Method for pressure control of once-through steam generator under heavy load transient condition and computer storage medium

Abstract

This invention relates to a method and computer storage medium for pressure control of a DC steam generator under high-load transient conditions. The method includes: employing rapid control combining memory channels and measured channels, with pressure deviation as the core parameter during high-load transients. By real-time monitoring and rapid determination of whether preset conditions are met, if the conditions are met, the feedwater flow rate is quickly adjusted using the measured pressure deviation value at the initial moment; if not, adjustments are made based on the current measured pressure deviation value, ensuring the accuracy and timeliness of control. Secondly, this control strategy, by considering the actual pressure response of the OTSG, adopts a flexible adjustment mechanism, reducing reliance on traditional PID control, thereby enhancing stability and reliability under complex and rapidly changing conditions. Finally, by optimizing the control logic, frequent adjustments of the feedwater valves caused by rapid pressure changes are reduced.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant piping technology, and more particularly to a method for pressure control of a DC steam generator under high-load transient conditions and a computer storage medium. Background Technology

[0002] In nuclear power generation, high-load transient signals are often accompanied by a sharp deviation between nuclear power and secondary loop load, leading to a severe imbalance in the primary and secondary heat transfer processes of the OTSG (Operational-Transmit Steam Generator). Since both vapor and liquid phases exist simultaneously within the OTSG secondary heat transfer tubes, this heat transfer imbalance rapidly causes drastic fluctuations in tube pressure and steam / water flow rates. Faced with such rapid and complex operating changes, traditional multi-channel PID control often struggles to respond effectively. Improper adjustment may even trigger a protective shutdown mechanism, seriously threatening the safe and stable operation of the nuclear power plant.

[0003] The multi-channel, PID control proposed in "Pressure Control Method and System for DC Steam Generators" can achieve accurate control of OTSG pressure, but it is relatively complex and difficult to handle large load transient conditions. Based on this, the proposed technology "A Rapid Pressure Control Method for DC Steam Generators" generates flow deviation from the primary and secondary power circuits. While directly generating flow demand from power during rapid load changes causes rapid changes in feedwater, the actual response of the OTSG pressure does not participate in the control of feedwater demand, resulting in poor robustness. Furthermore, the rapid and sensitive response of the OTSG pressure during rapid load changes leads to rapid fluctuations in the feedwater valves, placing high demands on them and requiring further improvement in control robustness. Summary of the Invention

[0004] This application provides a method for pressure control of a DC steam generator under high-load transient conditions and a computer storage medium, which can solve the problem of instability in traditional control methods.

[0005] To address the aforementioned technical problems, the methods include: detecting whether a high-load transient condition has occurred;

[0006] If a high-load transient condition occurs, obtain the pressure measurement data at the outlet of the DC steam generator, and determine the measured pressure value based on the pressure measurement data;

[0007] The load value of the second loop is detected, and the target pressure value of the DC steam generator is determined based on the load value of the second loop.

[0008] The measured pressure deviation of the DC steam generator is calculated based on the measured pressure value and the target pressure value.

[0009] Determine whether the current preset conditions are met. If yes, control the feedwater flow of the DC steam generator according to the memory pressure deviation value, where the memory pressure deviation value is the measured pressure deviation value at the initial moment of the high load transient condition. If no, control the feedwater flow of the DC steam generator according to the current measured pressure deviation value.

[0010] In one embodiment, the direct-flow steam generator uses the heat energy generated by the reactor to drive the steam turbine, and the detection of whether a high-load transient condition occurs includes:

[0011] Nuclear power is obtained by detecting the neutron flux rate in the reactor core through multiple power range detection channels.

[0012] The secondary loop load value is obtained based on the pressure values ​​from multiple first-stage pressure measurement channels of the steam turbine.

[0013] The load deviation between the primary and secondary loops is obtained based on the nuclear power and the secondary loop load value. The occurrence of a large load transient condition is detected based on the load deviation between the primary and secondary loops.

[0014] In one embodiment, the secondary loop load value is obtained based on the pressure values ​​from multiple first-stage pressure measurement channels of the steam turbine, including:

[0015] Calculate the average of the multiple pressure values ​​to obtain a pressure average;

[0016] The average pressure value is input into a first function generator to obtain the second-loop load value; wherein, the first function generator is used to convert the pressure value into the corresponding second-loop load value.

[0017] In one embodiment, the step of detecting whether a large load transient condition has occurred based on the load deviation between the primary and secondary circuits includes:

[0018] The load change rate is calculated based on the load deviation of the first and second circuits and the preset coefficient.

