Unit variable load feedforward control method and device, electronic equipment and storage medium

Abstract

The invention provides a unit variable load feed-forward control method and device, electronic equipment and a storage medium, and compared with the related technology, according to the embodiment of the invention, the state parameter of the target unit is acquired in real time, and the feed-forward quantity is calculated, so that the current operation condition of the unit can be accurately reflected, and a reliable basis is provided for making a control strategy; the feed-forward quantity is corrected based on the pressure deviation value of the target boiler, the change of the boiler pressure can be quickly responded, the control lag is reduced, and the real-time performance and the accuracy of control are improved; the corrected feed-forward quantity is optimized according to the change interval of the load instruction, so that the unit can be more stably transited when the load changes, and unstable operation and efficiency reduction caused by sudden change of the load are avoided; by cooperatively controlling the multiple subsystems such as the coal quantity system, the air supply system and the induced draft fan system, comprehensive optimization of the running state of the unit can be achieved, the overall running efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of thermal power generation, and in particular to a method and device for variable load feedforward control of a unit, electronic equipment and storage medium. Background Art

[0002] In the process of power generation, the deep peak-shaving capability of coal-fired power generation units is of great significance to the stable operation of the power grid and power dispatching. However, in the process of load changes, traditional coal-fired power generation units often have problems such as energy response lag and large coal quantity fluctuations due to the large inertia of the boiler, which affects the regulation performance and stability of the unit.

[0003] In order to solve the above problems, coal-fired power plants currently generally use advanced control technologies to optimize the units. Among them, reconstructing multi-quadrant variable load feedforward is an effective technical means. This technology achieves rapid compensation for boiler inertia by accurately predicting and dynamically adjusting the feedforward amount, ensuring the stability of boiler energy during load changes. However, the existing multi-quadrant variable load feedforward technology still has some shortcomings in the application process, such as the calculation of the feedforward amount is not accurate enough, the dynamic adjustment is not flexible enough, and the range of action is limited, which limits its application effect in the deep peak regulation process. Therefore, how to make the deep peak regulation capability of coal-fired power generation units more accurate, flexible and widely applicable has become a problem that needs to be solved. Summary of the invention

[0004] The present invention provides a method and device for variable load feedforward control of a unit, an electronic device and a storage medium, the main purpose of which is to solve the problem of poor accuracy of deep peak regulation control of coal-fired power generation units.

[0005] According to a first aspect of the present disclosure, a method for variable load feedforward control of a unit is provided, comprising:

[0006] Acquiring state parameters of the target unit, and calculating a feedforward amount according to the state parameters;

[0007] Based on the pressure deviation value of the target boiler in the target unit, the feedforward amount is corrected;

[0008] According to the variation range of the load command, the corrected feedforward amount is optimized to obtain a target feedforward amount;

[0009] The target feedforward quantity is sent to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

[0010] In some embodiments, the method further comprises:

[0011] In response to the locking signal of the target boiler, the feedforward amount is locked in the same direction to achieve suspension of the output of the feedforward amount.

[0012] In some embodiments, obtaining the state parameters of the target unit and calculating the feedforward amount according to the state parameters includes:

[0013] Using a target sensor disposed on the target unit, the state parameters are obtained, wherein the state parameters include: load change rate, load span, pressure value, change trend and the pressure deviation value;

[0014] The state parameters are preprocessed, and a preset feedforward algorithm is called to calculate the preprocessed state parameters to generate the feedforward amount.

[0015] In some embodiments, the correcting the feedforward amount based on the pressure deviation value of the target boiler in the target unit includes:

[0016] Calculating a pressure deviation value of the target boiler based on a pressure value monitored by a pressure sensor;

[0017] If the pressure deviation value exceeds the adjustment threshold, the feedforward amount is increased or decreased according to a preset correction coefficient based on the size and direction of the pressure deviation value.

[0018] In some embodiments, the optimizing process of the modified feedforward amount according to the change interval of the load instruction to obtain the target feedforward amount includes:

[0019] Based on the variation interval of the load command, splitting the corrected feedforward amount into a preset number of components;

[0020] According to the load regulation requirements, each of the components is optimized to obtain the target feedforward amount.

[0021] According to a second aspect of the present disclosure, a device for variable load feedforward control of a unit is provided, comprising:

[0022] A calculation unit, used to obtain the state parameters of the target unit and calculate the feedforward amount according to the state parameters;

[0023] a correction unit, configured to correct the feedforward amount based on a pressure deviation value of a target boiler in the target unit;

[0024] An optimization unit, configured to optimize the corrected feedforward amount according to a variation interval of the load command to obtain a target feedforward amount;

[0025] A control unit is used to send the target feedforward amount to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

[0026] In some embodiments, the apparatus further comprises:

[0027] The locking unit is used to lock the feedforward amount in the same direction in response to the locking signal of the target boiler, so as to suspend the output of the feedforward amount.

