Nuclear energy steam supply control system

Abstract

The invention specifically relates to a nuclear energy steam supply control system comprising a monitoring control layer used for generating a field man-machine interaction signal and displaying a field operation signal, a field alarm signal and a field man-machine interaction signal on a field man-machine interaction picture; the field control layer is used for performing field alarm logic operation on the acquired field operation signal to generate a field alarm signal, and performing field control logic operation on the field man-machine interaction signal to generate a field control signal; and the field actuator is used for adjusting the field operation signal according to the field control signal. According to the invention, field operators can monitor and control the operation of the nuclear energy steam supply station.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear energy steam supply control, and in particular to a nuclear energy steam supply control system. Background Art

[0002] The nuclear energy steam supply station adopts steam conversion technology to convert the secondary circuit steam of the nuclear power plant into industrial steam through the steam conversion device, and then transports the industrial steam to the steam-using enterprises through the industrial steam pipeline network.

[0003] After the nuclear energy steam supply station is put into operation, the two units will each operate at part of the load during normal operation. When one unit is shut down, the other unit will assume the full load.

[0004] In order to ensure the safe and stable operation of the nuclear energy steam supply station, it is necessary to design a nuclear energy steam supply control system to realize the monitoring and control of the nuclear energy steam supply station site. Summary of the invention

[0005] The object of the present invention is to provide a nuclear power plant industrial steam supply control system to enable operators of nuclear energy steam supply stations to monitor and control the operation of the nuclear energy steam supply stations.

[0006] In order to achieve the above object, the present invention provides a nuclear energy steam supply control system for an operator to monitor and control the on-site operation of a nuclear energy steam supply station, comprising:

[0007] The monitoring control layer is used for the operator to perform on-site human-machine interaction on the on-site human-machine interaction screen, generate on-site human-machine interaction signals and send them to the on-site control layer; receive on-site operation signals and on-site alarm signals sent by the on-site control layer; and display on-site operation signals, on-site alarm signals and on-site human-machine interaction signals on the on-site human-machine interaction screen;

[0008] The field control layer is used to collect field operation signals from the field actuators; perform field alarm logic operations on the field operation signals to generate field alarm signals; send the field operation signals and field alarm signals to the monitoring control layer; receive the field human-machine interaction signals sent by the monitoring control layer; perform field control logic operations on the field human-machine interaction signals to generate field control signals and send them to the field actuators;

[0009] The field actuator is used to receive the field control signal sent by the field control layer and adjust the field operation signal according to the field control signal.

[0010] As one of the possible implementation methods, the field control layer includes I / O control cabinets; the monitoring control layer includes engineer stations and operation stations;

[0011] The engineer station is used to configure and compile the on-site human-machine interaction screen to generate the on-site human-machine interaction screen; configure and compile the on-site control logic to generate the on-site control logic; configure and compile the on-site alarm logic to generate the on-site alarm logic; download the on-site control logic and on-site alarm logic to the I / O control cabinet, and download the on-site human-machine interaction screen to the operator station;

[0012] The operator station is used to run the on-site human-machine interaction screen; the operator performs on-site human-machine interaction on the on-site human-machine interaction screen, generates on-site human-machine interaction signals and sends them to the I / O control cabinet; receives on-site alarm signals and on-site operation signals sent by the I / O control cabinet; displays on-site alarm signals, on-site operation signals and on-site human-machine interaction signals on the on-site human-machine interaction screen;

[0013] The I / O control cabinet is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal and send it to the on-site actuator; collect the on-site operation signal from the on-site actuator; perform on-site alarm logic operation on the on-site operation signal to generate a on-site alarm signal; and send the on-site operation signal and the on-site alarm signal to the operator station;

[0014] The field actuator is used to receive the field control signal sent by the I / O control cabinet and adjust the field operation signal according to the field control signal.

