Turbine bypass emission control method, system, device and equipment and storage medium

Abstract

The invention relates to a steam turbine bypass emission control method and system, a device, equipment and a storage medium. The method comprises the following steps: acquiring predetermined at least one type of unit data including a steam turbine load, reactor thermal power and an operation signal; and a target action signal is generated according to the unit data, and the target valve is controlled to act according to the target action signal. The valve action can be adjusted in time according to the actual operation condition of the steam turbine, and the stability and reliability of system operation are ensured. When the load of the steam turbine changes, a response can be made quickly, the opening degree of the valve is adjusted to adapt to a new working condition, and system instability caused by load fluctuation is avoided. And for monitoring and responding to the thermal power of the reactor, safe operation of the nuclear reactor can be effectively guaranteed, and damage to the system caused by abnormal thermal power is prevented. Meanwhile, potential problems can be found in advance through analysis of the operation signals, control measures can be taken in time, the fault occurrence probability is reduced, and the operation efficiency of the whole system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear power plant steam turbine bypass emissions, and in particular to a steam turbine bypass emission control method and system, device, equipment and storage medium. Background Art

[0002] In the actual operation of nuclear power plants, the situation is often complex and changeable. When a transient situation occurs during normal operation, it is necessary to discharge excess steam in a timely manner. This measure is crucial to relieve the overheating of the primary circuit. If the overheating of the primary circuit cannot be effectively alleviated, there will be serious consequences, which is very likely to cause an emergency shutdown of the reactor.

[0003] However, traditional turbine bypass emission control has a slow response speed and may not be able to respond to emergencies in a timely and effective manner. Summary of the invention

[0004] Based on this, it is necessary to provide a turbine bypass emission control system and method, device, equipment and storage medium that can improve the response speed in order to address the above technical problems.

[0005] In a first aspect, the present application provides a method for controlling steam turbine bypass emissions, the method comprising:

[0006] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0007] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0008] In one embodiment, the generating of the target action signal according to the unit data includes:

[0009] Determine the rate of change of steam turbine load according to steam turbine load;

[0010] The target action signal is generated according to the rate of change of turbine load, reactor thermal power and operation signal.

[0011] In one embodiment, the target action signal includes a first action signal; the target valve includes a first valve; the first action signal is used to control the first valve to open; generating the target action signal according to the unit data includes:

[0012] A first action signal is generated when the rate of change exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0013] In one embodiment, the target action signal includes a second action signal; the target valve includes a second valve; the second action signal is used to control the second valve to open; generating the target action signal according to the unit data includes:

[0014] A second action signal is generated when the rate of change exceeds a second rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0015] In one embodiment, the target action signal includes a third action signal; the target valve includes a third valve; the third action signal is used to control the opening of the third valve; generating the target action signal according to the unit data includes:

[0016] A third action signal is generated when the rate of change exceeds a third rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

[0017] In one embodiment, the target action signal includes a fourth action signal; the target valve includes a fourth valve; the fourth action signal is used to control the fourth valve to open; generating the target action signal according to the unit data includes:

[0018] A fourth action signal is generated when the rate of change exceeds a fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0019] In one embodiment, the process of determining the change rate includes:

[0020] Get the rate of change coefficient;

[0021] Calculate the product of the rate of change coefficient and the turbine load, and determine the rate of change based on the product.

[0022] In a second aspect, the present application also provides a turbine bypass emission control device. The device comprises:

[0023] A data acquisition module, used to acquire unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0024] The control module is used to generate a target action signal according to the unit data and control the target valve action according to the target action signal.

[0025] In a third aspect, the present application also provides a turbine bypass emission control system, the turbine bypass emission control system comprising a data receiving component and a control component;

[0026] A data receiving component, used for acquiring unit data; the unit data includes at least one of steam turbine load, reactor thermal power and operation signal;

[0027] The control component is used to generate a target action signal according to the unit data and control the target valve action according to the target action signal.

[0028] In a fourth aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0029] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0030] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0031] In a fifth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0032] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0033] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0034] In a sixth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0035] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0036] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0037] The above-mentioned turbine bypass emission control method and system, device, equipment and storage medium obtain predetermined unit data including at least one of turbine load, reactor thermal power and operation signal; generate a target action signal according to the unit data, and control the target valve action according to the target action signal. The present application can adjust the valve action in time according to the actual operation of the turbine to ensure the stability and reliability of the system operation. When the turbine load changes, it can respond quickly and adjust the valve opening to adapt to the new operating conditions to avoid system instability caused by load fluctuations. The monitoring and response of the reactor thermal power can effectively ensure the safe operation of the nuclear reactor and prevent the abnormal thermal power from damaging the system. At the same time, the analysis of the operation signal can detect potential problems in advance, take control measures in time, reduce the probability of failure, reduce maintenance costs and downtime, and improve the operating efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 An application environment diagram of a steam turbine bypass emission control method in one embodiment;