[0019] If the rate of change of load exceeds the first threshold, a large load transient condition is determined to have occurred.

[0020] In one embodiment, acquiring the pressure measurement data at the outlet of the DC steam generator and determining the measured pressure value based on the pressure measurement data includes:

[0021] Acquire pressure measurement data from multiple pressure measuring points at the outlet of a DC steam generator;

[0022] The largest pressure measurement data is selected from the multiple pressure measurement data as the measured pressure value.

[0023] In one embodiment, the calculation of the measured pressure deviation value of the DC steam generator based on the measured pressure value and the target pressure value includes:

[0024] The measured pressure value is filtered to obtain the processed measured pressure value;

[0025] The measured pressure deviation value is obtained based on the difference between the processed measured pressure value and the target pressure value.

[0026] In one embodiment, the preset conditions include:

[0027] The current measured pressure deviation value is within the first preset range, or the current time is within the second preset range from the initial moment of the high load transient condition.

[0028] In one embodiment, the control of the feedwater flow rate of the DC steam generator based on the memory pressure deviation value includes:

[0029] The memory pressure deviation value is obtained as an input signal and transmitted to the second function generator, which then converts it into a water supply flow demand.

[0030] The control of feedwater flow rate of the DC steam generator based on the current measured pressure deviation value includes:

[0031] The current measured pressure deviation value is obtained as an input signal and transmitted to the second function generator, which then converts it into a water supply flow demand. The second function generator is used to convert the pressure deviation value into a corresponding water supply flow adjustment.

[0032] In one embodiment, the water flow demand is converted into a water supply valve opening demand signal by a third function generator, and the water supply valve opening demand signal is applied to the water supply valve of the DC steam generator to adjust the opening.

[0033] This application also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for pressure control of a DC steam generator under high-load transient conditions as described in any one of the above claims.

[0034] Implementing this invention offers the following advantages: First, by monitoring in real time and quickly determining whether preset conditions have been met, the water supply flow rate is rapidly adjusted using the measured pressure deviation value at the initial moment once the conditions are met; if not, adjustments are made based on the real-time measured pressure deviation value, ensuring the accuracy and timeliness of control. Second, this control strategy, by considering the actual pressure response of the OTSG and employing a flexible adjustment mechanism, reduces reliance on traditional PID control, thereby enhancing stability and reliability in the face of complex and rapidly changing operating conditions. Finally, by optimizing the control logic, frequent adjustments to the water supply valves caused by rapid pressure changes are reduced. This not only lowers the mechanical pressure on the valves and extends their service life but also reduces maintenance costs and potential risks caused by valve failures. Attached Figure Description

[0035] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic flowchart of a method for pressure control of a DC steam generator under high-load transient conditions, as described in one embodiment.

[0037] Figure 2 This is a logic diagram illustrating the generation of a high-load transient signal in one embodiment.

[0038] Figure 3 A schematic diagram of the logic for generating measured pressure signals from an OTSG embodiment;

[0039] Figure 4 A flowchart illustrating rapid pressure control of an OTSG embodiment;

[0040] Figure 5 This is a schematic diagram of the OTSG pressure fast control logic in one embodiment. Detailed Implementation

[0041] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein are combined with other embodiments.

[0043] It should be noted that the terms "first" and "second" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" explicitly or implicitly include at least one of those features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0044] The OTSG (One-Way Steam Generator) is a key component connecting the primary and secondary loops of a reactor, its function being to transfer heat between the two loops. The OTSG uses the heat energy generated by the reactor to drive the steam turbine. Specifically, the heat generated by the reactor is transferred to the OTSG through the primary loop; the steam generator then transfers the heat to the water in the secondary loop, turning it into steam. The steam enters the steam turbine, driving its rotation and generating electricity. Typically, OTSG pressure control allows for matching of nuclear power output with the target load on the steam turbine.

[0045] like Figure 1 As shown, in one embodiment of a method for controlling the pressure of a DC steam generator under a high-load transient condition, the method includes: S1: detecting whether a high-load transient condition has occurred; this method is used to achieve rapid and stable control of the OTSG pressure when a high-load transient condition occurs, so as to ensure the safe and stable operation of the nuclear power plant.

[0046] Specifically: S11: Obtain nuclear power by measuring the flux rate of neutrons in the reactor core through multiple power range detection channels. Specifically, obtain the nuclear power by taking the maximum value of multiple flux rates based on the flux rate of neutrons in the reactor core through multiple power range detection channels.