[0015] As one of the feasible ways, the I / O control cabinet is provided with a Profibus DP bus, an input / output module and two controllers; the two controllers are mutually redundant, one controller is a main controller and the other controller is a standby controller; the two controllers are respectively connected to the input / output module via the Profibus DP bus; the input / output module is connected to the field actuator;

[0016] Engineer station, used to synchronously download the field control logic and field alarm logic to the active controller and standby controller;

[0017] The operator station is used to synchronously send the on-site human-machine interaction signals to the main controller and the standby controller; receive the on-site alarm signals and on-site operation signals sent by the main controller; and display the on-site alarm signals and on-site operation signals sent by the main controller on the on-site human-machine interaction screen;

[0018] The field actuator is used to collect the field operation signal and send it to the input and output module; receive the field control signal sent by the input and output module, and adjust the field operation signal according to the field control signal;

[0019] Input and output module, used to receive the field operation signal sent by the field actuator, and send the field operation signal to the main controller and the standby controller synchronously; receive the field control signal sent by the main controller and send it to the field actuator;

[0020] The main controller is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal and send it to the input and output module; receive the on-site operation signal sent by the on-site actuator; perform on-site alarm logic operation on the on-site operation signal to generate a on-site alarm signal; and send the on-site operation signal and the on-site alarm signal to the operator station;

[0021] The standby controller is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal; receive the on-site operation signal sent by the on-site actuator; perform on-site alarm logic operation on the on-site operation signal to generate a on-site alarm signal;

[0022] The main controller and the standby controller synchronously receive the on-site human-machine interaction signals sent by the operator station, synchronously perform on-site control logic operations on the on-site human-machine interaction signals, and synchronously generate on-site control signals; synchronously receive the on-site operation signals sent by the on-site actuators, synchronously perform on-site alarm logic operations on the on-site operation signals, and synchronously generate on-site alarm signals.

[0023] As one of the achievable methods, the active controller and the standby controller exchange synchronization signals and handshake signals in each operation cycle to ensure that both the active controller and the standby controller are ready for data exchange;

[0024] The standby controller follows the main controller through the synchronization signal. When the main controller freezes or fails, the main and standby controllers can be switched without any worries when the standby controller is working normally.

[0025] As one of the achievable methods, both the main controller and the standby controller are provided with a watchdog circuit and a fault self-checking circuit;

[0026] When the main controller crashes, the watchdog circuit of the main controller is activated, and the standby controller is switched to the main controller, and the main controller is switched to the standby controller;

[0027] When the main controller fails, the fault self-detection circuit of the main controller is activated to switch the standby controller to the main controller, and the main controller is switched to the standby controller.

[0028] As one of the achievable methods, the on-site human-computer interaction includes setting analog quantity signals and switch quantity signals, and the on-site human-computer interaction signals include analog quantity setting signals and switch quantity setting signals;

[0029] The field control signal and the field operation signal both include analog quantity signal and switch quantity signal;

[0030] Analog signals include liquid level signals, pressure signals, temperature signals and valve position opening signals, and switch signals include pump standby signals and valve interlock signals;

[0031] The analog setting signal includes a liquid level setting signal, a pressure setting signal, a temperature setting signal and a valve position opening setting signal;

[0032] The switch quantity setting signal includes the pump standby setting signal and the valve interlock switching setting signal.

[0033] As one of the achievable methods, the on-site human-machine interaction screen includes an on-site process flow chart, in which on-site operation signals, on-site human-machine interaction signals and on-site alarm signals are displayed;

[0034] In the on-site process flow chart, a standby button is set for mutually redundant pumps, and an interlock cut-off button is set for interlocked valves; by opening or closing the standby button of the pump and confirming it, a pump standby setting signal is generated; by opening or closing the interlock cut-off button of the valve and confirming it, a valve interlock switch setting signal is generated;

[0035] Performing on-site control logic operation on the pump's standby setting signal, and generating the pump's standby signal according to the pump's standby setting signal;

[0036] A field control logic operation is performed on the valve interlock cut-off setting signal, and a valve interlock signal is generated according to the valve interlock cut-off setting signal.

[0037] As one of the achievable methods, the on-site alarm signal includes an analog high limit alarm signal and an analog low limit alarm signal;

[0038] Performing on-site alarm logic operation on on-site operation signals to generate on-site alarm signals includes the following steps:

[0039] When the analog signal is lower than the set lower limit, an analog signal lower limit alarm signal is generated;

[0040] When the analog signal is higher than the set high limit, an analog signal high limit alarm signal is generated.