[0028] In some embodiments, the computing unit comprises:

[0029] An acquisition module, used for acquiring the state parameters by using a target sensor provided on the target unit, wherein the state parameters include: load change rate, load span, pressure value, change trend and the pressure deviation value;

[0030] The first calculation module is used to preprocess the state parameters, call a preset feedforward algorithm, calculate the preprocessed state parameters, and generate the feedforward amount.

[0031] In some embodiments, the correction unit includes:

[0032] A second calculation module, configured to calculate a pressure deviation value of the target boiler based on a pressure value monitored by the pressure sensor;

[0033] The correction module is used to increase or decrease the feedforward amount according to a preset correction coefficient based on the size and direction of the pressure deviation value when the pressure deviation value exceeds the adjustment threshold.

[0034] In some embodiments, the root optimization unit includes:

[0035] A splitting module, used for splitting the corrected feedforward amount into a preset number of components based on a variation interval of the load command;

[0036] The optimization module is used to optimize each of the components according to the load regulation requirements to obtain the target feedforward amount.

[0037] According to a third aspect of the present disclosure, there is provided an electronic device, including:

[0038] at least one processor; and

[0039] a memory communicatively connected to the at least one processor; wherein,

[0040] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method described in the first aspect.

[0041] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0042] According to a fifth aspect of the present disclosure, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method as described in the first aspect above.

[0043] The present disclosure provides a method and device, electronic device and storage medium for variable load feedforward control of a unit, which obtains state parameters of a target unit and calculates a feedforward amount according to the state parameters; corrects the feedforward amount based on a pressure deviation value of a target boiler in the target unit; optimizes the corrected feedforward amount according to a change interval of a load instruction to obtain a target feedforward amount; and sends the target feedforward amount to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system and a denitrification system. Compared with the related art, the embodiment of the present disclosure can accurately reflect the current operating status of the unit by acquiring the state parameters of the target unit in real time and calculating the feedforward amount, thereby providing a reliable basis for the formulation of the control strategy; the feedforward amount is corrected based on the pressure deviation value of the target boiler, which can quickly respond to changes in boiler pressure, reduce control lag, and improve the real-time and accuracy of control; the corrected feedforward amount is optimized according to the change range of the load instruction, which can make the unit transition more smoothly when the load changes, avoiding unstable operation and efficiency reduction due to sudden load changes; by coordinated control of multiple subsystems such as the coal quantity system, air supply system, and induced draft fan system, the operating status of the unit can be fully optimized, the overall operating efficiency can be improved, and energy consumption can be reduced.

[0044] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0046] Figure 1 A flow chart of a method for variable load feedforward control of a unit provided in an embodiment of the present disclosure;

[0047] Figure 2A flow chart of another method for variable load feedforward control of a unit provided in an embodiment of the present disclosure;

[0048] Figure 3 A schematic diagram of the structure of a device for variable load feedforward control of a unit provided in an embodiment of the present disclosure;

[0049] Figure 4 A schematic diagram of the structure of another device for variable load feedforward control of a unit provided in an embodiment of the present disclosure;

[0050] Figure 5 A schematic block diagram of an exemplary electronic device provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0051] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0052] The following describes the method and device, electronic device and storage medium for variable load feedforward control of a unit according to an embodiment of the present disclosure with reference to the accompanying drawings.

[0053] Figure 1 A flow chart of a method for variable load feedforward control of a unit provided in an embodiment of the present disclosure.

[0054] like Figure 1 As shown, the method comprises the following steps:

[0055] Step 101, obtaining state parameters of a target unit, and calculating a feedforward amount according to the state parameters.

[0056] In the embodiments of the present disclosure, in order to achieve more precise and accurate control of the target unit, it is necessary to obtain various state parameters of the target unit in a comprehensive and real-time manner. These state parameters are important information reflecting the current operating status, performance and possible problems of the unit, and include but are not limited to the load level of the unit, steam flow, steam temperature and pressure, boiler combustion efficiency, temperature and pressure of each key component, and overall energy efficiency ratio of the unit.

[0057] The way to obtain these status parameters is usually through sensors and monitoring equipment installed in various key parts of the unit. These sensors can sense the operating status of the unit in real time and convert the sensed information into electrical signals or other transmittable forms so that they can be remotely acquired and analyzed.

