Control method and system for preventing fuel master control reverse adjustment under RB working condition of thermal power plant

Abstract

The invention provides a control method and system for preventing fuel master control reverse adjustment under the RB working condition of a thermal power plant, and belongs to the technical field of thermal power plants. The method comprises the following steps: when any RB action is triggered, matching to obtain a corresponding RB target load value and a load reduction rate according to the type of the triggered RB action; determining a time interval from the active power value of the current target thermal power generating unit to the target load value of the RB according to a difference value between the active power value of the current target thermal power generating unit and the target load value of the RB when the recorded RB action is triggered and the load reduction rate; and within the time interval, executing an output limiting strategy for fuel master control of the target thermal power generating unit. Therefore, fuel master control reverse adjustment is effectively prevented, the purpose of rapid load reduction is achieved, and stable operation of a unit and a power grid is kept. The purpose of preventing fuel master control reverse adjustment under different types of RB working conditions is achieved, safe and stable operation of a unit is ensured, and the adjusting capacity and flexibility of a thermal power plant are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power plants, and in particular to a control method for preventing a fuel master control from performing reverse regulation under RB conditions in a thermal power plant, a control system for preventing a fuel master control from performing reverse regulation under RB conditions in a thermal power plant, a machine-readable storage medium and an electronic device. Background Art

[0002] With the rapid development of renewable energy power generation, the power grid has put forward higher requirements on the regulation ability of thermal power units. As the main body of traditional power supply, thermal power units need to have the ability to respond quickly and adjust accurately to balance the fluctuations of the power grid. In this process, the operation of boilers, turbines and generators requires a high degree of coordination and precise control. Any equipment failure, fuel supply interruption or system abnormality will have a serious impact on the entire power generation process, and even cause equipment damage or shutdown. The core of the RB (Runback, which refers to the rapid reduction control strategy of the load of the generator set in the power system) control strategy is to respond to these emergencies and quickly adjust the operating parameters of the power plant through automation to ensure system stability and equipment safety.

[0003] However, after the RB action is triggered, the traditional RB control strategy will immediately cause the total fuel output of the unit to decrease. At this time, the output and feedback of the fuel master control in the automatic state deviate, and the fuel master control will output an instruction to continue to increase the fuel amount, causing the fuel master control to reversely regulate the RB condition rapid load reduction instruction, increasing the process time of the unit's rapid load reduction and reducing the regulation ability and flexibility of the thermal power plant.

[0004] Therefore, how to prevent the reverse regulation of the fuel master control under different types of RB conditions, ensure the safe and stable operation of the unit, and improve the regulation ability and flexibility of thermal power plants is an urgent problem to be solved. Summary of the invention

[0005] The purpose of the implementation mode of the present invention is to provide a control method and system for preventing reverse regulation of the fuel master control under the RB operating condition of a thermal power plant, so as to at least solve the above-mentioned problem of how to prevent reverse regulation of the fuel master control under different types of RB operating conditions, ensure the safe and stable operation of the unit, and improve the regulation capability and flexibility of the thermal power plant.

[0006] In order to achieve the above-mentioned object, the first aspect of the present invention provides a control method for preventing the reverse regulation of the fuel master control under the RB working condition of a thermal power plant, comprising: When any RB action is triggered, the corresponding RB target load value and load reduction rate are matched according to the type of the triggered RB action; According to the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered, and the load reduction rate, determine the time interval from the current target thermal power unit active power value to the RB target load value; During the time interval, an output limiting strategy for the fuel master control of the target thermal power unit is executed.

[0007] Optionally, the above matching and obtaining the corresponding RB target load value and load reduction rate according to the type of the triggered RB action includes: The operating state of the current target thermal power unit and the corresponding fault data of the tripped auxiliary machine are used as the actual situation data of the triggered RB action, and the actual situation data of the triggered RB action is compared and matched with the preliminary test results corresponding to the type of the triggered RB action, and based on the comparison and matching results, the RB target load value corresponding to the triggered RB action is determined; The load reduction rate corresponding to the triggered RB action is determined based on the actual situation data of the triggered RB action and the response speed of the target thermal power unit to different loads determined by the equipment configuration parameters of the target thermal power unit; wherein the equipment configuration parameters of the target thermal power unit include at least equipment characteristic data and equipment factory data.

[0008] Optionally, the type classification rules of the fuel master control of the above-mentioned target thermal power unit include: According to the fuel type or the type of control object, the fuel master control type of the target thermal power unit is divided into: According to the fuel type, the fuel master control of the target thermal power unit is divided into the fuel master control of the coal-fired thermal power unit using coal as fuel and the fuel master control of the gas-fired thermal power unit using natural gas as fuel; According to the type of control object, the fuel master control of the target thermal power unit is divided into a fuel master control that controls the fuel quantity with a coal feeder as the control object, a fuel master control that controls the fuel quantity with a powder feeder as the control object, a fuel master control that controls the fuel quantity with a capacity damper as the control object, and a fuel master control that controls the fuel quantity with a gas valve as the control object.

