Load shedding logic control method for water feeding pump in nuclear energy steam supply project

Abstract

The invention relates to the technical field of nuclear power steam supply project steam conversion, and discloses a nuclear power steam supply project feed pump load shedding logic control method comprising the following steps: obtaining each feed pump state feedback signal; according to the state feedback signals of all the water feeding pumps, whether the running states of all the water feeding pumps are shut down or run is judged; according to the running state of each water feeding pump, whether the steam conversion system runs in a single water feeding pump mode or not is judged; external supply steam flow is obtained, and a single feed pump operation load shedding signal is generated in combination with the external supply steam flow; according to the operation load shedding signal of the single water feeding pump, the opening degree of the water feeding side adjusting valve and the opening degree of the steam side adjusting valve are correspondingly adjusted, the operation working condition of the single water feeding pump is further judged by judging the operation working condition of the single water feeding pump and superposing the external supply steam flow, and the operation load shedding signal of the single water feeding pump is generated; correspondingly adjusting the opening degrees of the water supply side regulating valve and the steam side regulating valve, balancing the water supply side and the steam side, and maintaining water supply and steam balance.

Description

Technical Field

[0001] The invention relates to the technical field of steam conversion for nuclear power steam supply projects, and in particular to a load shedding logic control method for a feedwater pump for nuclear power steam supply projects. Background Art

[0002] At present, under the background of global energy conservation and emission reduction, new energy industries including nuclear power and nuclear steam supply have ushered in unprecedented development opportunities. Nuclear steam supply, as another active exploration after nuclear power generation and heating, promotes the comprehensive utilization of nuclear energy and is a new quality productivity of nuclear energy development. Nuclear steam supply is to use the steam of nuclear power plants to heat steam conversion equipment to produce industrial steam, which is further used in industrial production activities. Although the nuclear steam supply project has been officially put into operation, there will be more nuclear steam supply projects in the future, and the steam conversion system may be larger. Therefore, the control strategy related to the steam conversion system is still worthy of further study.

[0003] The heating steam source of the steam conversion system is generally drawn from the main steam pipeline or steam extraction pipeline of the conventional island of the nuclear power plant. The steam conversion equipment mainly includes: superheater, evaporator, preheater, etc. Figure 1 As shown, the heating steam source on the steam side passes through each steam conversion device in turn and becomes condensate and then returns to the conventional island condensate system. The industrial feed water on the water supply side passes through each steam conversion device in turn and is finally converted into industrial steam that meets the user's requirements. The water supply side is equipped with a feed water pump to boost the industrial feed water. For example, a steam conversion system is equipped with three feed water pumps. Under normal circumstances, two are in operation and one is in standby. If a feed water pump in operation fails and the standby pump does not start normally, the water supply will decrease rapidly, causing an imbalance between the water supply side and the steam side. Therefore, an effective control method is needed to maintain the balance between the two sides to ensure the stable operation of the steam conversion system. Summary of the invention

[0004] In view of this, the present invention provides a feedwater pump load shedding logic control method for a nuclear energy steam supply project to solve the problem of imbalance between the feedwater side and the steam side caused by a feedwater pump failure.

[0005] In a first aspect, the present invention provides a load shedding logic control method for a feedwater pump in a nuclear energy steam supply project, the method comprising:

[0006] Obtaining status feedback signals of each water supply pump, the water supply pump status feedback signals including a water supply pump operation signal and a water supply pump shutdown signal;

[0007] According to the feedback signal of each water supply pump status, determine whether the operation status of each water supply pump is stopped or running;

[0008] According to the operating status of each feedwater pump, determine whether the steam conversion system is operating with a single feedwater pump;

[0009] Obtain the external steam supply flow rate, and generate a single feedwater pump operation load shedding signal based on the external steam supply flow rate;

[0010] According to the load shedding signal of a single feed water pump, the opening of the feed water side regulating valve and the opening of the steam measuring regulating valve are adjusted accordingly.

