阅读说明：本技术 一种核电站多样性保护系统和核电站 (Nuclear power station diversity protection system and nuclear power station ) 是由 孙娜 张�杰 蒋波 孟光 王占元 叶琳 孙元君 张瑞萍 吕爱国 于 2018-05-31 设计创作，主要内容包括：本发明提供一种核电站多样性保护系统和核电站,所述核电站多样性保护系统包括：现场控制层和工艺信号接口层,所述现场控制层和所述工艺信号接口层电连接；所述现场控制层包括信号处理装置和至少三个控制装置,所述至少三个控制装置分别与所述信号处理装置电连接；所述工艺信号接口层包括检测装置和执行装置,所述检测装置分别与所述至少三个控制装置电连接,所述执行装置与所述信号处理装置电连接。本发明实施例提供的多样性保护系统的可靠性较好。(The invention provides a nuclear power station diversity protection system and a nuclear power station, wherein the nuclear power station diversity protection system comprises: the field control layer is electrically connected with the process signal interface layer; the field control layer comprises a signal processing device and at least three control devices, and the at least three control devices are electrically connected with the signal processing device respectively; the process signal interface layer comprises a detection device and an execution device, the detection device is electrically connected with the at least three control devices respectively, and the execution device is electrically connected with the signal processing device. The diversity protection system provided by the embodiment of the invention has better reliability.)

1. the utility model provides a nuclear power station diversity protection system, is applied to the nuclear power station which characterized in that, nuclear power station diversity protection system includes: the field control layer is electrically connected with the process signal interface layer;

The field control layer comprises a signal processing device and at least three control devices, and the at least three control devices are electrically connected with the signal processing device respectively;

the process signal interface layer comprises a detection device and an execution device, the detection device is electrically connected with the at least three control devices respectively, and the execution device is electrically connected with the signal processing device;

The control device is used for receiving a detection signal sent by the detection device and sending a first signal or a second signal to the signal processing device according to the detection signal, the first signal is used for controlling the signal processing device to send a target signal to the execution device, the second signal is used for controlling the signal processing device not to send the target signal to the execution device, and the target signal is used for controlling the execution device to execute target operation;

The signal processing device is used for sending the target signal to the executing device when receiving the first signal sent by the control device which exceeds the target number in the at least three control devices.

2. The plant diversity protection system of claim 1, further comprising a monitoring layer electrically connected to the site control layer, wherein the actuator comprises a driver for driving an ad hoc safety facility or driving a turbine trip, and an actuator for controlling a reactor shutdown, wherein the target signal comprises: at least one of a safety facility driving signal, a steam turbine tripping signal and a reactor shutdown signal is specially set;

The detection device is used for detecting the state of a reactor in the nuclear power station and sending a parameter signal of the reactor to the control device;

The control device is used for receiving the parameter signal of the reactor, and when the value of the parameter signal of the reactor is not in a preset range, the control device sends the first signal to the signal processing device;

the monitoring layer is used for displaying a status signal sent by the control device in the field control layer, and the status signal includes: alarm signals or display fault signals.

3. The nuclear power plant diversity protection system of claim 2, wherein the supervisory layer comprises an Emergency Control Panel (ECP) and/or a backup control panel (BUP), wherein each of the ECP and the BUP has a manually operated switch disposed thereon for triggering at least one of a reactor shutdown, a turbine shutdown, and a drive section dedicated safety facility.

4. the nuclear power plant diversity protection system of claim 3, wherein the ECP is provided with a drive switch electrically connected to a first processor included in a reactor protection system in the nuclear power plant via a first hard wire;

When the first processor works and the driving switch is in an open state, the special safety facility is driven by the first processor or the control device;

and when the first processor stops working and the driving switch is in an open state, the special safety facility is driven by the control device.

5. The nuclear power plant diversity protection system of claim 4, wherein a synchronous control module is further disposed between the reactor protection system and the nuclear power plant diversity protection system, and the synchronous control module is electrically connected to the reactor protection system and the nuclear power plant diversity protection system through a second hard wire, respectively, and the synchronous control module is configured to synchronize a time signal in the reactor protection system with a time signal in the nuclear power plant diversity protection system.