[0047] like Figure 2 As shown, nuclear power monitoring specifically includes: n power range detection channels (n is an integer greater than 1) in the reactor, used to monitor the neutron flux rate in the reactor core in real time. The neutron flux rate in the reactor core is obtained through these n channels, denoted as φ1, φ2, ..., φ n The maximum value among these injection rates is selected, i.e., max(φ1, φ2, ..., φ). n The maximum value is used as the current nuclear power. This is because, under high-load transient conditions, the highest neutron flux rate in the reactor core most directly reflects the intensity of the nuclear reaction.

[0048] S12. Based on the pressure values ​​of multiple first-stage pressure measurement channels of the steam turbine, obtain the primary and secondary loop load values. Specifically, calculate the average value of multiple pressure values ​​to obtain the pressure average value; input the pressure average value into the first function generator to obtain the secondary loop load value; wherein, the first function generator is used to convert the pressure value into the corresponding secondary loop load value.

[0049] The secondary loop load monitoring is as follows: The steam turbine has i first-stage pressure measurement channels (i is an integer greater than 1) to monitor pressure changes at the turbine inlet. The pressure values ​​of the first stage of the steam turbine are obtained through these i channels, denoted as P1, P2, ..., P... i Calculate the load values ​​for the second circuit: First, calculate the average of these pressure values, i.e., Average(P1, P2, ..., P...). i Then, this average value is converted into a secondary loop load value using a preset first function generator. The first function generator contains a pre-set calculation formula. This conversion process considers the specific relationship between pressure and load, ensuring an accurate reflection of the actual load conditions of the secondary loop.

[0050] S13. Calculate the load deviation between the primary and secondary loops based on the nuclear power and the secondary loop load value, and detect whether a large load transient condition has occurred based on the load deviation between the primary and secondary loops. Specifically, detecting the occurrence of a large load transient condition based on the load deviation between the primary and secondary loops includes: calculating the load change rate based on the load deviation between the primary and secondary loops and a preset coefficient; if the load change rate exceeds a first threshold, a large load transient condition is determined to have occurred; specifically, the load change rate is calculated using a preset formula based on the load deviation between the primary and secondary loops and the preset coefficient. The preset formula is:

[0051]

[0052] in, These are preset coefficients; R represents the load deviation between the first and second circuits; R is the load change rate.

[0053] In one embodiment, the primary and secondary loop load deviation can be obtained by substituting the difference between the nuclear power and the secondary loop load into a first preset formula. The rate of change is calculated using the first preset formula, where the coefficient τ for calculating the rate of change is determined based on analysis and verification. The processed rate of change signal is then compared to a threshold; when the rate of change exceeds the threshold, a high-load transient signal is generated.

[0054] The specific steps include: calculating the load change rate R using a first preset formula; then comparing the calculated load change rate R with a preset threshold to determine if a large load transient condition has occurred; if R exceeds the threshold, a large load transient condition is confirmed, and a corresponding signal is generated. These signals then trigger a series of preset emergency response measures, including but not limited to adjusting feedwater flow, changing steam discharge strategies, and activating standby equipment.

[0055] Furthermore, S2: If a high-load transient condition occurs, obtain the pressure measurement data at the outlet of the DC steam generator, and determine the measured pressure value based on the pressure measurement data; the specific steps include: if a high-load transient condition occurs, obtain the pressure measurement data at multiple pressure measuring points at the outlet of the DC steam generator, and select the largest pressure measurement data from the multiple pressure measurement data as the measured pressure value.

[0056] like Figure 3 As shown, specifically, j pressure measurement points (j is an integer greater than 1) can be set at the OTSG outlet, and the maximum value of the j measured values ​​is taken to represent the actual measured pressure of the OTSG.

[0057] S21: At the moment a high-load transient condition is confirmed, comprehensive monitoring of the OTSG outlet pressure is performed. By pre-setting j pressure measurement points at the OTSG outlet, j pressure measurements reflecting different locations and time points can be captured and collected in real time. To accurately grasp the pressure state, the maximum value is selected from these measurements. The measured pressure value is filtered to ensure data accuracy and reliability, resulting in a processed measured pressure value. The difference between the processed measured pressure value and the target pressure value is used to obtain the measured pressure deviation value.

[0058] Furthermore, S3: Detect the load value of the second loop, and determine the target pressure value of the DC steam generator based on the load value of the second loop.

[0059] like Figure 4As shown, specifically, based on the real-time detected load value of the secondary loop, the target pressure value of the OTSG under the current operating conditions is determined through a preset algorithm or lookup table. The rate of change of the load deviation between the primary and secondary loops is continuously monitored. Once this rate of change exceeds a preset threshold, a high-load transient signal is triggered, activating the OTSG's rapid pressure control mode. This mode includes two control paths: a measured channel and a memory channel. Determining the target pressure value remains a key parameter for ensuring stable operation and safety.