[0058] After successfully obtaining the various state parameters of the target unit, a professional algorithm or mathematical model is used to calculate the feedforward amount based on these parameters and the unit's operating characteristics and control logic. The feedforward amount refers to the adjustment required to achieve the desired control target (such as maintaining steam temperature stability, improving combustion efficiency, etc.) predicted based on the current state of the unit. This calculation process needs to take into account multiple factors, including the dynamic response characteristics of the unit, the delay and inertia of the control system, and the interference of the external environment.

[0059] Step 102: correcting the feedforward amount based on the pressure deviation value of the target boiler in the target unit.

[0060] In the embodiments of the present disclosure, in order to further improve the accuracy and response speed of the control, it is necessary to consider the actual operating condition of the target boiler, especially its pressure deviation value. The pressure deviation value of the target boiler refers to the difference between the current actual pressure of the boiler and the set pressure or expected pressure. This deviation value can directly reflect whether the operating state of the boiler is stable and whether there are problems that need to be adjusted. Therefore, the previously calculated feedforward amount is corrected based on this pressure deviation value.

[0061] The correction process is as follows: First, monitor the pressure value of the target boiler in real time and compare it with the set pressure value to calculate the current pressure deviation value. Then, according to the size and direction of this deviation value, as well as the control logic and algorithm of the unit, the feedforward amount will be adjusted accordingly. If the actual pressure of the boiler is lower than the set pressure, the feedforward amount may be increased to strengthen combustion or adjust other related parameters to bring the boiler pressure back to near the set value. Conversely, if the actual pressure of the boiler is higher than the set pressure, the feedforward amount may be reduced to avoid safety hazards caused by excessive pressure.

[0062] This correction method based on the target boiler pressure deviation value can more accurately reflect the actual operating status of the boiler and adjust the control strategy in time to ensure that the unit can operate stably in the desired state. This correction can not only improve the accuracy of control, but also reduce the energy efficiency loss and safety hazards caused by pressure fluctuations, providing a strong guarantee for the long-term stable operation of the unit.

[0063] Step 103 , optimizing the corrected feedforward amount according to the variation interval of the load command to obtain a target feedforward amount.

[0064] In the embodiment of the present disclosure, in the unit operation control strategy, the load command directly reflects the demand of the power system or the user side for the unit output power. In order to manage the unit operation more finely and ensure that both the load demand can be met and the efficient and stable operation can be maintained, it is necessary to further optimize the feedforward amount that has been corrected based on the target boiler pressure deviation value according to the change range of the load command.

[0065] The change range of the load command usually refers to the fluctuation range or change trend of the load command within a certain period of time. The size and change speed of this range are directly related to the amplitude and speed of the unit adjustment. Therefore, based on the corrected feedforward amount, the specific change range of the load command will be further analyzed to determine how to optimize the feedforward amount.

[0066] The optimization process is dynamic and complex. First, based on the real-time data of the load command, identify the size and trend of its change range. If the load command changes relatively slowly, it means that the demand for the unit's output power is relatively stable. At this time, the feedforward amount may be fine-tuned to maintain the stable operation of the unit under the current operating conditions. If the load command changes more drastically, such as a large increase or decrease, then the feedforward amount needs to be adjusted more significantly to ensure that the unit can respond quickly to load changes and avoid supply and demand imbalances caused by delayed response.

[0067] During the optimization process, it is necessary to fully consider the physical characteristics and operating limitations of the unit, such as the combustion efficiency of the boiler, the speed limit of the turbine, etc., to ensure that the optimized feedforward amount can meet the load demand without causing damage to the unit.

[0068] Step 104, sending the target feedforward quantity to the target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

[0069] In the embodiment of the present disclosure, after the target feedforward amount is accurately calculated and optimized, the target feedforward amount is sent to each target subsystem in the unit control system to achieve coordinated control. These target systems cover key components such as the coal quantity system, air supply system, induced draft fan system, desuperheating water system, and denitrification system, which together constitute the core of stable operation and efficient environmental protection of the unit.

[0070] Specifically, the target feedforward quantity will be converted into a command signal that each system can understand and execute. For the coal quantity system, this means adjusting the speed of the coal feeder or the amount of coal powder according to the feedforward quantity to accurately control the fuel supply during the combustion process and ensure stable and efficient combustion. The air supply system will adjust the air volume of the blower according to the instructions of the feedforward quantity, optimize the air distribution in the furnace, promote the full combustion of the fuel, and reduce unnecessary heat loss.

