which provides time reference signals for the synchronization equipment of the instrumentation and control and electrical systems of nuclear power plants, as well as clock synchronization signals for the slave clocks installed in various parts of the power plant, thereby ensuring the synchronization of various operations and data records of the nuclear power plant. Accurate time synchronization of the clock system is a necessary condition for improving the automation level of nuclear power plants. In nuclear power plants, various instrumentation and control and electrical equipment require accurate clock synchronization signals. If there is a problem with clock synchronization, it may cause the equipment protection device to malfunction and cause damage to the equipment. Nuclear power plants also need to collect data from various devices for analysis and processing. Clock synchronization is very important for ensuring consistency between different data and regularly synchronizing data to ensure data accuracy.
[0003] In the prior art, a master clock is generally installed in a 500kV switch station or a plant communication room in the central area of a plant. Figure 1 As shown in the figure, in addition to providing high-precision time synchronization for instrumentation and electrical system equipment, the master clock also provides time synchronization for each slave clock in the nuclear power plant. This solution requires that an interface board for connecting the slave clocks be configured in the master clock cabinet, and that the master clock cabinet be connected to the nuclear island, conventional island, auxiliary plant, office building and other buildings by laying a dedicated trunk optical cable for the clock system. A clock system terminal box is set up in each building, and then a dedicated clock cable is laid from the clock system terminal box to connect to each slave clock. The deployment cost of this solution is high and the deployment period is long. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a clock system for a nuclear power plant.
[0005] The technical solution adopted by the utility model to solve the technical problem is: a clock system of a nuclear power plant, comprising:
[0006] An NTP server, the NTP server comprising a first satellite signal receiving module for receiving satellite signals, and a first communication interface module for connecting to a communication network;
[0007] At least one slave clock device for receiving a timing signal sent by the NTP server based on the satellite signal, the slave clock device comprising a second communication interface module for connecting to the communication network, the slave clock device being communicatively connected to the first communication interface module of the NTP server via the second communication interface module;
[0008] The first satellite signal receiving module includes a first Beidou satellite signal output terminal, or includes a first Beidou satellite signal output terminal and a first GPS satellite signal output terminal, and the first GPS satellite signal output terminal is connected to a control switch.
[0009] Preferably, the clock system further comprises a satellite signal receiving antenna connected to the first satellite signal receiving module; the satellite signal receiving antenna is integrally arranged with the NTP server or is detachably connected thereto.
[0010] Preferably, the clock system includes multiple NTP servers, one of which serves as a main NTP server and the remaining NTP servers serve as backup NTP servers.
[0011] Preferably, the first communication interface module of the NTP server includes a first wired IP network interface for connecting to a wired IP network, and the second communication interface module of the slave clock device includes a second wired IP network interface for connecting to a wired IP network.
[0012] Preferably, the first communication interface module includes a first WiFi network interface for connecting to a WiFi network, and the second communication interface module includes a second WiFi network interface for connecting to a WiFi network.
[0013] Preferably, the first communication interface module includes a first 5G network interface for connecting to a 5G network, and the second communication interface module includes a second 5G network interface for connecting to a 5G network.
[0014] Preferably, the first communication interface module of the NTP server includes a wired broadcast network interface for connecting to a wired broadcast network.
[0015] Preferably, the slave clock device further includes a display screen.
[0016] Preferably, the clock system further comprises: a master clock device, the master clock device comprising a second satellite signal receiving module for receiving satellite signals, and a third communication interface module for connecting to nuclear power equipment.
[0017] Preferably, the second satellite signal receiving module includes a second Beidou satellite signal output terminal, or includes a second Beidou satellite signal output terminal and a second GPS satellite signal output terminal, and the second GPS satellite signal output terminal is connected to a control switch.
