Automatic steam boosting control device and method for high-temperature gas cooled reactor turbine

Abstract

The invention relates to the technical field of high-temperature gas cooled reactor starting control, and discloses an automatic steam boosting control device and method for a high-temperature gas cooled reactor turbine. When the steam pressure in front of the machine reaches a first preset rated pressure value, an automatic boosting stop instruction is triggered; the starting reactor system inlet valve adjusting control module generates a starting and stopping reactor inlet valve adjusting instruction based on a boosting requirement determined by a first preset initial pressure value, a first preset rated pressure value and boosting time; the bypass valve pressure control module generates a bypass valve control instruction based on the automatic boosting instruction, a preset manual pressure given value and a boosting requirement determined based on a second preset initial pressure value, a second preset rated pressure value and boosting time; the control valve pressure control module generates a control valve control instruction based on a real-time pressure given value and an actual value in the boosting process, so that the steam pressure is automatically increased to the rated pressure after the steam turbine is connected to the grid, and the starting efficiency of a unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high temperature reactor automatic control, and in particular to a device and method for automatically increasing steam pressure of a high temperature gas-cooled reactor steam turbine. Background Art

[0002] The high-temperature gas-cooled reactor is equipped with two nuclear steam supply system (NSSS) modules connected to a steam turbine generator set. Each NSSS module includes a single-loop system consisting of a nuclear reactor, a main helium fan and a direct current steam generator. Each NSSS module is equipped with an independent start-stop system and bypass system. When the unit is started, the 5MPa, 390℃ superheated steam after the start-stop inlet regulating valve cuts off the reduced pressure flows through the start-stop bypass and enters the turbine to run at 3000rpm; after grid connection, the bypass valve is fully closed, and the DEH control mode is switched to pressure control. The turbine inlet steam pressure is raised to the rated value of 11MPa by operating the start-stop inlet regulating valve and the turbine regulating valve, and then the steam is switched to the steam main pipeline for operation. The schematic diagram of the steam system is shown in the figure below. Figure 1 .

[0003] If dual-stack operation is required, the steam parameters of the other stack are boosted to 11.2MPa and 520℃ through its start-stop stack bypass, and then merged into the main steam main pipe through the steam main pipeline to enter the turbine for operation.

[0004] At present, the pressure increase of main steam and the cut-off of the start-stop system are realized by the operator manually operating the start-stop inlet isolation valve, the isolation valve before the bypass valve, the conventional island-side isolation valve between the steam generator and the steam main pipe, the DEH pressure control target value and the bypass valve pressure setting value. When operating the start-stop inlet regulating valve, the maximum increase instruction is 0.1%, 0.2% or 1% each time, and the operation frequency is large, which is easy to cause human error. Summary of the invention

[0005] In view of this, the present invention provides a device and method for automatically increasing steam pressure of a high temperature gas-cooled reactor steam turbine to avoid operator errors and improve the startup efficiency of the unit.

[0006] In a first aspect, the present invention provides a high temperature gas-cooled reactor steam turbine steam automatic pressure boost control device, comprising:

[0007] An automatic pressure-boosting control module, configured to trigger an automatic pressure-boosting instruction when a first preset initial pressure value and a preset automatic pressure-boosting condition are met, and trigger an automatic pressure-boosting stop instruction when the steam pressure in front of the machine reaches a first preset rated pressure value;

[0008] A start-up stack system inlet valve regulating control module is used to generate a start-stop stack inlet valve regulating instruction based on the first preset initial pressure value, the first preset rated pressure value, the boosting requirement determined by the boosting time, and the instruction generated by the automatic boosting control module;

[0009] a bypass valve pressure control module, configured to generate a bypass valve pressure control instruction based on a preset manual pressure set value, a second preset initial pressure value, a second preset rated pressure value, a boost requirement determined by a boost time, and an instruction generated by the automatic boost control module, wherein the second preset initial pressure value is greater than the first preset initial pressure value, and the second preset rated pressure value is greater than the first preset rated pressure value;

[0010] The regulating valve pressure control module is used to generate a regulating valve pressure control instruction based on a real-time pressure set value during the pressure boosting process and an actual value of the steam pressure in front of the machine, wherein the real-time pressure set value is between a first preset initial pressure value and a first preset rated pressure value.

[0011] The automatic steam pressure-increasing control device for a high-temperature gas-cooled reactor steam turbine provided in an embodiment of the present invention can automatically increase the steam pressure from an initial pressure value to a rated pressure after the steam turbine is connected to the grid through control, thereby reducing operator errors and improving the startup efficiency of the unit.

[0012] In an optional embodiment, the device further includes: a startup stack cut-off module, which is used to control the start-stop stack system inlet regulating valve to be fully opened, and control the conventional island side isolation valve pre-start valve on the steam main pipeline to be opened for pipe warming when the steam pressure before the machine stops rising to the first preset rated pressure value, the bypass valve pressure setting value reaches the second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches the preset opening, and control the conventional island side isolation valve on the steam main pipeline to be fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline to be closed, and the start-stop stack inlet isolation valve to be interlocked and closed after the conventional island side isolation valve on the main pipeline is fully opened, and the start-stop stack inlet regulating valve is controlled to be fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline to be opened, the conventional island side isolation valve on the steam main pipeline to be fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline to be closed, and the start-stop stack inlet isolation valve to be interlocked and closed in a specific order. This orderly valve operation can achieve a smooth transition between the startup stack and the main system, make the transition of the system operation state smoother, reduce interference with the operation of the entire system, and ensure the normal operation of the system.

[0013] The stack cutting module of the embodiment of the present invention starts subsequent operations only when the three conditions are met at the same time: the steam pressure in front of the machine rises to a preset rated pressure value, the bypass valve pressure setting value reaches a second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches a preset opening. This ensures that before the system starts the stack cutting operation, the various pressures and valve states are in a stable and appropriate state, making the switching process from the startup mode to the normal operating mode smoother, avoiding system shocks caused by pressure fluctuations or uncoordinated valve operations, and ensuring the stability and reliability of the entire system.

[0014] In an optional implementation, the automatic boost control module includes: an automatic boost condition configuration unit, a trigger unit, and an automatic boost stop configuration unit, wherein:

[0015] The automatic voltage boost condition configuration unit is used to perform a logical AND operation on the first preset initial pressure value and the preset automatic voltage boost condition, and generate a trigger signal when both the first preset initial pressure value and the preset automatic voltage boost condition are met, and input the trigger unit S terminal after maintaining the preset time, so as to trigger the automatic voltage boost instruction to be true;

[0016] The automatic boost stop configuration unit is used to generate a signal and input it into the trigger unit R terminal when the pressure value output by the target pressure subunit is equal to the first preset rated pressure value, so as to trigger the falling edge of the automatic boost instruction to be true, indicating the generation of the automatic boost stop instruction;

[0017] The R end of the trigger unit is false in the initial state. When the first preset initial pressure value and the preset automatic boost condition are all true, the automatic boost instruction is true; when the target pressure subunit is equal to the first preset rated pressure value, the automatic boost instruction is false, and the falling edge of the automatic boost instruction is true.

