Main Feed Water Control Valve Control Method, Device and Equipment for Steam Generator

Abstract

The present application relates to a control method, device and equipment for the main feed water regulating valve of a steam generator. The method includes: sending an opening signal to the main feed water regulating valve corresponding to the steam generator, so as to obtain the response information of the main feed water regulating valve under the opening signal, and adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information, so as to control the working condition of the main feed water regulating valve. Since different opening signals can be sent to the main feed water regulating valve, the response information of the main feed water regulating valve under different opening signals can be obtained, and the characteristic parameters of the main feed water regulating valve can be adjusted by comparing the response information with the reference index corresponding to the response information, thereby improving the working stability of the main feed water regulating valve of the steam generator and enabling the nuclear power unit to operate safely and stably.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear power control, and particularly to a control method, device, and equipment for a main feed water regulating valve of a steam generator. Background Art

[0002] The steam generator is one of the necessary equipment for nuclear power units to carry out nuclear power operations. After the heat generated by the nuclear reactor is transferred to the steam generator, steam is generated by the steam generator, and thus the generated steam can drive the steam turbine generator to generate electricity. However, at present, the main feed water regulating valve of the steam generator has an unstable working condition, which affects the safe and stable operation of the nuclear power unit.

[0003] Therefore, how to improve the working stability of the main feed water regulating valve of the steam generator, so that the nuclear power unit can operate safely and stably, has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a control method, device, and equipment for a main feed water regulating valve of a steam generator that can improve the working stability of the main feed water regulating valve of the steam generator.

[0005] In a first aspect, the present application provides a control method for a main feed water regulating valve of a steam generator, including:

[0006] Sending an opening signal to the main feed water regulating valve corresponding to the steam generator;

[0007] Obtaining the response information of the main feed water regulating valve under the opening signal;

[0008] Based on the response information and the reference index corresponding to the response information, adjusting the characteristic parameters of the main feed water regulating valve to control the working condition of the main feed water regulating valve.

[0009] In one embodiment, when the sending opening signal is a first opening signal whose signal change amplitude is less than a preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal and the first response duration of the actual opening change value.

[0010] In one embodiment, the reference index corresponding to the actual opening change value is the product result of the follow-up coefficient and the first opening signal, and the reference index corresponding to the first response duration is the first reference response duration. Based on the response information and the reference index corresponding to the response information, adjusting the characteristic parameters of the main feed water regulating valve includes:

[0011] When the actual opening degree change value is less than the product result, and / or, the first response duration of the first preset multiple is greater than the first reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0012] In one embodiment, when the opening signal is a second opening signal with a signal change amplitude greater than a preset change amplitude, the response information includes the overshoot amount of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening degree change value under the second opening signal.

[0013] In one embodiment, the reference index corresponding to the overshoot amount is the reference overshoot amount, and the reference index corresponding to the second response duration is the second reference response duration. Adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information includes:

[0014] When the overshoot amount is greater than the reference overshoot amount, and / or, the second response duration of the second preset multiple is greater than the second reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0015] In one embodiment, when the opening signal is a third opening signal at which the main feed water regulating valve is fully open, the response information includes the third response duration of the actual opening degree change value of the main feed water regulating valve under the third opening signal; when the opening signal is a fourth opening signal at which the main feed water regulating valve is fully closed, the response information includes the fourth response duration of the actual opening degree change value of the main feed water regulating valve under the fourth opening signal.

[0016] In one embodiment, the reference index corresponding to the third response duration is the third reference response duration, and the reference index corresponding to the fourth response duration is the fourth reference response duration. Adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information includes:

[0017] When the third response duration is greater than the third reference response duration, and / or, the fourth response duration is greater than the fourth reference duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation.

[0018] In a second aspect, the present application also provides a control device for the main feed water regulating valve of a steam generator, including:

[0019] A sending module, configured to send an opening signal to the main feed water regulating valve corresponding to the steam generator;

[0020] An obtaining module, configured to obtain the response information of the main feed water regulating valve under the opening signal;

[0021] An adjusting module, configured to adjust the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information, so as to control the working condition of the main feed water regulating valve.

[0022] In a third aspect, the present application further provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the above method are implemented.

[0023] In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above method are implemented.

[0024] In a fifth aspect, the present application further provides a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the above method are implemented.