[0011] The present invention determines whether the operating condition of a single water feed pump is running or shut down according to the water feed pump status feedback signal, and superimposes the external steam flow to further determine whether the operating condition of the single water feed pump occurs during normal operation, and generates a single water feed pump operation load shedding signal to correspondingly adjust the opening of the water feed side regulating valve and the opening of the steam measuring regulating valve, thereby ensuring the balance between the water feed side and the steam side, and maintaining the balance between water feed and steam.

[0012] In an optional implementation, judging whether the operation state of each water supply pump is stopped or running according to the state feedback signal of each water supply pump includes:

[0013] Perform inversion operation on each water supply pump operation signal;

[0014] The inverted operation results of each water supply pump operation signal are respectively ANDed with each water supply pump shutdown signal, and the operation status of the water supply pump is determined based on the AND operation results, whether it is shutdown or running.

[0015] When judging whether the operating status of a single water supply pump is shut down or running, the present invention not only uses the water supply pump shutdown signal, but also combines the water supply pump operation signal to make a comprehensive judgment, so as to avoid misjudgment caused by relying solely on the water supply pump shutdown signal.

[0016] In an optional implementation, when the number of feedwater pumps is three, determining whether the steam conversion system is operated by a single feedwater pump includes:

[0017] If two of the three feedwater pumps are out of service and one is in service, it is determined that the steam conversion system is operating with a single feedwater pump.

[0018] The present invention determines whether the steam conversion system is in the operating condition of a single water feed pump by taking the fact that two of the three water feed pumps are out of service and one water feed pump is in service as a judgment condition, so as to timely discover abnormal conditions.

[0019] In an optional implementation, generating a single feedwater pump operation load shedding signal in combination with the external steam supply flow includes:

[0020] Determine whether the external steam flow rate is greater than a preset steam flow rate threshold;

[0021] If the external steam supply flow rate is greater than the preset steam flow rate threshold, it is judged that the operation of the single feedwater pump occurs during normal operation, and a single feedwater pump operation load shedding signal is generated.

[0022] The present invention judges the operation of the water feed pump based on the water feed pump status feedback signal, combines the comparison result of the external steam flow rate and the preset steam flow rate threshold, comprehensively judges the operating condition of the water feed pump, and when the external steam flow rate is greater than the preset steam flow rate threshold, further judges that the operation of the single water feed pump occurs during normal operation, generates a single water feed pump operation load shedding signal, and generates a single water feed pump operation load shedding signal during normal operation to avoid adjusting the valve during misjudgment.

[0023] In an optional implementation, according to the load shedding signal of a single feedwater pump, the opening of the feedwater side regulating valve and the opening of the steam side regulating valve are correspondingly adjusted, including:

[0024] When a single feedwater pump load shedding signal is detected, the opening of the feedwater side regulating valve and the steam side regulating valve are adjusted to the preset fixed openings respectively.

[0025] The present invention adjusts the opening of the water supply side regulating valve to a preset fixed opening according to the load shedding signal of a single water supply pump to match the water supply flow rate when the single water supply pump is in operation, and simultaneously adjusts the opening of the steam measuring regulating valve to a preset fixed opening to reduce the heating steam source and maintain the balance between water supply and steam.

[0026] In an optional embodiment, before respectively adjusting the opening of the water supply side regulating valve and the opening of the steam side regulating valve to fixed openings, the method further includes:

[0027] The fixed opening of the water supply side regulating valve and the fixed opening of the steam side regulating valve are set according to the valve characteristic curve.

[0028] The present invention sets the fixed opening of the water supply side regulating valve and the fixed opening of the steam measuring regulating valve according to the valve characteristic curve to determine the valve opening matching the valve characteristic curve under actual working conditions and provide data support for valve adjustment.

[0029] In an optional embodiment, the method further includes:

[0030] Obtain the debugging data, and verify and correct the fixed opening of the water supply side control valve and the fixed opening of the steam test control valve based on the debugging data.

[0031] The present invention verifies and corrects the fixed opening of the water supply side regulating valve and the fixed opening of the steam measuring regulating valve according to the debugging data, so that the set fixed opening of the valve is more in line with the actual working condition.