[0018] The automatic boost condition configuration unit of the embodiment of the present invention ensures that the automatic boost instruction is triggered to be true only when the preset initial target pressure value and the preset automatic boost condition are met at the same time and maintained for a preset time through a logical AND operation, thereby realizing the precise start of the automatic boost process. The automatic boost stop configuration unit accurately triggers the falling edge of the automatic boost instruction to be true when the pressure value output by the target pressure subunit is equal to the preset rated pressure value, generates an automatic boost stop instruction, and stops the boost process accurately when the target value is reached. The whole process has high control accuracy, and the trigger unit accurately controls the state of the automatic boost instruction according to the input of the automatic boost condition configuration unit and the automatic boost stop configuration unit. During the boost process, it can ensure that the pressure rises steadily according to the set requirements, avoiding pressure fluctuations or sudden changes. When the preset rated pressure value is reached, the pressure can be quickly stabilized to ensure that the system pressure is always under precise control, meeting the strict requirements of high-temperature gas-cooled reactor turbines and other systems for pressure stability. The automatic boost control module realizes the automatic control of the boost process. The automatic boost condition configuration unit, the trigger unit and the automatic boost stop configuration unit cooperate with each other, which greatly reduces the intensity and difficulty of manual operation, improves work efficiency, and reduces problems caused by manual operation errors.

[0019] In an optional implementation, the startup stack system inlet valve control module includes: a first selection unit, a second selection unit and a first belt rate output unit, wherein:

[0020] The first selection unit, in the initial state, when the automatic boost command is false, SW=false, outputs In1, the corresponding start-stop stack inlet regulating valve command is the preset manual input value, when the automatic boost command falls to true, after a preset delay time, SW=true, outputs In2, and the corresponding start-stop stack inlet regulating valve opening is fully open;

[0021] The second selection unit, in the initial state, SW=true, outputs In2, at which time the rate RT of the first rate output unit is equal to the first preset rate value;

[0022] The first rate output unit, in the initial state, SW=false, outputs In1, and the corresponding start-stop stack inlet valve regulating instruction is the preset manual input value. When the automatic pressure boost instruction is true and the pressure value output by the target pressure unit is less than the first intermediate target pressure value, SW=true, the output switches from In1 to In2, and the corresponding start-stop stack inlet valve regulating instruction meets the first pressure boost preset requirement; when the automatic pressure boost instruction is true and the target pressure is greater than the first intermediate target pressure value, the output switches from In1 to In2, and the corresponding start-stop stack inlet valve regulating instruction meets the second pressure boost preset requirement.

[0023] In the embodiment of the present invention, when the automatic pressure increase instruction is true, the first belt rate output unit makes the start-stop stack inlet valve control instruction meet the first pressure increase preset requirement and the second pressure increase preset requirement respectively according to the size relationship between the target pressure value and the first intermediate target pressure value, thereby realizing staged pressure increase control. This staged control method can more reasonably adjust the valve opening according to the characteristics of the system at different pressure stages, making the pressure increase process more stable and efficient, and helping to improve the overall performance of the system.

[0024] In an optional embodiment, the target pressure unit includes a second belt speed output unit and a third selection unit, wherein:

[0025] When the automatic pressure increase instruction is false, the corresponding SW of the second belt rate output unit is false, and the pressure value output by the target pressure unit corresponding to the output In1 is equal to the first manually set pressure value. When preparing to increase the pressure, the first manually set pressure value = the first preset initial pressure value;

[0026] When the automatic boost instruction is true, SW of the second rate output unit is true, and the output value of the target pressure unit switches from In1 to In2 based on the first preset rate within the preset boost time, and In2 corresponds to the first preset rated pressure value; during the boost process, the output value of the target pressure unit is input through In2 of the third selection unit and the first manually set pressure value is input through In1 of the third selection unit, so as to automatically track the real-time output value of the target pressure unit with the first manually set pressure value in real time, and when the output value of the target pressure unit rises to the first preset rated pressure value, the automatic boost instruction is reset to false, and the corresponding third selection unit SW is false, and In1 of the second rate output unit outputs the output value of the target pressure unit equal to the first manually set pressure value.

[0027] In the embodiment of the present invention, the second rate output unit and the third selection unit in the target pressure unit cooperate with each other to achieve flexible switching between manual and automatic modes, precise boost control and real-time pressure tracking in terms of pressure control, which has many advantages such as improving operational flexibility, ensuring boost accuracy and achieving smooth transition.

[0028] In an optional implementation, the bypass valve pressure control module includes a third belt speed output unit and a fourth selection unit, wherein:

[0029] The third belt speed output unit is in the initial state, when the automatic pressure increase instruction is false, outputs In1, and the corresponding bypass valve pressure setting value is equal to the second manually set pressure value, and the second manually set pressure value is equal to the second preset initial pressure value;

[0030] When the automatic pressure increase command is true, SW of the third belt rate output unit = true, and the bypass valve pressure setting value is switched from In1 to In2 based on the second preset rate (0.067 MPa / min within 90 min) within the preset pressure increase time;

[0031] During the boosting process, the bypass valve pressure setting value is tracked in real time through the In2 input of the fourth selection unit, and the second manually set pressure value is input through the In1 input of the fourth selection unit, so as to automatically track the bypass valve pressure setting value in real time with the second manually set pressure value. When the output value of the target pressure unit rises to the second preset rated pressure value, the automatic boost instruction is reset to false, and the corresponding fourth selection unit SW=false, and the bypass valve pressure setting value output by In1 of the second belt rate output unit is equal to the second manually set pressure value.

[0032] By presetting the boost time and rate, the embodiment of the present invention enables the bypass valve pressure setting value to accurately rise from the initial value to the target value, thereby ensuring that the bypass valve plays a suitable regulating role in the system boost process, and works in coordination with other parts of the system to jointly achieve stable boost and operation of the system. During the boost process, the fourth selection unit enables the second manually set pressure value to automatically track the bypass valve pressure setting value in real time, thereby avoiding the deviation between the manually set pressure value and the bypass valve pressure setting value during the automatic boost process, preventing system fluctuations or abnormalities caused by inconsistent pressures, and ensuring a smooth transition of the system between manual and automatic control, so that the bypass valve can continuously and stably regulate the system pressure to maintain stable operation of the system.