[0018] The clock system of a nuclear power plant implementing the utility model has the following beneficial effects: by setting up an NTP server to receive satellite signals to provide time for the slave clock equipment, the slave clock equipment can be quickly deployed in each sub-item, thereby effectively shortening the deployment period and improving the automation level of the nuclear power plant. Furthermore, there is no need to build an interface board, optical fiber distribution frame, clock optical cable, clock terminal box and other equipment between the master clock equipment and the slave clock equipment, which can reduce the deployment cost of the clock system. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:
[0020] Figure 1 It is a structural diagram of the clock system of the prior art of the utility model;
[0021] Figure 2 It is a structural diagram of the NTP server in the clock system of the utility model;
[0022] Figure 3 It is a structural diagram of an embodiment of the clock system of the utility model;
[0023] Figure 4 It is a structural schematic diagram of a master clock device in a clock system of the utility model;
[0024] Figure 5 It is a structural diagram of an embodiment of the clock system of the present utility model. DETAILED DESCRIPTION
[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.
[0026] It should be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the features. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.
[0028] In one embodiment of a clock system for a nuclear power plant of the utility model, the clock system includes: an NTP server and at least one slave clock device for receiving a timing signal sent by the NTP server based on a satellite signal.
[0029] like Figure 2 As shown, the NTP server includes a first satellite signal receiving module 11 for receiving satellite signals, and a first communication interface module 12 for connecting to a communication network. The first satellite signal receiving module 11 includes a first Beidou satellite signal output terminal, or includes a first Beidou satellite signal output terminal and a first GPS satellite signal output terminal, and the first GPS satellite signal output terminal is connected to a control switch.
[0030] Specifically, the first satellite signal receiving module 11 can simultaneously receive two satellite signals, namely, GPS satellite signals and Beidou satellite signals, to improve the accuracy of clock synchronization. The first satellite signal receiving module 11 includes both the first Beidou satellite signal receiving module and the first GPS satellite signal receiving module, which can be separately arranged or integrated. The first Beidou satellite signal receiving module is provided with a first Beidou satellite signal output terminal, and the first GPS satellite signal receiving module is provided with a first GPS satellite signal output terminal connected to a control switch. The control switch is arranged on the NTP server, and can be a touch switch or a mechanical switch, which is used to control the start and stop of the corresponding GPS satellite signal output, so as to realize the function of only receiving the signal of the Beidou satellite when necessary. It can be understood that in some other embodiments, the first satellite signal receiving module 11 may not include the first GPS satellite signal receiving module, so as to only receive the Beidou satellite signal.
[0031] In addition, the clock system also includes a satellite signal receiving antenna connected to the first satellite signal receiving module 11; the satellite signal receiving antenna is integrally arranged with the NTP server or detachably connected, and can receive GPS satellite signals and Beidou satellite signals.
[0032] In this embodiment, the slave clock device includes a second communication interface module for connecting to a communication network, and the slave clock device is communicatively connected to the first communication interface module 12 of the NTP server through the second communication interface module.
[0033] A nuclear power plant needs to use multiple slave clock devices, which are installed in different areas, such as nuclear island, conventional island, auxiliary plant and office buildings. These slave clock devices are connected to the existing communication network of the nuclear power plant through the second communication interface module, and the NTP server is connected to the communication network through the first communication interface module 12. The NTP server receives the clock synchronization signal of the satellite through the first satellite signal receiving module 11, generates a time reference signal based on the clock synchronization signal, and sends it to the second communication interface module through the first communication interface module 12 to complete the timing.
[0034] In this embodiment, the satellite signal is received by the NTP server to provide time for the slave clock device. The NTP server and the slave clock device can communicate through the existing communication network. There is no need to build a dedicated communication network between the NTP server and the slave clock device. The slave clock device can be quickly deployed in each sub-item, thereby effectively shortening the deployment period and improving the automation level of the nuclear power plant.
[0035] Furthermore, the clock system includes multiple NTP servers, one of which is used as a main NTP server, and the remaining NTP servers are used as backup NTP servers. Figure 3 As shown, two, three or more NTP servers can be set in the nuclear power plant, and these servers are respectively connected to the communication network of the nuclear power plant through the corresponding first communication interface module 12. One of the NTP servers is used as the main NTP server, and the remaining NTP servers are used as backup NTP servers. When the main NTP server fails, the backup NTP server can be switched to provide time for the slave clock device.