6. The nuclear power plant diversity protection system of claim 4, wherein when the detection device includes the sensor, the reactor protection system does not share the sensor with the process signal interface layer;

When the execution device includes the driver and the actuator, the reactor protection system does not share the driver and the actuator with the process signal interface layer.

7. The nuclear power plant diversity protection system of any of claims 1 to 6, comprising a first power supply and a second power supply, the first and second power supplies being redundant of each other.

8. The nuclear power plant diversity protection system of any of claims 1 to 6, electrically connected to a non-safety system comprised by the nuclear power plant, wherein the control device is a control cabinet comprising a signal acquisition module, a main processing module, a signal input module and a communication module;

The signal input end of the main processing module is connected with the signal acquisition module, the input/output end of the main processing module is connected with the communication module, the signal output end of the main processing module is connected with the signal output module, the signal acquisition module is used for receiving the detection signal sent by the detection device, the main processing module is used for processing the detection signal, the signal output module is used for sending the first signal or the second signal to the signal processing device, and the communication module is used for carrying out data communication with the non-safety-level system.

9. the nuclear power plant diversity protection system of any one of claims 1 to 6, wherein the control devices are each Field Programmable Gate Array (FPGA) chips.

10. A nuclear power plant comprising a reactor protection system and a nuclear power plant diversity protection system as claimed in any one of claims 1 to 9.

Technical Field

the invention relates to the technical field of safety control of nuclear power plants, in particular to a diversity protection system of a nuclear power plant and the nuclear power plant.

Background

With the progress of science and technology, people have more and more profound understanding on nuclear power. Currently, nuclear power becomes a part of factory power utilization or domestic power utilization. In a nuclear power plant for generating electricity, a reactor protection system is generally provided to protect the safety of the nuclear power plant, and when the reactor protection system fails and cannot complete the safety protection function, the safety protection function of the nuclear power plant is realized by the diversity protection system of the nuclear power plant. In practical application, the current diversity protection system generally adopts a dual redundancy design, that is, two control cabinets are generally arranged, and when the results output by the two control cabinets are the same, the result is output by the whole diversity protection system. If one control cabinet fails, the diversity protection system cannot work normally, and therefore the reliability of the current diversity protection system is poor.

disclosure of Invention

The embodiment of the invention aims to provide a nuclear power station diversity protection system and a nuclear power station, and solves the problem that the current diversity protection system is poor in reliability.

In order to achieve the above object, an embodiment of the present invention provides a nuclear power plant diversity protection system, which is applied to a nuclear power plant, and includes: the field control layer is electrically connected with the process signal interface layer;

The field control layer comprises a signal processing device and at least three control devices, and the at least three control devices are electrically connected with the signal processing device respectively;

the process signal interface layer comprises a detection device and an execution device, the detection device is electrically connected with the at least three control devices respectively, and the execution device is electrically connected with the signal processing device;

The control device is used for receiving a detection signal sent by the detection device and sending a first signal or a second signal to the signal processing device according to the detection signal, the first signal is used for controlling the signal processing device to send a target signal to the execution device, the second signal is used for controlling the signal processing device not to send the target signal to the execution device, and the target signal is used for controlling the execution device to execute target operation;

The signal processing device is used for sending the target signal to the executing device when receiving the first signal sent by the control device which exceeds the target number in the at least three control devices.

Optionally, the nuclear power plant diversity protection system further includes a monitoring layer, the monitoring layer is electrically connected to the field control layer, the executing device includes a driver and an actuator, the driver is used to drive a dedicated safety facility or drive a steam turbine to trip, the actuator is used to control reactor shutdown, and the target signal includes: at least one of a safety facility driving signal, a steam turbine tripping signal and a reactor shutdown signal is specially set;

The detection device is used for detecting the state of a reactor in the nuclear power station and sending a parameter signal of the reactor to the control device;

the control device is used for receiving the parameter signal of the reactor, and when the value of the parameter signal of the reactor is not in a preset range, the control device sends the first signal to the signal processing device;

the monitoring layer is used for displaying a status signal sent by the control device in the field control layer, and the status signal includes: alarm signals or display fault signals.

optionally, the monitoring layer includes an Emergency Control Panel (ECP) and/or a Backup Control Panel (BUP), wherein both the ECP and the BUP are provided with a manual operation switch, and the manual operation switch is used for triggering at least one of reactor shutdown, turbine shutdown and safety equipment specially provided for a driving part.

