Nuclear power sbo diesel generator set control system and method

Abstract

The application discloses a nuclear power SBO diesel generator set control system and method, relates to the technical field of nuclear power emergency power supply, and comprises an emergency control module, a test control module, a mode switching module and a signal isolation module; the emergency control module is used for controlling the test control path to be cut off and the emergency path to be connected based on a mode switching instruction; the first running state is unidirectionally transmitted to the test control module based on the signal isolation module; the test control module is used for generating a running report based on the first running state and unidirectionally transmitting the running report to the emergency control module based on the signal isolation module. The application is used to solve the problems of slow response speed and generator set damage in the prior art when the emergency control of the nuclear power diesel generator set is performed, and realizes the safe operation of the generator set in the emergency mode and the stable power supply for the power supply equipment.

Description

Technical Field

[0001] This application relates to the field of nuclear power emergency power supply technology, and in particular to a control system and method for a nuclear power SBO diesel generator set. Background Technology

[0002] The SBO emergency diesel generator set is mainly used to provide backup power in the event of a plant-wide power outage. The unit is in a hot standby state all year round. When the nuclear island loses external power, it can start to supply power to the power supply equipment to ensure the normal operation of the nuclear power plant's critical equipment.

[0003] Existing nuclear power plant emergency diesel generator control systems employ a single control mode, relying solely on generator sets to activate and supply power to equipment during power outages. However, this approach results in a slow emergency response, risks impacting the operation of critical equipment, and carries the risk of unforeseen generator set malfunctions that could damage the generator. Summary of the Invention

[0004] In response to the aforementioned problems and technical requirements, the applicant proposes a nuclear power SBO diesel generator set control system and method to solve the problems of slow response speed and damage to generator sets in the emergency control of nuclear power diesel generator sets in the prior art, so as to realize the safe operation of generator sets in emergency mode and provide stable power supply to power equipment.

[0005] This application provides a nuclear power SBO diesel generator set control system, the system including: an emergency control module, a test control module, a mode switching module and a signal isolation module;

[0006] The emergency control module and the test control module are respectively connected to the diesel generator set; The emergency control module and the test control module are isolated by the signal isolation module; The mode switching module is used to generate a mode switching instruction to switch the test mode of the test control module to the emergency mode of the emergency control module when an emergency signal is received, and to send the mode switching instruction to the emergency control module. The emergency control module is used to control the disconnection of the test control path between the test control module and the diesel generator set, and to connect the emergency control module and the diesel generator set, based on the mode switching command; to obtain the first operating status of the diesel generator set; and to transmit the first operating status unidirectionally to the test control module based on the signal isolation module. The test control module is used to generate an operation report based on the first operating state, and to transmit the operation report unidirectionally to the emergency control module based on the signal isolation module, wherein the operation report includes whether to indicate that the emergency path is disconnected.

[0007] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the test control module is further configured to acquire the second operating state of the diesel generator set when the current operating mode is determined to be the test mode; test the generator set based on the preset test instance and the second operating state, obtain the test results, and send the test results to the emergency control module, wherein the test results include whether the diesel generator set has an emergency fault; The emergency control module is used to, upon receiving the mode switching command and determining, based on the test results, that the generator set does not have an emergency fault, control the disconnection of the test control path between the test control module and the diesel generator set, and connect the emergency control module to the emergency path between the diesel generator set.

[0008] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the signal isolation module includes: an optical coupler isolation unit, a communication isolation unit, and physical location isolation requirements for the emergency control module and the test control module; Wherein, the isolation voltage of the optocoupler unit is greater than a preset voltage; The communication isolation unit includes an optical fiber and a PLC remote I / O station, wherein the PLC remote I / O station is located in the emergency control module.

[0009] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the first data transmission path for the emergency control module to transmit data to the test control module includes: the emergency control module is connected to the input terminal of the optocoupler isolation unit, and the output terminal of the optocoupler isolation unit is connected to the DI module of the PLC remote I / O station; wherein, the PLC remote I / O station communicates with the test control module through optical fiber; The second data transmission path for the test control module to transmit data to the emergency control module includes: the DO module of the PLC remote I / O station is connected to the input terminal of the optocoupler isolation unit, and the output terminal of the optocoupler isolation unit is connected to the emergency control module.

