Control method of sodium-cooled fast reactor starting feed pump outlet pneumatic control valve

Abstract

The invention particularly relates to a method for controlling a pneumatic control valve at a starting feed pump outlet of a sodium-cooled fast reactor. The method comprises the following steps that an operator selects a control mode of the pneumatic control valve at the starting feed pump outlet according to the running state of a sodium-cooled fast reactor unit; executing the control mode of starting the feed pump outlet pneumatic control valve selected by the operator; the control modes for starting the pneumatic control valve at the outlet of the feed pump comprise a pressure control mode and a temperature control mode. The invention further relates to a sodium-cooled fast reactor starting feed pump outlet pneumatic control valve control device, computer equipment and a storage medium. According to the invention, when the starting feed pump is switched to the main feed pump, the pneumatic control valve at the outlet of the starting feed pump can quickly respond to the feed water pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of control of a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump, and in particular to a control method, device, computer equipment and computer-readable storage medium for a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump. Background Art

[0002] The three-circuit of the sodium-cooled fast reactor includes the main feedwater header, the main feedwater pump, the starting feedwater pump and the evaporator; the evaporator is composed of multiple evaporator modules; the main feedwater header is connected to the main feedwater pump inlet and the starting feedwater pump inlet pipelines respectively, and the main feedwater pump outlet and the starting feedwater pump outlet are connected to the pipelines of each evaporator module respectively; the starting feedwater pump outlet is equipped with a pneumatic regulating valve; the main feedwater header is equipped with a safety valve, which will trip when the pressure in the main feedwater header exceeds the set value of the safety valve. During the water inflow process of the evaporator, the starting feedwater pump first supplies water from the main feedwater header, and then the main feedwater pump supplies water from the main feedwater header.

[0003] The existing control mode of the pneumatic regulating valve at the outlet of the starting water supply pump is a temperature control mode. In the temperature control mode of the pneumatic regulating valve at the outlet of the starting water supply pump, the opening of the pneumatic regulating valve at the outlet of the starting water supply pump is adjusted according to the difference between the measured value of the sodium temperature at the outlet of the evaporator and the set value of the sodium temperature at the outlet of the evaporator to maintain the sodium temperature at the outlet of the evaporator at the set value. In the temperature control mode of the pneumatic regulating valve at the outlet of the starting water supply pump, due to the residual heat of the starting water supply pump, the pneumatic regulating valve at the outlet of the starting water supply pump responds slowly to the change of the sodium temperature at the outlet of the evaporator. When the starting water supply pump switches to the main water supply pump, the pneumatic regulating valve at the outlet of the starting water supply pump cannot respond quickly to the fluctuation of the water supply pressure, which easily causes the risk of the safety valve tripping due to the excessive operating pressure of the main water supply manifold. Summary of the invention

[0004] The object of the present invention is to provide a method, device, computer equipment and computer-readable storage medium for controlling a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump, and to provide two options of a temperature control mode and a pressure control mode for a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump. When the startup feedwater pump is switched to the main feedwater pump, the operator can select the pressure control mode for the pneumatic regulating valve at the outlet of the startup feedwater pump to ensure that the pneumatic regulating valve at the outlet of the startup feedwater pump responds quickly to the feedwater pressure, effectively controls the feedwater flow rate and the pressure of the main feedwater header, maintains the sodium temperature at the outlet of the evaporator without large fluctuations, and avoids the risk of the safety valve tripping due to excessive pressure in the main feedwater header.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A method for controlling a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump comprises the following steps:

[0007] The operator selects the temperature control mode or the pressure control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump according to the operating status of the sodium-cooled fast reactor unit;

[0008] Execute the control mode of the pneumatic regulating valve at the outlet of the start-up water pump selected by the operator;

[0009] In the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is adjusted according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header to maintain the pressure of the main water supply header at the set value;

[0010] In the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is adjusted according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet to maintain the sodium temperature at the evaporator outlet at the set value.

[0011] As one of the achievable methods, starting the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump includes the following steps:

[0012] According to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated;

[0013] Converting the valve opening digital signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening analog signal;

[0014] Converting the valve opening analog signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump;

[0015] The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the pressure control mode of the start-up feed water pump outlet pneumatic regulating valve.

