A direct current bias linkage control system for nuclear power plants

Abstract

The utility model relates to a kind of nuclear power station direct current magnetic bias linkage control system, comprising: central control room workstation, main system unit, spare system unit, multiple field measurement and control unit and the multiple field measurement and control unit corresponding multiple local workstation of setting;Main system unit and spare system unit are connected with central control room workstation respectively, and multiple field measurement and control unit is connected with main system unit and spare system unit respectively;Spare system unit and main system unit are double-machine hot-standby redundancy structure, and spare system unit is in hot standby state, for real-time continuous synchronization main system unit and state data and system information, and switch to main communication channel when main system unit fails. Through the utility model, the problem of single channel failure leading to protection function failure can be solved, ensuring the safe and stable operation of high-voltage direct current transmission system core equipment, while also reducing maintenance difficulty and cost, with strong anti-interference ability and good real-time performance.

Description

Technical Field

[0001] This utility model relates to the field of power technology, and more specifically, to a DC bias magnetic linkage control system for nuclear power plants. Background Technology

[0002] In high-voltage direct current (HVDC) transmission systems, converter valves are core components, and their stable operation is crucial to the safety of the entire power grid. However, converter valves generate DC bias during operation. If the bias current is too large or lasts for too long, it will seriously threaten the safety of critical equipment such as converter transformers and converter valve bodies, and may even lead to system shutdown. Therefore, configuring a fast and reliable DC bias linkage protection device to monitor the bias status in real time and quickly link relevant equipment to achieve fault isolation or suppression is essential.

[0003] Currently, traditional DC bias linkage schemes mainly rely on hard-wiring within the station or conventional communication methods for signal transmission and linkage control. However, these schemes generally have significant technical defects, such as insufficient reliability, weak anti-interference capability, limited real-time performance, and poor maintainability. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a DC bias magnetic linkage control system for nuclear power plants, addressing the problems existing in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a DC bias magnetic linkage control system for a nuclear power plant, including: a central control room workstation, a main system unit, a backup system unit, multiple field measurement and control units, and multiple local workstations corresponding to the multiple field measurement and control units;

[0006] The main system unit and the backup system unit are respectively connected to the central control room workstation, and the multiple field measurement and control units are respectively connected to the main system unit and the backup system unit; the backup system unit and the main system unit have a dual-machine hot standby redundancy structure, and the backup system unit is in hot standby state, used to continuously synchronize the main system unit with status data and system information in real time, and to switch to the main communication channel when the main system unit fails.

[0007] In the nuclear power plant DC bias linkage control system described in this utility model, the main system unit and the backup system unit are physically isolated from each other and use independent communication channels.

[0008] In the nuclear power plant DC bias linkage control system of this utility model, the main system unit includes: a main data transmission module and a main control management module;

[0009] The main data transmission module is connected to the central control room workstation and the main control management module respectively, and is used to perform data transmission between the central control room workstation and the main control management module;

[0010] The main control management module is connected to the multiple field measurement and control units and is used to receive data from the multiple field measurement and control units in real time and send control commands to the multiple field measurement and control units.

[0011] In the nuclear power plant DC bias linkage control system of this utility model, the backup system unit includes: a backup data transmission module and a backup control management module;

[0012] The backup data transmission module is connected to the central control room workstation, the main control management module, and the backup control management module, respectively, and the backup control management module is connected to the main data transmission module;

[0013] The backup data transmission module is used to perform data transmission between the central control room workstation and the backup control management module, as well as to synchronize the status data and system information of the main control management module to the backup control management module.

[0014] In the nuclear power plant DC bias linkage control system described in this utility model, the backup data transmission module and the main data transmission module are designed with dual redundancy, and the backup data transmission module and the main data transmission module are physically isolated from each other and use independent communication channels.

[0015] In the nuclear power plant DC bias linkage control system described in this utility model, both the main data transmission module and the backup data transmission module are switches.

[0016] In the nuclear power plant DC bias linkage control system described in this utility model, both the main control management module and the backup control management module adopt a wideband device standard 4U chassis.

[0017] In the nuclear power plant DC bias linkage control system described in this utility model, both the main control management module and the backup control management module adopt a wideband device standard 4U chassis of model PAC-50K30-CCM.

[0018] In the nuclear power plant DC bias linkage control system described in this utility model, the field measurement and control unit adopts a wideband device standard 4U chassis.

[0019] In the nuclear power plant DC bias linkage control system described in this utility model, the model of the field measurement and control unit is: PAC-50K30-MCU.