[0039] Figure 2 A schematic flow chart of a method for controlling steam turbine bypass emissions in one embodiment;

[0040] Figure 3 A schematic diagram of a process for generating a target action signal in one embodiment;

[0041] Figure 4 is a schematic flow chart of a process for determining a change rate in one embodiment;

[0042] Figure 5 A schematic diagram of a turbine bypass emission control system in one embodiment;

[0043] Figure 6 is a structural block diagram of a steam turbine bypass emission control device in one embodiment;

[0044] Figure 7 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below 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.

[0046] First of all, before specifically introducing the technical solution of the embodiments of the present application, the technical background based on the embodiments of the present application is introduced.

[0047] At present, the fast control of the turbine bypass discharge valve is based on the deviation of the average temperature of the primary circuit coolant and the reference average temperature calculated according to the turbine load. Different turbine bypass discharge valve fast action signals are generated according to different temperature deviation values ​​(bypassing the valve positioner and acting directly on the valve).

[0048] The turbine bypass drain valve fast control is based on the deviation of the steam main or header pressure from the reference steam pressure calculated according to the turbine load. Different turbine bypass drain valve fast action signals are generated according to different pressure deviation values ​​(bypassing the valve positioner and acting directly on the valve).

[0049] Disadvantages of the method based on the average temperature of the reactor coolant: The normal operation transient of a nuclear power plant is usually caused by changes in the turbine load. The turbine bypass discharge valve relies on the physical process of the average temperature change of the primary circuit due to the reactor overheating caused by the slower adjustment of nuclear power than the change of turbine load, and is quickly opened or closed. There is a natural delay in the above physical process: that is, the change in the average temperature of the primary circuit coolant can only be reflected in the change of the turbine load to the change of the reactor nuclear power, and then to the change of the reactor thermal power. Each of the above processes requires time for signal acquisition, transmission and processing, which leads to physical delays in the action of the turbine bypass discharge valve.

[0050] Disadvantages of the method based on the secondary circuit steam pressure: The normal operation transient of a nuclear power plant is usually caused by changes in the turbine load, and the turbine bypass discharge valve relies on the change in the steam main pipe or header pressure. On the one hand, the change in pressure is due to the fact that the regulation of nuclear power is slower than the change in turbine load, which causes the reactor to overheat and thus causes the steam generator pressure to rise. On the other hand, the opening of the turbine steam inlet valve becomes smaller, causing throttling in the secondary circuit steam pipeline, resulting in an increase in steam pipeline pressure. There is a natural delay in the above physical process: that is, the change in turbine load to the change in reactor nuclear power, and then to the change in reactor thermal power causing the change in steam generator pressure, which can be reflected in the change in the secondary circuit steam main pipe or header. On the other hand, the pressure conduction caused by throttling also takes time. Each of the above processes requires time for signal acquisition, transmission and processing, which leads to a physical delay in the action of the turbine bypass discharge valve.

[0051] Related technologies have difficulty balancing the stability of the modulation function and the timeliness of the fast function because the modulation function of the valve positioner and the fast function without the valve positioner use the same input signal type, namely, the average coolant temperature deviation. This is reflected in the transient control performance of normal operation, that is, it is difficult to balance the relationship between the stability of valve control during the transient process and the size of the transient margin of normal operation (while obtaining a large operating margin, the valve can be stably controlled). Because the modulation function of the valve positioner and the fast function without the valve positioner use the same input signal type, namely, the steam pressure deviation, it is difficult to balance the stability of the modulation function and the timeliness of the fast function. This is reflected in the transient control performance of normal operation, that is, it is difficult to balance the relationship between the stability of valve control during the transient process and the size of the transient margin of normal operation (while obtaining a large operating margin, the valve can be stably controlled).

[0052] Based on this, the present application provides a turbine bypass emission control method and system, device, equipment and storage medium, aiming to solve the above-mentioned technical problems.

[0053] The turbine bypass emission control method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. The terminal obtains at least one unit data including the turbine load, the reactor thermal power and the operation signal in advance; generates a target action signal according to the unit data, and controls the target valve action according to the target action signal. Among them, the terminal 102 can be but is not limited to various personal computers, laptops, smart phones, tablet computers and Internet of Things devices. The server 104 can be implemented with an independent server or a server cluster consisting of multiple servers.

[0054] In an exemplary embodiment, Figure 2 As shown, the present application provides a turbine bypass emission control method, which is applied to Figure 1 The terminal in is used as an example to illustrate, including the following steps:

[0055] S201, obtaining unit data.