[0010] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the emergency control module includes: a safety-grade intermediate relay; The test control module includes: a programmable logic controller; When the emergency control module communicates data with the test control module, the first operating state is transmitted sequentially to the programmable logic controller through the safety-level intermediate relay contact, the optocoupler isolation unit corresponding to the uplink direction, the DI module, and the optical fiber. When the test control module communicates data with the emergency control module, the start command for instructing the emergency control module to start the diesel generator set is sequentially transmitted through the programmable logic controller, optical fiber, DO module, and the corresponding optocoupler isolation unit in the downlink direction to the safety-level intermediate relay.

[0011] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the mode switching module includes: a mode switching switch; The mode switching switch is used to generate a mode switching command in response to user operation, switching the test mode of the test control module to the emergency mode of the emergency control module.

[0012] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the emergency control module is connected to an uninterruptible power supply. The test control module is connected to an AC / DC power supply.

[0013] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the emergency control module includes: a safety-grade intermediate relay and a hard-wired logic circuit; The safety-grade intermediate relay is connected to the corresponding actuator of the diesel generator set through a hard-wired logic circuit. The actuator includes a start solenoid valve, a fuel solenoid valve, and a closing coil of the generator output circuit breaker. The test control module includes a programmable logic controller.

[0014] According to the nuclear power SBO diesel generator set control system provided in the embodiments of this application, the emergency signal includes any one or more of the following: a power outage signal when a power outage occurs and an indication signal from the user to start the diesel generator set using the emergency control module.

[0015] This application also provides a control method for a nuclear power SBO diesel generator set, the method comprising: Upon receiving an emergency signal, a mode switching command is generated to switch the test mode of the test control module to the emergency mode of the emergency control module. Based on the mode switching command, the test control path between the test control module and the diesel generator set is cut off, and the emergency control path between the emergency control module and the diesel generator set is connected; the first operating state of the diesel generator set is obtained. An operation report is generated based on the first operating status, wherein the operation report includes whether the emergency access route is disconnected.

[0016] The nuclear power SBO diesel generator set control system and method provided in this application include: an emergency control module, a test control module, a mode switching module, and a signal isolation module; the emergency control module and the test control module are isolated by the signal isolation module. This application utilizes the signal isolation module to isolate the emergency control module and the test control module, avoiding mutual interference between the two modules and ensuring the safety and reliability of the emergency start diesel generator set; the mode switching module generates a mode switching command upon receiving an emergency signal; based on the mode switching command, the emergency control module controls the disconnection of the test control path between the test control module and the diesel generator set, and connects the emergency control module and the diesel generator set... The system includes an emergency access path; it acquires the first operating status of the diesel generator set; it transmits the first operating status unidirectionally to the test control module based on the signal isolation module; and it generates an operation report based on the first operating status using the test control module. The operation report includes whether the emergency access path is disconnected. This application utilizes the emergency control module to quickly and reliably disconnect the test control path between the test control module and the diesel generator set, as well as connect the emergency control module to the emergency access path of the diesel generator set. This improves the response speed and handling capability of the diesel generator set to emergencies. Furthermore, the test control module monitors the operating status of the diesel generator set to ensure its safe and stable operation, thus achieving the goal of continuously and stably supplying power to the power supply equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the nuclear power SBO diesel generator set control system provided in the embodiments of this application; Figure 2 This is a flow field diagram of the nuclear power SBO diesel generator set control method provided in the embodiments of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] This application provides a nuclear power SBO diesel generator set control system, such as... Figure 1 As shown, the system includes: an emergency control module 101, a test control module 102, a mode switching module 103, and a signal isolation module 104.

[0021] Emergency control module 101 and test control module 102 are respectively connected to the diesel generator set.

[0022] The emergency control module 101 and the test control module 102 are isolated by a signal isolation module 104.

[0023] The mode switching module 103 is used to generate a mode switching instruction to switch the test mode of the test control module 102 to the emergency mode of the emergency control module 101 when an emergency signal is received, and to send the mode switching instruction to the emergency control module 101.

[0024] The emergency control module 101 is used to control the disconnection of the test control path between the test control module 102 and the diesel generator set based on the mode switching command, and to connect the emergency control module 101 and the emergency path between the diesel generator set; to obtain the first operating status of the diesel generator set; and to transmit the first operating status unidirectionally to the test control module 102 based on the signal isolation module.