[0071] The induced draft fan system will also adjust the operating status of the induced draft fan according to the changes in the target feedforward quantity, ensure smooth boiler smoke exhaust, maintain stable negative pressure in the furnace, and create a good environment for the combustion process. The desuperheating water system will accurately control the steam temperature by adjusting the flow of desuperheating water according to the control requirements of the steam temperature, prevent overheating or too low, protect downstream equipment and improve efficiency. In addition, the denitrification system will also receive the signal of the target feedforward quantity, and adjust the injection amount of the denitrification agent or the operating conditions of the reactor accordingly to ensure that the emission of nitrogen oxides meets environmental protection standards and reduce air pollution.

[0072] This series of operations are based on advanced automatic control systems and precise control algorithms, ensuring that each subsystem can respond quickly and accurately to changes in the target feedforward quantity, and achieve real-time optimization and coordinated control of the unit's operating status. In this way, not only can the overall operating efficiency and stability of the unit be improved, but also energy consumption and pollutant emissions can be significantly reduced, contributing to the sustainable development of the power industry.

[0073] The present disclosure provides a method for variable load feedforward control of a unit, which obtains state parameters of a target unit and calculates a feedforward amount according to the state parameters; corrects the feedforward amount based on a pressure deviation value of a target boiler in the target unit; optimizes the corrected feedforward amount according to a change interval of a load instruction to obtain a target feedforward amount; and sends the target feedforward amount to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system. Compared with the related art, the embodiment of the present disclosure can accurately reflect the current operating status of the unit by acquiring the state parameters of the target unit in real time and calculating the feedforward amount, thereby providing a reliable basis for the formulation of the control strategy; the feedforward amount is corrected based on the pressure deviation value of the target boiler, which can quickly respond to changes in boiler pressure, reduce control lag, and improve the real-time and accuracy of control; the corrected feedforward amount is optimized according to the change range of the load instruction, which can make the unit transition more smoothly when the load changes, avoiding unstable operation and efficiency reduction due to sudden load changes; by coordinated control of multiple subsystems such as the coal quantity system, air supply system, and induced draft fan system, the operating status of the unit can be fully optimized, the overall operating efficiency can be improved, and energy consumption can be reduced.

[0074] In order to clearly illustrate the embodiment of the present disclosure, this embodiment provides a flow chart of another method for variable load feedforward control of a unit.

[0075] like Figure 2 As shown, the method comprises the following steps:

[0076] Step 201, using a target sensor disposed on the target unit to obtain the state parameters, wherein the state parameters include: load change rate, load span, pressure value, change trend and the pressure deviation value.

[0077] Step 202, preprocessing the state parameters, calling a preset feedforward algorithm, calculating the preprocessed state parameters, and generating the feedforward amount.

[0078] Specifically, in steps 201 to 202, in the automation control process of the target unit, the key status parameters of the unit are captured in real time by the deployed target sensors. These sensors are precisely installed in various key parts of the unit, such as boilers, turbines, flues, etc., to ensure that every subtle change in the operation of the unit can be fully and accurately monitored.

[0079] The state parameters obtained are the core information for the operation and control of the unit. They not only reflect the current operating conditions of the unit, but also indicate possible future operating trends. Specifically, the state parameters we are concerned about include variable load rate, load span, pressure value, change trend and pressure deviation value. The variable load rate reflects the speed of the unit load change, which is crucial for predicting the future load demand of the unit; the load span describes the range of load fluctuations of the unit over a period of time, which helps to evaluate the operating stability and flexibility of the unit; the pressure value is directly related to the operating status of the boiler and turbine, and is a key indicator for judging whether the unit is operating normally; the change trend reveals the change law of the unit state parameters over time, which provides an important basis for prediction and control; and the pressure deviation value, as a direct feedback of the boiler operating status, plays an irreplaceable role in timely adjusting the control strategy and ensuring the stable operation of the boiler.

[0080] After obtaining these original state parameters, they are not directly used to calculate the feedforward quantity, but first undergo a series of preprocessing work. The purpose of preprocessing is to remove noise and outliers in the data to ensure the accuracy and reliability of the data. This may include steps such as data cleaning, filtering, and normalization to ensure the accuracy and stability of subsequent calculations.

[0081] After preprocessing, the preset feedforward algorithm will be called. This algorithm is designed based on the unit's operating characteristics and control logic. It can generate feedforward quantities for controlling the unit's operation based on the preprocessed state parameters through mathematical operations and logical reasoning. This feedforward quantity, as the core output of the unit's control strategy, will directly guide subsequent control operations, such as adjusting the coal volume, air volume, induced draft fan speed, etc., to ensure that the unit can operate stably according to the expected goals.