[0020] The DC bias linkage control system for nuclear power plants implemented in this invention has the following beneficial effects: By adopting a redundant design with fiber optic communication, the reliability, real-time performance, and anti-interference capability of the DC bias linkage protection are greatly improved. It effectively solves the key problem of protection function failure caused by a single-channel fault, ensuring that the DC bias protection function can still operate reliably under extreme operating conditions or partial equipment failures, maximizing the safe and stable operation of the core equipment of the high-voltage direct current transmission system, while reducing maintenance difficulty and cost. Furthermore, this invention has a simple structure and strong practicality, making it very suitable for widespread application in high-voltage direct current transmission projects. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0022] Figure 1 This is a schematic block diagram of the DC bias linkage control system for nuclear power plants provided in this embodiment of the utility model;

[0023] Figure 2 This is a configuration diagram of the chassis board of the main control management module and the backup control management module provided in this embodiment of the utility model;

[0024] Figure 3 This is a configuration diagram of the chassis board of the field measurement and control unit provided in this embodiment of the utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a DC bias magnetic linkage control system for nuclear power plants, which adopts high-reliability optical fiber communication. It utilizes the advantages of optical fiber communication, such as large bandwidth, high speed, and strong anti-electromagnetic interference capability, to ensure high fidelity and low latency in the transmission of measurement signals and control commands. At the same time, it is designed with dual optical fiber channels, which automatically and seamlessly switch to the backup channel when the main channel fails, ensuring uninterrupted communication.

[0027] For details, please refer to Figure 1 , Figure 1 This invention illustrates a preferred embodiment of the DC bias magnetic linkage control system for nuclear power plants provided by this utility model.

[0028] like Figure 1As shown, the DC bias linkage control system of this nuclear power plant includes: a central control room workstation 10, a main system unit 20, a backup system unit 30, multiple field measurement and control units 40, and multiple field measurement and control units 40 (such as...). Figure 1 Multiple local workstations 50 (e.g., Field Measurement and Control Unit 1, Field Measurement and Control Unit 2, Field Measurement and Control Unit 3, ..., Field Measurement and Control Unit N) are configured corresponding to the field measurement and control unit 1, field measurement and control unit 2, field measurement and control unit 3, ..., field measurement and control unit N. Figure 1 The local workstations are designated as 1, 2, 3, ..., N, where local workstation 1 corresponds to field control unit 1, local workstation 2 corresponds to field control unit 2, local workstation 3 corresponds to field control unit 3, ..., local workstation N corresponds to field control unit N.

[0029] The main system unit 20 and the backup system unit 30 are respectively connected to the central control room workstation 10, and multiple field measurement and control units 40 are respectively connected to the main system unit 20 and the backup system unit 30. The backup system unit 30 and the main system unit 20 have a dual-machine hot standby redundant structure, and the backup system unit 30 is in a hot standby state, used to continuously synchronize the main system unit 20 with status data and system information in real time, and to switch to the main communication channel when the main system unit 20 fails. Preferably, in this embodiment of the present invention, the main system unit 20 and the backup system unit 30 are physically isolated from each other and use independent communication channels.

[0030] The central control room workstation 10 is mainly used to perform the following functions: real-time status display, displaying the measurement values ​​and alarm information of multiple field measurement and control units 40 in real time, and the activation / deactivation and operation mode of the remote manual control DC isolation device; historical event query function, viewing, printing, and exporting historical events according to date and event type, and viewing second-level historical curves according to date and telemetry name; setpoint management function, reading and modifying various setpoints of multiple field measurement and control units 40; waveform file analysis function, viewing the waveform file of any field measurement and control unit and performing waveform analysis; and access control function, which can configure different users to have different permissions to ensure the correctness of operation. Preferably, the central control room workstation 10 can be a TGW7000L model. It should be noted that in this embodiment of the present invention, the existing functions of the central control room workstation 10 are used, and the present invention does not improve its internal program.

[0031] Optionally, in some embodiments, the main system unit 20 includes: a main data transmission module 201 and a main control management module 202; the main data transmission module 201 is connected to the central control room workstation 10 and the main control management module 202 respectively, and is used to perform data transmission between the central control room workstation 10 and the main control management module 202; the main control management module 202 is connected to multiple field measurement and control units 40, and is used to receive data from multiple field measurement and control units 40 in real time and issue control commands to multiple field measurement and control units 40.

[0032] Optionally, in some embodiments, the backup system unit 30 includes: a backup data transmission module 301 and a backup control management module 302; the backup data transmission module 301 is connected to the central control room workstation 10, the main control management module 202, and the backup control management module 302, respectively, and the backup control management module 302 is connected to the main data transmission module 201; the backup data transmission module 301 is used to perform data transmission between the central control room workstation 10 and the backup control management module 302, and to synchronize the status data and system information of the main control management module 202 to the backup control management module 302. The backup data transmission module 301 and the main data transmission module 201 have a dual-redundancy design structure, and the backup data transmission module 301 and the main data transmission module 201 are physically isolated from each other, using independent communication channels.