[0025] For the main feed water regulating valve control method, device and equipment of the above steam generator, an opening signal is sent to the main feed water regulating valve corresponding to the steam generator, so that the response information of the main feed water regulating valve under the opening signal can be obtained, and based on the response information and the reference index corresponding to the response information, the characteristic parameters of the main feed water regulating valve are adjusted to control the working condition of the main feed water regulating valve. Since different opening signals can be sent to the main feed water regulating valve, the response information of the main feed water regulating valve under different opening signals can be obtained, and the characteristic parameters of the main feed water regulating valve can be adjusted by comparing the response information with the reference index corresponding to the response information, thereby improving the working stability of the main feed water regulating valve of the steam generator and enabling the nuclear power unit to operate safely and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of the unstable operation of the main feed water regulating valve of the steam generator in an embodiment;

[0028] Figure 2Schematic diagram of the main feed water regulating valve regulating system and the feed water pump speed regulating system in an embodiment;

[0029] Figure 3 Application environment diagram of the main feed water regulating valve control method for a steam generator in an embodiment;

[0030] Figure 4 Flow schematic diagram of the main feed water regulating valve control method for a steam generator in an embodiment;

[0031] Figure 5 One of the schematic diagrams of characteristic parameter regulation in an embodiment;

[0032] Figure 6 Another schematic diagram of characteristic parameter regulation in an embodiment;

[0033] Figure 7 The third schematic diagram of characteristic parameter regulation in an embodiment;

[0034] Figure 8 The fourth schematic diagram of characteristic parameter regulation in an embodiment;

[0035] Figure 9 The fifth schematic diagram of characteristic parameter regulation in an embodiment;

[0036] Figure 10 The sixth schematic diagram of characteristic parameter regulation in an embodiment;

[0037] Figure 11 The seventh schematic diagram of characteristic parameter regulation in an embodiment;

[0038] Figure 12 Schematic diagram of the main feed water regulating valve control for a steam generator in an embodiment;

[0039] Figure 13 Comparison chart of the response curves before and after optimization in an embodiment;

[0040] Figure 14 Structure block diagram of the main feed water regulating valve control device for a steam generator in an embodiment;

[0041] Figure 15 Internal structure diagram of a computer device in an embodiment. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further elaborates on the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] The steam generator is one of the necessary equipment for nuclear power units to carry out nuclear power operations. After the heat generated by the nuclear reactor is transferred to the steam generator, steam is generated by the steam generator. Thus, the generated steam can drive the steam turbine generator to generate electricity. However, at present, the main feed water regulating valve of the steam generator has an unstable working condition, which affects the safe and stable operation of the nuclear power unit.

[0044] The main feed water regulating valve of the steam generator has an unstable working condition. For example, Figure 1 as shown, it shows the main feed water regulating valve for the water level control of the steam generator of the nuclear power unit, which often shows periodic fluctuations and its fluctuation phenomenon. The feed water flow of the steam generator fluctuates, resulting in a change in the opening of the feed water regulating valve. The change in the opening of the feed water regulating valve leads to a change in the steam-water differential pressure, causing the speed regulation of the feed water pump. The change in the speed regulation of the feed water pump leads to a change in the feed water flow, and the deviation of the steam-water flow leads to a change in the opening of the feed water regulating valve. The speed regulation system of the feed water pump and the main / bypass valve regulation system form a coupling, resulting in an adjustment oscillation in the control system, posing challenges to the reliability and durability of the actuator, and at the same time affecting the safe and stable operation of the nuclear power unit.