[0025] The test control module 102 is used to generate an operation report based on the first operating state and transmit the operation report unidirectionally to the emergency control module 101 based on the signal isolation module.

[0026] The operational report includes whether the emergency access route has been disconnected.

[0027] The nuclear power SBO diesel generator set control system provided in this application includes: an emergency control module, a test control module, a mode switching module, and a signal isolation module. The emergency control module and the test control module are isolated by the signal isolation module. This application uses the signal isolation module to isolate the emergency control module and the test control module, avoiding mutual interference between the two modules and ensuring the safety and reliability of emergency start diesel generator set. The mode switching module generates a mode switching command when it receives an emergency signal. Based on the mode switching command, the emergency control module controls the disconnection of the test control path between the test control module and the diesel generator set, and connects the emergency control module and the emergency path between the emergency control module and the diesel generator set. The first operating state of the diesel generator set is obtained; the first operating state is unidirectionally transmitted to the test control module based on the signal isolation module; the test control module generates an operation report based on the first operating state, wherein the operation report includes whether the emergency path is disconnected. This application utilizes the emergency control module to quickly and reliably complete the disconnection of the test control path between the test control module and the diesel generator set, as well as the connection of the emergency control module and the diesel generator set's emergency path, thereby improving the diesel generator set's response speed and handling capability to emergencies. Furthermore, the test control module monitors the operating state of the diesel generator set to ensure its safe and stable operation, achieving the goal of continuously and stably supplying power to the power supply equipment.

[0028] Specifically, in the event of a failure of the test control module 102, the emergency control module 101 can independently complete the emergency start-up, load-bearing, and shutdown control of the generator set, ensuring rapid response and providing emergency power. It also monitors the operation of the diesel generator set in real time during operation to ensure the safe and stable operation of the system.

[0029] In one specific embodiment, the test control module 102 is further configured to, when the current operating mode is determined to be the test mode, acquire the second operating state of the diesel generator set; test the generator set based on the preset test instance and the second operating state, obtain the test results, and send the test results to the emergency control module 101.

[0030] The test results include whether the diesel generator set has any emergency malfunctions.

[0031] The emergency control module 101 is used to control the disconnection of the test control path between the test control module 102 and the diesel generator set, and to connect the emergency control module 101 and the emergency path between the diesel generator set when it receives a mode switching command and determines that there is no emergency fault in the generator set based on the test results.

[0032] This application determines whether the diesel generator set has any emergency faults based on test results when starting the diesel generator set, thus ensuring the safe and stable start-up of the diesel generator set.

[0033] Specifically, in emergency mode, the status signal of emergency control module 101 is continuously transmitted unidirectionally to test control module 102 for monitoring and recording, while the control signal of test control module 102 is only transmitted to emergency control module 101 in non-emergency mode.

[0034] In one specific embodiment, the signal isolation module 104 includes: an optical coupler isolation unit, a communication isolation unit, and physical location isolation requirements for the emergency control module and the test control module.

[0035] The isolation voltage of the optocoupler unit is greater than a preset voltage, for example, a preset voltage of 5000Vrms, and the signal transmission rate is greater than 1Mbps.

[0036] The communication isolation unit includes: fiber optic cable and PLC remote I / O station, with the PLC remote I / O station located in the emergency control module.

[0037] The physical location isolation meets the safety-grade equipment isolation requirements of GB / T 13286 standard. Remote racks and safety equipment are physically separated according to section 5.6 of GB / T13286. The laying distance between safety-grade cables (emergency side) and non-safety-grade cables (non-emergency side) is not less than 50cm.

[0038] This application employs opto-isolation and physical location isolation to achieve signal transmission between the emergency control module 101 and the test control module 102. The signal communication between the emergency control module 101 and the test control module 102 is achieved through optocoupler isolation units and physical location isolation (physical wiring separation) to ensure that the operation of the two modes does not interfere with each other, thereby improving the reliability of the system.

[0039] This separation design not only ensures flexibility during normal operation but also guarantees rapid response and reliability of the system in emergency situations. It effectively ensures that critical facilities such as nuclear power plants can quickly and reliably switch to emergency mode during power outages, unaffected by testing modes or routine maintenance. Especially in high-risk environments such as nuclear power plants, this method can significantly improve the safety and reliability of starting the SBO emergency diesel generator set.