[0016] As one of the achievable methods, according to the difference between the main water supply header pressure measurement value and the main water supply header pressure setting value, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated, including the following steps:

[0017] Set the main water supply header pressure setting value;

[0018] Track the measured value of the main water supply header pressure, and calculate the difference between the measured value of the main water supply header pressure and the set value of the main water supply header pressure;

[0019] According to the difference between the measured pressure value of the main water supply manifold and the set pressure value of the main water supply manifold, the opening of the pneumatic regulating valve at the outlet of the starting water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the starting water supply pump is generated.

[0020] As one of the achievable methods, starting the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump includes the following steps:

[0021] According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up feedwater pump is calculated, and a valve opening digital signal under the temperature control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is generated;

[0022] Converting the valve opening digital signal of the pneumatic regulating valve at the outlet of the start-up water pump in the temperature control mode into a valve opening analog signal;

[0023] Converting the valve opening analog signal of the pneumatic regulating valve at the outlet of the start-up water pump in the temperature control mode into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump;

[0024] The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the start-up feed water pump outlet pneumatic regulating valve temperature control mode.

[0025] As one of the achievable methods, according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is calculated, and a valve opening digital signal in the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump is generated, including the following steps:

[0026] Set the evaporator outlet sodium temperature setpoint;

[0027] Obtain the measured value of the sodium temperature at the evaporator outlet, and calculate the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet;

[0028] According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated.

[0029] As one of the achievable methods, the evaporator is composed of multiple evaporator modules, the main feed water header is respectively connected to the main feed water pump inlet and the start-up feed water pump inlet pipeline, the main feed water pump outlet and the start-up feed water pump outlet are respectively connected to the pipelines of each evaporator module, the start-up feed water pump outlet is provided with a pneumatic regulating valve, and the main feed water header is provided with a safety valve;

[0030] The evaporator outlet sodium temperature setting value is the average value of multiple evaporator module outlet sodium temperature setting values; the evaporator outlet sodium temperature measurement value is the average value of multiple evaporator module outlet sodium temperature measurement values.

[0031] As one of the feasible ways, the operator selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump according to the operating status of the sodium-cooled fast reactor unit. When the start-up feedwater pump is working normally, the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is selected as the temperature control mode. When the start-up feedwater pump is switched to the main feedwater pump, the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is selected as the pressure control mode.

[0032] As one of the feasible ways, when the control mode of the pneumatic regulating valve at the outlet of the water supply pump is selected as the temperature control mode, the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump is executed, and the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump is locked, and only the measured value of the pressure of the main water supply header and the set value of the pressure of the main water supply header are tracked and displayed;

[0033] When the control mode of the pneumatic regulating valve at the outlet of the water pump is selected to be the pressure control mode, the pressure control mode of the pneumatic regulating valve at the outlet of the water pump is executed, and the temperature control mode of the pneumatic regulating valve at the outlet of the water pump is locked, and only the actual measured value of the evaporator outlet sodium temperature and the set value of the evaporator outlet sodium temperature are tracked and displayed.

[0034] As one of the achievable ways, the control mode of starting the pneumatic regulating valve at the outlet of the water supply pump also includes a manual control mode;

[0035] When the control mode of the pneumatic regulating valve at the outlet of the start-up water pump is the pressure control mode or the manual control mode, the set value of the sodium temperature at the outlet of the evaporator tracks the measured value of the sodium temperature at the outlet of the evaporator;

[0036] When the control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is the temperature control mode or the manual control mode, the main water supply header pressure setting value tracks the main water supply header pressure measurement value.

[0037] The present invention also provides a sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control device, comprising:

[0038] A control mode switching module is used for the operator to select the control mode of the pneumatic regulating valve at the outlet of the start-up water pump as the temperature control mode or the pressure control mode according to the operating status of the sodium-cooled fast reactor unit;

[0039] A control mode execution module is used to execute the control mode of starting the pneumatic regulating valve at the outlet of the feedwater pump selected by the operator;

[0040] In the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump, the control mode execution module adjusts the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header to maintain the pressure of the main water supply header at the set value;

[0041] In the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the control mode execution module adjusts the opening of the pneumatic regulating valve at the outlet of the start-up water pump according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet to maintain the sodium temperature at the evaporator outlet at the set value.