[0045] The water level control of the steam generator of the nuclear power unit is mainly divided into the main feed water regulating valve regulation system and the feed water pump speed regulation system. For example, Figure 2As shown in the figure. The control of the main feed water regulating valve regulating system is completed by adjusting the feed water flow rate entering the steam generator. Each steam generator's normal feed water circuit is provided with two parallel pipelines: the main feed water regulating valve on the main pipeline is used for water level regulation under high load operating conditions, and the bypass regulating valve on the bypass pipeline is applied to operating conditions during low load and start-up and shutdown phases; among them, the main feed water regulating valve uses the difference between the steam flow rate at the outlet of the steam generator and the feed water flow rate at the inlet of the steam generator (i.e., the steam-water deviation signal) as the feedforward signal for the open-loop channel, and the difference between the measured water level of the steam generator and the set value (i.e., the water level deviation signal) generates the control signal for the closed-loop channel through the PID (Proportional Integral Derivative) control link. The two signals are then passed through the PI (Proportional Integral) control link to output the opening signal of the main feed water regulating valve. The bypass regulating valve uses the sum of the deviation adjustment amount between the set value of the steam generator water level and the measured value and the feedforward signal of the total steam flow rate as the opening signal of the bypass regulating valve, and is always in the fully open position during the full power stage and does not participate in the regulation. According to the in-depth analysis of the multi-site nuclear power unit, the fundamental reason for the periodic fluctuation of the main feed water regulating valve of the steam generator is the mutual coupling between the main feed water regulating valve regulating system and the feed pump speed regulating system, and the main reason for the formation of the coupling is that the regulating characteristic time of the main feed water regulating valve is close to the regulating characteristic time of the feed pump speed. Therefore, the main measure to solve the fluctuation of the main feed water regulating valve is to break the mutual coupling between the main feed water regulating valve regulating system and the feed pump speed regulating system. Therefore, a method for setting the regulating characteristics of the water level actuator of the steam generator of a nuclear power unit is proposed to reduce the periodic fluctuation amplitude of the main feed water regulating valve of the steam generator. The feed pump speed regulating system adjusts the control speed of the scoop tube position according to the control signal to maintain the pressure difference between the feed water main pipe and the steam main pipe of the steam generator equal to a set value that changes with the load, so as to maintain the pressure difference before and after the regulating valve of the feed water flow control system approximately constant, thereby eliminating the coupling influence of the feed water between the three steam generators and meeting the water supply flow requirements of the steam generator. The feed water main pipes of the three steam generators are shared. If only the water level of one steam generator deviates from the set value and the opening of the feed water regulating valve needs to be changed to change the feed water flow rate, it will cause a change in the pressure of the feed water main pipe. Among them, in the figure is the water level of the steam generator, is the steam flow rate, is the feed water flow rate, is the steam pressure, is the feed water temperature, is the mirror image load of the secondary circuit, is the steam-water pressure difference.

[0046] In summary, how to improve the working stability of the main feed water regulating valve of the steam generator, so that the nuclear power unit can operate safely and stably, has become an urgent problem to be solved by the personnel in this field.

[0047] In view of the above problems, the main feed water regulating valve control method for a steam generator provided by an embodiment of the present application can be applied to, for example, Figure 1 the application environment shown. Among them, the control device 301 can send an opening signal to the main feed water regulating valve corresponding to the steam generator, then obtain the response information of the main feed water regulating valve 302 under the opening signal, and adjust the characteristic parameters of the main feed water regulating valve according to the response information and the reference index corresponding to the response information to control the working condition of the main feed water regulating valve.

[0048] In an exemplary embodiment, as shown in Figure 4 the following, a main feed water regulating valve control method for a steam generator is provided. Taking the control device 301 in Figure 1 as an example, the method includes the following steps:

[0049] S401. Send an opening signal to the main feed water regulating valve corresponding to the steam generator.

[0050] Among them, the opening signal can be a first opening signal with a signal change amplitude less than a preset change amplitude, a second opening signal with a signal change amplitude greater than the preset change amplitude, a third opening signal with the main feed water regulating valve fully open, or a fourth opening signal with the main feed water regulating valve fully closed.

[0051] In an embodiment of the present application, at least one of a first opening signal with a signal change amplitude less than a preset change amplitude, a second opening signal with a signal change amplitude greater than the preset change amplitude, a third opening signal with the main feed water regulating valve fully open, and a fourth opening signal with the main feed water regulating valve fully closed can be sent to the main feed water regulating valve corresponding to the steam generator.

[0052] S402. Obtain the response information of the main feed water regulating valve under the opening signal.

[0053] In an embodiment of the present application, after sending the above opening signal, the response information of the main feed water regulating valve under the opening signal can be obtained.

[0054] Exemplarily, if a first opening signal with a signal change amplitude less than a preset change amplitude is sent to the main feed water regulating valve corresponding to the steam generator, the actual opening change value under the first opening signal and the first response duration of the actual opening change value can be obtained. If a second opening signal with a signal change amplitude greater than the preset change amplitude is sent to the main feed water regulating valve corresponding to the steam generator, the overshoot amount and the second response duration under the second opening signal can be obtained.

[0055] S403. Based on the response information and the reference index corresponding to the response information, adjust the characteristic parameters of the main feed water regulating valve to control the working condition of the main feed water regulating valve.

[0056] In the embodiment of the present application, the response information can be compared with the reference index corresponding to the response information to obtain a comparison result. Based on the comparison result, it is determined whether the working condition of the main feed water regulating valve is stable and whether to adjust the characteristic parameters of the main feed water regulating valve. If adjustment is required, the characteristic parameters of the main feed water regulating valve are adjusted, thereby controlling the working condition of the main feed water regulating valve. The characteristic parameters are, for example, proportional gain, speed gain, and minimum loop gain.