[0082] In this way, we can not only achieve real-time monitoring and precise control of the unit's operating status, but also flexibly adjust the control strategy according to the actual needs of the unit's operation and changes in external conditions, to ensure that the unit always remains in the best operating state, providing strong guarantees for the safe, stable and economical operation of the power system.

[0083] Step 203: Calculate the pressure deviation value of the target boiler based on the pressure value monitored by the pressure sensor.

[0084] Step 204: if the pressure deviation value exceeds the adjustment threshold, the feedforward amount is increased or decreased according to a preset correction coefficient based on the size and direction of the pressure deviation value.

[0085] Specifically, in steps 203 to 204, the pressure sensor monitors the pressure value inside the target boiler in real time, which is a key indicator for evaluating the operating status and stability of the boiler. In order to accurately grasp the difference between the actual working pressure of the boiler and the set pressure, the pressure deviation value of the target boiler is calculated based on the real-time monitoring data provided by the pressure sensor.

[0086] The calculation process of the pressure deviation value is not complicated, but it is extremely critical. Compare the actual pressure value monitored by the pressure sensor with the set pressure value or expected pressure value of the boiler. The set pressure value is usually determined based on the boiler's design parameters, operating requirements, safety regulations and other factors. It represents the pressure level that the boiler should reach under normal working conditions. The difference between the actual pressure value and the set pressure value can be used to obtain the pressure deviation value, which can intuitively reflect whether the current working pressure of the boiler deviates from the normal range.

[0087] Once the pressure deviation is calculated, it is immediately evaluated to determine whether it exceeds the preset adjustment threshold. The adjustment threshold is set based on the operating characteristics and control requirements of the boiler, and it defines when the feedforward amount needs to be adjusted to correct the pressure deviation. If the pressure deviation is within the adjustment threshold, it means that the boiler is operating relatively stable, and the feedforward amount will remain unchanged or be fine-tuned to maintain stable operation of the boiler.

[0088] However, if the pressure deviation exceeds the adjustment threshold, it means that the operating state of the boiler has deviated significantly and needs to be adjusted in time to avoid possible safety hazards and efficiency losses. In this case, the feedforward amount is increased or decreased according to the preset correction coefficient based on the size and direction of the pressure deviation. The correction coefficient is carefully designed based on the control logic and operating experience of the boiler, which can ensure that the adjusted feedforward amount can quickly and effectively correct the pressure deviation and return the boiler pressure to near the set value.

[0089] Specifically, if the pressure deviation value is positive, that is, the actual pressure is higher than the set pressure, we may reduce the feedforward amount according to the correction factor to reduce the combustion intensity of the boiler or adjust other related parameters to reduce the boiler pressure. Conversely, if the pressure deviation value is negative, that is, the actual pressure is lower than the set pressure, we may increase the feedforward amount to enhance the combustion of the boiler or improve other related parameters to increase the boiler pressure.

[0090] Through this dynamic adjustment mechanism based on the pressure deviation value, we can achieve real-time monitoring and precise control of the boiler operating status, ensuring that the boiler always remains in the best operating state, providing strong guarantee for the stable, efficient and safe operation of the unit.

[0091] Step 205 : splitting the corrected feedforward amount into a preset number of components based on the variation interval of the load command.

[0092] Step 206: Optimize each of the components according to the load regulation requirements to obtain the target feedforward amount.

[0093] Specifically, in steps 205 to 206, in the refined management of the boiler control system, the change range of the load command is an important basis for guiding the adjustment and allocation of the feedforward amount. The change of the load command not only reflects the immediate fluctuation of the demand for steam or thermal energy in the power system or industrial process, but is also directly related to the boiler combustion efficiency, energy utilization rate and overall operation stability. Therefore, based on this change range, the feedforward amount that has been initially corrected is scientifically and reasonably split, aiming to respond to the rapid changes in load through a more refined control strategy, while optimizing the operating performance of the boiler.

[0094] First, according to the forecast trend and historical data of the load command, a reasonable number of splits is determined to divide the corrected feedforward into multiple components. These components can be regarded as direct instructions for different links such as boiler combustion control, steam generation, and heat energy distribution. Each part has a specific adjustment task and works together to meet the overall load demand.