[0042] The present invention also provides a computer device, comprising a memory and a processor, wherein the memory stores computer-readable instructions, and when the processor executes the computer-readable instructions, the steps of the above-mentioned sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control method are implemented.

[0043] The present invention also provides a computer-readable storage medium, on which computer-readable instructions are stored. When the computer-readable instructions are executed, the steps of the above-mentioned sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control method are implemented.

[0044] Beneficial technical effects of the present invention:

[0045] The sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control method, device, computer equipment and computer-readable storage medium of the present invention provide two options of temperature control mode and pressure control mode for the sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control mode. When the startup feedwater pump is switched to the main feedwater pump, the operator can select the startup feedwater pump outlet pneumatic regulating valve control mode as the pressure control mode, thereby ensuring that the startup feedwater pump outlet pneumatic regulating valve responds quickly to the feedwater pressure, effectively controlling the feedwater flow rate and the main feedwater header pressure, maintaining the evaporator outlet sodium temperature without large fluctuations, and avoiding the risk of the safety valve tripping due to excessive pressure in the main feedwater header. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A flow chart of an embodiment of a method for controlling a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump according to the present invention;

[0047] Figure 2 The present invention is a schematic structural view of an embodiment of a pneumatic regulating valve control device for a sodium-cooled fast reactor startup feedwater pump outlet according to the present invention.

[0048] Figure 3 The figure is a schematic structural view of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0052] See also Figure 1 This embodiment provides a method for controlling a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump, comprising the following steps:

[0053] The operator selects the temperature control mode or the pressure control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump according to the operating status of the sodium-cooled fast reactor unit;

[0054] Execute the control mode of the pneumatic regulating valve at the outlet of the start-up water pump selected by the operator;

[0055] In the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is adjusted according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header to maintain the pressure of the main water supply header at the set value;

[0056] In the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is adjusted according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet to maintain the sodium temperature at the evaporator outlet at the set value.

[0057] In this embodiment, as one of the achievable methods, starting the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump includes the following steps:

[0058] According to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated;

[0059] Converting the valve opening digital signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening analog signal;

[0060] Converting the valve opening analog signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump;

[0061] The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the pressure control mode of the start-up feed water pump outlet pneumatic regulating valve.

[0062] In this embodiment, as one of the achievable methods, according to the difference between the main water supply header pressure measurement value and the main water supply header pressure setting value, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and the valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated, including the following steps:

[0063] Set the main water supply header pressure setting value;

[0064] Track the measured value of the main water supply header pressure, and calculate the difference between the measured value of the main water supply header pressure and the set value of the main water supply header pressure;

[0065] According to the difference between the measured pressure value of the main water supply manifold and the set pressure value of the main water supply manifold, the opening of the pneumatic regulating valve at the outlet of the starting water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the starting water supply pump is generated.

[0066] In this embodiment, as one of the achievable methods, starting the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump includes the following steps:

[0067] According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up feedwater pump is calculated, and a valve opening digital signal under the temperature control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is generated;

[0068] Converting the valve opening digital signal of the pneumatic regulating valve at the outlet of the start-up water pump in the temperature control mode into a valve opening analog signal;

[0069] Converting the valve opening analog signal of the pneumatic regulating valve at the outlet of the start-up water pump in the temperature control mode into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump;

[0070] The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the start-up feed water pump outlet pneumatic regulating valve temperature control mode.

[0071] In this embodiment, as one of the achievable methods, according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is calculated, and a valve opening digital signal in the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump is generated, including the following steps:

[0072] Set the evaporator outlet sodium temperature setpoint;

[0073] Obtain the measured value of the sodium temperature at the evaporator outlet, and calculate the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet;

[0074] According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated.