[0036] Furthermore, the communication network used in the nuclear power plant includes but is not limited to a wired IP network, a wireless WiFi network, a 5G network or a 4G network. The NTP server and the slave clock device need to be configured with corresponding communication network interfaces to access the communication network of the nuclear power plant. According to actual needs, each slave clock device may include all of the following network interfaces or only some of them.
[0037] The first communication interface module 12 of the NTP server includes a first wired IP network interface for connecting to a wired IP network, and the second communication interface module of the slave clock device includes a second wired IP network interface for connecting to a wired IP network. Specifically, the first wired IP network interface and the second wired IP network interface can use an optical fiber interface or an RJ-45 interface. The NTP server accesses the wired IP network of the nuclear power plant through the first wired IP network interface, and the slave clock device can access the wired IP network of the nuclear power plant by connecting to a nearby router or switch through the corresponding second wired IP network interface and a network cable, and then transmits the timing signal based on the wired IP network.
[0038] The first communication interface module 12 includes a first WiFi network interface for connecting to a WiFi network, and the second communication interface module includes a second WiFi network interface for connecting to a WiFi network. Specifically, the NTP server and the slave clock device access the WiFi network of the nuclear power plant through the first WiFi network interface and the corresponding second WiFi network interface, respectively, and transmit the timing signal based on the WiFi network.
[0039] The first communication interface module 12 includes a first 5G network interface for connecting to the 5G network, and the second communication interface module includes a second 5G network interface for connecting to the 5G network. Specifically, the NTP server and the slave clock device access the 5G network of the nuclear power plant through the first 5G network interface and the corresponding second 5G network interface, respectively, and transmit the timing signal based on the 5G network.
[0040] The first communication interface module 12 includes a first 4G network interface for connecting to a 4G network, and the second communication interface module includes a second 4G network interface for connecting to a 4G network. Specifically, the NTP server and the slave clock device access the 4G network of the nuclear power plant through the first 4G network interface and the corresponding second 4G network interface, respectively, and transmit the timing signal based on the 4G network.
[0041] In addition, a wired broadcasting system is also used in nuclear power plants to broadcast information. The first communication interface module 12 of the NTP server also includes a wired broadcasting network interface for connecting to a wired broadcasting network. The NTP server receives broadcast content from the wired broadcasting network, and then sends the broadcast content to the slave clock device through a wired IP network, a wireless WiFi network, a 5G network, or a 4G network. The slave clock device also includes a display screen, which can be an LED display screen for displaying time and broadcast content. When the slave clock device is set in a high noise area such as a conventional island, the time information and text information corresponding to the broadcast content of the nuclear power plant can be synchronously displayed through the display screen.
[0042] In another embodiment, the clock system further includes: a master clock device. Figure 4 As shown, the master clock device includes a second satellite signal receiving module 21 for receiving satellite signals, and a third communication interface module 22 for connecting to nuclear power equipment. The second satellite signal receiving module 21 includes a second Beidou satellite signal output terminal, or includes a second Beidou satellite signal output terminal and a second GPS satellite signal output terminal, and the second GPS satellite signal output terminal is connected to a control switch.
[0043] Specifically, the second satellite signal receiving module 21 can simultaneously receive two satellite signals, namely, GPS satellite signals and Beidou satellite signals, to improve the accuracy of clock synchronization. The second satellite signal receiving module 21 includes a second Beidou satellite signal receiving module and a second GPS satellite signal receiving module, and the first Beidou satellite signal receiving module and the second GPS satellite signal receiving module can be separately arranged or integrated. The second Beidou satellite signal receiving module is provided with a second Beidou satellite signal output terminal, and the second GPS satellite signal receiving module is provided with a second GPS satellite signal output terminal connected to a control switch. The control switch is arranged on the master clock device, and can be a touch switch or a mechanical switch, which is used to control the start and stop of the corresponding GPS satellite signal output, so as to realize the function of only receiving the signal of the Beidou satellite when necessary. It can be understood that in some other embodiments, the second satellite signal receiving module 21 may not include the second GPS satellite signal receiving module, so as to only receive the Beidou satellite signal.