[0060] Furthermore, S4: Calculate the measured pressure deviation value of the DC steam generator based on the measured pressure value and the target pressure value.

[0061] Specifically, the measured OTSG pressure value obtained in stage S2 (after filtering to eliminate noise) is first subtracted from the target pressure value determined in stage S3 at the same time to obtain the measured pressure deviation value.

[0062] Further, S5: Determine whether the current preset conditions are met. If yes, control the feedwater flow of the DC-DC steam generator based on the memory pressure deviation value, where the memory pressure deviation value is the measured pressure deviation value at the initial moment of the high-load transient condition. If not, control the feedwater flow of the DC-DC steam generator based on the current measured pressure deviation value. The preset conditions include: the current measured pressure deviation value is within a first preset range, or the current time distance from the initial moment of the high-load transient condition is within a second preset range. Specifically, if the current preset conditions are met, it means: the current measured pressure deviation value is greater than or equal to the second threshold, or the current time distance from the initial moment of the high-load transient condition is less than or equal to the third threshold.

[0063] If the current conditions are not met: the current measured pressure deviation is less than the second threshold, and the current time is greater than the initial time of the high load transient condition than the third threshold.

[0064] S51: If the preset conditions are met, the memorized pressure deviation value is acquired as an input signal and transmitted to the second function generator GF3, which then converts it into a water supply flow demand. If not, the current measured deviation value is acquired as an input signal and transmitted to the second function generator GF3, which then converts it into a water supply flow demand. The second function generator converts the pressure deviation value into a corresponding water supply flow adjustment. If the preset conditions are not met, the current measured pressure deviation value is acquired in real time and input as an input signal to the second function generator GF3. The second function generator GF3 calculates the corresponding water supply flow demand using its built-in algorithm.

[0065] S52: The water flow demand is converted into a water valve opening demand signal through the third function generator GF4. The water valve opening demand signal is applied to the water valve of the DC steam generator to regulate the opening.

[0066] Specifically, for the OTSG water supply flow control strategy, the first step is to assess whether the current conditions are met. The preset conditions mainly include two aspects: first, whether the measured pressure deviation value exceeds a preset threshold; and second, whether the current time is within another preset time limit from the initial moment of the high-load transient condition.

[0067] like Figure 5 As shown, specifically, if the current preset conditions are met (the current measured pressure deviation is greater than or equal to the second threshold, or the current time distance from the initial moment of the high-load transient condition is less than or equal to the third threshold), it is determined that the current situation is in the initial stage of a transient condition requiring rapid response and stable control. To effectively avoid violent oscillations of the feedwater valve and stabilize the feedwater flow, a memory channel control method is selected. At this time, the memory pressure deviation value recorded at the initial moment of the high-load transient condition is used as the input signal. This memory pressure deviation value is then input into the second function generator GF3, which converts it into the corresponding feedwater flow demand through a specific algorithm or mapping relationship. Next, this feedwater flow demand is further processed by the third function generator GF4 and converted into the opening degree demand signal of the feedwater valve, thereby achieving precise control of the feedwater valve.

[0068] If the preset conditions are not met (the current measured pressure deviation is less than the second threshold and the current time is greater than the third threshold from the initial moment of the high-load transient condition), it is considered that the current situation is within a relatively stable or normal adjustment range. At this time, the control mode of the measured channel will be switched. In the measured channel, the current measured pressure deviation value will be acquired in real time and input as an input signal to the second function generator GF3. The second function generator GF3 calculates the corresponding water flow demand using its built-in algorithm. Subsequently, this water flow demand will also pass through the third function generator GF4, converting it into a water valve opening demand signal. Unlike the memory channel, the measured channel continuously and dynamically acquires and adjusts measured data to ensure it can adapt to changes in actual operating conditions at any time.

[0069] This application also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the steps of any of the above-described methods for pressure control of a DC steam generator under high-load transient conditions.

[0070] In one embodiment of a computer storage medium provided by the present invention, a computer program is stored thereon. When the computer program is executed by a processor, it implements the steps of the method for pressure control of a DC steam generator under any of the high-load transient conditions described above. Specifically, it should be noted that the computer-readable medium described above in the present invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor device or apparatus, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be executed by instructions, used by a device or apparatus, or used in conjunction with it. In this invention, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. This propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, capable of sending, propagating, or transmitting a program for use by or in connection with instructions, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0071] The aforementioned computer-readable storage medium may be included in the aforementioned computer device; or it may exist independently and not assembled into the computer device.