[0056] The unit data includes at least one of turbine load, reactor thermal power and operation signal.

[0057] The embodiment of the present application can obtain unit data through sensors and data acquisition systems. The data includes at least one of turbine load, reactor thermal power and operation signal.

[0058] The turbine load can be obtained by installing a torque sensor or other load measuring device on the turbine shaft to monitor the output power of the turbine in real time, thereby determining the turbine load.

[0059] The measurement of reactor thermal power can be done by combining the thermal hydraulic calculation model with the temperature sensor, pressure sensor and flow sensor set in the reactor coolant system to determine the thermal power output of the reactor. The operating signals may include but are not limited to the speed, vibration signal and temperature signal of the steam turbine, which can reflect the operating status and health of the steam turbine. By monitoring and analyzing these signals, potential problems can be discovered in time and corresponding measures can be taken.

[0060] S202, generating a target action signal according to the unit data, and controlling the target valve action according to the target action signal.

[0061] In the embodiment of the present application, first, the unit data is analyzed and processed. For example, for the steam turbine load data, it can be determined whether the current load is within the normal range according to the preset load threshold range. If the load exceeds the preset range, it may be necessary to adjust the opening of the target valve to maintain the stable operation of the system.

[0062] For the reactor thermal power data, it can be determined whether the coolant flow needs to be increased or decreased according to the size of the thermal power, thereby controlling the opening of the target valve to adjust the coolant flow.

[0063] For the operation signal, it is possible to determine whether there is any abnormality in the steam turbine by analyzing the vibration signal, temperature signal, etc. If an abnormality is found, it may be necessary to immediately close the target valve to prevent an accident.

[0064] The process of generating the target action signal can use advanced control algorithms and logical judgments. For example, fuzzy control algorithms, neural network control algorithms, etc. can be used to generate appropriate target action signals based on the changing trends and characteristics of the unit data. Once the target action signal is generated, the signal can be transmitted to the target valve through an electrical control system or a hydraulic control system to control the valve opening, switch state and other actions. For example, if the target action signal indicates that the flow rate of the coolant needs to be increased, the target valve can be controlled to open gradually to increase the flow rate of the coolant.

[0065] The above-mentioned turbine bypass emission control method and system, device, equipment and storage medium obtain predetermined unit data including at least one of turbine load, reactor thermal power and operation signal; generate a target action signal according to the unit data, and control the target valve action according to the target action signal. The present application can adjust the valve action in time according to the actual operation of the turbine to ensure the stability and reliability of the system operation. When the turbine load changes, it can respond quickly and adjust the valve opening to adapt to the new operating conditions to avoid system instability caused by load fluctuations. The monitoring and response of the reactor thermal power can effectively ensure the safe operation of the nuclear reactor and prevent the abnormal thermal power from damaging the system. At the same time, the analysis of the operation signal can detect potential problems in advance, take control measures in time, reduce the probability of failure, reduce maintenance costs and downtime, and improve the operating efficiency of the entire system.

[0066] In an exemplary embodiment, based on the above embodiment, see Figure 3 The embodiment of the present application relates to a process of generating a target action signal according to unit data, comprising the following steps:

[0067] S301, determining the rate of change of the steam turbine load according to the steam turbine load.

[0068] First, the turbine load is determined by continuously monitoring the turbine output power. This can be done using a power sensor mounted on the turbine shaft or by obtaining real-time load data from the turbine control system.

[0069] In order to accurately calculate the rate of change of the steam turbine load, the following method is used: within a certain time interval, record the steam turbine load values ​​at multiple times. For example, record the steam turbine load once every 1 second. Then, by performing a differential operation on the load values ​​at two adjacent moments and dividing them by the time interval, the load change rate between the two moments is obtained. The load change rates within multiple time intervals are averaged or processed using a more complex algorithm to obtain a more stable and accurate steam turbine load change rate.

[0070] Assume that within a period of time, the recorded turbine load values ​​are L1, L2, L3...Ln, and the corresponding time points are t1, t2, t3...tn. Then the load change rate Vi in the time interval [ti, ti+1] = (Li+1-Li) / (ti+1-ti). By processing multiple such Vi, the final turbine load change rate can be obtained.

[0071] S302, generating a target action signal according to the rate of change of the steam turbine load, the reactor thermal power and the operation signal.

[0072] The embodiment of the present application can set different turbine load change rate threshold ranges. For example, it is divided into three ranges: high-speed change, medium-speed change, and low-speed change. When the turbine load change rate is in the high-speed change range, it indicates that the turbine operating state may have changed significantly, and it is necessary to generate a target action signal more quickly to respond.