[0075] In this embodiment, as one of the achievable methods, the evaporator is composed of a plurality of evaporator modules, the main feed water header is respectively connected to the main feed water pump inlet and the start-up feed water pump inlet pipeline, the main feed water pump outlet and the start-up feed water pump outlet are respectively connected to the pipelines of each evaporator module, the start-up feed water pump outlet is provided with a pneumatic regulating valve, and the main feed water header is provided with a safety valve;

[0076] The evaporator outlet sodium temperature setting value is the average value of multiple evaporator module outlet sodium temperature setting values; the evaporator outlet sodium temperature measurement value is the average value of multiple evaporator module outlet sodium temperature measurement values.

[0077] In the present embodiment, as one of the feasible ways, the operator selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump according to the operating status of the sodium-cooled fast reactor unit, selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump as the temperature control mode when the start-up feedwater pump is working normally, and selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump as the pressure control mode when the start-up feedwater pump is switched to the main feedwater pump.

[0078] In this embodiment, as one of the achievable methods, when the control mode of the pneumatic regulating valve at the outlet of the water supply pump is selected as the temperature control mode, the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump is executed, and the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump is locked, and only the measured value of the pressure of the main water supply header and the set value of the pressure of the main water supply header are tracked and displayed;

[0079] When the control mode of the pneumatic regulating valve at the outlet of the water pump is selected to be the pressure control mode, the pressure control mode of the pneumatic regulating valve at the outlet of the water pump is executed, and the temperature control mode of the pneumatic regulating valve at the outlet of the water pump is locked, and only the actual measured value of the evaporator outlet sodium temperature and the set value of the evaporator outlet sodium temperature are tracked and displayed.

[0080] In this embodiment, as one of the achievable ways, the control mode of starting the pneumatic regulating valve at the outlet of the water supply pump also includes a manual control mode;

[0081] When the control mode of the pneumatic regulating valve at the outlet of the start-up water pump is the pressure control mode or the manual control mode, the set value of the sodium temperature at the outlet of the evaporator tracks the measured value of the sodium temperature at the outlet of the evaporator to ensure that there is no disturbance when the control mode of the pneumatic regulating valve at the outlet of the start-up water pump is switched;

[0082] When the control mode of the pneumatic regulating valve at the outlet of the starting water pump is the temperature control mode or the manual control mode, the main water supply manifold pressure setting value tracks the main water supply manifold pressure measurement value to ensure that there is no disturbance when the control mode of the pneumatic regulating valve at the outlet of the starting water pump is switched.

[0083] In this embodiment, as one of the achievable ways, the method for controlling the pneumatic regulating valve at the outlet of the sodium-cooled fast reactor startup feedwater pump further includes:

[0084] The operator controls and monitors the input signals of the first PID operation module and the second PID operation module.

[0085] Under the pressure control mode of the pneumatic regulating valve at the outlet of the starting water pump, the pneumatic regulating valve at the outlet of the starting water pump can respond quickly to changes in the water supply pressure, adjust the valve opening, and maintain the pressure of the main water supply manifold stable. This not only allows the pneumatic regulating valve at the outlet of the starting water pump to respond and regulate quickly to the operating conditions, but also allows the operator to have greater room for operability of the unit.

[0086] It should be understood that the multiple sub-steps or multiple stages in each process step do not necessarily have to be executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternating with other steps or at least part of the sub-steps or stages of other steps.

[0087] refer to Figure 2 As an implementation of the above method, the present invention provides an embodiment of a sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control device. The device embodiment corresponds to the embodiment of the above method, and the device can be specifically applied to various electronic devices.

[0088] The sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control device described in this embodiment includes:

[0089] A control mode switching module is used for the operator to select the control mode of the pneumatic regulating valve at the outlet of the start-up water pump as the temperature control mode or the pressure control mode according to the operating status of the sodium-cooled fast reactor unit;

[0090] A control mode execution module is used to execute the control mode of starting the pneumatic regulating valve at the outlet of the feedwater pump selected by the operator;

[0091] In the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump, the control mode execution module adjusts the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header to maintain the pressure of the main water supply header at the set value;

[0092] In the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the control mode execution module adjusts the opening of the pneumatic regulating valve at the outlet of the start-up water pump according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet to maintain the sodium temperature at the evaporator outlet at the set value.