[0041] As one of the possible ways to achieve this, the field control layer also includes a historical station;

[0042] The operator station is also used to send on-site alarm signals, on-site operation signals and on-site human-machine interaction signals to the history station;

[0043] The history station is used to receive the on-site alarm signals, on-site operation signals and on-site human-computer interaction signals sent by the operator station; store, maintain and query the on-site operation signals, on-site alarm signals and on-site human-computer interaction signals.

[0044] As one of the feasible ways, the field control layer also includes a communication station; a switch quantity communication point and an analog quantity communication point are configured between the nuclear energy steam supply station and the nuclear power unit; the communication station collects the values ​​of the switch quantity communication point and the analog quantity communication point in real time;

[0045] The nuclear power unit sends a signal request to the communication station at a set frequency; the communication station receives the signal request sent by the nuclear power unit and sends the signal requested by the nuclear power unit to the nuclear power unit; the nuclear power unit receives the signal sent by the communication station and organizes and introduces it into the DCS screen of the nuclear power unit;

[0046] The signal request of the nuclear power unit is the value of the switch communication point and the analog communication point.

[0047] As one of the possible implementations, the monitoring and control layer also includes a printer and two ring networks; there are two operation stations and two history stations, one operation station also serving as an engineer station and a history station, and another operation station also serving as a communication station and another history station;

[0048] The field control layer also includes a network cabinet and two relays. There are four I / O control cabinets, with two I / O control cabinets corresponding to one relay cabinet. There are two switches in the network cabinet; the printer is connected to one of the ring networks, and each switch is connected to the two ring networks respectively; each operation station and each controller are equipped with two two-ring network segment network cards, each operation station is connected to the two ring networks respectively, and each controller is connected to the two ring networks and two switches respectively.

[0049] As one of the achievable methods, the field control layer further includes a power distribution cabinet; the power distribution cabinet receives two AC power supplies;

[0050] The power distribution cabinet is equipped with an AC power switching module. The power distribution cabinet will receive two AC power supplies through the AC power switching module for redundant switching, and provide working power for the I / O control cabinet, relay cabinet, network cabinet, operation console and printer respectively;

[0051] A DC power conversion module is provided in the I / O control cabinet. The I / O control cabinet receives the AC power provided by the power distribution cabinet, converts the AC power into DC power through the DC power conversion module, and provides working power for the input and output modules in the I / O control cabinet.

[0052] Beneficial technical effects of the present invention:

[0053] The nuclear energy steam supply control system of the present invention has an on-site human-machine interaction screen that displays on-site operation signals and on-site alarm signals. The operator performs on-site human-machine interaction on the on-site human-machine interaction screen, which is convenient for the operator to monitor and control on-site operation; the high redundancy design means that a single failure does not affect the system operation; the main controller and the backup controller operate simultaneously, and the main controller outputs the operation results, ensuring worry-free switching between the main controller and the backup controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of an embodiment of the nuclear energy steam supply control system of the present invention;

[0055] Figure 2 A schematic diagram of the redundant working principle of an embodiment of two controllers in an I / O controller;

[0056] Figure 3 A communication schematic diagram of an embodiment of a communication station and a nuclear power unit;

[0057] Figure 4 A schematic diagram of an embodiment of a human-computer interaction screen. DETAILED DESCRIPTION

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0059] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0061] refer to Figure 1 , shows a schematic structural diagram of an embodiment of a nuclear energy steam supply control system, wherein the nuclear energy steam supply control system is used by an operator to monitor and control the on-site operation of a nuclear energy steam supply station, and comprises:

[0062] The monitoring control layer is used for the operator to perform on-site human-machine interaction on the on-site human-machine interaction screen, generate on-site human-machine interaction signals and send them to the on-site control layer; receive on-site operation signals and on-site alarm signals sent by the on-site control layer; and display on-site operation signals, on-site alarm signals and on-site human-machine interaction signals on the on-site human-machine interaction screen;

[0063] The field control layer is used to collect field operation signals from the field actuators; perform field alarm logic operations on the field operation signals to generate field alarm signals; send the field operation signals and field alarm signals to the monitoring control layer; receive the field human-machine interaction signals sent by the monitoring control layer; perform field control logic operations on the field human-machine interaction signals to generate field control signals and send them to the field actuators;

[0064] The field actuator is used to receive the field control signal sent by the field control layer and adjust the field operation signal according to the field control signal.