[0040] In one specific embodiment, the first operating state corresponding to the emergency control module 101 is transmitted unidirectionally to the test control module 102 after photoelectric isolation, for the purpose of monitoring the status of the diesel generator set, recording events, and analyzing performance.

[0041] The test control signal corresponding to the test control module 102 is transmitted unidirectionally to the emergency control module 101 after opto-isolation. However, the execution of the test control signal is controlled by the mode switching module and is only effective when the system is in test mode and there is no emergency signal.

[0042] Among them, the test control signal is the signal that needs to be activated during the test.

[0043] In one specific embodiment, the first data transmission path for the emergency control module 101 to transmit data to the test control module 102 includes: the emergency control module 101 is connected to the input terminal of the optocoupler isolation unit, and the output terminal of the optocoupler isolation unit is connected to the DI module of the PLC remote I / O station.

[0044] The PLC remote I / O station communicates with the PLC of the test control module 102 via optical fiber.

[0045] The DI module is a digital input module.

[0046] Specifically, in the first operating state, after the optocoupler isolation unit is driven by the relay contacts of the emergency control module 101, it is connected to the DI module of the PLC remote I / O station.

[0047] The second data transmission path for the test control module 102 to transmit data to the emergency control module 101 includes: the DO module of the PLC remote I / O station is connected to the input terminal of the optocoupler isolation unit, and the output terminal of the optocoupler isolation unit is connected to the emergency control module 101.

[0048] The DO module is a digital output module.

[0049] Specifically, the test results or test control signals are output through the DO module of the PLC remote I / O station, and then drive the optocoupler isolation unit before being connected to the relay of the emergency control module 101.

[0050] Specifically, in test mode, the test program is started via HMI, the PLC controls the unit to start under no-load, and then loads in stages according to the preset program (such as 50%, 75%, 100% rated load), monitors the stability of various parameters, and automatically generates a diagnostic report containing conclusions after the test is completed.

[0051] In test mode, the PLC analyzes the unit's performance data in real time, provides fault pre-diagnosis suggestions (such as fuel pump wear warning and bearing temperature abnormality prompt), and optimizes load allocation strategies based on historical data (such as prioritizing power supply to the containment cooling system).

[0052] In one specific embodiment, the emergency control module 101 includes a safety-grade intermediate relay.

[0053] Specifically, the emergency control module 101 includes a relay control cabinet, which contains safety-grade intermediate relays.

[0054] The safety-grade intermediate relay meets nuclear power qualification standards and has a contact capacity of not less than 10A.

[0055] The relay control cabinet also includes hard-wired logic circuits.

[0056] The safety-grade intermediate relay is connected to the corresponding actuator of the diesel generator set through a hard-wired logic circuit.

[0057] The actuators include: a start solenoid valve, a fuel solenoid valve, and a closing coil for the generator outlet circuit breaker.

[0058] Specifically, the relay control cabinet also includes time relays.

[0059] In one specific embodiment, the emergency control module 101 is connected to a UPS uninterruptible power supply and is powered by the UPS uninterruptible power supply.

[0060] For example, the input voltage of a UPS (Uninterruptible Power Supply) is 220V AC, and the backup time is greater than or equal to 2 hours.

[0061] In one specific embodiment, the test control module 102 includes a PLC control cabinet.

[0062] Specifically, the PLC control cabinet includes: a programmable logic controller (PLC), an analog input module (used to acquire signals such as temperature and pressure), a digital I / O module, a communication module, and an HMI touch screen.

[0063] The HMI touchscreen is a human-machine interface unit used for parameter setting, status display, periodic grid connection and load testing, test reports, test results, and fault diagnosis suggestions.

[0064] Specifically, the PLC control cabinet connects to various sensors corresponding to the diesel generator set via shielded cables, such as lubricating oil temperature sensors, cooling water pressure transmitters, and voltage / current transmitters. Automated loading tests are achieved through control signal output via the DO output module, including synchronous grid connection signals.

[0065] The various signal parameters obtained include: unit thermal parameters (such as lubricating oil temperature and cooling water pressure), electrical parameters (such as voltage, current, frequency, and speed), etc.