[0073] Then, different weight values ​​are assigned according to different rate ranges. The weight value of the high-speed change range is larger, which means that it has a greater impact on the generation of the target action signal.

[0074] The reactor thermal power can also be monitored in real time. The thermal power output of the reactor can be determined by combining the temperature sensor, pressure sensor, and flow sensor installed in the reactor coolant system with the thermal hydraulic calculation model. The safety threshold range of the reactor thermal power is set. If the reactor thermal power exceeds this range, it may pose a threat to the safe operation of the system, and the corresponding target action signal needs to be generated to adjust the system state.

[0075] According to the relationship between the reactor thermal power and the safety threshold, the contribution value to the target action signal is determined. For example, if the reactor thermal power is close to the upper limit of the safety threshold, the generated target action signal should tend to take measures to reduce the thermal power, such as adjusting the valve opening to increase the coolant flow.

[0076] The operation signals include but are not limited to the turbine speed, vibration signal, temperature signal, etc. These signals can reflect the operation status and health of the turbine.

[0077] Analyze and process the operation signal. For example, if the vibration signal is beyond the normal range, it may indicate that the turbine is unbalanced or has other mechanical problems, and the corresponding target action signal needs to be generated for fault diagnosis and processing. Adjust the generation of the target action signal according to the status of the operation signal. For example, if the turbine speed is too high, it may be necessary to generate a signal to reduce the turbine load or adjust the valve opening to control the steam flow.

[0078] In the embodiment of the present application, the turbine load change rate, reactor thermal power and operation signal are comprehensively considered, and the contribution values ​​of these factors are integrated through a specific algorithm to generate a final target action signal. This target action signal can be used to control the actions of various target valves, such as steam control valves, coolant flow control valves, etc., to achieve precise control of the system and ensure safe, stable and efficient operation of the system.

[0079] In an exemplary embodiment, based on the above embodiments, the target action signal of the present application includes a first action signal; the target valve includes a first valve; the first action signal is used to control the opening of the first valve; the target action signal is generated according to the unit data, including: when the change rate exceeds the first rate threshold, the reactor thermal power exceeds the first power threshold and the operation signal exceeds the operation threshold, a first action signal is generated.

[0080] In the embodiment of the present application, first, the turbine load is continuously monitored to determine its rate of change. As mentioned above, a relatively accurate rate of change of the turbine load can be obtained by recording the turbine load values ​​at multiple times within a certain time interval, and then performing differential operations and processing. At the same time, various sensors installed in the reactor coolant system are combined with the thermal hydraulic calculation model to monitor the reactor thermal power in real time. For the operation signal, the operation status signal of the turbine can be obtained through various sensors installed on the turbine and related systems, such as speed sensors, vibration sensors, temperature sensors, etc.

[0081] When the monitored turbine load change rate exceeds the preset first rate threshold, it indicates that the turbine operation state may have changed significantly. For example, if the first rate threshold is set to a certain value of load change per minute, when the actual monitored load change rate exceeds this value, it indicates that the turbine may be undergoing rapid load adjustment or an abnormal situation has occurred.

[0082] At the same time, when the reactor thermal power exceeds the first power threshold, it means that the thermal output of the reactor may exceed the safety range or is in a higher operating state. The first power threshold can be determined according to the design parameters and safety requirements of the reactor. For example, when the thermal power exceeds a certain proportion of the rated power, it is considered that the first power threshold is exceeded.

[0083] In addition, the operation signal exceeding the operation threshold is also an important condition for generating the first action signal. The operation threshold can be set according to different operation signal types. For example, for a speed signal, if the speed exceeds the normal range by a certain amplitude, it is considered to exceed the operation threshold; for a vibration signal, if the vibration amplitude exceeds a specific value, it is considered to exceed the operation threshold; for a temperature signal, if the temperature exceeds the set safety temperature, it is considered to exceed the operation threshold.

[0084] When the above three conditions are met at the same time, that is, the change rate exceeds the first rate threshold, the reactor thermal power exceeds the first power threshold, and the operation signal exceeds the operation threshold, the system generates a first action signal. The first action signal will be transmitted to the control system of the first valve to control the first valve to open.

[0085] For example, during the operation of a nuclear power plant, the turbine load suddenly increases rapidly, the reactor thermal power also rises and exceeds the first power threshold, and the vibration signal of the turbine exceeds the operating threshold. In this case, the system will immediately generate a first action signal to control the first valve to open, so as to discharge excess steam, reduce the reactor thermal power, stabilize the operation of the turbine, etc.

[0086] The embodiment of the present application can timely detect the potential dangerous state of the system through comprehensive monitoring of the turbine load change rate, reactor thermal power and operation signal. When these parameters exceed a specific threshold, a first action signal is generated to control the opening of the first valve, and measures can be taken quickly to avoid serious system failures, such as reactor overheating, turbine damage, etc., thereby greatly improving the safety of the nuclear power plant system.