[0065] In this embodiment, as one of the achievable methods, the field control layer includes an I / O control cabinet; the monitoring control layer includes an engineer station and an operation station;

[0066] The engineer station is used to configure and compile the on-site human-machine interaction screen to generate the on-site human-machine interaction screen; configure and compile the on-site control logic to generate the on-site control logic; configure and compile the on-site alarm logic to generate the on-site alarm logic; download the on-site control logic and on-site alarm logic to the I / O control cabinet, and download the on-site human-machine interaction screen to the operator station;

[0067] The operator station is used to run the on-site human-machine interaction screen; the operator performs on-site human-machine interaction on the on-site human-machine interaction screen, generates on-site human-machine interaction signals and sends them to the I / O control cabinet; receives on-site alarm signals and on-site operation signals sent by the I / O control cabinet; displays on-site alarm signals, on-site operation signals and on-site human-machine interaction signals on the on-site human-machine interaction screen;

[0068] The I / O control cabinet is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal and send it to the on-site actuator; collect the on-site operation signal from the on-site actuator; perform on-site alarm logic operation on the on-site operation signal to generate a on-site alarm signal; and send the on-site operation signal and the on-site alarm signal to the operator station;

[0069] The field actuator is used to receive the field control signal sent by the I / O control cabinet and adjust the field operation signal according to the field control signal.

[0070] See also Figure 2,In this embodiment, as one of the implementable methods, a ProfibusDP bus, an input and output module and two controllers are provided in the I / O control cabinet;

[0071] The two controllers are redundant, one is the main controller and the other is the backup controller;

[0072] The two controllers are connected to the input and output modules through the Profibus DP bus respectively; the input and output modules are connected to the field actuators;

[0073] Engineer station, used to synchronously download the field control logic and field alarm logic to the active controller and standby controller;

[0074] The operator station is used to synchronously send the on-site human-machine interaction signals to the main controller and the standby controller; receive the on-site alarm signals and on-site operation signals sent by the main controller; and display the on-site alarm signals and on-site operation signals sent by the main controller on the on-site human-machine interaction screen;

[0075] The field actuator is used to collect the field operation signal and send it to the input and output module; receive the field control signal sent by the input and output module, and adjust the field operation signal according to the field control signal;

[0076] Input and output module, used to receive the field operation signal sent by the field actuator, and send the field operation signal to the main controller and the standby controller synchronously; receive the field control signal sent by the main controller and send it to the field actuator;

[0077] The main controller is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal and send it to the input and output module; receive the on-site operation signal sent by the on-site actuator; perform on-site alarm logic operation on the on-site operation signal to generate a on-site alarm signal; and send the on-site operation signal and the on-site alarm signal to the operator station;

[0078] The standby controller is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal; receive the on-site operation signal sent by the on-site actuator; perform on-site alarm logic operation on the on-site operation signal to generate a on-site alarm signal;

[0079] The main controller and the standby controller synchronously receive the on-site human-machine interaction signals sent by the operator station, synchronously perform on-site control logic operations on the on-site human-machine interaction signals, and synchronously generate on-site control signals; synchronously receive the on-site operation signals sent by the on-site actuators, synchronously perform on-site alarm logic operations on the on-site operation signals, and synchronously generate on-site alarm signals.

[0080] The operation cycle of the controller is the time it takes for the controller to complete the following operations: receiving the on-site human-machine interaction signal sent by the operator station; performing on-site control logic operations on the on-site human-machine interaction signal to generate a on-site control signal; receiving the on-site operation signal sent by the on-site actuator; performing on-site alarm logic operations on the on-site operation signal to generate a on-site alarm signal.

[0081] In this embodiment, as one of the achievable methods, the active controller and the standby controller exchange synchronization signals and handshake signals in each operation cycle to ensure that the active controller and the standby controller are both ready for data exchange;

[0082] The standby controller follows the main controller through the synchronization signal. When the main controller freezes or fails, the main controller and the standby controller can be switched without any impact on the system if the standby controller is working normally.