[0095] Next, each of the decomposed components is optimized according to the specific needs of load regulation. This process involves many considerations: For components that need to respond quickly to load changes, a more sensitive control algorithm is used to ensure that the boiler can adjust the output in the shortest time to meet the sharp increase or decrease in load. Taking into account energy efficiency and environmental protection requirements, energy-saving optimization strategies are implemented for certain components, such as adjusting the fuel-air mixing ratio, optimizing the combustion process, or using advanced heat recovery technology to reduce energy waste and emissions. In order to ensure the smooth operation of the boiler, especially for those load parts that are sensitive to pressure and temperature fluctuations, a more robust control strategy is adopted to ensure that a stable steam supply or heat output can be maintained under any operating conditions. Combined with the operating status and historical data of the boiler, a preventive maintenance strategy is implemented for certain key components to avoid potential equipment failures or performance degradation through early adjustments or minor corrections.

[0096] After optimization, each component will be reintegrated to form the final target feedforward. This target feedforward not only accurately reflects the requirements of the current and future load instructions, but also achieves a comprehensive improvement in boiler operating performance through refined splitting and optimization, including faster response speed, higher energy efficiency, stronger operating stability, and lower maintenance costs. Such a control strategy is of vital importance to improving the flexibility and reliability of the entire energy system.

[0097] Step 207, sending the target feedforward quantity to the target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

[0098] Specifically, in step 207, the target feedforward amount will be converted into a command signal that can be understood and executed by each system. For the coal quantity system, this means adjusting the speed of the coal feeder or the amount of coal powder according to the feedforward amount to accurately control the fuel supply during the combustion process and ensure stable and efficient combustion. The air supply system will adjust the air volume of the blower according to the indication of the feedforward amount, optimize the air distribution in the furnace, promote the full combustion of the fuel, and reduce unnecessary heat loss.

[0099] The induced draft fan system will also adjust the operating status of the induced draft fan according to the changes in the target feedforward quantity, ensure smooth boiler smoke exhaust, maintain stable negative pressure in the furnace, and create a good environment for the combustion process. The desuperheating water system will accurately control the steam temperature by adjusting the flow of desuperheating water according to the control requirements of the steam temperature, prevent overheating or too low, protect downstream equipment and improve efficiency. In addition, the denitrification system will also receive the signal of the target feedforward quantity, and adjust the injection amount of the denitrification agent or the operating conditions of the reactor accordingly to ensure that the emission of nitrogen oxides meets environmental protection standards and reduce air pollution.

[0100] This series of operations are based on advanced automatic control systems and precise control algorithms, ensuring that each subsystem can respond quickly and accurately to changes in the target feedforward quantity, and achieve real-time optimization and coordinated control of the unit's operating status. In this way, not only can the overall operating efficiency and stability of the unit be improved, but also energy consumption and pollutant emissions can be significantly reduced, contributing to the sustainable development of the power industry.

[0101] As an implementable manner of the embodiment of the present disclosure, the method further includes: in response to a locking signal of the target boiler, locking the feedforward amount in the same direction to achieve suspension of output of the feedforward amount.

[0102] Specifically, in the safe operation mechanism of the boiler control system, the lockout signal processing for the target boiler is a crucial function. When the boiler needs to temporarily stop running or enter the safe mode due to various reasons (such as equipment failure, maintenance requirements, safety protection triggering, etc.), the system will generate a lockout signal. This signal serves as an instant feedback on the current state of the boiler, requiring the control system to take corresponding measures immediately to ensure the safety and stability of the boiler and its related equipment.

[0103] In response to this locking signal, the control system will quickly perform a series of preset operations, one of which is to lock the current feedforward quantity in the same direction. The so-called "locking in the same direction" means that the control system will temporarily freeze or lock the current feedforward output according to the requirements of the locking signal, so that it remains unchanged at the current value, rather than continuing to increase or decrease according to the original control logic. The purpose of this operation is to directly control the combustion intensity, steam generation or heat output of the boiler by suspending the output of the feedforward quantity, so as to quickly put the boiler in a relatively stable and safe state.

[0104] To achieve the same-direction locking of the feedforward quantity, the control system needs to have a high response speed and accuracy. On the one hand, the system must be able to instantly identify and respond to the locking signal to ensure that it can take prompt action in any emergency situation; on the other hand, the system also needs to accurately control the output of the feedforward quantity to avoid further deterioration of the boiler status due to misoperation or delay.

[0105] In practical applications, the same-direction interlock of the feedforward quantity is usually closely integrated with the boiler's emergency shutdown mechanism, safety protection system, and fault handling process. When the interlock signal is triggered, in addition to suspending the feedforward quantity output, the system may also simultaneously initiate other protection measures, such as shutting off the fuel supply, opening the safety valve for pressure relief, and starting the backup system, to ensure the safety of the boiler and its peripheral equipment.