[0093] In this embodiment, as one of the implementable ways, the control mode execution module includes:

[0094] The first PID operation module is used to calculate the opening of the pneumatic regulating valve at the outlet of the starting water supply pump according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header when the operator selects the control mode of the pneumatic regulating valve at the outlet of the starting water supply pump as the pressure control mode, generate a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the starting water supply pump and send it to the digital-to-analog conversion module;

[0095] A digital-to-analog conversion module is used to convert the valve opening digital signal in the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump into a valve opening analog signal and send it to the electrical conversion module;

[0096] An electrical conversion module, used for converting the valve opening analog signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump;

[0097] The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the pressure control mode of the start-up feed water pump outlet pneumatic regulating valve.

[0098] In this embodiment, as one possible implementation, the control mode execution module further includes:

[0099] The first set value station is used to track the measured value of the main water supply manifold pressure, set the main water supply manifold pressure setting value, and display the measured value of the main water supply manifold pressure and the main water supply manifold pressure setting value; when the operator chooses to start the water supply pump outlet pneumatic regulating valve control mode as the pressure control mode, the measured value of the main water supply manifold pressure and the main water supply manifold pressure setting value are sent to the second PID operation module.

[0100] In this embodiment, as one of the implementable ways, the control mode execution module includes:

[0101] The second PID operation module is used to calculate the opening of the pneumatic control valve at the outlet of the start-up water pump according to the difference between the measured value of the sodium temperature at the outlet of the evaporator and the set value of the sodium temperature at the outlet of the evaporator when the operator selects the control mode of the pneumatic control valve at the outlet of the start-up water pump as the temperature control mode, generate a valve opening digital signal under the temperature control mode of the pneumatic control valve at the outlet of the start-up water pump and send it to the digital-to-analog conversion module;

[0102] The digital-to-analog conversion module is also used to convert the valve opening digital signal in the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump into a valve opening analog signal and send it to the electrical conversion module;

[0103] The electrical conversion module is also used to convert the valve opening analog signal in the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening electrical signal and send it to the pneumatic regulating valve at the outlet of the start-up water pump;

[0104] The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the start-up feed water pump outlet pneumatic regulating valve temperature control mode.

[0105] In this embodiment, as one possible implementation, the control mode execution module further includes:

[0106] The second set value station is used to track the measured values ​​of the sodium temperature at the outlet of each evaporator module, calculate the average value of the measured values ​​of the sodium temperature at the outlet of each evaporator module, and generate the measured value of the sodium temperature at the outlet of the evaporator; calculate the average value of the set values ​​of the sodium temperature at the outlet of each evaporator module, and generate the set value of the sodium temperature at the outlet of the evaporator; display the measured values ​​of the sodium temperature at the outlet of the evaporator and the set value of the sodium temperature at the outlet of the evaporator; when the operator chooses to start the control mode of the pneumatic regulating valve at the outlet of the water supply pump as the temperature control mode, the measured values ​​of the sodium temperature at the outlet of the evaporator and the set value of the sodium temperature at the outlet of the evaporator are sent to the second PID operation module.

[0107] In the present embodiment, as one of the feasible methods, the evaporator is composed of multiple evaporator modules, the main water supply manifold is respectively connected to the main water supply pump inlet and the starting water supply pump inlet pipelines, the main water supply pump outlet and the starting water supply pump outlet are respectively connected to the pipelines of each evaporator module, a pneumatic regulating valve is provided at the starting water supply pump outlet, and a safety valve is provided on the main water supply manifold.

[0108] In the present embodiment, as one of the feasible ways, the operator selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump in the control mode switching module according to the operating status of the sodium-cooled fast reactor unit, selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump as the temperature control mode when the start-up feedwater pump is working normally, and selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump as the pressure control mode when the start-up feedwater pump is switched to the main feedwater pump.

[0109] In this embodiment, as one of the achievable ways, when the operator selects the temperature control mode as the control mode of the pneumatic regulating valve at the outlet of the water supply pump in the control mode switching module, the control mode execution module executes the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump, locks the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump, and only tracks and displays the measured value of the pressure of the main water supply header and the set value of the pressure of the main water supply header;

[0110] When the operator selects the pressure control mode for starting the feed water pump outlet pneumatic regulating valve control mode in the control mode switching module, the control mode execution module executes the pressure control mode for starting the feed water pump outlet pneumatic regulating valve, locks the temperature control mode for starting the feed water pump outlet pneumatic regulating valve, and only tracks and displays the actual value of the evaporator outlet sodium temperature and the set value of the evaporator outlet sodium temperature.