[0087] In an exemplary embodiment, based on the above embodiment, the target action signal of the present application includes a second action signal; the target valve includes a second valve; the second action signal is used to control the second valve to open; generating the target action signal according to the unit data includes:

[0088] A second action signal is generated when the rate of change exceeds a second rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0089] In the embodiment of the present application, first, as in the previous embodiment, the turbine load is continuously monitored to determine its rate of change, and advanced sensors and data acquisition systems are used to obtain the reactor thermal power and various operating signals of the turbine in real time.

[0090] The second rate threshold here is different from the first rate threshold mentioned above, and it can be set according to different requirements and characteristics of the system. For example, the second rate threshold can be set to a higher turbine load change rate value than the first rate threshold to distinguish different degrees of emergency situations. The first power threshold and the operation threshold can be kept consistent with the previous embodiment, or fine-tuned according to actual conditions.

[0091] When the turbine load change rate exceeds the second rate threshold, it indicates that the turbine may be in a more urgent operating state. For example, there may be a very rapid load increase or decrease, requiring a more rapid response measure.

[0092] At the same time, the reactor thermal power exceeds the first power threshold, indicating that the reactor's thermal output may have posed a threat to system safety. The operation signal exceeding the operation threshold also means that there may be an abnormality in the turbine or the entire system, and timely action is required.

[0093] When these three conditions are met simultaneously, that is, the rate of change exceeds the second rate threshold, the reactor thermal power exceeds the first power threshold, and the operation signal exceeds the operation threshold, the system generates a second action signal.

[0094] The second action signal will be transmitted to the control system of the second valve to control the second valve to open. The second valve can have different functions or act at different positions in the system than the first valve. For example, during the operation of a nuclear power plant, if the turbine load changes very quickly and exceeds the second rate threshold, and the reactor thermal power is also at a high level and exceeds the first power threshold, and the operating signal shows that the turbine has a more serious abnormality, the second action signal generated at this time will control the second valve to open quickly. The opening of the second valve can further increase the steam discharge capacity, or adjust other key parameters in the system to more effectively respond to emergencies and ensure the safe and stable operation of the nuclear power plant system.

[0095] In an exemplary embodiment, based on the above embodiments, the target action signal of the present application includes a third action signal; the target valve includes a third valve; the third action signal is used to control the opening of the third valve; the target action signal is generated according to the unit data, including: when the change rate exceeds the third rate threshold, the reactor thermal power exceeds the second power threshold and the operation signal exceeds the operation threshold, a third action signal is generated.

[0096] The embodiment of the present application continuously monitors the operating status of the steam turbine to determine the rate of change of the steam turbine load. A method similar to the previous embodiment is used to record the steam turbine load value at a certain time interval, and a relatively accurate rate of change is obtained through differential calculation and processing. At the same time, professional sensors and measuring equipment are used to monitor the reactor thermal power in real time.

[0097] Here, a third rate threshold is introduced, and its value is set according to the specific requirements and safety standards of the system, which is different from the first rate threshold and the second rate threshold, and is used to identify different degrees of emergency situations. The second power threshold is also different from the first power threshold, and can be determined according to different operating states and safety requirements of the reactor. The operating threshold remains consistent with the previous embodiment, and is used to measure whether the operating signal of the steam turbine is abnormal.

[0098] When the turbine load change rate exceeds the third rate threshold, this may indicate that the turbine is in a more critical operating state. For example, a sharp load fluctuation may occur, requiring immediate and decisive measures.

[0099] At the same time, if the reactor thermal power exceeds the second power threshold, it indicates that the reactor's thermal output has reached a relatively dangerous level, which may pose a serious threat to the safe and stable operation of the system.

[0100] In addition, when the operating signal exceeds the operating threshold, it indicates that there may be major abnormal conditions in the turbine or the entire system.

[0101] The system will only generate a third action signal when these three conditions are met at the same time, that is, the change rate exceeds the third rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0102] The third action signal will be transmitted to the control system of the third valve to control the third valve to open. The third valve may have special functions in the system, such as providing an additional discharge channel in an emergency, adjusting key fluid parameters, or activating a specific safety protection mechanism.

[0103] For example, during the operation of a nuclear power plant, if the turbine load changes very quickly, far exceeding the third rate threshold, and the reactor thermal power also rises sharply to exceed the second power threshold, and the operation signal shows that the system has a serious abnormality, the third action signal generated at this time will quickly control the third valve to open. The opening of the third valve can quickly relieve system pressure and reduce reactor thermal power, providing a key guarantee for the safe and stable operation of the system.