[0066] Specifically, the PLC is responsible for controlling the start-up, shutdown, and loading of the unit in test mode, monitoring and recording all operating parameters in real time, executing protection logic, generating test reports, and communicating with the DCS system through protocols such as Modbus-TCP.

[0067] In one specific embodiment, the test control module 102 is connected to an AC / DC power supply and is powered by the AC / DC power supply.

[0068] In one specific embodiment, when the emergency control module 101 communicates data with the test control module 102, the first operating state is transmitted sequentially to the programmable logic controller through the safety-grade intermediate relay contact, the optocoupler isolation unit corresponding to the uplink direction, the DI module, and the optical fiber.

[0069] When the test control module 102 communicates with the emergency control module 101, the start command for instructing the emergency control module 101 to start the diesel generator set passes sequentially through the programmable logic controller, optical fiber, DO module, and the corresponding optocoupler isolation unit in the downlink direction to the safety-level intermediate relay.

[0070] In one specific embodiment, the mode switching module 103 includes a mode switching switch.

[0071] The mode switching switch is used to generate a mode switching command in response to user operation, switching the test mode of the test control module to the emergency mode of the emergency control module.

[0072] In one specific embodiment, the emergency signal includes one or more of the following: a power outage signal when a power outage occurs (nuclear island power failure or plant-wide power failure) and an instruction signal from the user to start the diesel generator set using the emergency control module.

[0073] Specifically, the indication signals include mode switching commands.

[0074] Specifically, the control system of this application adopts a dual-redundant control architecture combining relay hard-wired logic and a programmable logic controller (PLC). In emergency mode, safety-grade relay logic is used to implement emergency start-up, load-bearing, and shutdown control of the unit, ensuring power supply reliability with a rapid response within 15 seconds. In test mode, a PLC is used to implement test functions such as flexible configuration of unit thermal parameters, real-time monitoring, and alarm protection.

[0075] Furthermore, the emergency mode has priority under all circumstances, and the system can automatically switch to emergency mode to ensure the power supply of the nuclear power plant in extreme situations. Signal communication between the two modes is achieved through opto-isolation and physical isolation to ensure no signal interference and further improve system reliability.

[0076] In emergency situations, the emergency mode has priority for activation, automatically switches, and is unaffected by the test mode. This mechanism significantly improves the unit's response speed and handling capability to sudden situations, avoiding unnecessary delays. The test mode employs PLC control, enabling various parameter adjustments and performance tests to optimize unit operation. This makes daily maintenance and optimization more convenient, improving the overall performance of the unit.

[0077] The control system of this application ensures that the nuclear power SBO emergency diesel generator set can reliably and quickly respond to power supply under any circumstances, while also having convenient functions for periodic testing and unit maintenance.

[0078] This application also provides a control method for a nuclear power SBO diesel generator set. The specific implementation of this method can be found in the section on the specific implementation of the nuclear power SBO diesel generator set control system; repeated details will not be elaborated upon. Figure 2 As shown, the method includes: Step 201: Upon receiving an emergency signal, generate a mode switching command to switch the test mode of the test control module to the emergency mode of the emergency control module.

[0079] Step 202: Based on the mode switching command, control the disconnection of the test control module and the test control path of the diesel generator set, and connect the emergency control module and the emergency path of the diesel generator set.

[0080] Step 203: Obtain the first operating status of the diesel generator set.

[0081] Step 204: Generate an operation report based on the first operating state.

[0082] The operational report includes whether the emergency access route has been disconnected.

[0083] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application, and this application is not limited to the above embodiments. It is understood that other improvements and variations directly derived or conceived by those skilled in the art without departing from the spirit and concept of this application should be considered to be included within the protection scope of this application.

Claims

1. A control system for a nuclear power SBO diesel generator set, characterized in that, The system includes: an emergency control module, a test control module, a mode switching module, and a signal isolation module; The emergency control module and the test control module are respectively connected to the diesel generator set; The emergency control module and the test control module are isolated by the signal isolation module; The mode switching module is used to generate a mode switching instruction to switch the test mode of the test control module to the emergency mode of the emergency control module when an emergency signal is received, and to send the mode switching instruction to the emergency control module. The emergency control module is used to control the disconnection of the test control path between the test control module and the diesel generator set, and to connect the emergency control module and the diesel generator set, based on the mode switching command; to obtain the first operating status of the diesel generator set; and to transmit the first operating status unidirectionally to the test control module based on the signal isolation module. The test control module is used to generate an operation report based on the first operating state, and to transmit the operation report unidirectionally to the emergency control module based on the signal isolation module, wherein the operation report includes whether to indicate that the emergency path is disconnected.