[0033] This practical control system adopts a dual-machine hot standby redundancy architecture to achieve high reliability and seamless fault switching. The entire system can be divided into two main layers: a core management layer located in the central control room and an execution layer distributed across the equipment sites. The core management layer consists of a main system unit 20 and a standby system unit 30, while the execution layer consists of field measurement and control units and local workstations. The main control management module 202 and the standby control management module 302 are the core of the system. By default, the main control management module 202 acts as the master system, primarily responsible for receiving and processing data from all field measurement and control units in real time, executing preset linkage control logic, and issuing control commands to the field measurement and control units. The standby control management module 302 acts as the slave system, in a hot standby state, and continuously receives synchronized status data and system information from the main control management module 202 to maintain complete consistency between its own data and that of the main system unit 20. It is ready to take over control at any time in the event of a failure in the main system unit 20 (the standby control management module 302 can seamlessly take over control within ≤50ms).

[0034] In this embodiment of the invention, both the main control management module 202 and the backup control management module 302 adopt a standard 4U wideband device chassis. Specifically, both the main control management module 202 and the backup control management module 302 use a PAC-50K30-CCM standard 4U wideband device chassis. The chassis board configuration is as follows... Figure 2 As shown in Table 1, there are a total of 9 card slots on the back panel of the chassis. The card names from left to right in the rear view of the chassis are shown in Table 1 below.

[0035] Table 1. Configuration of Chassis Boards for Main Control Management Module 202 (Backup Control Management Module 302)

[0036]

[0037]

[0038] In this embodiment of the invention, the main data transmission module 201 and the backup data transmission module 301 constitute a dual-redundant ring network backbone for system communication. The main data transmission module 201 and the backup data transmission module 301 are physically isolated from each other and each uses an independent communication channel. In normal operating mode, the main control management module 202 communicates with all field measurement and control units through the main data transmission module 201, while the backup control management module 302 is mainly connected to the backup data transmission module 301 for status synchronization with the main control management module 202. When the main system unit 20 fails, the backup data transmission module 301 becomes the new main communication channel. Preferably, in this embodiment of the invention, both the main data transmission module 201 and the backup data transmission module 301 are switches. An H3C Mini-S1224R is preferred.

[0039] In this embodiment of the invention, the field measurement and control unit is directly deployed at the site of the monitored and controlled equipment. Each field measurement and control unit is responsible for collecting sensor signals from its area, performing core measurement functions, and ultimately executing control commands issued by the main control management module 202 (or the backup control management module 302 (when switching to the backup control management module 302 as the main system)). Preferably, the field measurement and control unit adopts a standard 4U wideband device chassis. The model of the field measurement and control unit is PAC-50K30-MCU. The chassis board configuration of the field measurement and control unit is as follows: Figure 3 As shown, there are a total of 9 backplane card slots. The card names from left to right in the rear view of the chassis are shown in Table 2 below.

[0040] Table 2. Chassis and Board Configuration Table of Field Measurement and Control Unit

[0041]

[0042]

[0043] The local workstation is located at the equipment site and corresponds one-to-one with the field measurement and control unit. It mainly serves as a local human-machine interface (HMI) to provide the following functions for field operators and maintenance personnel: real-time monitoring of the status and data of the corresponding field measurement and control unit; field debugging and parameter configuration; and providing a local manual operation interface in case of emergency or system failure, serving as a supplement or backup to remote automatic control.

[0044] In this embodiment of the invention, the main control management module 202 and the main data transmission module 201 communicate via a fiber optic network. Similarly, the backup control management module 302 and the backup data transmission module 301 also communicate via a fiber optic network. The main control management module 202 communicates with multiple field measurement and control units 40 via fiber optics, and similarly, the backup control management module 302 communicates with multiple field measurement and control units 40 via fiber optics.

[0045] Under normal circumstances, the field monitoring and control unit executes the control commands issued by the main control management module 202, realizing the simultaneous start-up and shutdown logic. When a communication failure occurs between the field monitoring and control unit and the main control management module 202, the field monitoring and control unit immediately switches to communication with the backup control management module 302. Simultaneously, the main control management module 202, the backup control management module 302, the main data transmission module 201, and the backup data transmission module 301 also employ... Figure 1 The two optical fibers shown enable real-time information exchange. The information obtained by the main control management module 202 and the backup control management module 302 from the field monitoring and control unit is completely identical, and both are simultaneously executing the same simultaneous activation and deactivation logic function. Specifically, whether the field monitoring and control unit executes the control command issued by the main control management module 202 or the control concept issued by the backup control management module 302 is determined by the field monitoring and control unit in real time by detecting its optical fiber links with the main control management module 202 and the backup control management module 302, and switching accordingly. Figure 1 In this configuration, the central control room workstation 10 communicates with the switch using two network segments, namely network segment A and network segment B. Network segment A communicates with the main control management module 202 via a fiber optic network through the main data transmission module 201; network segment B communicates with the backup control management module 302 via a fiber optic network through the backup data transmission module 301. This establishes dual-redundant communication between the central control room workstation 10 and the main control management module 202. The central control room workstation 10 displays the information sent from both network segments A and B. Simultaneously, the central control room workstation 10 sends relevant setpoints and parameters through both network segments A and B, and the setting of these setpoints and parameters is implemented by the internal switching logic of the main control management module 202.