[0032] In a second aspect, the present invention provides a feedwater pump load shedding logic control device for a nuclear energy steam supply project, the device comprising:

[0033] An acquisition module is used to acquire status feedback signals of each water supply pump, wherein the status feedback signals of the water supply pump include a water supply pump operation signal and a water supply pump shutdown signal;

[0034] The first judgment module is used to judge whether the operation status of each water supply pump is stopped or running according to the state feedback signal of each water supply pump;

[0035] The second judgment module is used to judge whether the steam conversion system is operated by a single feedwater pump according to the operating status of each feedwater pump;

[0036] A signal generation module is used to obtain the external steam supply flow rate and generate a load shedding signal for a single feedwater pump in combination with the external steam supply flow rate;

[0037] The adjustment module is used to adjust the opening of the water supply side regulating valve and the opening of the steam measuring regulating valve accordingly according to the load shedding signal of a single water supply pump.

[0038] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the above-mentioned first aspect or any corresponding embodiment thereof to execute the feedwater pump load shedding logic control method for a nuclear energy steam supply project by executing the computer instructions.

[0039] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for logical control of load shedding of a feedwater pump for a nuclear steam supply project according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 is a schematic diagram of a steam conversion system;

[0042] Figure 2 It is a flow chart of a load shedding logic control method for a feedwater pump in a nuclear energy steam supply project according to an embodiment of the present invention;

[0043] Figure 3is a logic diagram of a water supply pump load shedding signal according to an embodiment of the present invention;

[0044] Figure 4 is a logic diagram of water supply side regulating valve control according to an embodiment of the present invention;

[0045] Figure 5 is a logic diagram of steam side regulating valve control according to an embodiment of the present invention;

[0046] Figure 6 is a structural block diagram of a load shedding logic control device for a feedwater pump in a nuclear energy steam supply project according to an embodiment of the present invention;

[0047] Figure 7 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0049] According to an embodiment of the present invention, an embodiment of a method for logical control of feedwater pump load shedding for a nuclear steam supply project is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0050] In this embodiment, a load shedding logic control method for a feedwater pump in a nuclear energy steam supply project is provided. Figure 2 is a flow chart of a load shedding logic control method for a feedwater pump in a nuclear energy steam supply project according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0051] Step S201, obtaining status feedback signals of each water supply pump.

[0052] In an embodiment of the present invention, the water supply pump status includes operation and shutdown, and the water supply pump status feedback signal includes a water supply pump operation signal and a water supply pump shutdown signal. Each water supply pump status feedback signal is obtained, and the water supply pump status feedback signal is uploaded to the DCS (Distributed Control System).

[0053] Step S202: judging the operating status of each water supply pump, whether it is stopped or running, based on the status feedback signal of each water supply pump.

[0054] In an embodiment of the present invention, the water supply pump status feedback signal includes a water supply pump operation signal and a water supply pump shutdown signal, and the operation status of the water supply pump is comprehensively judged as shutdown or operation based on the water supply pump operation signal and the water supply pump shutdown signal.

[0055] Step S203, judging whether the steam conversion system is operated by a single feedwater pump according to the operating status of each feedwater pump.

[0056] During normal operation, one of the two water feed pumps in operation fails, and the standby pump is unavailable for some reason, resulting in only a single water feed pump being in operation. When only a single water feed pump is in operation, the water supply volume decreases rapidly. Based on the water feed pump status feedback signal received by the DCS system, it is determined whether only a single water feed pump is in operation, so as to adjust the water supply volume in time.

[0057] Step S204, obtaining the external steam supply flow rate, and generating a single feedwater pump operation load shedding signal in combination with the external steam supply flow rate.

[0058] In an embodiment of the present invention, in order to avoid inaccurate judgment based only on the water supply pump status feedback signal, the steam flow supplied by the steam conversion system to the outside is obtained, and the steam flow supplied by the steam conversion system to the outside is superimposed to further judge the operation of a single water supply pump, and generate a single water supply pump operation load shedding signal, thereby further improving the accuracy of the single water supply pump operation judgment result.

[0059] Step S205, according to the load shedding signal of the single feedwater pump, the opening of the feedwater side regulating valve and the opening of the steam side regulating valve are adjusted accordingly.