[0057] Alternatively, it can be determined whether the response information meets the reference index corresponding to the response information. If the response information does not meet the reference index corresponding to the response information, it is determined to adjust the characteristic parameters of the main feed water regulating valve and adjust the characteristic parameters of the main feed water regulating valve. Correspondingly, if the response information meets the reference index corresponding to the response information, no adjustment is required.

[0058] In the above method for controlling the main feed water regulating valve of the steam generator, an opening signal is sent to the main feed water regulating valve corresponding to the steam generator, so that the response information of the main feed water regulating valve under the opening signal can be obtained, and based on the response information and the reference index corresponding to the response information, the characteristic parameters of the main feed water regulating valve are adjusted to control the working condition of the main feed water regulating valve. Since different opening signals can be sent to the main feed water regulating valve, the response information of the main feed water regulating valve under different opening signals is obtained, and the characteristic parameters of the main feed water regulating valve are adjusted by comparing the response information with the reference index corresponding to the response information, thereby improving the working stability of the main feed water regulating valve of the steam generator and enabling the nuclear power unit to operate safely and stably.

[0059] The characteristic parameters of the main feed water regulating valve can be adjusted based on the response information and the reference index corresponding to the response information in the following three ways.

[0060] First, a first opening signal with a signal change amplitude smaller than a preset change amplitude can be sent to the main feed water regulating valve. When the sent opening signal is the first opening signal with a signal change amplitude smaller than the preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal and the first response duration of the actual opening change value.

[0061] Among them, the preset change amplitude can be an amplitude less than 25%.

[0062] Specifically, when a first opening signal with a signal change amplitude smaller than the preset change amplitude is sent to the main feed water regulating valve, the actual opening change value of the main feed water regulating valve under the first opening signal and the first response duration of the actual opening change value, that is, the response duration of the opening signal corresponding to the actual opening change value, can be obtained.

[0063] In one embodiment, this embodiment relates to a possible implementation method of adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information, when the reference index corresponding to the actual opening degree change value is the product of the follow-up coefficient and the first opening degree signal, and the reference index corresponding to the first response duration is the first reference response duration. The above S403 includes:

[0064] When the actual opening degree change value is less than the product result, and / or, the first response duration of the first preset multiple is greater than the first reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of the proportional gain, the speed gain, and the minimum loop gain.

[0065] Among them, the first reference response duration may be the standard response duration under the first opening degree signal when a first opening degree signal with a signal change amplitude less than the preset change amplitude is sent to the main feed water regulating valve. The first preset multiple may be 0.632.

[0066] Specifically, if the actual opening degree change value is less than the product result, and / or, the first response duration of the first preset multiple is greater than the first reference response duration, it can be explained that the operation of the main feed water regulating valve is unstable and needs to be adjusted. At this time, at least one of the proportional gain, the speed gain, and the minimum loop gain of the main feed water regulating valve can be adjusted. It should be noted that when adjusting at least two of the proportional gain, the speed gain, and the minimum loop gain of the main feed water regulating valve, the two / three characteristic parameters can be adjusted in a matching manner.

[0067] For example, if the following formula is not satisfied, adjustment is performed:

[0068]

[0069]

[0070] Among them, represents the actual opening degree change value of the main feed water regulating valve under the first opening degree signal, represents the follow-up coefficient, represents the first opening degree signal with a signal change amplitude less than the preset change amplitude. represents the first response duration of the first preset multiple, represents the first reference response duration.

[0071] In the case where the above formula is not satisfied, at least one of the proportional gain, the speed gain, and the minimum loop gain can be adjusted, such as Figure 5 、 Figure 6 and Figure 7 as shown in the characteristic parameter adjustment schematic diagram, Figure 5 、 Figure 6 andFigure 7 It shows the relationship between the opening signal corresponding to the actual opening change value at different times and the first opening signal (command signal) when adjusting three characteristic parameters.

[0072] In this embodiment, a first opening signal with a signal change amplitude smaller than a preset change amplitude can be sent to the main feed water regulating valve, so that the actual opening change value after the main feed water regulating valve receives this first opening signal and the first response duration of the actual opening change value can be obtained. The actual opening change value and the first response duration can reflect the working stability of the main feed water regulating valve. Furthermore, subsequently, according to whether the actual opening change value and the first response duration meet the corresponding reference indicators, the characteristic parameters of the main feed water regulating valve are adjusted. The response characteristic optimization with good small-signal followability can be realized.