[0106] In this way, the boiler control system can quickly and effectively take countermeasures in the face of various emergencies to protect the boiler from damage, while ensuring the safety of personnel and the stability of the production environment. The design and implementation of this safety mechanism is an indispensable part of the boiler automation control system and is of great significance to improving the reliability and safety of boiler operation.

[0107] It should be noted that the embodiments of the present disclosure may include multiple steps. For the convenience of description, these steps are numbered, but these numbers do not limit the execution time slots or execution order between the steps; these steps can be implemented in any order, and the embodiments of the present disclosure do not limit this.

[0108] Corresponding to the above-mentioned method for variable load feedforward control of a unit, the present invention also proposes a device for variable load feedforward control of a unit. Since the device embodiment of the present invention corresponds to the above-mentioned method embodiment, the details not disclosed in the device embodiment can be referred to the above-mentioned method embodiment, and will not be repeated in the present invention.

[0109] Figure 3 A schematic diagram of a structure of a device for variable load feedforward control of a unit provided in an embodiment of the present disclosure, such as Figure 3 As shown, including:

[0110] A calculation unit 31 is used to obtain the state parameters of the target unit and calculate the feedforward amount according to the state parameters;

[0111] A correction unit 32, configured to correct the feedforward amount based on a pressure deviation value of a target boiler in the target unit;

[0112] An optimization unit 33 is used to optimize the corrected feedforward amount according to the change interval of the load command to obtain a target feedforward amount;

[0113] The control unit 34 is used to send the target feedforward amount to the target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

[0114] The present disclosure provides a device for variable load feedforward control of a unit, which obtains state parameters of a target unit and calculates a feedforward amount according to the state parameters; corrects the feedforward amount based on a pressure deviation value of a target boiler in the target unit; optimizes the corrected feedforward amount according to a change interval of a load instruction to obtain a target feedforward amount; and sends the target feedforward amount to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system. Compared with the related art, the embodiment of the present disclosure can accurately reflect the current operating status of the unit by acquiring the state parameters of the target unit in real time and calculating the feedforward amount, thereby providing a reliable basis for the formulation of the control strategy; the feedforward amount is corrected based on the pressure deviation value of the target boiler, which can quickly respond to changes in boiler pressure, reduce control lag, and improve the real-time and accuracy of control; the corrected feedforward amount is optimized according to the change range of the load instruction, which can make the unit transition more smoothly when the load changes, avoiding unstable operation and efficiency reduction due to sudden load changes; by coordinated control of multiple subsystems such as the coal quantity system, air supply system, and induced draft fan system, the operating status of the unit can be fully optimized, the overall operating efficiency can be improved, and energy consumption can be reduced.

[0115] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the device also includes:

[0116] The locking unit 35 is used to lock the feedforward amount in the same direction in response to the locking signal of the target boiler, so as to suspend the output of the feedforward amount.

[0117] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the calculation unit 31 includes:

[0118] The acquisition module 311 is used to acquire the state parameters by using the target sensor provided on the target unit, wherein the state parameters include: load change rate, load span, pressure value, change trend and the pressure deviation value;

[0119] The first calculation module 312 is used to preprocess the state parameters, and call a preset feedforward algorithm to calculate the preprocessed state parameters to generate the feedforward amount.

[0120] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the correction unit 32 includes:

[0121] A second calculation module 321 is used to calculate the pressure deviation value of the target boiler based on the pressure value monitored by the pressure sensor;

[0122] The correction module 322 is used to increase or decrease the feedforward amount according to a preset correction coefficient based on the size and direction of the pressure deviation value when the pressure deviation value exceeds the adjustment threshold.

[0123] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the root optimization unit 33 includes:

[0124] A splitting module 331 is used to split the corrected feedforward amount into a preset number of components based on the change interval of the load command;

[0125] The optimization module 332 is used to optimize each of the components according to the load regulation requirements to obtain the target feedforward amount.

[0126] It should be noted that the above explanation of the method embodiment is also applicable to the device of this embodiment, and the principle is the same, which is not limited in this embodiment.

[0127] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0128] Figure 5 A schematic block diagram of an example electronic device 400 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0129] like Figure 5 As shown, the device 400 includes a computing unit 401, which can perform various appropriate actions and processes according to a computer program stored in a ROM (Read-Only Memory) 402 or a computer program loaded from a storage unit 408 to a RAM (Random Access Memory) 403. In the RAM 403, various programs and data required for the operation of the device 400 can also be stored. The computing unit 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An I / O (Input / Output) interface 405 is also connected to the bus 404.