[0060] In an embodiment of the present invention, during normal operation, if one of the two feed water pumps in operation fails and the standby pump is unavailable for some reason, resulting in only a single feed water pump being in operation, the load shedding action of the single feed water pump is triggered, and the opening of the feed water side regulating valve is adjusted accordingly, the steam volume and feed water volume are reduced, and the valve opening is also reduced to match the feed water flow rate when the single feed water pump is in operation. The opening of the steam side regulating valve is adjusted accordingly to reduce the heating steam source and maintain a balance between feed water and steam.

[0061] The feedwater pump load shedding logic control method for a nuclear energy steam supply project provided in this embodiment determines whether the operating condition of a single feedwater pump is running or shut down based on the feedwater pump status feedback signal, and superimposes the external steam supply flow to further determine whether the operating condition of the single feedwater pump occurs during normal operation, and generates a single feedwater pump operation load shedding signal to correspondingly adjust the opening of the feedwater side regulating valve and the opening of the steam measuring regulating valve, thereby ensuring the balance between the feedwater side and the steam side, and maintaining the balance between feedwater and steam.

[0062] In this embodiment, a method for load shedding logic control of a feedwater pump for a nuclear energy steam supply project is provided, and the process includes the following steps:

[0063] Step S301, obtaining status feedback signals of each water supply pump.

[0064] For details, please see Figure 2 Step S201 of the illustrated embodiment will not be described in detail here.

[0065] Step S302: judging the operating status of each water supply pump, whether it is stopped or running, based on the status feedback signal of each water supply pump.

[0066] Specifically, the above step S302 includes:

[0067] Step S3021, performing an inversion operation on each water supply pump operation signal.

[0068] Step S3022, performing AND operations on the inverted operation results of each water supply pump operation signal and each water supply pump shutdown signal, and judging whether the operation status of the water supply pump is shutdown or operation according to the AND operation results.

[0069] In the embodiment of the present invention, the water supply pump status includes water supply pump shutdown and water supply pump operation. To determine whether a water supply pump is shutdown, it is not only necessary to determine whether a water supply pump is shutdown by the water supply pump shutdown signal received by the DSC system, but also to determine whether a water supply pump is running by the water supply pump operation signal. Figure 3 As shown, each water supply pump operation signal is inverted, and the inverted operation signal of each water supply pump is ANDed with each water supply pump shutdown signal to comprehensively judge whether the operation status of the water supply pump is shutdown or operation.

[0070] When judging whether a single water supply pump is shut down or running, a comprehensive judgment is made not only based on the water supply pump shutdown signal, but also based on the water supply pump running signal, so as to avoid misjudgment caused by relying solely on the water supply pump shutdown signal.

[0071] Step S303: judging whether the steam conversion system is operated by a single feedwater pump according to the operating status of each feedwater pump.

[0072] Specifically, when the number of water supply pumps is three, the above step S303 includes:

[0073] Step S3031: If two of the three feedwater pumps are out of operation and one is in operation, it is determined that the steam conversion system is operated by a single feedwater pump.

[0074] In an embodiment of the present invention, when three feed water pumps are configured, the normal operation is two in operation and one in standby. When two feed water pumps are stopped and one feed water pump is running, it is determined that the steam conversion system is operated by a single feed water pump. Otherwise, the steam conversion system is not operated by a single feed water pump.

[0075] By using the judgment condition that two of the three feed water pumps are stopped and one feed water pump is running, it is determined whether the steam conversion system is operating in the condition of a single feed water pump, so as to detect abnormal conditions in time.

[0076] Step S304, obtaining the external steam supply flow rate, and generating a single feedwater pump operation load shedding signal in combination with the external steam supply flow rate.

[0077] Specifically, the above step S304 includes:

[0078] Step S3041, determining whether the external steam flow rate is greater than a preset steam flow rate threshold.

[0079] Step S3042: If the external steam supply flow rate is greater than the preset steam flow rate threshold, it is determined that the operation of the single feedwater pump occurs during normal operation, and a single feedwater pump operation load shedding signal is generated.