2. The nuclear power SBO diesel generator set control system according to claim 1, characterized in that, The test control module is further configured to, when the current operating mode is determined to be test mode, acquire the second operating state of the diesel generator set; test the generator set based on a preset test instance and the second operating state, obtain test results, and send the test results to the emergency control module, wherein the test results include whether the diesel generator set has an emergency fault; The emergency control module is used to, upon receiving the mode switching command and determining, based on the test results, that the generator set does not have an emergency fault, control the disconnection of the test control path between the test control module and the diesel generator set, and connect the emergency control module to the emergency path between the diesel generator set.

3. The nuclear power SBO diesel generator set control system according to claim 1 or 2, characterized in that, The signal isolation module includes: an optical coupler isolation unit, a communication isolation unit, and physical location isolation requirements between the emergency control module and the test control module; Wherein, the isolation voltage of the optocoupler unit is greater than a preset voltage; The communication isolation unit includes an optical fiber and a PLC remote I / O station, wherein the PLC remote I / O station is located in the emergency control module.

4. The nuclear power SBO diesel generator set control system according to claim 3, characterized in that, The first data transmission path for the emergency control module to transmit data to the test control module includes: the emergency control module is connected to the input terminal of the optical coupler isolation unit, and the output terminal of the optical coupler isolation unit is connected to the DI module of the PLC remote I / O station; wherein, the PLC remote I / O station communicates with the test control module via optical fiber; The second data transmission path for the test control module to transmit data to the emergency control module includes: the DO module of the PLC remote I / O station is connected to the input terminal of the optocoupler isolation unit, and the output terminal of the optocoupler isolation unit is connected to the emergency control module.

5. The nuclear power SBO diesel generator set control system according to claim 4, characterized in that, The emergency control module includes: a safety-grade intermediate relay; The test control module includes: a programmable logic controller; When the emergency control module communicates data with the test control module, the first operating state is transmitted sequentially to the programmable logic controller through the safety-level intermediate relay contact, the optocoupler isolation unit corresponding to the uplink direction, the DI module, and the optical fiber. When the test control module communicates data with the emergency control module, the start command for instructing the emergency control module to start the diesel generator set is sequentially transmitted through the programmable logic controller, optical fiber, DO module, and the corresponding optocoupler isolation unit in the downlink direction to the safety-level intermediate relay.

6. The nuclear power SBO diesel generator set control system according to claim 1 or 2, characterized in that, The mode switching module includes: a mode switching switch; The mode switching switch is used to generate a mode switching command in response to user operation, switching the test mode of the test control module to the emergency mode of the emergency control module.

7. The nuclear power SBO diesel generator set control system according to claim 1 or 2, characterized in that, The emergency control module is connected to an uninterruptible power supply. The test control module is connected to an AC / DC power supply.

8. The nuclear power SBO diesel generator set control system according to claim 1 or 2, characterized in that, The emergency control module includes: a safety-grade intermediate relay and a hard-wired logic circuit; The safety-grade intermediate relay is connected to the corresponding actuator of the diesel generator set through a hard-wired logic circuit. The actuator includes a start solenoid valve, a fuel solenoid valve, and a closing coil of the generator output circuit breaker. The test control module includes a programmable logic controller.

9. The nuclear power SBO diesel generator set control system according to claim 1 or 2, characterized in that, The emergency signals include one or more of the following: a power outage signal when a power failure occurs and an instruction signal from the user to start the diesel generator set using the emergency control module.

10. A nuclear power SBO diesel generator set control method based on the nuclear power SBO diesel generator set control system according to any one of claims 1-9, characterized in that, The method includes: Upon receiving an emergency signal, a mode switching command is generated to switch the test mode of the test control module to the emergency mode of the emergency control module. Based on the mode switching command, the test control path between the test control module and the diesel generator set is cut off, and the emergency control path between the emergency control module and the diesel generator set is connected; the first operating state of the diesel generator set is obtained. An operation report is generated based on the first operating status, wherein the operation report includes whether the emergency access route is disconnected.

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