Optionally, a driving switch is arranged on the ECP, and the driving switch is electrically connected to a first processor included in a reactor protection system in the nuclear power plant through a first hard wire;

when the first processor works and the driving switch is in an open state, the special safety facility is driven by the first processor or the control device;

And when the first processor stops working and the driving switch is in an open state, the special safety facility is driven by the control device.

Optionally, a synchronous control module is further arranged between the reactor protection system and the nuclear power station diversity protection system, the synchronous control module is respectively electrically connected with the reactor protection system and the nuclear power station diversity protection system through a second hard wire, and the synchronous control module is used for synchronizing time signals in the reactor protection system and time signals in the nuclear power station diversity protection system.

Optionally, when the detection device comprises the sensor, the reactor protection system does not share the sensor with the process signal interface layer;

When the execution device includes the driver and the actuator, the reactor protection system does not share the driver and the actuator with the process signal interface layer.

Optionally, the nuclear power plant diversity protection system includes a first power supply device and a second power supply device, and the first power supply device and the second power supply device are redundant to each other.

Optionally, the diversity protection system of the nuclear power plant is electrically connected to a non-safety-level system included in the nuclear power plant, the control device is a control cabinet, and the control cabinet includes a signal acquisition module, a main processing module, a signal input module and a communication module;

The signal input end of the main processing module is connected with the signal acquisition module, the input/output end of the main processing module is connected with the communication module, the signal output end of the main processing module is connected with the signal output module, the signal acquisition module is used for receiving the detection signal sent by the detection device, the main processing module is used for processing the detection signal, the signal output module is used for sending the first signal or the second signal to the signal processing device, and the communication module is used for carrying out data communication with the non-safety-level system.

Optionally, the control devices all use Field-Programmable Gate Array (FPGA) chips.

The embodiment of the invention also provides a nuclear power station which comprises a reactor protection system and the nuclear power station diversity protection system.

one of the above technical solutions has the following advantages or beneficial effects:

The diversity protection system for the nuclear power station provided by the embodiment of the invention comprises: the field control layer is electrically connected with the process signal interface layer and comprises a signal processing device and at least three control devices, and the signal processing device is used for sending target signals to the execution devices included in the process signal interface layer when receiving first signals sent by the control devices with the number exceeding the target number in the at least three control devices. Therefore, even if the control device fails, the diversified protection system can work normally, so that the reliability of the diversified protection system is good.

Drawings

Fig. 1 is a structural diagram of a diversity protection system of a nuclear power plant according to an embodiment of the present invention;

fig. 2A is a logic diagram of a control device of a nuclear power plant diversity protection system according to an embodiment of the present invention;

FIG. 2B is a block diagram of a nuclear power plant diversity protection system according to another embodiment of the present invention;

Fig. 3 is a connection relationship diagram between a control device of a nuclear power plant diversity protection system and an ECP according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating an example of a nuclear power plant diversity protection system according to an embodiment of the present invention;

Fig. 5 is a second example diagram of a nuclear power plant diversity protection system according to an embodiment of the present invention;

Fig. 6 is a structural diagram of a control device of a nuclear power plant diversity protection system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a nuclear power plant diversity protection system, which is applied to a nuclear power plant, and includes: the field control layer 2 is electrically connected with the process signal interface layer 3; the field control layer 2 comprises a signal processing device 202 and at least three control devices 201, wherein the at least three control devices 201 are electrically connected with the signal processing device 202 respectively;

the process signal interface layer 3 comprises a detection device 301 and an execution device 302, wherein the detection device 301 is electrically connected with the at least three control devices 201 respectively, and the execution device 302 is electrically connected with the signal processing device 202;

The control device 201 is configured to receive a detection signal sent by the detection device 301, and send a first signal or a second signal to the signal processing device 202 according to the detection signal, where the first signal is used to control the signal processing device 202 to send a target signal to the execution device 302, the second signal is used to control the signal processing device 202 not to send the target signal to the execution device 302, and the target signal is used to control the execution device 302 to execute a target operation;