[0104] In an exemplary embodiment, based on the above embodiment, the target action signal of the present application includes a fourth action signal; the target valve includes a fourth valve; the fourth action signal is used to control the fourth valve to open; generating the target action signal according to the unit data includes:

[0105] A fourth action signal is generated when the rate of change exceeds a fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0106] In the embodiment of the present application, the operation status of the steam turbine is continuously and closely monitored to accurately determine the rate of change of the steam turbine load. By collecting the steam turbine load data at a specific time interval and processing it with a suitable algorithm, a reliable value of the rate of change is obtained. At the same time, the reactor thermal power is monitored in real time with the help of a high-precision sensor.

[0107] The fourth rate threshold may be a specific value, which is set according to different requirements and safety levels of the system to distinguish specific emergency situations. The second power threshold is also determined according to the operating characteristics and safety requirements of the reactor. The operating threshold is used to measure whether the operating signal of the steam turbine exceeds the normal range, which is consistent with the previous embodiment.

[0108] When the turbine load change rate exceeds the fourth rate threshold, it indicates that the turbine may be in a special emergency operation state. For example, an extremely fast load increase or decrease may occur, and quick response measures need to be taken.

[0109] At the same time, if the reactor thermal power exceeds the second power threshold, it means that the reactor's thermal output has reached a relatively dangerous level, which may pose a major threat to the safe and stable operation of the system.

[0110] In addition, when the operating signal exceeds the operating threshold, it indicates that there may be serious abnormal conditions in the turbine or the entire system.

[0111] The system will only generate the fourth action signal when these three conditions are met at the same time, that is, the change rate exceeds the fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0112] The fourth action signal will be transmitted to the control system of the fourth valve to control the fourth valve to open. The fourth valve may have a unique function in the system, such as providing an additional safety channel in an extreme emergency, quickly adjusting key system parameters, or activating a specific emergency protection mechanism.

[0113] For example, during the operation of a nuclear power plant, if the turbine load change rate rises sharply and exceeds the fourth rate threshold, and the reactor thermal power also greatly exceeds the second power threshold, and the operation signal shows that the system has a very serious abnormality, the fourth action signal generated at this time will quickly control the fourth valve to open. The opening of the fourth valve can quickly relieve system pressure and reduce reactor thermal power, providing key support for the safe and stable operation of the nuclear power plant.

[0114] In an exemplary embodiment, based on the above embodiment, see Figure 4 , the process of determining the change rate of the present application includes:

[0115] S401, obtaining a change rate coefficient.

[0116] In the embodiment of the present application, firstly, the change rate coefficient is determined based on multiple factors such as system characteristics, historical operation data, theoretical analysis, etc. This coefficient reflects the relationship between the relative speed of the turbine load change and the actual change rate.

[0117] For example, by analyzing a large amount of historical operating data, we can find out the law of turbine load changes under different working conditions, so as to determine a more appropriate range of change rate coefficients. At the same time, combined with the system design parameters and theoretical models, further optimization and adjustment can be carried out to ensure the accuracy and reliability of the coefficients.

[0118] In actual operation, the operating status of the system can be monitored in real time through a dedicated data acquisition system and analysis software, and the change rate coefficient can be dynamically adjusted as needed. For example, when the system is in a stable operating state, the change rate coefficient can be relatively small; when the system has an abnormal situation or the load changes greatly, the change rate coefficient can be appropriately increased to more accurately reflect the change in the turbine load.

[0119] S402, calculating the product of the change rate coefficient and the turbine load, and determining the change rate according to the product.

[0120] After obtaining the change rate coefficient, the product of the change rate coefficient and the turbine load is calculated, and the change rate is determined based on the product, for example: -τp / 1+τp.

[0121] However, in order to more accurately reflect the actual rate of change, further processing and analysis are required.

[0122] For example, the product can be analyzed in time series to consider the effect of time on the change of turbine load. Specifically, the product values ​​at different time points can be compared, the change between adjacent time points can be calculated, and then divided by the time interval to obtain a more accurate change rate.

[0123] In addition, the change rate can be comprehensively judged and adjusted in combination with other relevant parameters, such as reactor thermal power, operating signals, etc. For example, if the reactor thermal power is high, the change rate may need to be appropriately reduced to avoid system instability; if the operating signal shows that the steam turbine is abnormal, the change rate can also be adjusted according to the specific situation to ensure the safe operation of the system.

[0124] Through the above steps, the rate of change of the steam turbine load can be determined more accurately, providing an important basis for the subsequent generation of target action signals and control of target valve actions.