[0073] Second, in the case where the opening signal is a second opening signal with a signal change amplitude greater than the preset change amplitude, the response information includes the overshoot of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening change value under the second opening signal.

[0074] Among them, for the second opening signal with a signal change amplitude greater than the preset change amplitude, the preset change amplitude can be a 25% step change, such as 0%, 25%, 50%, 75%, 100%.

[0075] Specifically, when a second opening signal with a signal change amplitude greater than the preset change amplitude is sent to the main feed water regulating valve, the overshoot of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening change value under the second opening signal can be obtained, that is, the response duration of the opening signal corresponding to the actual opening change value.

[0076] In one embodiment, when the reference index corresponding to the overshoot is the reference overshoot and the reference index corresponding to the second response duration is the second reference response duration, a possible implementation manner of how to adjust the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information is as follows. The above S403 includes:

[0077] When the overshoot is greater than the reference overshoot and / or the second response duration of the second preset multiple is greater than the second reference response duration, the characteristic parameters of the main feed water regulating valve are adjusted; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0078] Among them, the second reference response duration can be the standard response duration under the second opening signal when a second opening signal with a signal change amplitude greater than the preset change amplitude is sent to the main feed water regulating valve. The second preset multiple can be 0.632. The reference overshoot can be the overshoot standard value.

[0079] Specifically, if the overshoot of the main feed water regulating valve under the second opening signal is greater than the reference overshoot, and / or the second response duration of the second preset multiple is greater than the second reference response duration, it can be indicated that the operation of the main feed water regulating valve is unstable and needs to be adjusted. At this time, at least one of the proportional gain, speed gain, and minimum loop gain of the main feed water regulating valve can be adjusted. It should be noted that when adjusting at least two of the proportional gain, speed gain, and minimum loop gain of the main feed water regulating valve, the two / three characteristic parameters can be adjusted in a matching manner.

[0080] For example, if the following formula is not satisfied, adjustment is carried out:

[0081]

[0082]

[0083] Wherein, represents the overshoot of the main feed water regulating valve under the second opening signal, represents the reference overshoot. At this time, represents the second response duration of the second preset multiple, represents the second reference response duration.

[0084] When the above formula is not satisfied, at least one of the proportional gain, speed gain, and minimum loop gain can be adjusted. As shown in Figure 8 , Figure 9 and Figure 10 in the schematic diagram of characteristic parameter adjustment, Figure 8 , Figure 9 and Figure 10 show the valve strokes at different times when adjusting three characteristic parameters.

[0085] In this embodiment, by sending a second opening signal with a signal change amplitude greater than the preset change amplitude to the main feed water regulating valve, the overshoot after the main feed water regulating valve receives the second opening signal and the overshoot of the main feed water regulating valve under the second opening signal can be obtained. The overshoot and the second response duration can reflect the operation stability of the main feed water regulating valve. Furthermore, subsequently, according to whether the overshoot and the second response duration meet the corresponding reference indicators, the characteristic parameters of the main feed water regulating valve are adjusted. The response characteristic optimization with low large-signal following overshoot can be achieved.

[0086] Thirdly, when the opening signal is the third opening signal at which the main feed water regulating valve is fully open, the response information includes the third response duration of the actual opening change value of the main feed water regulating valve at the third opening signal; when the opening signal is the fourth opening signal at which the main feed water regulating valve is fully closed, the response information includes the fourth response duration of the actual opening change value of the main feed water regulating valve at the fourth opening signal.

[0087] Among them, the third opening signal may be a signal that makes the main feed water regulating valve fully open. The fourth opening signal may be a signal that makes the main feed water regulating valve fully closed.

[0088] Specifically, when sending the third opening signal that makes the main feed water regulating valve fully open to the main feed water regulating valve, the third response duration of the main feed water regulating valve can be obtained, that is, the response duration of the opening signal corresponding to the actual opening change value at the third opening signal. When sending the fourth opening signal that makes the main feed water regulating valve fully closed to the main feed water regulating valve, the fourth response duration of the main feed water regulating valve can be obtained, that is, the response duration of the opening signal corresponding to the actual opening change value at the fourth opening signal.

[0089] In one embodiment, when the reference index corresponding to the third response duration is the third reference response duration and the reference index corresponding to the fourth response duration is the fourth reference response duration, how to adjust the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information includes:

[0090] When the third response duration is greater than the third reference response duration, and / or the fourth response duration is greater than the fourth reference duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of the proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation.