[0033] In an optional embodiment, the valve regulating pressure control module includes a PID controller and a multiplier. The pressure value output by the target pressure unit and a preset pressure set rate are input into the multiplier to obtain a pressure set value, and the pressure set value and the actual value of the steam pressure before the machine are input into the PID controller to generate a valve regulating pressure control instruction. When the deviation between the pressure set value and the actual pressure value is greater than a preset percentage of the rated pressure, the pressure control mode is controlled to automatically exit from the valve control mode.

[0034] The embodiment of the present invention can obtain a real-time pressure setting value through a multiplier according to the pressure value output by the target pressure unit and the preset pressure setting rate through a PID controller, and then accurately calculate and adjust it in combination with the actual value of the steam pressure before the machine. The PID controller can automatically adjust the control parameters according to the deviation between the actual pressure and the set pressure, so that the valve pressure can quickly and stably reach and remain near the set value, and can effectively suppress the influence of interference and uncertainty factors in the system on the pressure, reduce pressure fluctuations, make the adjustment process of the valve pressure more stable and fast, improve the response speed and adjustment quality of the system, and thus improve the operating performance and efficiency of the entire system.

[0035] In an optional implementation, the preset automatic voltage boost condition includes:

[0036] The nuclear power, feed water flow, and helium flow have reached their respective trigger thresholds, the DEH pressure control mode and automatic boost button have been put into operation, the start-stop reactor inlet regulating valve is in manual state and the opening is greater than the preset trigger threshold, and the bypass valve is in automatic state and the pressure value is greater than the preset pressure threshold.

[0037] The embodiment of the present invention comprehensively considers multiple parameters as boosting conditions, which helps to ensure the stability of steam pressure during the boosting process. The various parameters are interrelated and influence each other. Only when they are all within the appropriate range can the steam pressure be guaranteed to rise steadily, avoid pressure fluctuations from causing damage to the steam turbine and other equipment, and improve the reliability and stability of the system.

[0038] In a second aspect, the present invention provides a method for controlling automatic steam pressure increase of a high temperature gas-cooled reactor steam turbine, based on the device described in the first aspect, the method comprising:

[0039] Obtaining a first preset initial pressure value, a first preset rated pressure value and a pressure increase time for automatic pressure increase of a high temperature gas-cooled reactor steam turbine;

[0040] triggering an automatic pressure increase instruction based on a first preset initial pressure value and a preset automatic pressure increase condition, and triggering an automatic pressure increase stop instruction when the steam pressure in front of the machine reaches a first preset rated pressure value;

[0041] Generate a start-stop stack inlet valve regulating instruction based on the first preset initial pressure value, the first preset rated pressure value, the boosting requirement determined by the boosting time, and the instruction generated by the automatic boosting control module;

[0042] generating a bypass valve pressure control instruction based on a second preset initial pressure value, a second preset rated pressure value, a boost requirement determined by a boost time, and an instruction generated by the automatic boost control module, wherein the second preset initial pressure value is greater than the first preset initial pressure value, and the second preset rated pressure value is greater than the first preset rated pressure value;

[0043] The regulating valve pressure control instruction is generated based on the real-time pressure set value during the pressure boosting process and the actual value of the steam pressure in front of the machine.

[0044] The automatic steam boost control method for a high temperature gas-cooled reactor steam turbine provided by the embodiment of the present invention can set clear goals and time plans for the entire boost process by obtaining the initial pressure value, the preset rated pressure value and the boost time. The system can accurately control the rising process of the steam pressure based on these parameters, so that the pressure rises steadily at a preset rate, and finally accurately reaches the preset rated pressure value, meeting the precise requirements of the steam pressure for the stable operation of the steam turbine, and generating the start-stop stack inlet valve control instructions, bypass valve pressure control instructions and valve control instructions based on different conditions and requirements, respectively, to achieve precise control of multiple key valves. Each valve works in coordination with each other according to its own instructions, and can more finely adjust the flow and pressure of the steam, ensuring the accuracy and stability of the entire boost process. The entire control process realizes the automatic operation of the automatic steam boost of the high temperature gas-cooled reactor steam turbine, reduces manual intervention, improves the accuracy and efficiency of the operation, and also reduces the labor intensity of the operator and the possibility of human error.

[0045] In an optional embodiment, the method also includes: when the steam pressure in front of the machine rises to a preset first preset rated pressure value, the bypass valve pressure setting value reaches a second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches a preset opening, controlling the start-stop stack system inlet regulating valve to be fully opened, and controlling the conventional island side isolation valve pre-start valve on the steam main pipeline to be opened for pipe warming, and after a delay of a preset time, controlling the conventional island side isolation valve on the steam main pipeline to be fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline to be closed, and interlocking and closing the start-stop stack inlet isolation valve after the conventional island side isolation valve on the main pipeline is fully opened.

[0046] In the embodiment of the present invention, the subsequent operation is performed only after the steam pressure in front of the machine, the bypass valve pressure setting value and the opening of the start-stop system inlet regulating valve reach the corresponding preset values, which can ensure the stability of steam pressure and flow; the conventional island side isolation valve pre-start valve on the steam main pipeline is controlled to open for pipe warming, and the preset time is delayed, so that the steam main pipeline is evenly heated, ensuring that the temperature of each part of the pipeline gradually rises and reaches a uniform distribution, and the start-stop system inlet regulating valve is controlled to be fully opened, and the subsequent operation of the conventional island side isolation valve on the steam main pipeline is realized, so as to realize the orderly switching from the start-stop stage to the normal operation stage. This orderly switching ensures the continuity and stability of steam supply, so that the system can smoothly transition from one operating state to another, reducing the interference with the operation of the entire system; after the conventional island side isolation valve on the main pipeline is fully opened, the start-stop stack inlet isolation valve is interlocked and closed, forming a reliable interlock control mechanism to prevent misoperation, ensuring that the start-stop stack inlet isolation valve is closed in time after the steam main pipeline is operating normally, avoiding steam backflow or other abnormal situations, and enhancing the overall reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] 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.

[0048] Figure 1 is a schematic diagram of a steam turbine steam system according to an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of the functional modules of a high temperature gas-cooled reactor steam turbine automatic steam pressure boost control device according to an embodiment of the present invention;

[0050] Figure 3 is a schematic diagram of a logic configuration of an automatic boost control module according to an embodiment of the present invention;

[0051] Figure 4is a schematic diagram of a logic configuration of a startup stack system inlet regulating valve control module according to an embodiment of the present invention;

[0052] Figure 5 is a schematic diagram of a logical configuration of a target pressure unit according to an embodiment of the present invention;

[0053] Figure 6 is a schematic diagram of a logic configuration of a bypass valve pressure control module according to an embodiment of the present invention;

[0054] Figure 7 is a logical configuration diagram of a valve regulating pressure control module according to an embodiment of the present invention;

[0055] Figure 8 It is a logical configuration diagram of the startup stack removal module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] 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.