The signal processing device 202 is configured to send the target signal to the executing device 302 when receiving the first signal sent by more than a target number of the at least three control devices 201.

the working principle of the embodiment may be as follows: the signal processing device 202, upon receiving the first signal transmitted by the control device 201 exceeding the target number of the at least three control devices 201, transmits a target signal to the execution device 302, for example: when three control devices 201 are included in the nuclear power plant diversity protection system, the signal processing device 202 may send a target signal to the execution device 302 when receiving a first signal sent by two or more of the control devices 201, such as a driving signal for driving a turbine to rotate to a driver, or a control signal for controlling a reactor shutdown to an actuator, and so on. Referring to fig. 2A, fig. 2A is a logical expression of a signal processing apparatus including three control apparatuses. X1, X2, and X3 respectively denote signals output from the respective control devices, OUT denotes an output signal of the signal processing device, and is an and gate at 203 and an or gate at 204. For example: when X1 and X2 are both the first signal, X3 is the second signal, and OUT is the first signal; when one of X1 and X2 is the first signal and X3 is the first signal, OUT is also the first signal; when both X1 and X2 are the second signal, OUT is the second signal regardless of whether X3 is the first signal or the second signal. In summary, OUT is the first signal as long as at least two of X1, X2, and X3 are the first signals. A specific logical expression is OUT ═ X1 × X2+ (X1+ X2) × X3.

It should be noted that the control devices may all adopt the 201 identifier, and the detection devices may all adopt the 301 identifier.

In addition, when four control devices 201 are included in the nuclear power plant diversity protection system, the signal processing device 202 receives the first signal transmitted by two of the control devices 201 and receives the second signal transmitted by the other two control devices 201, that is, when the number of the received first signal and the number of the received second signal are equal, the signal processing device 202 transmits the target signal to the execution device 302. When the number of the received first signals is greater than the number of the received second signals, the signal processing apparatus 202 may also send the target signal to the executing apparatus 302. The signal processing means 202 does not transmit the target signal to the execution means 302 only when the number of received first signals is smaller than the number of received second signals. It should be noted that the control device 201 is driven only when receiving the charging signal, that is, the first signal may be a charging signal, and the second signal may be a non-charging signal, so that the control device 201 outputs the target signal only when receiving the charging signal, thereby reducing the possibility that the control device 201 outputs the target signal by mistake. The reliability of the nuclear power station diversity protection system is further improved.

the signal processing device 202 may be a relay, a contactor, or the like, and the specific type is not limited herein.

The diversity protection system for the nuclear power station provided by the embodiment of the invention comprises: the field control layer is electrically connected with the process signal interface layer and comprises a signal processing device and at least three control devices, and the signal processing device is used for sending target signals to the execution devices included in the process signal interface layer when receiving first signals sent by the control devices with the number exceeding the target number in the at least three control devices. Therefore, even if the control device fails, the diversified protection system can work normally, so that the reliability of the diversified protection system is good.

Optionally, as shown in fig. 2B, the nuclear power plant diversity protection system further includes a monitoring layer 1, the monitoring layer 1 is electrically connected to the field control layer 2, the executing device 302 includes a driver and an actuator, the driver is used to drive a dedicated safety facility or drive a steam turbine to trip, the actuator is used to control reactor shutdown, and the target signal includes: at least one of a safety facility driving signal, a steam turbine tripping signal and a reactor shutdown signal is specially set;

The detection device 301 is configured to detect a state of a reactor in the nuclear power plant and send a parameter signal of the reactor to the control device 201;

the control device 201 is configured to receive a parameter signal of the reactor, and when a value of the parameter signal of the reactor is not within a preset range, the control device 201 sends the first signal to the signal processing device 202;

The monitoring layer 1 is configured to display a status signal sent by the control device 201 in the field control layer 2, where the status signal includes: alarm signals or display fault signals.

wherein the parameter signals of the reactor may include: at least one of a pressure parameter, a temperature parameter, a water level parameter, and a reaction element parameter in the nuclear reactor, and the preset range is not specifically determined here. For example: the preset range of the pressure parameter can be 100 to 800 kilopascals and the like, and the preset range of the temperature parameter can be 100 to 500 degrees celsius and the like.

wherein, when the target signal includes a dedicated security facility driving signal, the driver drives the dedicated security facility; when the target signal comprises a steam turbine tripping signal, the driver drives the steam turbine to trip; when the target signal comprises a reactor shutdown signal, the actuator controls the reactor shutdown.