[0091] Specifically, if the third response duration is greater than the third reference response duration, and / or the fourth response duration is greater than the fourth reference duration, it can be indicated that the operation of the main feed water regulating valve is unstable and needs to be adjusted. At this time, at least one of the proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation of the main feed water regulating valve can be adjusted. It should be noted that if at least two characteristic parameters of the main feed water regulating valve are adjusted, matching adjustment of the characteristic parameters can be performed.

[0092] For example, if the following formula is not satisfied, adjustment is performed:

[0093]

[0094]

[0095] Among them, represents the third response duration, represents the fourth response duration. The third reference response duration can be the same as the fourth reference response duration, that is, the full stroke time standard response duration. Then can represent the third reference response duration and the fourth reference response duration.

[0096] When the above formula is not satisfied, at least one of the proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation can be adjusted. As shown in the characteristic parameter adjustment schematic diagram in , the curve of the full stroke time response characteristic setting is shown.

[0097] In this embodiment, when the third response duration is greater than the third reference response duration, and / or the fourth response duration is greater than the fourth reference duration, the characteristic parameters of the main feed water regulating valve can be adjusted; the characteristic parameters include at least one of the proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation. Furthermore, the response characteristic optimization with a fast time characteristic response can be realized.

[0098] Such as Figure 12 shown in the control schematic diagram of the main feed water regulating valve of the steam generator, in order to improve the working stability of the main feed water regulating valve of the steam generator, the characteristic parameters of the main feed water regulating valve can be adjusted based on the response information and the reference index corresponding to the response information through small signal follow-up setting, large signal overshoot setting, and full stroke time response characteristic setting, so as to control the working condition of the main feed water regulating valve. Figure 13 It shows the comparison chart of the water level response curves of the steam generator before optimization (before adjustment) and after optimization (after adjustment) under high load conditions. The response characteristic curve of the actuator (the main feed water regulating valve of the steam generator) can be evaluated, the parameters of the valve actuator can be optimized, the proportional gain, speed gain, and minimum loop gain can be matched and set, and the supply air pressure range can be adjusted and the flow amplifier can be adjusted to achieve the response characteristic optimization in three aspects: good small signal follow-up, low large signal overshoot, and fast time response characteristic, and improve the response and control characteristics of the actuator with both small signals and large signals. From the perspective of the adjustment characteristics of the actuator, the stability of the steam generator water level control under all working conditions is improved. The anti-disturbance ability of the steam generator water level control is effectively improved, the risk of operator manual intervention and the risk of process system protection action are reduced, and thus the safe and stable operation of the nuclear power unit is ensured.

[0099] It should be understood that although the steps in the flowcharts involved in the above embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0100] Based on the same inventive concept, an embodiment of the present application further provides a main feed water regulating valve control device for a steam generator for implementing the main feed water regulating valve control method for the steam generator involved above. The solution provided by this device to solve the problem is similar to the solution recorded in the above method. Therefore, the specific limitations in one or more embodiments of the main feed water regulating valve control device for the steam generator provided below can refer to the limitations on the main feed water regulating valve control method for the steam generator in the above text, and will not be repeated here.

[0101] In an exemplary embodiment, as Figure 14 shown, a main feed water regulating valve control device 1400 for a steam generator is provided, including: a sending module 1401, an obtaining module 1402, and an adjusting module 1403, where:

[0102] The sending module 1401 is configured to send an opening signal to the main feed water regulating valve corresponding to the steam generator.

[0103] The obtaining module 1402 is configured to obtain the response information of the main feed water regulating valve under the opening signal.

[0104] The adjusting module 1403 is configured to adjust the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information, so as to control the working condition of the main feed water regulating valve.

[0105] In an exemplary embodiment, when the sent opening signal is a first opening signal with a signal change amplitude less than a preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal, and the first response duration of the actual opening change value.

[0106] In an exemplary embodiment, the reference index corresponding to the actual opening change value is the product result of the follow-up coefficient and the first opening signal, and the reference index corresponding to the first response duration is the first reference response duration. The adjusting module 1403 includes:

[0107] The first adjustment unit is configured to adjust the characteristic parameters of the main feed water regulating valve when the actual opening change value is less than the product result, and / or when the first response duration of the first preset multiple is greater than the first reference response duration; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0108] In an exemplary embodiment, when the opening signal is a second opening signal with a signal change amplitude greater than the preset change amplitude, the response information includes the overshoot of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening change value under the second opening signal.