[0057] like Figure 1 The diagram shows a steam turbine steam system, which includes the following components: steam generator 1, start-stop system inlet regulating valve 2, steam-water separator 3, start-stop system bypass 4, isolation valve before bypass valve 5, 1# main steam valve 6, 2# main steam valve 7, 1# regulating valve 8, 3# regulating valve 9, 2# regulating valve 10, 4# regulating valve 11, steam turbine 12, generator 13, bypass valve 14, conventional island-side isolation valve between steam generator and steam main pipe 15, steam-water separator inlet isolation valve 16, steam-water separator outlet isolation valve 17, steam-water separator drain valve 18, start-stop system inlet isolation valve 19.

[0058] When the unit is started, the 5MPa, 390℃ superheated steam after the start-stop stack inlet regulating valve cuts off the pressure and flows through the start-stop stack bypass, enters the turbine and starts to run at 3000rpm; after connecting to the grid, the bypass valve is fully closed, and the DEH control mode is switched to pressure control. By operating the start-stop stack inlet regulating valve and the turbine regulating valve, the turbine inlet steam pressure is increased to the rated value of 11MPa, and then the steam is switched to the steam main pipeline for operation.

[0059] In order to realize that the steam pressure of the steam turbine is automatically increased from the initial pressure to the rated pressure after the steam turbine is connected to the grid, reduce operator errors, and improve the unit startup efficiency, the embodiment of the present invention provides a high-temperature gas-cooled reactor steam turbine steam automatic pressure increase control device. The steam turbine steam pressure increase system is composed of system equipment and DEH (steam turbine control system) platform, and logical configuration is performed. The steam pressure of the steam turbine is automatically increased to the rated pressure after the steam turbine is connected to the grid through sequential control. Figure 2 Schematic diagram of a steam automatic pressure-increasing control device for a high-temperature gas-cooled reactor steam turbine according to an embodiment of the present invention, comprising:

[0060] The automatic boost control module is used to trigger the automatic boost command when the first preset initial pressure value and the preset automatic boost condition are met, and trigger the automatic boost stop command when the steam pressure in front of the machine reaches the first preset rated pressure value; the automatic boost control module can accurately control the start and end of the boost process by triggering the automatic boost command and the automatic boost stop command, reducing the safety risks caused by human misjudgment or improper operation. The automatic triggering of the command makes the boost process more reliable and repeatable. Whether it is a normal startup or a restart after responding to some emergencies, as long as the preset conditions are met, the module can stably perform the boost operation, ensuring that the system can boost according to the established process and standards every time, improving the reliability and stability of the entire high-temperature gas-cooled reactor turbine system.

[0061] The start-up stack system inlet regulating valve control module is used to generate the start-stop stack inlet regulating valve instruction based on the first preset initial pressure value, the first preset rated pressure value, and the boosting requirement determined by the boosting time; this module can make the operation of the inlet regulating valve accurately match the requirements of the entire boosting process, and under different working conditions, according to the specific boosting target and time requirements, reasonably adjust the opening of the inlet regulating valve to make the changes in steam flow and pressure more stable and reasonable, thereby optimizing the entire boosting process. When the regulating valve smoothly adjusts the steam flow and pressure according to the boosting requirements, it can avoid the impact on pipelines, valves and other equipment caused by sudden pressure changes or excessive flow, thereby extending the service life of the equipment, reducing the equipment maintenance cost, and improving the overall reliability and stability of the equipment.

[0062] The bypass valve pressure control module is used to generate a bypass valve pressure control instruction based on a preset manual pressure set value, a second preset initial pressure value, a second preset rated pressure value, a boost requirement determined by the boost time, and an instruction generated by the automatic boost control module, wherein the second preset initial pressure value is greater than the first preset initial pressure value, and the second preset rated pressure value is greater than the first preset rated pressure value; the module can adjust the state of the bypass valve in real time according to the boost requirement to ensure that the steam pressure remains stable during the boost process. For example, when the system pressure fluctuates, the bypass valve can be opened or closed to a certain extent in time according to the pressure control instruction, adjust the flow and pressure of the steam, and return the system pressure to the normal range, thereby ensuring the stability of the entire boost process.

[0063] In one embodiment, for example, the first preset initial pressure value is 5 MPa, the second preset initial pressure value is 5.2 MPa, the first preset rated pressure value is 11 MPa, and the second preset rated pressure value is 11.2 MPa.

[0064] The regulating valve pressure control module is used to generate a regulating valve pressure control instruction based on the real-time pressure set value and the actual value of the steam pressure in front of the machine during the boosting process, wherein the real-time pressure set value is between the first preset initial pressure value and the first preset rated pressure value. In the embodiment of the present invention, the bypass valve pressure control module and the regulating valve pressure control module are set at different initial pressures and rated pressures, so that during the boosting process, the bypass valve is kept closed to avoid the turbine regulating valve and the bypass valve from regulating the pressure at the same time, causing pressure fluctuations. This module can enable the regulating valve to adjust the opening in time according to the difference between the actual pressure set value and the target pressure, so that the steam pressure in front of the machine is always close to the target pressure value. The regulating valve pressure control module can control the steam pressure in front of the machine within a very small error range through real-time comparison and adjustment, thereby improving the operating efficiency and stability of the entire system.

[0065] The automatic steam pressure-boosting control device for a high-temperature gas-cooled reactor steam turbine provided in an embodiment of the present invention can automatically increase the steam pressure from an initial pressure value (e.g., 5 MPa) to a rated pressure (e.g., 11 MPa) after the steam turbine is connected to the grid through control, thereby reducing operator errors and improving the startup efficiency of the unit.

[0066] The automatic boost control module in the embodiment of the present invention is as follows: Figure 3 As shown, it includes: an automatic boost condition configuration unit, a trigger unit, and an automatic boost stop configuration unit, wherein:

[0067] The automatic voltage boost condition configuration unit is used to perform a logical AND operation on the first preset initial pressure value and the preset automatic voltage boost condition, and to generate a trigger signal when both the first preset initial pressure value and the preset automatic voltage boost condition are met at the same time. The trigger signal is then input to the S terminal of the trigger unit after maintaining the signal for a preset time, so as to trigger the automatic voltage boost instruction to be true.

[0068] Specifically, the preset initial target pressure value is the steam pressure before the turbine of about 5MPa, and the preset automatic boost conditions are that the nuclear power, feed water flow, and helium flow reach their respective trigger thresholds, the DEH pressure control mode and the automatic boost button are in operation, the start-stop reactor inlet regulating valve is in manual state and the opening is greater than the preset trigger threshold, and the bypass valve is in automatic state and the pressure value is greater than the preset pressure threshold, such as nuclear power of about 27% RFP, feed water flow of about 27kg / s, and helium flow of 60kg / s. During the boost process, the nuclear power, feed water flow, and helium flow remain basically unchanged.