It should be noted that the dedicated safety facilities may include a safety injection system or a waste heat removal system.

the field control layer 2 may receive an instruction sent by the monitoring layer 1, and may also feed back a status signal of a device included in the field control layer to the monitoring layer 1. For example: the monitoring layer 1 may receive a status signal, such as a normal operation or a fault, sent by the control device 201 in the field control layer 2, where the status signal may be, for example, an alarm signal or a display fault signal.

In the embodiment of the invention, the nuclear power station diversity protection system also comprises a monitoring layer, and a monitoring picture can be observed or the control of the field control layer can be realized through the monitoring layer, so that the control or the monitoring of the field control layer can be better realized. In addition, the execution device comprises a driver and an actuator, the driver is used for driving the special safety facility or driving the steam turbine to trip, and the actuator is used for controlling the reactor to stop, so that the division of labor is more definite, and the regulation and control of the special safety facility, the steam turbine and the reactor can be better realized.

Optionally, as shown in fig. 2B, the monitoring layer 1 includes an ECP101 and/or a BUP, where the ECP101 and the BUP are both provided with a manual switch, and the manual switch is used to trigger at least one of a reactor shutdown, a turbine shutdown, and a safety facility dedicated to a driving part.

The manual switch may be directly connected to the executing device, or may be connected to the executing device through the control device and the signal processing device, and the specific form is not limited herein.

in addition, display instruments can be arranged on the ECP101 and the BUP, and a user can control or monitor the nuclear power plant diversity protection system through virtual buttons on the display instruments.

when an emergency occurs in the nuclear power station, at least one of reactor shutdown, turbine shutdown and safety facilities specially designed for a driving part needs to be controlled, and the emergency can be realized by manually operating a switch.

As shown in fig. 3, among other things, ECP101 may include at least one of a computer-like device, a manually operated switch 1011, and a display meter. The computer-like device, i.e., the operator station 1014 with a display unit, may allow a user to touch virtual buttons on the display unit to implement control functions. Of course, the display unit can also display the flow chart, the monitoring picture and the like of the whole nuclear power plant diversity protection system, so that the monitoring function is realized. The ECP101 may further include a gateway 1012 and a server 1013, the control device 201 may include a signal input/output module 2011, a communication module 2012, and the like, the signal input/output module 2011 is electrically connected to the manual operation switch 1011, and when the computer-like device fails, the manual operation switch 1011 and the signal input/output module 2011 may send a control instruction to the execution device, for example: and sending a control signal for controlling the reactor shutdown to an actuator. The communications module 2012 is electrically coupled to the gateway 1012, the server 1013, and the operator station 1014 to thereby implement the monitoring layer and field control layer electrical connections.

It should be noted that the ECP in fig. 3 may also be a BUP, and the BUP has the same components and can achieve the same beneficial technical effects as the ECP.

In the embodiment of the invention, the monitoring layer comprises the ECP and the BUP, and the ECP and the BUP are both provided with the manual operation switches, so that when an emergency occurs in the nuclear power station, the reactor shutdown, the turbine shutdown or the special safety facilities of the driving part can be rapidly controlled. The safety of the nuclear power station is further improved.

Optionally, as shown in fig. 2B, a driving switch is disposed on the ECP101, and the driving switch is electrically connected to a first processor included in a reactor protection system in the nuclear power plant through a first hard wire;

when the first processor works and the driving switch is in an on state, the special safety facility is driven by the first processor or the control device 201;

When the first processor stops working and the driving switch is in an on state, the control device 201 drives the special safety facility.