[0083] In this embodiment, as one of the achievable methods, both the main controller and the standby controller are provided with a watchdog circuit and a fault self-checking circuit;

[0084] When the main controller crashes, the watchdog circuit of the main controller is activated, and the standby controller is switched to the main controller, and the main controller is switched to the standby controller;

[0085] When the main controller fails, the fault self-detection circuit of the main controller is activated, and the standby controller is switched to the main controller, and the main controller is switched to the standby controller;

[0086] Active controller failures include hardware failures and software failures.

[0087] In this embodiment, as one of the achievable methods, the on-site human-computer interaction includes setting an analog quantity signal and a switch quantity signal, and the on-site human-computer interaction signal includes an analog quantity setting signal and a switch quantity setting signal;

[0088] The field control signal and the field operation signal both include analog quantity signal and switch quantity signal;

[0089] Analog signals include liquid level signals, pressure signals, temperature signals and valve position opening signals, and switch signals include pump standby signals and valve interlock signals;

[0090] The analog setting signal includes a liquid level setting signal, a pressure setting signal, a temperature setting signal and a valve position opening setting signal;

[0091] The switch quantity setting signal includes the pump standby setting signal and the valve interlock switching setting signal.

[0092] See also Figure 4In this embodiment, as one of the achievable methods, the on-site human-computer interaction screen includes an on-site process flow chart; the on-site operation signal, the on-site human-computer interaction signal and the on-site alarm signal are displayed in the on-site process flow chart;

[0093] In the on-site process flow chart, a standby button is set for mutually redundant pumps. Turning on the standby button of a pump indicates that the pump is put into standby mode, and turning off the standby button of a pump indicates that the pump is put into primary mode. A confirmation prompt is given for turning on or off the standby button of the pump. After confirming that the standby button of the pump is turned on or off, a standby setting signal for the pump is generated. An interlock cut-off button is set for an interlocked valve. Turning on the interlock cut-off button of a valve indicates that the valve cuts off the interlock, and turning off the interlock cut-off button of a valve indicates that the valve is interlocked. A confirmation prompt is given for turning on or off the interlock cut-off button of a valve. After confirming that the interlock cut-off button of a valve is turned on or off, a valve interlock setting signal for the valve is generated.

[0094] Performing on-site control logic operation on the pump's standby setting signal, and generating the pump's standby signal according to the pump's standby setting signal;

[0095] A field control logic operation is performed on the valve interlock cut-off setting signal, and a valve interlock signal is generated according to the valve interlock cut-off setting signal.

[0096] In this embodiment, as one of the achievable methods, the on-site alarm signal includes an analog high limit alarm signal and an analog low limit alarm signal;

[0097] Performing on-site alarm logic operation on on-site operation signals to generate on-site alarm signals includes the following steps:

[0098] When the analog signal is lower than the set lower limit, an analog signal lower limit alarm signal is generated;

[0099] When the analog signal is higher than the set high limit, an analog signal high limit alarm signal is generated.

[0100] In this embodiment, as one of the feasible methods, the engineer station installs the engineering master control software, which integrates logic configuration, screen configuration, compilation and downloading functions; the operator station installs the operator online monitoring software, and the on-site human-computer interaction screen runs in the operator online monitoring software.

[0101] The operator's online monitoring software runs the on-site human-computer interaction screen for the operator to monitor and control the on-site operation, making it convenient for the operator to understand the on-site operation signals and on-site alarm signals at any time, and to conduct human-computer interaction in the on-site human-computer interaction screen in time to ensure the safe and stable operation of the on-site equipment.

[0102] In this embodiment, as one of the achievable ways, the field control layer also includes a history station;

[0103] The operator station is also used to send on-site alarm signals, on-site operation signals and on-site human-machine interaction signals to the history station;

[0104] The history station is used to receive the on-site alarm signals, on-site operation signals and on-site human-computer interaction signals sent by the operator station; store, maintain and query the on-site operation signals, on-site alarm signals and on-site human-computer interaction signals.