[0069] The embodiment of the present invention comprehensively considers multiple parameters such as nuclear power, feed water flow, helium flow, etc. as automatic boosting conditions, which can ensure that the operating states of various parts of the high-temperature gas-cooled reactor turbine system are coordinated with each other. At the same time, it requires that the DEH pressure control mode and the automatic boosting button have been put into use, and the start-stop stack inlet regulating valve is in manual state and the opening is greater than the preset trigger threshold, the bypass valve is in automatic state and the pressure value is greater than the preset pressure threshold, etc., which can avoid damage to the equipment caused by misoperation or boosting operation under abnormal equipment state. Strict automatic boosting condition setting can effectively reduce safety risks during system operation. The boosting operation is performed only when all conditions are met, which can avoid abnormal pressure increase caused by misjudgment of a single condition or local equipment failure, prevent safety accidents such as overpressure and leakage, and ensure the safety of personnel and equipment. At the same time, comprehensive consideration of multiple parameters as boosting conditions helps to ensure the stability of steam pressure during the boosting process.

[0070] The automatic boost stop configuration unit is used to generate a signal and input it into the R terminal of the trigger unit when the pressure value output by the target pressure subunit is equal to the first preset rated pressure value, so as to trigger the falling edge of the automatic boost instruction to be true, indicating the generation of the automatic boost stop instruction; it can ensure that the system pressure stops boosting when it reaches the first preset rated pressure value, so that the steam pressure is accurately matched with the rated pressure required for the operation of equipment such as the steam turbine, providing suitable pressure conditions for the stable operation of the equipment, ensuring the efficient operation of the equipment under the design parameters, and automatically and accurately stopping boosting at the preset rated pressure value, which helps to maintain the stability of the overall operation of the high-temperature gas-cooled reactor steam turbine system.

[0071] The trigger unit R end is false in the initial state. When the first preset initial pressure value and the preset automatic boost condition are all true, the automatic boost instruction is true; when the target pressure subunit is equal to the first preset rated pressure value, the automatic boost instruction is false, and the falling edge of the automatic boost instruction is true. Through the automatic switching and falling edge triggering mechanism of the automatic boost instruction, the automatic control of the boost process is realized, the need for manual intervention is reduced, the workload and difficulty of the operator are reduced, and the convenience and efficiency of the operation are improved. Through precise automatic boost control and timely stop mechanism, the risk of safety accidents caused by abnormal pressure in the system can be effectively reduced.

[0072] In the embodiment of the present invention, the stack system inlet valve control module is started, such as Figure 4 As shown, it includes: a first selection unit, a second selection unit and a first rate output unit, wherein:

[0073] The first selection unit, in the initial state, when the automatic boost command is false, SW = false, output In1, the corresponding start-stop stack inlet regulating valve command is a preset manual input value, for example, the opening is 48%, the falling edge of the automatic boost command is true, after a preset delay time, SW = true, output In2, the corresponding start-stop stack inlet regulating valve opening is fully open;

[0074] The second selection unit, in the initial state, SW=true, and the output is In2. At this time, the rate RT of the first rate output unit is equal to the first preset rate value, for example, the first preset rate value RT=0.083% / min;

[0075] The first rate output unit, in the initial state, SW=false, outputs In1, and the corresponding start-stop stack inlet valve regulating instruction is the preset manual input value. When the automatic pressure increase instruction is true and the pressure value output by the target pressure unit is less than the first intermediate target pressure value, SW=true, the output switches from In1 to In2, and the corresponding start-stop stack inlet valve regulating instruction meets the first pressure increase preset requirement (for example, from 48% to 53% at a rate of 0.083% / min within 60 minutes); when the automatic pressure increase instruction is true and the target pressure is greater than the first intermediate target pressure value (for example, 9MPa), the output switches from In1 to In2, and the corresponding start-stop stack inlet valve regulating instruction meets the second pressure increase preset requirement (for example, from 53% to 64% at a rate of 0.37% / min within 30 minutes).

[0076] It should be noted that the boosting process of 5MPa-11MPa takes a total of 90 minutes (obtained based on actual measurement results). The residual flow capacity of the start-stop reactor inlet regulating valve is still strong at around 50% valve position, and the valve opening rate should not be too large, otherwise it will easily cause pressure oscillation. Therefore, before the pressure rises to 9MPa, the valve opening rate is 0.083% / min; as the residual flow capacity decreases, the valve opening rate can be increased to 0.37% / min; after the opening is greater than 64%, the valve is equivalent to fully open, according to the boosting time and valve opening.

[0077] In the embodiment of the present invention, when the automatic boost command is true in the first rate output unit, the start-stop stack inlet valve control command satisfies the first boost preset requirement and the second boost preset requirement respectively according to the size relationship between the target pressure value and the first intermediate target pressure value, thereby realizing staged boost control. This staged control method can more reasonably adjust the valve opening according to the characteristics of the system at different pressure stages, making the boost process more stable and efficient, which helps to improve the overall performance of the system. When the automatic boost command is true and the pressure value output by the target pressure unit meets the corresponding conditions, the first rate output unit can quickly switch from output In1 to In2, and timely adjust the valve control command to meet the boost requirement, thereby accelerating the boost speed of the system, shortening the time for the system to reach the rated pressure, and improving the operating efficiency of the system.

[0078] In one embodiment, the logic configuration of the target pressure unit is as follows: Figure 5 As shown, it includes a second band rate output unit and a third selection unit, wherein:

[0079] When the automatic boost instruction is false, the SW of the corresponding second rate output unit is false, and the pressure value output by the target pressure unit corresponding to the output In1 is equal to the first manually set pressure value. When preparing for boosting, the first manually set pressure value = the first preset initial pressure value; when preparing for boosting, the first manually set pressure value can be set to the first preset initial pressure value. The operator can flexibly adjust the initial pressure according to the actual situation, which provides convenience for different starting conditions and system requirements, and ensures that the system can start the boost process in a suitable initial state.

[0080] When the automatic boost instruction is true, SW of the second rate output unit is true, and the output value of the target pressure unit switches from In1 to In2 based on the first preset rate within the preset boost time, and In2 corresponds to the first preset rated pressure value; during the boost process, the output value of the target pressure unit is input through In2 of the third selection unit and the first manually set pressure value is input through In1 of the third selection unit, so as to automatically track the real-time output value of the target pressure unit with the first manually set pressure value in real time, and when the output value of the target pressure unit rises to the first preset rated pressure value, the automatic boost instruction is reset to false, and the corresponding third selection unit SW is false, and In1 of the second rate output unit outputs the output value of the target pressure unit equal to the first manually set pressure value.