[0080] In the embodiment of the present invention, on the basis of judging whether a single feedwater pump is operating according to the feedback signal of the feedwater pump state, the judgment result of the external steam supply flow rate is further superimposed to judge whether the external steam supply flow rate is greater than the preset steam flow rate threshold value A. If the external steam supply flow rate is greater than the preset steam flow rate threshold value A, it is considered that the system is in normal operation, and by superimposing this condition, it can be further judged that the operation of a single feedwater pump occurs during normal operation.

[0081] Based on the judgment of the operation of the feedwater pump according to the feedback signal of the feedwater pump status, the operating condition of the feedwater pump is comprehensively judged in combination with the comparison result of the external steam flow rate and the preset steam flow rate threshold. When the external steam flow rate is greater than the preset steam flow rate threshold, it is further judged that the operation of the single feedwater pump occurs during normal operation, and a single feedwater pump operation load shedding signal is generated during normal operation to avoid adjusting the valve during misjudgment.

[0082] Step S305, according to the load shedding signal of the single feedwater pump, the opening of the feedwater side regulating valve and the opening of the steam side regulating valve are adjusted accordingly.

[0083] Specifically, the above step S305 includes:

[0084] Step S3051, when a single feedwater pump operation load shedding signal is detected, the opening of the feedwater side regulating valve and the opening of the steam side regulating valve are adjusted to preset fixed openings respectively.

[0085] In the embodiment of the present invention, during normal operation, the water supply side and the steam side of the steam conversion system maintain a balanced state. When a single water supply pump is in operation, the water supply capacity decreases and the water supply volume decreases. When the load shedding action of the single water supply pump is triggered, the opening of the water supply side regulating valve is adjusted accordingly to a preset fixed opening, and the opening of the steam side regulating valve is adjusted to a preset fixed opening at the same time to ensure the balance between the water supply side and the steam side.

[0086] According to the load shedding signal of a single feedwater pump, the opening of the feedwater side regulating valve is adjusted to the preset fixed opening to match the feedwater flow rate when the single feedwater pump is running. At the same time, the opening of the steam measuring regulating valve is adjusted to the preset fixed opening to reduce the heating steam source and maintain the balance between feedwater and steam.

[0087] In some optional implementations, before respectively adjusting the opening of the water supply side regulating valve and the opening of the steam side regulating valve to fixed openings, the method further includes:

[0088] Step Sa, respectively setting the fixed opening of the water supply side regulating valve and the fixed opening of the steam side regulating valve according to the valve characteristic curve.

[0089] In an embodiment of the present invention, during the design, the fixed opening of the water supply side regulating valve and the fixed opening of the steam side regulating valve are set in combination with the valve characteristic curve. The valve characteristic curve is used to show the relationship between the valve opening and parameters such as flow rate and pressure. The fixed opening of the regulating valve is set according to the valve characteristic curve to adapt to different working conditions and achieve a balance between water supply and steam flow.

[0090] By setting the fixed opening of the water supply side regulating valve and the fixed opening of the steam measuring regulating valve according to the valve characteristic curve, the valve opening that matches the valve characteristic curve under actual working conditions can be determined, providing data support for valve adjustment.

[0091] Step Sb, obtaining debugging data, and verifying and correcting the fixed opening of the water supply side regulating valve and the fixed opening of the steam side regulating valve according to the debugging data.

[0092] In the embodiment of the present invention, during the debugging stage, the actual working conditions are simulated, debugging data is collected, and the preset fixed opening of the water supply side regulating valve and the fixed opening of the steam measuring regulating valve are verified and corrected according to the debugging data. For example, under the preset fixed opening, if the deviation between the actual water supply flow rate and the expected water supply flow rate is large, it indicates that the preset fixed opening is unreasonable, and the preset fixed opening is corrected.

[0093] The present embodiment provides a feedwater pump load shedding logic control method for a nuclear energy steam supply project, which verifies and corrects the fixed opening of the feedwater side regulating valve and the fixed opening of the steam side regulating valve according to debugging data, so that the set valve fixed opening is more in line with the actual working conditions.