[0105] See also Figure 3 ,In this embodiment, as one of the implementable methods, the field control layer also includes a communication station;

[0106] The communication station is installed with communication application software, and the communication interface module is installed for the nuclear power unit that supplies heat to the nuclear energy steam supply station. The communication application software of the communication station communicates with the communication interface module of the nuclear power unit based on the data exchange method of the Modbus TCP protocol;

[0107] A switch quantity communication point and an analog quantity communication point are configured between the nuclear energy steam supply station and the nuclear power unit; the communication station collects the values ​​of the switch quantity communication point and the analog quantity communication point in real time;

[0108] The communication interface module of the nuclear power unit sends a signal request to the communication application software of the communication station according to the set frequency;

[0109] The communication application software of the communication station receives the signal request sent by the communication interface module of the nuclear power unit, and sends the signal requested by the communication interface module of the nuclear power unit to the communication interface module of the nuclear power unit;

[0110] The communication interface module of the nuclear power unit receives the signal sent by the communication application software of the communication station and organizes and introduces it into the DCS screen of the nuclear power unit;

[0111] The signal request sent by the communication interface module of the nuclear power unit to the communication application software of the communication station is the value of the switch communication point and the analog communication point.

[0112] In this embodiment, as one of the feasible ways, the nuclear energy steam supply station is jointly heated by two nuclear power units, the communication interface module of each nuclear power unit is connected to the communication station through optical fiber, photoelectric converters are provided at both ends of the optical fiber, a firewall is provided between the photoelectric converter and the communication station, the communication station and the firewall are connected through twisted pair cables, the firewall and the photoelectric converter are connected through twisted pair cables, and the communication interface module of each nuclear power unit is connected to the photoelectric converter through twisted pair cables.

[0113] In this embodiment, as one of the achievable methods, the monitoring and control layer also includes a printer and two ring networks; there are two operation stations, and there are two history stations, one operation station also serving as an engineer station and a history station, and the other operation station also serving as a communication station and another history station;

[0114] The field control layer also includes a network cabinet and two relays, there are four I / O control cabinets, two I / O control cabinets correspond to one relay cabinet, and there are two switches in the network cabinet;

[0115] The printer is connected to one of the ring networks, and each switch is connected to two ring networks respectively; each operation station and each controller are configured with two network cards with two ring network segments, each operation station is connected to two ring networks respectively, and each controller is connected to two ring networks and two switches respectively.

[0116] In this embodiment, as one of the achievable methods, the field control layer further includes a power distribution cabinet; the power distribution cabinet receives two AC power supplies, one AC power supply is used to supply power to the nuclear power plant, and the other is used to supply power to the UPS;

[0117] The power distribution cabinet is equipped with a 220V AC power switching module. The power distribution cabinet will receive two AC power supplies through the 220V AC power switching module for redundant switching, and provide working power for the I / O control cabinet, relay cabinet, network cabinet, operation console and printer respectively;

[0118] A DC power conversion module is installed in the I / O control cabinet. The I / O control cabinet receives the 220V AC power provided by the power distribution cabinet, converts the 220V AC power into a (24-48)V DC power through the DC power conversion module, and provides working power for the input and output modules in the I / O control cabinet.

[0119] The nuclear energy steam supply control system of this embodiment has an on-site human-machine interaction screen that displays on-site operation signals and on-site alarm signals. The operator performs on-site human-machine interaction on the on-site human-machine interaction screen, which is convenient for the operator to monitor and control on-site operation; the high redundancy design means that a single failure does not affect the system operation; the main controller and the backup controller operate simultaneously, and the main controller outputs the operation results, ensuring worry-free switching between the main controller and the backup controller.

[0120] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A nuclear energy steam supply control system, characterized in that: Used by operators to monitor and control on-site operations of nuclear power steam supply stations, including: The monitoring control layer is used for the operator to perform on-site human-machine interaction on the on-site human-machine interaction screen, generate on-site human-machine interaction signals and send them to the on-site control layer; receive on-site operation signals and on-site alarm signals sent by the on-site control layer; and display on-site operation signals, on-site alarm signals and on-site human-machine interaction signals on the on-site human-machine interaction screen; The field control layer is used to collect field operation signals from the field actuators; perform field alarm logic operations on the field operation signals to generate field alarm signals; send the field operation signals and field alarm signals to the monitoring control layer; receive the field human-machine interaction signals sent by the monitoring control layer; perform field control logic operations on the field human-machine interaction signals to generate field control signals and send them to the field actuators; The field actuator is used to receive the field control signal sent by the field control layer and adjust the field operation signal according to the field control signal.