When the reactor protection system is in the operating state and the driving switch is in the on state, the dedicated safety facility may be driven by the first processor, and of course, the dedicated safety facility may also be driven by the control device 201 and the signal processing device 202. When the first processor or other components in the reactor protection system stop working, the dedicated safety facilities can only be driven by the control device 201 and the signal processing device 202. For example: as shown in fig. 4, the ECP401 is connected to a first processor of the reactor protection system 402, and the first processor includes a signal acquisition module 4021, a logic processing module 4022, and a signal output module 4023, and after the first processor completes signal acquisition, logic processing, signal output, and the like, the processing signal is sent to a priority management module 4024, and similarly, a manual driving signal output by the ECP401 may also be processed by a control device 4031 and a signal processing device 4032 included in the nuclear power plant diversity protection system 403 and input to the priority management module 4024 in the reactor protection system 402, and the priority management module 4024 controls driving of the dedicated safety facility 404 according to the received signal. When the manual driving signal is input to the reactor protection system 402, signal isolation is required to prevent interference from the signal in the reactor protection system 402. Of course, the ECP401 may output an automatic driving signal, and is not limited herein. When the first processor in the reactor protection system 402 stops operating, the ECP401 can only realize the function of controlling the driving of the dedicated safety facility 404 through the control device 4031 and the signal processing device 4032 in the nuclear power plant diversity protection system 403. In addition, a synchronization control module 405 is further disposed between the reactor protection system 402 and the plant diversity protection system 403, and is configured to synchronize time signals between the reactor protection system 402 and the plant diversity protection system 403. Of course, other signals may be synchronized, such as: frequency signals, etc.

in addition, the manual driving signal may be in the form of a hard-wired command or a communication command, and the specific form is not limited herein.

it should be noted that the dedicated safety facilities may perform the function of adjusting the safety of the whole reactor or a part of the equipment, such as: the dedicated safety facilities may be used to regulate the safety of the nuclear power plant diversity protection system or the reactor protection system.

In the embodiment of the invention, the driving switch is arranged on the ECP, so that when the special safety facilities are driven, the special safety facilities can be driven through the first processor included in the reactor protection system and also through the control device and the signal processing device included in the nuclear power station diversity protection system, and thus, the mode of driving the special safety facilities is more diversified, and the stability of the nuclear power station is better.

Optionally, as shown in fig. 4, a synchronization control module 405 is further disposed between the reactor protection system 402 and the nuclear power plant diversity protection system 403, the synchronization control module 405 is electrically connected to the reactor protection system 402 and the nuclear power plant diversity protection system 403 through a second hard wire, and the synchronization control module 405 is configured to synchronize a time signal in the reactor protection system 402 and a time signal in the nuclear power plant diversity protection system 403.

In the embodiment of the invention, when the reactor protection system works, time signals in the reactor protection system and the nuclear power station diversity protection system need to be synchronized at the moment, so that the phenomenon that the reactor protection system and the nuclear power station diversity protection system output driving signals at different times due to the fact that the time signals are not synchronized is avoided, and the purpose of repeatedly driving the special safety facilities is achieved.

optionally, as shown in fig. 2B, when the detection device 301 includes the sensor, the reactor protection system does not share the sensor with the process signal interface layer 3;

When the executive device 302 includes the driver and the actuator, the reactor protection system does not share the driver and the actuator with the process signal interface layer 3.

the reactor protection system and the process signal interface layer 3 may or may not share a sensor, a driver, and an actuator, that is, the reactor protection system and the process signal interface layer all have a sensor, a driver, and an actuator. For example: referring to fig. 5, a reactor protection system 501 shares sensors 503 and drivers with a nuclear power plant diversity protection system 502. Specifically, a sensor signal detected by the sensor 503 is distributed by the signal isolation distribution module 5011, and may be input to the logic processing module 5012 in the reactor protection system 501, or may be input to the control cabinet 5022 in the nuclear power plant diversity protection system 502, and the logic processing module 5012 processes the sensor signal, and may directly input the processed sensor signal to the priority management module 5013, and controls the driving of the special safety setting 505; similarly, the control cabinet 5022 in the nuclear power plant diversity protection system 502 processes the sensor signal, and the output automatic signal is processed by the relay 5023 and then sent to the priority management module 5013, so as to control the driving of the special safety setting 505. It should be noted that, a manual switch is provided on the ECP5021 (or a BUP may be used to replace the ECP), and a manual signal triggered by the manual switch is processed by the control cabinet 5022 and the relay 5023 and then sent to the priority management module 5013, so as to control the driving of the dedicated security setting 505. In addition, when both the automatic signal and the manual signal are transmitted in the reactor protection system 501, signal isolation is required by the signal isolation module 5014. Of course, the nuclear power plant diversity protection system 502 may output not only a control signal for controlling the driving of the dedicated safety setting 505, but also a control signal for controlling the operation of the shutdown breaker 504 to the shutdown breaker 504, so as to shutdown the reactor.