[0111] In this embodiment, as one of the achievable ways, the control mode switching mode is also used for the operator to select the manual control mode for starting the pneumatic regulating valve at the outlet of the feed water pump;

[0112] When the control mode of the pneumatic regulating valve at the outlet of the start-up water pump is the pressure control mode or the manual control mode, the set value of the sodium temperature at the outlet of the evaporator tracks the measured value of the sodium temperature at the outlet of the evaporator to ensure that there is no disturbance when the control mode of the pneumatic regulating valve at the outlet of the start-up water pump is switched;

[0113] When the control mode of the pneumatic regulating valve at the outlet of the starting water pump is the temperature control mode or the manual control mode, the main water supply manifold pressure setting value tracks the main water supply manifold pressure measurement value to ensure that there is no disturbance when the control mode of the pneumatic regulating valve at the outlet of the starting water pump is switched.

[0114] Under the pressure control mode of the pneumatic regulating valve at the outlet of the starting water pump, the pneumatic regulating valve at the outlet of the starting water pump can respond quickly to changes in the water supply pressure, adjust the valve opening, and maintain the pressure of the main water supply manifold stable. This not only allows the pneumatic regulating valve at the outlet of the starting water pump to respond and regulate quickly to the operating conditions, but also allows the operator to have greater room for operability of the unit.

[0115] In this embodiment, as one of the achievable methods, the sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control device also includes:

[0116] The remote control station is used for the operator to control and monitor the input signals of the first PID operation module and the second PID operation module.

[0117] See also Figure 3 As an implementation of the above method, the present invention provides an embodiment of a computer device, and the computer device embodiment corresponds to the embodiment of the above method.

[0118] The computer device described in this embodiment includes a memory, a processor and a network interface that are interconnected and communicated through a system bus. It should be noted that the figure only shows a computer device with a memory, a processor and a network interface, but it should be understood that it is not required to implement all the components shown, and more or fewer components can be implemented instead. Among them, those skilled in the art can understand that the computer device here is a device that can automatically perform numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes but is not limited to a microprocessor, an application-specific integrated circuit, a programmable gate array, a digital processor, an embedded device, etc.

[0119] The computer device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The computer device may interact with a user through a keyboard, a mouse, a remote controller, a touch pad, or a voice control device.

[0120] The memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory, random access memory, static random access memory, read-only memory, electrically erasable programmable read-only memory, programmable read-only memory, magnetic memory, disk, optical disk, etc. In some embodiments, the memory may be an internal storage unit of the computer device, such as a hard disk or memory of the computer device. In other embodiments, the memory may also be an external storage device of the computer device, such as a plug-in hard disk, smart memory card, secure digital card, flash memory card, etc. equipped on the computer device. Of course, the memory may also include both the internal storage unit of the computer device and its external storage device. In this embodiment, the memory is generally used to store the operating system and various application software installed on the computer device, such as the computer-readable instructions of the above-mentioned sodium-cooled fast reactor startup feedwater pump outlet pneumatic control valve control method. In addition, the memory may also be used to temporarily store various types of data that have been output or are to be output.

[0121] In some embodiments, the processor may be a central processing unit, a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is generally used to control the overall operation of the computer device. In this embodiment, the processor is used to run the computer-readable instructions stored in the memory or process data, such as running the computer-readable instructions of the above-mentioned sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control method.

[0122] The network interface may include a wireless network interface or a wired network interface, which is generally used to establish a communication connection between the computer device and other electronic devices.

[0123] As an implementation of the above method, the present invention provides an embodiment of a computer-readable storage medium, and the embodiment of the computer-readable storage medium corresponds to the embodiment of the above method.

[0124] The computer-readable storage medium described in this embodiment stores computer-readable instructions, and the computer-readable instructions can be executed by at least one processor to enable the at least one processor to perform the steps of the above-mentioned sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control method.