2. The nuclear energy steam supply control system according to claim 1, characterized in that: The field control layer includes the I / O control cabinet; the monitoring control layer includes the engineer station and the operator station; Engineer station, used for configuring and compiling on-site human-computer interaction screens to generate on-site human-computer interaction screens; Configure and compile field control logic to generate field control logic; Configure and compile field alarm logic to generate field alarm logic; Download the field control logic and field alarm logic to the I / O control cabinet, and download the field human-machine interaction screen to the operator station; Operator station, used to run the on-site human-computer interaction screen; The operator conducts on-site human-machine interaction on the on-site human-machine interaction screen, generates on-site human-machine interaction signals and sends them to the I / O control cabinet; receives on-site alarm signals and on-site operation signals sent by the I / O control cabinet; displays on-site alarm signals, on-site operation signals and on-site human-machine interaction signals on the on-site human-machine interaction screen; I / O control cabinet, used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal, generate on-site control signal and send it to the on-site actuator; Collect on-site operation signals from on-site actuators; Perform on-site alarm logic operations on on-site operation signals to generate on-site alarm signals; Sending on-site operation signals and on-site alarm signals to the operator station; The field actuator is used to receive the field control signal sent by the I / O control cabinet and adjust the field operation signal according to the field control signal.

3. The nuclear energy steam supply control system according to claim 2, characterized in that: The I / O control cabinet is equipped with Profibus DP bus, input and output modules and two controllers; the two controllers are redundant, one controller is the main controller and the other is the backup controller; the two controllers are connected to the input and output modules through the Profibus DP bus respectively; the input and output modules are connected to the field actuators; Engineer station, used to synchronously download the field control logic and field alarm logic to the active controller and standby controller; The operator station is used to synchronously send the on-site human-machine interaction signals to the main controller and the standby controller; receive the on-site alarm signals and on-site operation signals sent by the main controller; and display the on-site alarm signals and on-site operation signals sent by the main controller on the on-site human-machine interaction screen; Field actuator, used to collect field operation signals and send them to input and output modules; Receive the field control signal sent by the input and output module, and adjust the field operation signal according to the field control signal; An input / output module is used to receive a field operation signal sent by a field actuator and synchronously send the field operation signal to a main controller and a standby controller; Receive the field control signal sent by the main controller and send it to the field actuator; The main controller is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operations on the on-site human-machine interaction signal, and generate on-site control signals to send to the input and output modules; Receive the field operation signal sent by the field actuator; Perform field alarm logic operations on field operation signals to generate field alarm signals; send field operation signals and field alarm signals to the operator station; The standby controller is used to receive the on-site human-machine interaction signal sent by the operator station; perform on-site control logic operation on the on-site human-machine interaction signal to generate a on-site control signal; Receive the field operation signal sent by the field actuator; Perform on-site alarm logic operations on on-site operation signals to generate on-site alarm signals; The main controller and the standby controller synchronously receive the on-site human-machine interaction signal sent by the operator station, synchronously perform on-site control logic operations on the on-site human-machine interaction signal, and synchronously generate on-site control signals; Synchronously receive the field operation signal sent by the field actuator, synchronously perform field alarm logic operation on the field operation signal, and synchronously generate the field alarm signal.

4. The nuclear energy steam supply control system according to claim 3, characterized in that: The active controller and the standby controller exchange synchronization signals and handshake signals in each operation cycle to ensure that both the active controller and the standby controller are ready for data exchange; The standby controller follows the main controller through the synchronization signal. When the main controller freezes or fails, the main controller and the standby controller can be switched without any worries.

5. The nuclear energy steam supply control system according to claim 4, characterized in that: Both the main controller and the standby controller are equipped with a watchdog circuit and a fault self-check circuit; When the main controller crashes, the watchdog circuit of the main controller is activated, and the standby controller is switched to the main controller, and the main controller is switched to the standby controller; When the main controller fails, the fault self-detection circuit of the main controller is activated to switch the standby controller to the main controller, and the main controller is switched to the standby controller.