[0109] In an exemplary embodiment, the reference index corresponding to the overshoot is the reference overshoot, and the reference index corresponding to the second response duration is the second reference response duration. The adjustment module 1403 includes:

[0110] The second adjustment unit is configured to adjust the characteristic parameters of the main feed water regulating valve when the overshoot is greater than the reference overshoot, and / or when the second response duration of the second preset multiple is greater than the second reference response duration; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0111] In an exemplary embodiment, when the opening signal is a third opening signal at which the main feed water regulating valve is fully open, the response information includes the third response duration of the actual opening change value of the main feed water regulating valve under the third opening signal; when the opening signal is a fourth opening signal at which the main feed water regulating valve is fully closed, the response information includes the fourth response duration of the actual opening change value of the main feed water regulating valve under the fourth opening signal.

[0112] In an exemplary embodiment, the reference index corresponding to the third response duration is the third reference response duration, and the reference index corresponding to the fourth response duration is the fourth reference response duration. The adjustment module 1403 includes:

[0113] The third adjustment unit is configured to adjust the characteristic parameters of the main feed water regulating valve when the third response duration is greater than the third reference response duration, and / or when the fourth response duration is greater than the fourth reference duration; the characteristic parameters include at least one of proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation.

[0114] Each module in the above main feed water regulating valve control device of the steam generator can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above respective modules.

[0115] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in Figure 15 . The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a control method for the main feed water regulating valve of a steam generator.

[0116] Those skilled in the art can understand that Figure 15 the structure shown in is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0117] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the following steps are implemented:

[0118] Send an opening signal to the main feed water regulating valve corresponding to the steam generator;

[0119] Obtain the response information of the main feed water regulating valve under the opening signal;

[0120] Based on the response information and the reference index corresponding to the response information, adjust the characteristic parameters of the main feed water regulating valve to control the working condition of the main feed water regulating valve.

[0121] In one embodiment, when the sent opening signal is a first opening signal whose signal change amplitude is less than a preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal, and the first response duration of the actual opening change value.

[0122] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0123] When the actual opening degree change value is less than the product result, and / or when the first response duration of the first preset multiple is greater than the first reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0124] In one embodiment, when the opening degree signal is a second opening degree signal whose signal change amplitude is greater than the preset change amplitude, the response information includes the overshoot of the main feed water regulating valve under the second opening degree signal and the second response duration of the actual opening degree change value under the second opening degree signal.

[0125] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0126] When the overshoot is greater than the reference overshoot, and / or when the second response duration of the second preset multiple is greater than the second reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0127] In one embodiment, when the opening degree signal is a third opening degree signal at which the main feed water regulating valve is fully open, the response information includes the third response duration of the actual opening degree change value of the main feed water regulating valve under the third opening degree signal; when the opening degree signal is a fourth opening degree signal at which the main feed water regulating valve is fully closed, the response information includes the fourth response duration of the actual opening degree change value of the main feed water regulating valve under the fourth opening degree signal.

[0128] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0129] When the third response duration is greater than the third reference response duration, and / or when the fourth response duration is greater than the fourth reference duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameters corresponding to the main feed water regulation.

[0130] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0131] Send an opening degree signal to the main feed water regulating valve corresponding to the steam generator;

[0132] Obtain the response information of the main feed water regulating valve under the opening degree signal;

[0133] Based on the response information and the reference index corresponding to the response information, adjust the characteristic parameters of the main feed water regulating valve to control the working condition of the main feed water regulating valve.

[0134] In one embodiment, when the opening signal is a first opening signal whose signal change amplitude is less than a preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal and the first response duration of the actual opening change value.

[0135] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0136] When the actual opening change value is less than the product result, and / or the first response duration of the first preset multiple is greater than the first reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0137] In one embodiment, when the opening signal is a second opening signal whose signal change amplitude is greater than the preset change amplitude, the response information includes the overshoot of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening change value under the second opening signal.

[0138] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0139] When the overshoot is greater than the reference overshoot, and / or the second response duration of the second preset multiple is greater than the second reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0140] In one embodiment, when the opening signal is a third opening signal for fully opening the main feed water regulating valve, the response information includes the third response duration of the actual opening change value of the main feed water regulating valve under the third opening signal; when the opening signal is a fourth opening signal for fully closing the main feed water regulating valve, the response information includes the fourth response duration of the actual opening change value of the main feed water regulating valve under the fourth opening signal.

[0141] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0142] When the third response duration is greater than the third reference response duration, and / or the fourth response duration is greater than the fourth reference duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameters corresponding to the main feed water regulation.