[0044] Furthermore, the clock system also includes a second satellite signal receiving antenna connected to the second satellite signal receiving module 21; the satellite signal receiving antenna and the master clock device are integrally arranged or detachably connected.
[0045] like Figure 5 As shown, in the clock system of this embodiment, the slave clock is separated from the master clock system, and the slave clock timing function is realized by using NTP server + wireless / wireless mode. The master clock equipment only needs to provide timing for the instrumentation and control and electrical equipment of the nuclear power plant. The master clock does not need to be connected to the NTP server and each slave clock equipment of the slave clock timing part. Therefore, the slave clock interface board and the function boards and optical fiber distribution frames related to the slave clock timing are no longer configured in the master clock equipment cabinet. It is also no longer necessary to lay the clock system trunk optical cable from the master clock cabinet to each building, and the clock terminal box set in each building. It can save the cost of equipment material procurement and engineering implementation of the slave clock interface board, optical fiber distribution frame, clock optical cable, clock terminal box, etc., and reduce the deployment cost of the clock system.
[0046] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.
Claims
1. A clock system for a nuclear power plant, characterized in that: include: An NTP server, the NTP server comprising a first satellite signal receiving module for receiving satellite signals, and a first communication interface module for connecting to a communication network; At least one slave clock device for receiving a timing signal sent by the NTP server based on the satellite signal, the slave clock device comprising a second communication interface module for connecting to the communication network, the slave clock device being communicatively connected to the first communication interface module of the NTP server via the second communication interface module; The first satellite signal receiving module includes a first Beidou satellite signal output terminal, or includes a first Beidou satellite signal output terminal and a first GPS satellite signal output terminal, and the first GPS satellite signal output terminal is connected to a control switch.
2. The clock system of a nuclear power plant according to claim 1, characterized in that: The clock system also includes a satellite signal receiving antenna connected to the first satellite signal receiving module; the satellite signal receiving antenna and the NTP server are integrally arranged or detachably connected.
3. The clock system of a nuclear power plant according to claim 1, characterized in that: The clock system includes multiple NTP servers, one of which is used as a main NTP server, and the remaining NTP servers are used as backup NTP servers.
4. The clock system of a nuclear power plant according to claim 1, characterized in that: The first communication interface module of the NTP server includes a first wired IP network interface for connecting to a wired IP network, and the second communication interface module of the slave clock device includes a second wired IP network interface for connecting to a wired IP network.
5. The clock system of a nuclear power plant according to claim 1, characterized in that: The first communication interface module includes a first WiFi network interface for connecting to a WiFi network, and the second communication interface module includes a second WiFi network interface for connecting to a WiFi network.
6. The clock system of a nuclear power plant according to claim 1, characterized in that: The first communication interface module includes a first 5G network interface for connecting to a 5G network, and the second communication interface module includes a second 5G network interface for connecting to a 5G network.
7. The clock system of a nuclear power plant according to claim 1, characterized in that: The first communication interface module of the NTP server includes a wired broadcast network interface for connecting to a wired broadcast network.
8. The clock system of a nuclear power plant according to claim 1, characterized in that: The slave clock device also includes a display screen.
9. The clock system of a nuclear power plant according to claim 1, characterized in that: The clock system further includes: a master clock device, which includes a second satellite signal receiving module for receiving satellite signals and a third communication interface module for connecting to nuclear power equipment.
10. The clock system of a nuclear power plant according to claim 9, characterized in that: The second satellite signal receiving module includes a second Beidou satellite signal output terminal, or includes a second Beidou satellite signal output terminal and a second GPS satellite signal output terminal, and the second GPS satellite signal output terminal is connected to a control switch.