[0081] During the pressure boosting process in the embodiment of the present invention, the cooperation between the third selection unit and the fourth selection unit enables the first manually set pressure value to automatically track the output value of the real-time target pressure unit in real time, ensuring that the manually set pressure value is consistent with the target pressure in the automatic pressure boosting process, avoiding conflicts and pressure fluctuations between manual and automatic control, and achieving a smooth transition between manual control and automatic control, so that the system can operate stably in different control modes.

[0082] In one embodiment, the logic configuration of the bypass valve pressure control module is as follows: Figure 6 As shown, it includes a third band rate output unit and a fourth selection unit, wherein:

[0083] In the initial state, when the automatic pressure increase instruction is false, the third belt rate output unit outputs In1, and the corresponding bypass valve pressure setting value is equal to the second manually set pressure value, and the second manually set pressure value is equal to the second preset initial pressure value, for example 5.2MPa.

[0084] When the automatic boost command is true, SW of the third rate output unit is true, and the bypass valve pressure setting value is switched from In1 to In2 based on a second preset rate (eg, 0.067 MPa / min within 90 min) within the preset boost time.

[0085] During the pressure boosting process, the bypass valve pressure setting value is tracked in real time through the In2 input of the fourth selection unit, and the second manually set pressure value is input through the In1 input of the fourth selection unit, so as to automatically track the bypass valve pressure setting value in real time with the second manually set pressure value. When the output value of the target pressure unit rises to the second preset rated pressure value (11.2MPa), the automatic pressure boosting instruction is reset to false, and the corresponding fourth selection unit SW=false, and the bypass valve pressure setting value output by In1 of the second belt rate output unit is equal to the second manually set pressure value.

[0086] In the embodiment of the present invention, during the boosting process, the fourth selection unit enables the second manually set pressure value to automatically track the bypass valve pressure setting value in real time, avoiding the deviation between the manually set pressure value and the bypass valve pressure setting value during the automatic boosting process, and preventing system fluctuations or abnormalities caused by inconsistent pressures. When the output value of the target pressure unit rises to the preset rated pressure value and the automatic boosting instruction is reset to false, the fourth selection unit SW=false, and the In1 output bypass valve pressure setting value of the third belt rate output unit is equal to the second manually set pressure value. This process realizes the automatic reset of the bypass valve pressure control after the boosting is completed, stabilizes the bypass valve pressure at the appropriate manually set value, ensures that the system can run smoothly after the boosting is completed, and avoids the impact of sudden pressure changes on the system.

[0087] In one embodiment, the valve pressure control module, such as Figure 7 As shown, it includes a PID controller and a multiplier. The pressure value output by the target pressure unit and the preset pressure setting rate are input into the multiplier to obtain the pressure setting value, and the pressure setting value and the actual value of the steam pressure before the machine are input into the PID controller to generate a regulating valve pressure control instruction. When the deviation between the pressure setting value and the actual pressure value is greater than the preset percentage of the rated pressure, the control pressure control mode automatically exits to the valve control mode.

[0088] Specifically, the pressure set value is equal to the preset pressure set rate * the rate of the second rate output unit * the pressure value output by the target pressure unit. By setting the pressure set change rate, the speed of change of the pressure set value can be flexibly adjusted according to actual needs. For example, under different working conditions, such as system startup, stable operation or shutdown, the pressure set value can be changed quickly or slowly according to specific requirements to meet the system's different precision requirements for pressure control. At the same time, combined with the second rate output unit rate, the control of the pressure set value is further refined. On the basis of the pressure set change rate, the rate of pressure change can be more accurately fine-tuned according to the real-time status of the system, making the pressure control smoother and more stable, helping to avoid sudden changes or fluctuations in pressure and improving the stability and reliability of the system.

[0089] The embodiment of the present invention uses a PID controller to automatically adjust the control parameters according to the deviation between the real-time pressure set value and the actual pressure value, so that the valve pressure can quickly and stably reach and remain near the set value, ensuring the accuracy and stability of the system pressure and meeting the pressure requirements under different working conditions. When the deviation between the pressure set value and the actual pressure value is greater than 50% of the rated pressure, the pressure control mode can be automatically controlled to exit to the valve control mode, providing a strong guarantee for the safe and stable operation of the system.

[0090] In order to switch to steam main pipeline operation, the device provided by the embodiment of the present invention also includes: a starting stack cut-off module, which is used to control the start-stop stack system inlet regulating valve to be fully opened, and control the pre-start valve of the conventional island side isolation valve on the steam main pipeline to open for pipe warming when the steam pressure before the machine stops rising to a first preset rated pressure value, the bypass valve pressure setting value reaches a second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches a preset opening, and control the conventional island side isolation valve on the steam main pipeline to be fully opened and the pre-start valve of the conventional island side isolation valve on the steam main pipeline to be closed after a preset delay, and interlock and close the start-stop stack inlet isolation valve after the conventional island side isolation valve on the main pipeline is fully opened.

[0091] The startup stack cut-off module in the embodiment of the present invention performs subsequent operations only when the three conditions that the steam pressure in front of the machine rises to a preset rated pressure value, the bypass valve pressure setting value reaches a second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches a preset opening are met at the same time, ensuring that the system is in a stable and appropriate state before the startup stack cut-off operation is performed, so that the switching process from the startup mode to the normal operation mode is smoother, avoiding system shocks caused by pressure fluctuations or uncoordinated valve operation, and ensuring the stability and reliability of the entire system; in a specific order, the start-stop stack system inlet regulating valve is fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline is opened, the conventional island side isolation valve on the steam main pipeline is fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline is closed, and the start-stop stack inlet isolation valve is interlocked and closed. This orderly valve operation can achieve a smooth transition between the startup stack and the main system, making the transition of the system operation state smoother, reducing interference with the operation of the entire system, and ensuring the normal operation of the system.

[0092] In one embodiment, if Figure 8 As shown, after the opening of the start-stop stack inlet regulating valve is greater than 90%, open the pre-start valve of the conventional island side isolation valve on the main pipeline; after 120 minutes, open the conventional island side isolation valve on the main pipeline, and interlock and close the pre-start valve of the conventional island side isolation valve on the main pipeline; after the conventional island side isolation valve on the main pipeline is fully opened, interlock and close the start-stop stack inlet isolation valve, and cut the steam to the main pipeline for operation.

[0093] Before fully opening the conventional island-side isolation valve on the steam main pipeline, open the pre-start valve to warm up the pipe and delay for 120 minutes. This process can effectively avoid thermal stress and water hammer caused by rapid temperature changes in the pipeline, prevent safety problems such as pipeline damage, rupture or leakage, ensure the safe operation of the pipeline system, and also create safety conditions for the subsequent full opening of the main isolation valve. After the conventional island-side isolation valve on the pipeline is fully opened, the start-stop stack inlet isolation valve is interlocked and closed. This interlocking mechanism can prevent accidental intervention or reverse flow of the start-up stack system when the main system is operating normally, avoid safety risks caused by misoperation or system abnormalities, and provide double protection for the safe and stable operation of the system.