[0094] like Figure 4 As shown, Figure 4 It is a logic diagram for the control of the regulating valve on the water supply side. The water level on the shell side of the steam valve and the water level setting value are used as inputs of the PID module. The control signal output by the PID module is input into the first switching module. The action valve position signal and other interlocking or protection action signals in the system are also used as inputs and input into the first switching module. The first switching module outputs according to the preset logical rules. The output of the first switching module, the preset valve position X1, and the load shedding signal of a single water supply pump are used as inputs of the second switching module. The second switching module outputs the valve control instruction.

[0095] like Figure 5 As shown, Figure 5 It is a logic diagram for controlling the steam-side regulating valve. The external steam pressure and the pressure setting value are used as inputs of the PID module. The control signal output by the PID module is input into the first switching module. The action valve position signal and other interlocking or protection action signals in the system are also used as inputs and input into the first switching module. The first switching module outputs according to the preset logic rules. The output of the first switching module, the preset valve position X2, and the load shedding signal of a single feedwater pump are used as inputs of the second switching module. The second switching module outputs the valve control instruction.

[0096] In this embodiment, a feedwater pump load shedding logic control device for a nuclear energy steam supply project is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0097] This embodiment provides a feedwater pump load shedding logic control device for a nuclear energy steam supply project, such as Figure 6 As shown, including:

[0098] The acquisition module 601 is used to acquire the status feedback signals of each water supply pump, and the status feedback signals of the water supply pump include the water supply pump operation signal and the water supply pump shutdown signal.

[0099] The first judgment module 602 is used to judge whether the operating state of each water supply pump is stopped or running according to the state feedback signal of each water supply pump.

[0100] The second judgment module 603 is used to judge whether the steam conversion system is operated by a single feedwater pump according to the operation status of each feedwater pump.

[0101] The signal generating module 604 is used to obtain the external steam supply flow rate, and generate a load shedding signal for a single feedwater pump in combination with the external steam supply flow rate.

[0102] The adjustment module 605 is used to adjust the opening of the water supply side regulating valve and the opening of the steam measuring regulating valve accordingly according to the load shedding signal of the single water supply pump.

[0103] In some optional implementations, the first determining module 602 includes:

[0104] The first operation unit is used to perform an inversion operation on each water supply pump operation signal.

[0105] The second operation unit is used to perform AND operation on the inverted operation results of each water supply pump operation signal and each water supply pump shutdown signal, and determine whether the operation status of the water supply pump is shutdown or operation according to the AND operation results.

[0106] In some optional implementations, the second determination module 603 includes:

[0107] The determination subunit is used to determine that the steam conversion system is operated with a single feedwater pump if two of the three feedwater pumps are out of operation and one feedwater pump is in operation.

[0108] In some optional implementations, the signal generation module 604 includes:

[0109] The judging unit is used to judge whether the external steam flow rate is greater than a preset steam flow rate threshold.

[0110] The signal generating unit is used to judge that the operation of the single feedwater pump occurs during normal operation if the external steam supply flow rate is greater than a preset steam flow rate threshold, and to generate a load shedding signal for the operation of the single feedwater pump.

[0111] In some optional implementations, the adjustment module 605 includes:

[0112] The adjustment unit is used to adjust the opening of the water supply side regulating valve and the opening of the steam measuring regulating valve to preset fixed openings respectively when a load shedding signal of a single water supply pump is detected.

[0113] In some optional embodiments, the device further comprises:

[0114] The setting module is used to set the fixed opening of the water supply side regulating valve and the fixed opening of the steam measuring regulating valve according to the valve characteristic curve.

[0115] In some optional embodiments, the device further comprises:

[0116] The correction module is used to obtain the debugging data, and verify and correct the fixed opening of the water supply side regulating valve and the fixed opening of the steam measuring regulating valve according to the debugging data.

[0117] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0118] The feedwater pump load shedding logic control device for the nuclear steam supply project in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0119] The embodiment of the present invention also provides a computer device having the above Figure 6 The shown device is a load shedding logic control device for feedwater pumps in a nuclear steam supply project.