[0125] The sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control method, device, computer equipment and computer-readable storage medium of the present embodiment provide two options for the sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control mode: temperature control mode and pressure control mode. The operator can select the startup feedwater pump outlet pneumatic regulating valve control mode as the pressure control mode when switching from the startup feedwater pump to the main feedwater pump, thereby ensuring that the startup feedwater pump outlet pneumatic regulating valve responds quickly to the feedwater pressure, effectively controls the feedwater flow rate and the main feedwater header pressure, maintains the evaporator outlet sodium temperature without large fluctuations, and avoids the risk of the safety valve tripping due to excessive pressure in the main feedwater header.

[0126] 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 method for controlling a pneumatic regulating valve at an outlet of a sodium-cooled fast reactor startup feedwater pump, characterized in that: The steps include: The operator selects the temperature control mode or the pressure control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump according to the operating status of the sodium-cooled fast reactor unit; Execute the control mode of the pneumatic regulating valve at the outlet of the start-up water pump selected by the operator; In the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is adjusted according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header to maintain the pressure of the main water supply header at the set value; In the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the opening of the pneumatic regulating valve at the outlet of the start-up water pump is adjusted according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet to maintain the sodium temperature at the evaporator outlet at the set value.

2. The method for controlling the pneumatic regulating valve at the outlet of the sodium-cooled fast reactor startup feedwater pump according to claim 1, characterized in that: Executing the start-up of the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump includes the following steps: According to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated; Converting the valve opening digital signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening analog signal; Converting the valve opening analog signal in the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water pump into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump; The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the pressure control mode of the start-up feed water pump outlet pneumatic regulating valve.

3. The method for controlling the outlet pneumatic regulating valve of the sodium-cooled fast reactor startup feedwater pump according to claim 2, characterized in that: According to the difference between the main water supply header pressure measurement value and the main water supply header pressure setting value, the opening of the start-up water supply pump outlet pneumatic regulating valve is calculated, and the valve opening digital signal under the start-up water supply pump outlet pneumatic regulating valve pressure control mode is generated, including the following steps: Set the main water supply header pressure setting value; Track the measured value of the main water supply header pressure, and calculate the difference between the measured value of the main water supply header pressure and the set value of the main water supply header pressure; According to the difference between the measured pressure value of the main water supply manifold and the set pressure value of the main water supply manifold, the opening of the pneumatic regulating valve at the outlet of the starting water supply pump is calculated, and a valve opening digital signal under the pressure control mode of the pneumatic regulating valve at the outlet of the starting water supply pump is generated.

4. The method for controlling the pneumatic regulating valve at the outlet of the sodium-cooled fast reactor startup feedwater pump according to claim 1, characterized in that: Executing the start-up of the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump includes the following steps: According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up feedwater pump is calculated, and a valve opening digital signal under the temperature control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is generated; Converting the valve opening digital signal of the pneumatic regulating valve at the outlet of the start-up water pump in the temperature control mode into a valve opening analog signal; Converting the valve opening analog signal of the pneumatic regulating valve at the outlet of the start-up water pump in the temperature control mode into a valve opening electrical signal and sending it to the pneumatic regulating valve at the outlet of the start-up water pump; The start-up feed water pump outlet pneumatic regulating valve adjusts the valve opening according to the valve opening electrical signal under the start-up feed water pump outlet pneumatic regulating valve temperature control mode.

5. The method for controlling the pneumatic regulating valve at the outlet of the sodium-cooled fast reactor startup feedwater pump according to claim 4, characterized in that: According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal in the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated, including the following steps: Set the evaporator outlet sodium temperature setpoint; Obtain the measured value of the sodium temperature at the evaporator outlet, and calculate the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet; According to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet, the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump is calculated, and a valve opening digital signal under the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is generated.