[0143] In one embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0144] Send an opening signal to the main feed water regulating valve corresponding to the steam generator;

[0145] Obtain the response information of the main feed water regulating valve under the opening signal;

[0146] Based on the response information and the reference index corresponding to the response information, adjust the characteristic parameters of the main feed water regulating valve to control the working condition of the main feed water regulating valve.

[0147] In one embodiment, when the sent opening signal is a first opening signal with a signal change amplitude less than the preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal and the first response duration of the actual opening change value.

[0148] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0149] When the actual opening change value is less than the product result, and / or the first response duration of the first preset multiple is greater than the first reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0150] In one embodiment, when the opening signal is a second opening signal with a signal change amplitude greater than the preset change amplitude, the response information includes the overshoot of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening change value under the second opening signal.

[0151] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0152] When the overshoot is greater than the reference overshoot, and / or the second response duration of the second preset multiple is greater than the second reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

[0153] In one embodiment, when the opening signal is a third opening signal with the main feed water regulating valve fully open, the response information includes the third response duration of the actual opening change value of the main feed water regulating valve under the third opening signal; when the opening signal is a fourth opening signal with the main feed water regulating valve fully closed, the response information includes the fourth response duration of the actual opening change value of the main feed water regulating valve under the fourth opening signal.

[0154] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0155] When the third response duration is greater than the third reference response duration, and / or the fourth response duration is greater than the fourth reference duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulation, and the supply air flow amplifier parameter corresponding to the main feed water regulation.

[0156] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the various embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memories can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the various embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the various embodiments provided in the present application can be general-purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., and are not limited thereto.

[0157] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0158] The above embodiments only illustrate several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A control method for the main feed water regulating valve of a steam generator, characterized in that, The method includes: Sending an opening signal to the main feed water regulating valve corresponding to the steam generator; Obtaining the response information of the main feed water regulating valve under the opening signal; Based on the response information and the reference index corresponding to the response information, adjusting the characteristic parameters of the main feed water regulating valve to control the working condition of the main feed water regulating valve; Wherein, when the opening signal is a first opening signal with a signal change amplitude less than a preset change amplitude, the response information includes the actual opening change value of the main feed water regulating valve under the first opening signal and the first response duration of the actual opening change value; The reference index corresponding to the actual opening change value is the product result of the follow-up coefficient and the first opening signal, and the reference index corresponding to the first response duration is the first reference response duration. Adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information includes: When the actual opening change value is less than the product result, and / or, the first response duration of the first preset multiple is greater than the first reference response duration, adjusting the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

2. The method according to claim 1, wherein It further includes: When the opening signal is a second opening signal with a signal change amplitude greater than a preset change amplitude, the response information includes the overshoot of the main feed water regulating valve under the second opening signal and the second response duration of the actual opening change value under the second opening signal.

3. The method according to claim 2, wherein, The reference index corresponding to the overshoot is the reference overshoot, and the reference index corresponding to the second response duration is the second reference response duration. Adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information includes: When the overshoot is greater than the reference overshoot, and / or, the second response duration of the second preset multiple is greater than the second reference response duration, adjusting the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, and minimum loop gain.

4. The method according to claim 1, wherein It further includes: When the opening signal is a third opening signal with the main feed water regulating valve fully open, the response information includes the third response duration of the actual opening change value of the main feed water regulating valve under the third opening signal; when the opening signal is a fourth opening signal with the main feed water regulating valve fully closed, the response information includes the fourth response duration of the actual opening change value of the main feed water regulating valve under the fourth opening signal.

5. The method according to claim 4, wherein The reference index corresponding to the third response duration is the third reference response duration, and the reference index corresponding to the fourth response duration is the fourth reference response duration. Adjusting the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information includes: When the third response duration is greater than the third reference response duration, and / or the fourth response duration is greater than the fourth reference response duration, adjust the characteristic parameters of the main feed water regulating valve; the characteristic parameters include at least one of proportional gain, speed gain, minimum loop gain, the supply air pressure corresponding to the main feed water regulating valve, and the supply air flow amplifier parameter corresponding to the main feed water regulating valve.

6. A main feed water regulating valve control device for a steam generator, which executes the control method according to any one of claims 1-5, characterized in that, The device includes: a sending module, configured to send an opening signal to the main feed water regulating valve corresponding to the steam generator; an obtaining module, configured to obtain the response information of the main feed water regulating valve under the opening signal; an adjusting module, configured to adjust the characteristic parameters of the main feed water regulating valve based on the response information and the reference index corresponding to the response information, so as to control the working condition of the main feed water regulating valve.

7. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are implemented.

9. A computer program product comprising a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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