[0046] It should be noted that the central control room workstation 10, switch, main control management module 202, backup control management module 302, field measurement and control unit, and local workstation in the nuclear power plant DC bias linkage control system of this utility model all adopt existing functions. The nuclear power plant DC bias linkage control system with this redundant structure is constructed through these modules and units to effectively solve the key problem of protection function failure caused by single channel failure. It ensures that the DC bias protection function can still operate reliably under extreme operating conditions or partial equipment failure, maximizes the safe and stable operation of the core equipment of the high voltage DC transmission system, and reduces maintenance difficulty and cost.

[0047] In addition, the nuclear power plant DC bias linkage control system of this utility model adopts a dual-machine hot standby redundancy architecture and a physically isolated dual-fiber ring network design, which can greatly improve the reliability, real-time performance and anti-interference capability of DC bias linkage protection.

[0048] The DC bias linkage control system for nuclear power plants of this utility model has a simple structure and strong practicality, making it very suitable for application in high-voltage DC transmission. It can be applied to power production enterprises such as nuclear power plants and substations, and to the simultaneous activation and deactivation control of multiple transformer isolation devices, thereby improving the operation and maintenance safety of DC isolation devices and significantly enhancing the economic benefits and safety of enterprises.

[0049] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They do not limit the scope of protection of this utility model. All equivalent changes and modifications made within the scope of the claims of this utility model should fall within the scope of the claims of this utility model.

Claims

1. A DC bias magnetic linkage control system for a nuclear power plant, characterized in that, include: The system includes a central control room workstation, a main system unit, a backup system unit, multiple field measurement and control units, and multiple local workstations corresponding to the multiple field measurement and control units. The main system unit and the backup system unit are respectively connected to the central control room workstation, and the multiple field measurement and control units are respectively connected to the main system unit and the backup system unit; the backup system unit and the main system unit have a dual-machine hot standby redundancy structure, and the backup system unit is in hot standby state, used to continuously synchronize the main system unit with status data and system information in real time, and to switch to the main communication channel when the main system unit fails.

2. The nuclear power plant DC bias linkage control system according to claim 1, characterized in that, The main system unit and the backup system unit are physically isolated from each other and use independent communication channels.

3. The nuclear power plant DC bias linkage control system according to claim 1, characterized in that, The main system unit includes: a main data transmission module and a main control and management module; The main data transmission module is connected to the central control room workstation and the main control management module respectively, and is used to perform data transmission between the central control room workstation and the main control management module; The main control management module is connected to the multiple field measurement and control units and is used to receive data from the multiple field measurement and control units in real time and send control commands to the multiple field measurement and control units.

4. The nuclear power plant DC bias linkage control system according to claim 3, characterized in that, The backup system unit includes: a backup data transmission module and a backup control and management module; The backup data transmission module is connected to the central control room workstation, the main control management module, and the backup control management module, respectively, and the backup control management module is connected to the main data transmission module; The backup data transmission module is used to perform data transmission between the central control room workstation and the backup control management module, as well as to synchronize the status data and system information of the main control management module to the backup control management module.

5. The nuclear power plant DC bias linkage control system according to claim 4, characterized in that, The backup data transmission module and the main data transmission module are designed with dual redundancy, and the backup data transmission module and the main data transmission module are physically isolated from each other and use independent communication channels.

6. The nuclear power plant DC bias linkage control system according to claim 4, characterized in that, Both the main data transmission module and the backup data transmission module are switches.

7. The nuclear power plant DC bias linkage control system according to claim 4, characterized in that, Both the main control management module and the backup control management module adopt a broadband device standard 4U chassis.

8. The nuclear power plant DC bias linkage control system according to claim 4, characterized in that, Both the main control management module and the backup control management module use a standard 4U wideband device chassis of model PAC-50K30-CCM.

9. The nuclear power plant DC bias linkage control system according to any one of claims 1-8, characterized in that, The field measurement and control unit adopts a wideband standard 4U chassis.

10. The nuclear power plant DC bias linkage control system according to any one of claims 1-8, characterized in that, The model of the field measurement and control unit is: PAC-50K30-MCU.

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