6. The nuclear energy steam supply control system according to claim 1, characterized in that: On-site human-machine interaction includes setting analog quantity signals and switch quantity signals, and on-site human-machine interaction signals include analog quantity setting signals and switch quantity setting signals; The field control signal and the field operation signal both include analog quantity signal and switch quantity signal; Analog signals include liquid level signals, pressure signals, temperature signals and valve position opening signals, and switch signals include pump standby signals and valve interlock signals; The analog setting signal includes a liquid level setting signal, a pressure setting signal, a temperature setting signal and a valve position opening setting signal; The switch quantity setting signal includes the pump standby setting signal and the valve interlock switching setting signal.

7. The nuclear energy steam supply control system according to claim 6, characterized in that: The on-site human-machine interaction screen includes an on-site process flow chart, which displays on-site operation signals, on-site human-machine interaction signals and on-site alarm signals; In the on-site process flow chart, a standby button is set for mutually redundant pumps, and an interlock cut-off button is set for interlocked valves; by opening or closing the standby button of the pump and confirming it, a pump standby setting signal is generated; by opening or closing the interlock cut-off button of the valve and confirming it, a valve interlock switch setting signal is generated; Performing on-site control logic operation on the pump's standby setting signal, and generating the pump's standby signal according to the pump's standby setting signal; A field control logic operation is performed on the valve interlock cut-off setting signal, and a valve interlock signal is generated according to the valve interlock cut-off setting signal.

8. The nuclear energy steam supply control system according to claim 6, characterized in that: On-site alarm signals include analog high limit alarm signal and analog low limit alarm signal; Performing on-site alarm logic operation on on-site operation signals to generate on-site alarm signals includes the following steps: When the analog signal is lower than the set lower limit, an analog signal lower limit alarm signal is generated; When the analog signal is higher than the set high limit, an analog signal high limit alarm signal is generated.

9. The nuclear energy steam supply control system according to claim 3, characterized in that: The field control layer also includes the historical station; The operator station is also used to send on-site alarm signals, on-site operation signals and on-site human-machine interaction signals to the history station; The history station is used to receive the on-site alarm signals, on-site operation signals and on-site human-computer interaction signals sent by the operator station; store, maintain and query the on-site operation signals, on-site alarm signals and on-site human-computer interaction signals.

10. The nuclear energy steam supply control system according to claim 9, characterized in that: The field control layer also includes a communication station; a switch communication point and an analog communication point are configured between the nuclear energy steam supply station and the nuclear power unit; the communication station collects the values ​​of the switch communication point and the analog communication point in real time; The nuclear power unit sends a signal request to the communication station at a set frequency; the communication station receives the signal request sent by the nuclear power unit and sends the signal requested by the nuclear power unit to the nuclear power unit; The nuclear power unit receives the signal sent by the communication station and organizes and imports the DCS screen of the nuclear power unit; The signal request of the nuclear power unit is the value of the switch communication point and the analog communication point.

11. The nuclear energy steam supply control system according to claim 10, characterized in that: The monitoring and control layer also includes a printer and two ring networks; there are two operation stations and two history stations, one operation station also serves as an engineer station and a history station, and the other operation station also serves as a communication station and another history station; The field control layer also includes a network cabinet and two relays, there are four I / O control cabinets, two I / O control cabinets correspond to one relay cabinet, and there are two switches in the network cabinet; The printer is connected to one of the ring networks, and each switch is connected to two ring networks respectively; each operation station and each controller are configured with two network cards with two ring network segments, each operation station is connected to two ring networks respectively, and each controller is connected to two ring networks and two switches respectively.

12. The nuclear energy steam supply control system according to claim 11, characterized in that: The field control layer also includes a power distribution cabinet; the power distribution cabinet receives two AC power supplies; The power distribution cabinet is equipped with an AC power switching module. The power distribution cabinet will receive two AC power supplies through the AC power switching module for redundant switching, and provide working power for the I / O control cabinet, relay cabinet, network cabinet, operation console and printer respectively; A DC power conversion module is provided in the I / O control cabinet. The I / O control cabinet receives the AC power provided by the power distribution cabinet, converts the AC power into DC power through the DC power conversion module, and provides working power for the input and output modules in the I / O control cabinet.

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