it should be noted that the reactor protection system and the process signal interface layer 3 preferably do not share sensors, drivers and actuators. Therefore, the independence of the reactor protection system and the nuclear power station diversity protection system can be ensured, and the phenomenon of mutual interference between the reactor protection system and the nuclear power station diversity protection system is reduced, so that the reactor protection system and the nuclear power station diversity protection system can better perform functions.

In the embodiment of the invention, the reactor protection system and the process signal interface layer do not share a sensor, a driver and an actuator, so that the independence of the system between the reactor protection system and the diversity protection system of the nuclear power station can be better ensured.

optionally, the nuclear power plant diversity protection system includes a first power supply device and a second power supply device, and the first power supply device and the second power supply device are redundant to each other.

The first power supply device and the second power supply device can be any one of a 220-volt alternating current power supply and a 220-volt direct current power supply. Of course, it is preferable that the first power supply device is a 220 v ac power supply and the second power supply device is a 220 v dc power supply. Thus, a power interruption of less than 20 milliseconds does not disturb the output of the plant diversity protection system.

In the embodiment of the invention, the nuclear power station diversity protection system comprises the first power supply device and the second power supply device which are redundant with each other, so that the influence of power interruption on the functions of the nuclear power station diversity protection system can be reduced, and the reliability of the nuclear power station diversity protection system is further improved.

Optionally, as shown in fig. 2B, the diversity protection system of the nuclear power plant is electrically connected to a non-safety system included in the nuclear power plant, the control device 201 is a control cabinet, and the control cabinet includes a signal acquisition module, a main processing module, a signal input module, and a communication module;

The signal input end of the main processing module is connected with the signal acquisition module, the input/output end of the main processing module is connected with the communication module, the signal output end of the main processing module is connected with the signal output module, the signal acquisition module is used for receiving the detection signal sent by the detection device 301, the main processing module is used for processing the detection signal, the signal output module is used for sending the first signal or the second signal to the signal processing device 202, and the communication module is used for carrying out data communication with the non-safety system. For example, referring to fig. 6, the control device 201 is a control cabinet, and the control cabinet includes a signal acquisition module 2013, a main processing module 2014, a signal input module 2015, and a communication module 2012, where the communication module 2012 can perform data communication with the non-security level system shown in fig. 2B.

Note that a in fig. 2B indicates a non-security level system.

In the embodiment of the invention, the control device is a control cabinet, and the control cabinet comprises a signal acquisition module, a main processing module, a signal input module and a communication module, so that the division of labor of the modules included in the control cabinet is more definite, and the control cabinet has higher processing efficiency and higher processing speed.

Optionally, as shown in fig. 2B, the control devices 201 all use FPGA chips.

Wherein, each part in the nuclear power station diversity protection system all can adopt FPGA technique, also can adopt traditional analog technology to realize, for example: custom circuit technology, or programmable device gate technology, etc. Therefore, the nuclear power station diversity protection system is more diversified.

In the embodiment of the invention, the control device adopts the FPGA chip, so that the control device has longer service life, better stability and lower use cost.

it should be noted that the nuclear power plant diversity protection system provided by the embodiment of the present invention may be used in nuclear power plants of different reactor types, and the nuclear power plant diversity protection system has two forms, namely hard wiring and a communication interface, supports an automatic driving function and a manual driving function, and has a good versatility.

The embodiment of the invention also provides a nuclear power station which comprises a reactor protection system and the nuclear power station diversity protection system.

The nuclear power plant provided by the embodiment of the invention has the same technical effect as the nuclear power plant diversity protection system due to the nuclear power plant diversity protection system in the embodiment, and details are not repeated herein.

the above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.