[0094] The embodiment of the present invention further provides a method for automatically controlling steam pressure increase of a high temperature gas-cooled reactor steam turbine, based on the device in the above embodiment, comprising:

[0095] S1, obtaining a first preset initial pressure value, a first preset rated pressure value and a pressure increase time for automatic pressure increase of a high temperature gas-cooled reactor steam turbine;

[0096] S2, triggering an automatic pressure increase instruction based on a first preset initial pressure value and a preset automatic pressure increase condition, and triggering an automatic pressure increase stop instruction when the steam pressure in front of the machine reaches a first preset rated pressure value;

[0097] S3, generating a start-stop stack inlet valve regulating instruction based on the first preset initial pressure value, the first preset rated pressure value, the boosting requirement determined by the boosting time, and the instruction generated by the automatic boosting control module;

[0098] S4, generating a bypass valve pressure control instruction based on a second preset initial pressure value, a second preset rated pressure value, a boost requirement determined by the boost time, and an instruction generated by an automatic boost control module, wherein the second preset initial pressure value is greater than the first preset initial pressure value, and the second preset rated pressure value is greater than the first preset rated pressure value;

[0099] S5, generating a regulating valve pressure control instruction based on the real-time pressure set value during the pressure boosting process and the actual value of the steam pressure in front of the machine.

[0100] The method provided by the embodiment of the present invention can set clear goals and time plans for the entire boosting process by obtaining the initial pressure value, the preset rated pressure value and the boosting time. According to these parameters, the steam pressure rising process can be accurately controlled, so that the pressure rises steadily at a preset rate, and finally accurately reaches the preset rated pressure value, meeting the precise requirements of the steam pressure for stable operation of the steam turbine, and generating the start-stop stack inlet valve control instructions, bypass valve pressure control instructions and valve control pressure control instructions based on different conditions and requirements, respectively, to achieve precise control of multiple key valves. Each valve works in coordination with each other according to its own instructions, and can more finely adjust the flow and pressure of the steam, ensuring the accuracy and stability of the entire boosting process.

[0101] In order to switch to the steam main pipeline operation, the above control method also includes: when the steam pressure in front of the machine rises to a preset first preset rated pressure value, the bypass valve pressure setting value reaches a second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches a preset opening, the start-stop stack system inlet regulating valve is controlled to be fully opened, and the conventional island side isolation valve pre-start valve on the steam main pipeline is controlled to be opened for pipe warming, and after a delay of a preset time, the conventional island side isolation valve on the steam main pipeline is controlled to be fully opened, the conventional island side isolation valve pre-start valve on the steam main pipeline is closed, and the start-stop stack inlet isolation valve is interlocked and closed after the conventional island side isolation valve on the main pipeline is fully opened.

[0102] In the embodiment of the present invention, the subsequent operation is performed only after the steam pressure in front of the machine, the bypass valve pressure setting value and the opening of the start-stop system inlet regulating valve reach the corresponding preset values, which can ensure the stability of steam pressure and flow; the conventional island-side isolation valve pre-start valve on the steam main pipeline is controlled to open for pipe warming, and the delay is 120 minutes, so that the steam main pipeline can be evenly heated, ensuring that the temperature of each part of the pipeline gradually rises and reaches a uniform distribution, and the start-stop system inlet regulating valve is controlled to be fully opened, as well as the subsequent operation of the conventional island-side isolation valve on the steam main pipeline, so as to realize the orderly switching from the start-stop stage to the normal operation stage. This orderly switching ensures the continuity and stability of steam supply, so that the system can smoothly transition from one operating state to another, reducing interference with the operation of the entire system; after the conventional island-side isolation valve on the main pipeline is fully opened, the start-stop stack inlet isolation valve is interlocked and closed, forming a reliable interlock control mechanism to prevent misoperation, ensuring that the start-stop stack inlet isolation valve is closed in time after the steam main pipeline is operating normally, avoiding steam backflow or other abnormal situations, and enhancing the overall reliability and safety of the system.

[0103] 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 defined by the appended claims.

Claims

1. A steam automatic pressure-increasing control device for a high-temperature gas-cooled reactor steam turbine, characterized in that: include: An automatic pressure-boosting control module, configured to trigger an automatic pressure-boosting instruction when a first preset initial pressure value and a preset automatic pressure-boosting condition are met, and trigger an automatic pressure-boosting stop instruction when the steam pressure in front of the machine reaches a first preset rated pressure value; A start-up stack system inlet valve regulating control module is used to generate a start-stop stack inlet valve regulating instruction based on the first preset initial pressure value, the first preset rated pressure value, the boosting requirement determined by the boosting time, and the instruction generated by the automatic boosting control module; a bypass valve pressure control module, configured to generate a bypass valve pressure control instruction based on a preset manual pressure set value, a second preset initial pressure value, a second preset rated pressure value, a boost requirement determined by a boost time, and an instruction generated by the automatic boost control module, wherein the second preset initial pressure value is greater than the first preset initial pressure value, and the second preset rated pressure value is greater than the first preset rated pressure value; The regulating valve pressure control module is used to generate a regulating valve pressure control instruction based on a real-time pressure set value during the pressure boosting process and an actual value of the steam pressure in front of the machine, wherein the real-time pressure set value is between a first preset initial pressure value and a first preset rated pressure value.

2. The device according to claim 1, characterized in that Also includes: The starting stack cutting module is used to control the start-stop stack system inlet regulating valve to be fully opened, and the conventional island side isolation valve pre-start valve on the steam main pipeline to be opened for pipe warming when the steam pressure before shutdown rises to the first preset rated pressure value, the bypass valve pressure setting value reaches the second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches the preset opening, and control the conventional island side isolation valve on the steam main pipeline to be fully opened and the conventional island side isolation valve pre-start valve on the steam main pipeline to be closed after a preset delay, and interlock and close the start-stop stack inlet isolation valve after the conventional island side isolation valve on the main pipeline is fully opened.