[0120] See also Figure 7 , Figure 7 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 7 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 7 A processor 10 is taken as an example.

[0121] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0122] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0123] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0124] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0125] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 7 The example of connecting through bus is taken in the following.

[0126] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the computer device, such as a touch screen, etc. The output device 40 can include a display device, etc.

[0127] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0128] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0129] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope of the present application.

Claims

1. A method for load shedding logic control of feedwater pumps for nuclear energy steam supply projects, characterized in that: The method comprises: Acquire status feedback signals of each water supply pump, wherein the status feedback signals of the water supply pump include a water supply pump operation signal and a water supply pump shutdown signal; According to the feedback signals of the water supply pump states, determining whether the operation state of each water supply pump is stopped or in operation; According to the operating status of each feedwater pump, determine whether the steam conversion system is operating with a single feedwater pump; Obtaining an external steam supply flow rate, and generating a single feedwater pump operation load shedding signal in combination with the external steam supply flow rate; According to the load shedding signal of the single feed water pump, the opening of the feed water side regulating valve and the opening of the steam measuring regulating valve are adjusted accordingly.

2. The method according to claim 1, characterized in that The step of judging, based on the feedback signals of the water supply pump states, whether the operation state of each water supply pump is stopped or in operation comprises: Perform inversion operation on each water supply pump operation signal; The inverted operation results of each water supply pump operation signal are respectively ANDed with each water supply pump shutdown signal, and the operation status of the water supply pump is determined based on the AND operation results, whether it is shutdown or operation.

3. The method according to claim 1, characterized in that When the number of feedwater pumps is three, the step of determining whether the steam conversion system is operated by a single feedwater pump includes: If two of the three feedwater pumps are out of service and one is in service, it is determined that the steam conversion system is operating with a single feedwater pump.

4. The method according to claim 1, characterized in that The generating of a single feedwater pump operation load shedding signal in combination with the externally supplied steam flow rate comprises: Determining whether the external steam supply flow rate is greater than a preset steam flow rate threshold; If the external steam supply flow rate is greater than a preset steam flow rate threshold, it is determined that the operation of the single feedwater pump occurs during normal operation, and a single feedwater pump operation load shedding signal is generated.

5. The method according to claim 1, characterized in that According to the load shedding signal of the single feedwater pump, the opening of the feedwater side regulating valve and the opening of the steam side regulating valve are correspondingly adjusted, including: When the load shedding signal of the single feed water pump is detected, the opening of the feed water side regulating valve and the opening of the steam side regulating valve are adjusted to the preset fixed openings respectively.

6. The method according to claim 5, characterized in that Before respectively adjusting the opening of the water supply side regulating valve and the opening of the steam side regulating valve to fixed openings, the method further includes: The fixed opening of the water supply side regulating valve and the fixed opening of the steam side regulating valve are set according to the valve characteristic curve.

7. The method according to claim 6, characterized in that The method further comprises: The debugging data is obtained, and the fixed opening of the water supply side regulating valve and the fixed opening of the steam side regulating valve are verified and corrected according to the debugging data.

8. A feedwater pump load shedding logic control device for a nuclear energy steam supply project, characterized in that: The device comprises: An acquisition module, used for acquiring status feedback signals of each water supply pump, wherein the status feedback signals of the water supply pump include a water supply pump operation signal and a water supply pump shutdown signal; A first judgment module is used to judge whether the operation status of each water supply pump is stopped or running according to the state feedback signal of each water supply pump; The second judgment module is used to judge whether the steam conversion system is operated by a single feedwater pump according to the operating status of each feedwater pump; A signal generating module, used for obtaining the external steam supply flow rate, and generating a load shedding signal for a single feedwater pump in combination with the external steam supply flow rate; The adjustment module is used to adjust the opening of the water supply side regulating valve and the opening of the steam measuring regulating valve accordingly according to the load shedding signal of the single water supply pump.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the load shedding logic control method for a feedwater pump for a nuclear energy steam supply project as described in any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the load shedding logic control method for a feedwater pump for a nuclear energy steam supply project according to any one of claims 1 to 7.

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