[0125] In an exemplary embodiment, based on the above embodiment, the method of the embodiment of the present application further includes the following steps:

[0126] Step 1: obtaining predetermined unit data including at least one of turbine load, reactor thermal power and operation signal;

[0127] Step 2: Obtain a change rate coefficient; calculate the product of the change rate coefficient and the turbine load, and determine the change rate based on the product;

[0128] Step 3: generating a first action signal for controlling the opening of the first valve when the rate of change exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold;

[0129] Step 4: generating a second action signal for controlling the opening of the second valve when the rate of change exceeds the second rate threshold, the reactor thermal power exceeds the first power threshold, and the operation signal exceeds the operation threshold;

[0130] Step 5: when the rate of change exceeds the third rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold, generating a third action signal for controlling the opening of the third valve;

[0131] Step 6: When the rate of change exceeds the fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold, generate a fourth action signal for controlling the opening of the fourth valve.

[0132] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0133] Based on the same inventive concept, the embodiment of the present application also provides a turbine bypass emission control device for implementing the turbine bypass emission control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more turbine bypass emission control device embodiments provided below can refer to the limitations of the turbine bypass emission control method above, and will not be repeated here.

[0134] In one embodiment, Figure 5 As shown, the present application provides a turbine bypass emission control system including: a data receiving component for acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operating signal; a control component for generating a target action signal according to the unit data, and controlling the target valve action according to the target action signal.

[0135] Specifically, after the data receiving component obtains the unit data, the change rate of the turbine load or the first-stage pressure of the turbine after signal processing is calculated using the following algorithm.

[0136] The change rate calculated by the above process enters the comparator with different set thresholds. The different set thresholds are determined according to the capacity of the discharge valve or valve group.

[0137] Discharge valve quick action signal: If the turbine load change rate is greater than the set threshold, the generated quick response signal value is 1; otherwise the value is 0.

[0138] Secondary process of fast response function: Reactor thermal power threshold comparator: The reactor thermal power after signal processing enters the comparator with different set thresholds. The different set thresholds are determined according to the value of the reactor thermal power.

[0139] Pre-signal of the discharge valve fast action signal: If the reactor thermal power is greater than the set threshold, the pre-signal value of the fast response signal is 1; otherwise, the value is 0.

[0140] The discharge valve fast action signal: the turbine trip signal and the nuclear power plant with auxiliary power operation signal are ORed, and then ANDed with the above-mentioned pre-signal to generate a fast response signal. If the reactor thermal power is greater than the set threshold and the turbine trip signal or the nuclear power plant with auxiliary power operation signal appears, the discharge valve fast response signal value is 1, otherwise the value is 0.

[0141] Fast action function execution signal: The two discharge valve fast response signals mentioned above use an AND gate to generate a fast response function execution signal, skipping the positioner of the corresponding valve or valve group, and directly acting on the valve or valve group as a fast signal to achieve a fast control function.

[0142] In one embodiment, Figure 6 As shown, a turbine bypass emission control device 500 is provided, comprising:

[0143] The data acquisition module 501 is used to acquire unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0144] The control module 502 is used to generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0145] In one embodiment, the control module includes:

[0146] A rate determination unit, used for determining a rate of change of the steam turbine load according to the steam turbine load;

[0147] The target signal generating unit is used to generate a target action signal according to the rate of change of the steam turbine load, the reactor thermal power and the operation signal.

[0148] In one embodiment, the target action signal includes a first action signal; the target valve includes a first valve; the first action signal is used to control the first valve to open; and the control module includes:

[0149] The first signal generating subunit is used to generate a first action signal when the change rate exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0150] In one embodiment, the target action signal includes a second action signal; the target valve includes a second valve; the second action signal is used to control the second valve to open; and the control module includes:

[0151] The second signal generating subunit is used to generate a second action signal when the change rate exceeds the second rate threshold, the reactor thermal power exceeds the first power threshold, and the operation signal exceeds the operation threshold.

[0152] In one embodiment, the target action signal includes a third action signal; the target valve includes a third valve; the third action signal is used to control the opening of the third valve; and the control module includes:

[0153] The third signal generating subunit is used to generate a third action signal when the change rate exceeds a third rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

[0154] In one embodiment, the target action signal includes a fourth action signal; the target valve includes a fourth valve; the fourth action signal is used to control the fourth valve to open; and the control module includes:

[0155] The fourth signal generating subunit is used to generate a fourth action signal when the change rate exceeds a fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0156] In one embodiment, the rate determination unit includes:

[0157] A coefficient acquisition subunit is used to obtain a change rate coefficient;

[0158] The rate determination subunit is used to calculate the product of the change rate coefficient and the turbine load, and determine the change rate according to the product.

[0159] Each module in the above-mentioned turbine bypass emission control device can be implemented in whole or in part by software, hardware or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0160] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. 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 and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a turbine bypass emission control method is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0161] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure 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 certain components, or have a different arrangement of components.