3. The device according to claim 1 or 2, characterized in that: The automatic voltage boost control module includes: an automatic voltage boost condition configuration unit, a trigger unit, and an automatic voltage boost stop configuration unit, wherein: The automatic voltage boost condition configuration unit is used to perform a logical AND operation on the first preset initial pressure value and the preset automatic voltage boost condition, and generate a trigger signal when both the first preset initial pressure value and the preset automatic voltage boost condition are met, and input the trigger unit S terminal after maintaining the preset time, so as to trigger the automatic voltage boost instruction to be true; The automatic boost stop configuration unit is used to generate a signal and input it into the trigger unit R terminal when the pressure value output by the target pressure subunit is equal to the first preset rated pressure value, so as to trigger the falling edge of the automatic boost instruction to be true, indicating the generation of the automatic boost stop instruction; The R end of the trigger unit is false in the initial state. When the first preset initial pressure value and the preset automatic boost condition are all true, the automatic boost instruction is true; when the target pressure subunit is equal to the first preset rated pressure value, the automatic boost instruction is false, and the falling edge of the automatic boost instruction is true.

4. The device according to claim 1 or 2, characterized in that: The startup stack system inlet valve control module includes: a first selection unit, a second selection unit and a first belt rate output unit, wherein: The first selection unit, in the initial state, when the automatic boost command is false, SW=false, outputs In1, the corresponding start-stop stack inlet regulating valve command is the preset manual input value, when the automatic boost command falls to true, after a preset delay time, SW=true, outputs In2, and the corresponding start-stop stack inlet regulating valve opening is fully open; The second selection unit, in the initial state, SW=true, outputs In2, at which time the rate RT of the first rate output unit is equal to the first preset rate value; The first rate output unit, in the initial state, SW=false, outputs In1, and the corresponding start-stop stack inlet valve regulating instruction is the preset manual input value. When the automatic pressure boost instruction is true and the pressure value output by the target pressure unit is less than the first intermediate target pressure value, SW=true, the output switches from In1 to In2, and the corresponding start-stop stack inlet valve regulating instruction meets the first pressure boost preset requirement; when the automatic pressure boost instruction is true and the target pressure is greater than the first intermediate target pressure value, the output switches from In1 to In2, and the corresponding start-stop stack inlet valve regulating instruction meets the second pressure boost preset requirement.

5. The device according to claim 4, characterized in that The target pressure unit includes a second belt speed output unit and a third selection unit, wherein: When the automatic pressure increase instruction is false, the corresponding SW of the second belt rate output unit is false, and the pressure value output by the target pressure unit corresponding to the output In1 is equal to the first manually set pressure value. When preparing to increase the pressure, the first manually set pressure value = the first preset initial pressure value; When the automatic boost instruction is true, SW of the second rate output unit is true, and the output value of the target pressure unit switches from In1 to In2 based on the first preset rate within the preset boost time, and In2 corresponds to the first preset rated pressure value; during the boost process, the output value of the target pressure unit is input through In2 of the third selection unit and the first manually set pressure value is input through In1 of the third selection unit, so as to automatically track the real-time output value of the target pressure unit with the first manually set pressure value in real time, and when the output value of the target pressure unit rises to the first preset rated pressure value, the automatic boost instruction is reset to false, and the corresponding third selection unit SW is false, and In1 of the second rate output unit outputs the output value of the target pressure unit equal to the first manually set pressure value.

6. The device according to claim 1 or 2, characterized in that: The bypass valve pressure control module includes a third belt speed output unit and a fourth selection unit, wherein: The third belt speed output unit is in the initial state, when the automatic pressure increase instruction is false, outputs In1, and the corresponding bypass valve pressure setting value is equal to the second manually set pressure value, and the second manually set pressure value is equal to the second preset initial pressure value; When the automatic boost command is true, SW of the third belt rate output unit = true, and the bypass valve pressure setting value switches from In1 to In2 based on the rate of the second preset rate within the preset boost time; During the boosting process, the bypass valve pressure setting value is tracked in real time through the In2 input of the fourth selection unit, and the second manually set pressure value is input through the In1 input of the fourth selection unit, so as to automatically track the bypass valve pressure setting value in real time with the second manually set pressure value. When the output value of the target pressure unit rises to the second preset rated pressure value, the automatic boost instruction is reset to false, and the corresponding fourth selection unit SW=false, and the bypass valve pressure setting value output by In1 of the second belt rate output unit is equal to the second manually set pressure value.

7. The device according to claim 5, characterized in that The valve regulating pressure control module includes a PID controller and a multiplier. The pressure value output by the target pressure unit and a preset pressure given rate are input into the multiplier to obtain a pressure given value, and the pressure given value and the actual value of the steam pressure before the machine are input into the PID controller to generate a valve regulating pressure control instruction. When the deviation between the pressure given value and the actual pressure value is greater than a preset percentage of the rated pressure, the pressure control mode is controlled to automatically exit from the valve control mode.

8. The device according to claim 1, characterized in that The preset automatic voltage boost condition includes: The nuclear power, feed water flow, and helium flow have reached their respective trigger thresholds, the DEH pressure control mode and automatic boost button have been put into operation, the start-stop reactor inlet regulating valve is in manual state and the opening is greater than the preset trigger threshold, and the bypass valve is in automatic state and the pressure value is greater than the preset pressure threshold.

9. A method for controlling automatic steam pressure increase of a high temperature gas-cooled reactor steam turbine, characterized in that: Based on the device according to any one of claims 1 to 8, the method comprises: Obtaining a first preset initial pressure value, a first preset rated pressure value and a pressure increase time for automatic pressure increase of a high temperature gas-cooled reactor steam turbine; triggering an automatic pressure increase instruction based on a first preset initial pressure value and a preset automatic pressure increase condition, and triggering an automatic pressure increase stop instruction when the steam pressure in front of the machine reaches a first preset rated pressure value; Generate a start-stop stack inlet valve regulating instruction based on the first preset initial pressure value, the first preset rated pressure value, the boosting requirement determined by the boosting time, and the instruction generated by the automatic boosting control module; generating a bypass valve pressure control instruction based on a second preset initial pressure value, a second preset rated pressure value, a boost requirement determined by a boost time, and an instruction generated by the automatic boost control module, wherein the second preset initial pressure value is greater than the first preset initial pressure value, and the second preset rated pressure value is greater than the first preset rated pressure value; The regulating valve pressure control instruction is generated based on the real-time pressure set value during the pressure boosting process and the actual value of the steam pressure in front of the machine.

10. The method according to claim 9, characterized in that Also includes: When the steam pressure in front of the machine rises to the preset first preset rated pressure value, the bypass valve pressure setting value reaches the second preset rated pressure value, and the start-stop stack system inlet regulating valve reaches the preset opening, the start-stop stack system inlet regulating valve is controlled to be fully opened, and the pre-start valve of the conventional island side isolation valve on the steam main pipeline is controlled to be opened for pipe warming, and after a preset delay, the conventional island side isolation valve on the steam main pipeline is controlled to be fully opened, the pre-start valve of the conventional island side isolation valve on the steam main pipeline is closed, and the start-stop stack inlet isolation valve is interlocked and closed after the conventional island side isolation valve on the main pipeline is fully opened.

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