[0072] This application employs a rapid control system combining memory channels and measured channels, using the measured pressure deviation as the core parameter during high-load transients. When the measured pressure deviation is greater than or equal to a threshold, or less than or equal to a time limit from the initial moment of the high-load transient, the memory channel initially records and fixes the OTSG pressure deviation at the beginning of the transient, setting a stable feedwater flow requirement to avoid valve overshoot and ensure a smooth transition. Subsequently, when the measured pressure deviation is less than the threshold and the time limit from the initial moment of the high-load transient is greater than the threshold, the system automatically switches to the measured channel, dynamically adjusting the feedwater flow based on the real-time pressure deviation. This achieves precise and flexible control, effectively solving the OTSG heat transfer imbalance and pressure fluctuation problems under high-load transients, ensuring the safe and stable operation of the nuclear power plant.

[0073] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method for pressure control of a direct-flow steam generator under high-load transient conditions, characterized in that, include: Detect whether a high-load transient condition occurs; If a high-load transient condition occurs, obtain the pressure measurement data at the outlet of the DC steam generator, and determine the measured pressure value based on the pressure measurement data; The load value of the second loop is detected, and the target pressure value of the DC steam generator is determined based on the load value of the second loop. The measured pressure deviation of the DC steam generator is calculated based on the measured pressure value and the target pressure value. Determine whether the current measured pressure deviation value is within the first preset range, or whether the current time distance from the initial moment of the high-load transient condition is within the second preset range. If yes, then control the feedwater flow of the DC steam generator based on the memorized pressure deviation value, where the memorized pressure deviation value is the measured pressure deviation value at the initial moment of the high-load transient condition. If no, then control the feedwater flow of the DC steam generator based on the current measured pressure deviation value.

2. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 1, wherein the DC steam generator utilizes the thermal energy generated by the reactor to drive the steam turbine, characterized in that, The detection of whether a high-load transient condition has occurred includes: Nuclear power is obtained by detecting the neutron flux rate in the reactor core through multiple power range detection channels. The secondary loop load value is obtained based on the pressure values ​​from multiple first-stage pressure measurement channels of the steam turbine. The load deviation between the primary and secondary loops is obtained based on the nuclear power and the secondary loop load value. The occurrence of a large load transient condition is detected based on the load deviation between the primary and secondary loops.

3. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 2, characterized in that, The secondary loop load values ​​are obtained based on the pressure values ​​from multiple first-stage pressure measurement channels of the steam turbine, including: Calculate the average of the multiple pressure values ​​to obtain a pressure average; The average pressure value is input into a first function generator to obtain the second-loop load value; wherein, the first function generator is used to convert the pressure value into the corresponding second-loop load value.

4. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 2, characterized in that, The method of detecting whether a large load transient condition has occurred based on the load deviation between the primary and secondary circuits includes: The load change rate is calculated based on the load deviation of the first and second circuits and the preset coefficient. If the rate of load change exceeds the first threshold, a large load transient condition is determined to have occurred.

5. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 1, characterized in that, The process of acquiring pressure measurement data at the outlet of the DC steam generator and determining the measured pressure value based on the pressure measurement data includes: Acquire pressure measurement data from multiple pressure measuring points at the outlet of a DC steam generator; The largest pressure measurement data is selected from the multiple pressure measurement data as the measured pressure value.

6. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 1, characterized in that, The step of calculating the measured pressure deviation value of the DC steam generator based on the measured pressure value and the target pressure value includes: The measured pressure value is filtered to obtain the processed measured pressure value; The measured pressure deviation value is obtained based on the difference between the processed measured pressure value and the target pressure value.

7. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 1, characterized in that, The control of feedwater flow rate of the DC steam generator based on the memory pressure deviation value includes: The memory pressure deviation value is obtained as an input signal and transmitted to the second function generator, which then converts it into a water supply flow demand. The control of feedwater flow rate of the DC steam generator based on the current measured pressure deviation value includes: The current measured pressure deviation value is obtained as an input signal and transmitted to the second function generator, which then converts it into a water supply flow demand. The second function generator is used to convert the pressure deviation value into a corresponding water supply flow adjustment.

8. The method for pressure control of a DC steam generator under high-load transient conditions according to claim 7, characterized in that, The water supply flow demand is converted into a water supply valve opening demand signal by a third function generator, and the water supply valve opening demand signal is applied to the water supply valve of the DC steam generator to adjust the opening.

9. A computer storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for pressure control of a DC steam generator under high load transient conditions as described in any one of claims 1-8.

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