6. The method for controlling the pneumatic regulating valve at the outlet of the sodium-cooled fast reactor startup feedwater pump according to claim 5, characterized in that: The evaporator is composed of multiple evaporator modules. The main feed water header is connected to the main feed water pump inlet and the start-up feed water pump inlet pipelines respectively. The main feed water pump outlet and the start-up feed water pump outlet are connected to the pipelines of each evaporator module respectively. The start-up feed water pump outlet is provided with a pneumatic regulating valve, and the main feed water header is provided with a safety valve. The evaporator outlet sodium temperature setting value is the average value of multiple evaporator module outlet sodium temperature setting values; the evaporator outlet sodium temperature measurement value is the average value of multiple evaporator module outlet sodium temperature measurement values.

7. The method for controlling the outlet pneumatic regulating valve of the sodium-cooled fast reactor startup feedwater pump according to claim 1, characterized in that: The operator selects the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump according to the operating status of the sodium-cooled fast reactor unit. When the start-up feedwater pump is working normally, the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is selected as the temperature control mode. When the start-up feedwater pump is switched to the main feedwater pump, the control mode of the pneumatic regulating valve at the outlet of the start-up feedwater pump is selected as the pressure control mode.

8. The method for controlling the outlet pneumatic regulating valve of the sodium-cooled fast reactor startup feedwater pump according to claim 1, characterized in that: When the control mode of the pneumatic regulating valve at the outlet of the water supply pump is selected as the temperature control mode, the temperature control mode of the pneumatic regulating valve at the outlet of the water supply pump is executed, and the pressure control mode of the pneumatic regulating valve at the outlet of the water supply pump is locked, and only the measured value of the pressure of the main water supply header and the set value of the pressure of the main water supply header are tracked and displayed; When the control mode of the pneumatic regulating valve at the outlet of the water pump is selected to be the pressure control mode, the pressure control mode of the pneumatic regulating valve at the outlet of the water pump is executed, and the temperature control mode of the pneumatic regulating valve at the outlet of the water pump is locked, and only the actual measured value of the evaporator outlet sodium temperature and the set value of the evaporator outlet sodium temperature are tracked and displayed.

9. The method for controlling the outlet pneumatic regulating valve of the sodium-cooled fast reactor startup feedwater pump according to claim 1, characterized in that: The control mode of starting the pneumatic regulating valve at the outlet of the water supply pump also includes a manual control mode; When the control mode of the pneumatic regulating valve at the outlet of the start-up water pump is the pressure control mode or the manual control mode, the set value of the sodium temperature at the outlet of the evaporator tracks the measured value of the sodium temperature at the outlet of the evaporator; When the control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump is the temperature control mode or the manual control mode, the main water supply header pressure setting value tracks the main water supply header pressure measurement value.

10. A sodium-cooled fast reactor startup feedwater pump outlet pneumatic regulating valve control device, characterized in that: include: A control mode switching module is used for the operator to select the control mode of the pneumatic regulating valve at the outlet of the start-up water pump as the temperature control mode or the pressure control mode according to the operating status of the sodium-cooled fast reactor unit; A control mode execution module is used to execute the control mode of starting the pneumatic regulating valve at the outlet of the feedwater pump selected by the operator; In the pressure control mode of the pneumatic regulating valve at the outlet of the start-up water supply pump, the control mode execution module adjusts the opening of the pneumatic regulating valve at the outlet of the start-up water supply pump according to the difference between the measured pressure value of the main water supply header and the set pressure value of the main water supply header to maintain the pressure of the main water supply header at the set value; In the temperature control mode of the pneumatic regulating valve at the outlet of the start-up water pump, the control mode execution module adjusts the opening of the pneumatic regulating valve at the outlet of the start-up water pump according to the difference between the measured value of the sodium temperature at the evaporator outlet and the set value of the sodium temperature at the evaporator outlet to maintain the sodium temperature at the evaporator outlet at the set value.

11. A computer device comprising a memory and a processor, wherein the memory stores computer-readable instructions, characterized in that: When the processor executes the computer-readable instructions, the steps of the method for controlling the outlet pneumatic regulating valve of the sodium-cooled fast reactor startup feedwater pump as described in any one of claims 1 to 9 are implemented.

12. A computer-readable storage medium having computer-readable instructions stored thereon, characterized in that: When the computer-readable instructions are executed, the steps of the method for controlling the outlet pneumatic regulating valve of the sodium-cooled fast reactor startup feedwater pump as described in any one of claims 1 to 9 are implemented.

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