[0162] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0163] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0164] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0165] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0166] Determine the rate of change of steam turbine load according to steam turbine load;

[0167] The target action signal is generated according to the rate of change of turbine load, reactor thermal power and operation signal.

[0168] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0169] A first action signal is generated when the rate of change exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0170] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0171] A second action signal is generated when the rate of change exceeds a second rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0172] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0173] A third action signal is generated when the rate of change exceeds a third rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

[0174] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0175] A fourth action signal is generated when the rate of change exceeds a fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0176] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0177] Get the rate of change coefficient;

[0178] Calculate the product of the rate of change coefficient and the turbine load, and determine the rate of change based on the product.

[0179] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0180] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0181] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0182] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0183] Determine the rate of change of steam turbine load according to steam turbine load;

[0184] The target action signal is generated according to the rate of change of turbine load, reactor thermal power and operation signal.

[0185] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0186] A first action signal is generated when the rate of change exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0187] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0188] A second action signal is generated when the rate of change exceeds a second rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0189] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0190] A third action signal is generated when the rate of change exceeds a third rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

[0191] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0192] A fourth action signal is generated when the rate of change exceeds a fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0193] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0194] Get the rate of change coefficient;

[0195] Calculate the product of the rate of change coefficient and the turbine load, and determine the rate of change based on the product.

[0196] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0197] Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal;

[0198] Generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

[0199] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0200] Determine the rate of change of steam turbine load according to steam turbine load;

[0201] The target action signal is generated according to the rate of change of turbine load, reactor thermal power and operation signal.

[0202] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0203] A first action signal is generated when the rate of change exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0204] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0205] A second action signal is generated when the rate of change exceeds a second rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

[0206] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0207] A third action signal is generated when the rate of change exceeds a third rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

[0208] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0209] A fourth action signal is generated when the rate of change exceeds a fourth rate threshold, the reactor thermal power exceeds the second power threshold, and the operation signal exceeds the operation threshold.

[0210] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0211] Get the rate of change coefficient;

[0212] Calculate the product of the rate of change coefficient and the turbine load, and determine the rate of change based on the product.

[0213] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions.

[0214] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory 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 memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0215] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0216] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, 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 attached claims.

Claims

1. A method for controlling steam turbine bypass emissions, characterized in that: The method comprises: Acquiring unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal; A target action signal is generated according to the unit data, and a target valve action is controlled according to the target action signal.

2. The method according to claim 1, characterized in that The generating a target action signal according to the unit data comprises: determining a rate of change of the steam turbine load according to the steam turbine load; The target action signal is generated according to the rate of change of the steam turbine load, the reactor thermal power and the operation signal.

3. The method according to claim 2, characterized in that The target action signal includes a first action signal; the target valve includes a first valve; the first action signal is used to control the first valve to open; the generating the target action signal according to the unit data includes: The first action signal is generated when the rate of change exceeds a first rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

4. The method according to claim 2, characterized in that: The target action signal includes a second action signal; the target valve includes a second valve; the second action signal is used to control the second valve to open; the generating the target action signal according to the unit data includes: The second action signal is generated when the rate of change exceeds a second rate threshold, the reactor thermal power exceeds a first power threshold, and the operation signal exceeds an operation threshold.

5. The method according to claim 2, characterized in that: The target action signal includes a third action signal; the target valve includes a third valve; the third action signal is used to control the third valve to open; the generating the target action signal according to the unit data includes: The third action signal is generated when the rate of change exceeds a third rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

6. The method according to claim 2, characterized in that The target action signal includes a fourth action signal; the target valve includes a fourth valve; the fourth action signal is used to control the fourth valve to open; the generating the target action signal according to the unit data includes: The fourth action signal is generated when the rate of change exceeds a fourth rate threshold, the reactor thermal power exceeds a second power threshold, and the operation signal exceeds an operation threshold.

7. The method according to any one of claims 2 to 6, characterized in that: The process of determining the change rate includes: Get the rate of change coefficient; The product of the change rate coefficient and the turbine load is calculated, and the change rate is determined based on the product.

8. A turbine bypass emission control device, characterized in that: The device comprises: A data acquisition module, used to acquire unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal; The control module is used to generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

9. A steam turbine bypass emission control system, characterized in that: The steam turbine bypass emission control system includes a data receiving component and a control component; The data receiving component is used to obtain unit data; the unit data includes at least one of turbine load, reactor thermal power and operation signal; The control component is used to generate a target action signal according to the unit data, and control the target valve action according to the target action signal.

10. A computer device comprising a memory and a processor, wherein the memory stores 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 7 are implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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