[0130] A number of components in the device 400 are connected to the I / O interface 405, including: an input unit 406, such as a keyboard, a mouse, etc.; an output unit 407, such as various types of displays, speakers, etc.; a storage unit 408, such as a disk, an optical disk, etc.; and a communication unit 409, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 409 allows the device 400 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0131] The computing unit 401 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 401 include, but are not limited to, a CPU (Central Processing Unit), a GPU (Graphic Processing Units), various dedicated AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, a DSP (Digital Signal Processor), and any appropriate processor, controller, microcontroller, etc. The computing unit 401 performs the various methods and processes described above, such as a method for variable load feedforward control of a unit. For example, in some embodiments, the method for variable load feedforward control of a unit may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 408. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 400 via the ROM 402 and / or the communication unit 409. When the computer program is loaded into the RAM 403 and executed by the computing unit 401, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the computing unit 401 may be configured to execute the aforementioned method of variable load feedforward control of the unit by any other appropriate means (for example, by means of firmware).

[0132] Various embodiments of the systems and techniques described above herein may be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application Specific Standard Products), SOCs (System On Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that may be executed and / or interpreted on a programmable system including at least one programmable processor that may be a special purpose or general purpose programmable processor that may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0133] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0134] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a RAM, a ROM, an EPROM (Electrically Programmable Read-Only-Memory) or a flash memory, an optical fiber, a CD-ROM (Compact Dis sc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0135] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0136] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: LAN (Local Area Network), WAN (Wide Area Network), the Internet, and blockchain networks.

[0137] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services ("Virtual Private Server", or "VPS" for short). The server may also be a server of a distributed system, or a server combined with a blockchain.

[0138] It should be noted that artificial intelligence is a discipline that studies how computers can simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, planning, etc.), and includes both hardware-level and software-level technologies. Artificial intelligence hardware technologies generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, and big data processing; artificial intelligence software technologies mainly include computer vision technology, speech recognition technology, natural language processing technology, as well as machine learning / deep learning, big data processing technology, knowledge graph technology, and other major directions.

[0139] The various numerical numbers such as first and second involved in the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, but also indicate the order of precedence.

[0140] At least one in the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

[0141] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0142] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for variable load feedforward control of a unit, characterized in that: include: Acquiring state parameters of the target unit, and calculating a feedforward amount according to the state parameters; Based on the pressure deviation value of the target boiler in the target unit, the feedforward amount is corrected; According to the variation range of the load command, the corrected feedforward amount is optimized to obtain a target feedforward amount; The target feedforward quantity is sent to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

2. The method according to claim 1, characterized in that: The method further comprises: In response to the locking signal of the target boiler, the feedforward amount is locked in the same direction to achieve suspension of the output of the feedforward amount.

3. The method according to claim 1, characterized in that The step of obtaining the state parameters of the target unit and calculating the feedforward amount according to the state parameters includes: Using a target sensor disposed on the target unit, the state parameters are obtained, wherein the state parameters include: load change rate, load span, pressure value, change trend and the pressure deviation value; The state parameters are preprocessed, and a preset feedforward algorithm is called to calculate the preprocessed state parameters to generate the feedforward amount.

4. The method according to claim 1, characterized in that The step of correcting the feedforward amount based on the pressure deviation value of the target boiler in the target unit includes: Calculating a pressure deviation value of the target boiler based on a pressure value monitored by a pressure sensor; If the pressure deviation value exceeds the adjustment threshold, the feedforward amount is increased or decreased according to a preset correction coefficient based on the size and direction of the pressure deviation value.

5. The method according to claim 1, characterized in that The step of optimizing the corrected feedforward amount according to the change interval of the load command to obtain a target feedforward amount includes: Based on the variation interval of the load command, splitting the corrected feedforward amount into a preset number of components; According to the load regulation requirements, each of the components is optimized to obtain the target feedforward amount.

6. A device for variable load feedforward control of a unit, characterized in that: include: A calculation unit, used to obtain the state parameters of the target unit and calculate the feedforward amount according to the state parameters; a correction unit, configured to correct the feedforward amount based on a pressure deviation value of a target boiler in the target unit; An optimization unit, configured to optimize the corrected feedforward amount according to a variation interval of the load command to obtain a target feedforward amount; A control unit is used to send the target feedforward amount to a target system for coordinated control, wherein the target system includes at least one of a coal quantity system, an air supply system, an induced draft fan system, a cooling water system, and a denitrification system.

7. The device according to claim 6, characterized in that The device also includes: The locking unit is used to lock the feedforward amount in the same direction in response to the locking signal of the target boiler, so as to suspend the output of the feedforward amount.

8. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 5.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-5.

10. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 5.

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