[0009] Optionally, the above determination of the time interval from the current target thermal power unit active power value to the RB target load value includes: According to the ratio of the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered and the load reduction rate, the time interval from the current target thermal power unit active power value to the RB target load value is obtained.

[0010] Optionally, the above output limitation strategy includes a strategy for controlling the fuel master control of the target thermal power unit to lock the increase within a time interval.

[0011] Optionally, the recording rules of the current target thermal power unit active power value include: When the RB function of the target thermal power unit is determined to be put into operation, when any RB action corresponding to the preset unit load is triggered, the active power value of the current target thermal power unit is automatically recorded.

[0012] Optionally, the RB operating conditions corresponding to the above RB action include the forced draft fan RB, the induced draft fan RB, the primary fan RB, the air preheater RB, the feed water pump RB and the boiler water circulation pump RB.

[0013] A second aspect of the present invention provides a control system for preventing the fuel master control from reversely adjusting under the RB working condition of a thermal power plant, comprising: The RB action matching module is used to match the corresponding RB target load value and load reduction rate according to the type of the triggered RB action when any RB action is triggered; The time interval determination module is used to determine the time interval from the current target thermal power unit active power value to the RB target load value according to the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered, and the load reduction rate; The output restriction strategy execution module is used to execute the output restriction strategy of the fuel master control of the target thermal power unit within a time interval.

[0014] In a third aspect of the present invention, a machine-readable storage medium is provided, on which instructions are stored, and when the instructions are executed by a processor, the processor is configured to execute the above-mentioned control method for preventing reverse regulation of the fuel master control under the RB operating condition of a thermal power plant.

[0015] In a fourth aspect of the present invention, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the control method for preventing reverse regulation of the fuel master control under the RB operating condition of a thermal power plant is implemented.

[0016] Through the above technical scheme, a control method and system for preventing the reverse regulation of the fuel master control under the RB working condition of a thermal power plant are provided. According to the type of triggered RB action, the corresponding RB target load value and load reduction rate are matched. According to the difference between the current target active power value of the thermal power unit when the RB action is triggered and the RB target load value, and the load reduction rate, the accurate time interval from the current target active power value of the thermal power unit to the RB target load value is determined. The output of the fuel master control of the target thermal power unit is limited within this time interval. Through this control method, the reverse regulation of the fuel master control can be effectively prevented, the purpose of rapid load reduction can be achieved, and the stable operation of the unit and the power grid can be maintained. The purpose of preventing the reverse regulation of the fuel master control under different types of RB working conditions is achieved, ensuring the safe and stable operation of the unit, and improving the regulation ability and flexibility of the thermal power plant.

[0017] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a flow chart of a control method for preventing reverse regulation of the fuel master control under RB conditions of a thermal power plant provided by an embodiment of the present invention; Figure 2 It is a flow chart of another control method for preventing reverse regulation of the fuel master control under RB conditions of a thermal power plant provided by an embodiment of the present invention; Figure 3 It is a logic diagram of a control method for preventing reverse regulation of a fuel master control under RB conditions in a thermal power plant provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the implementation logic of a control method for preventing the reverse regulation of the fuel master control under the RB working condition of a thermal power plant provided by an embodiment of the present invention; Figure 5 is a schematic diagram of RB target value matching logic provided by one embodiment of the present invention; Figure 6 It is a schematic diagram of RB load reduction rate matching logic provided by one embodiment of the present invention; Figure 7 It is a block diagram of a control system for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant provided by an embodiment of the present invention; Figure 8 It is a schematic diagram of the structure of an electronic device provided by a preferred embodiment of the present invention.

[0019] Description of Reference Numerals 10 - electronic device, 100 - processor, 101 - memory, 102 - computer program. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0021] Figure 1 FIG. 1 is a flow chart of a control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant provided by an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a control method for preventing the fuel master control from reversely adjusting under the RB working condition of a thermal power plant, comprising: S110: When any RB action is triggered, the corresponding RB target load value and load reduction rate are matched according to the type of the triggered RB action; Among them, the RB target load value can be used The load reduction rate can be expressed as express.

[0022] In some implementations of this embodiment, the recording rules of the above-mentioned current target thermal power unit active power value include: when the RB function of the target thermal power unit is determined to be put into operation, when any RB action corresponding to the preset unit load is triggered, the current target thermal power unit active power value is automatically recorded.

[0023] In some implementations of the present embodiment, the above-mentioned matching to obtain the corresponding RB target load value and load reduction rate according to the type of triggered RB action includes: taking the operating status of the current target thermal power unit and the fault data of the corresponding tripping auxiliary machine as the actual situation data of the triggered RB action, comparing and matching the actual situation data of the triggered RB action with the preliminary test results corresponding to the type of the triggered RB action, and determining the RB target load value corresponding to the triggered RB action based on the comparison and matching results; determining the load reduction rate corresponding to the triggered RB action according to the actual situation data of the triggered RB action and the response speed of the target thermal power unit to different loads determined by the equipment configuration parameters of the target thermal power unit; wherein the equipment configuration parameters of the target thermal power unit include at least equipment characteristic data and equipment factory data.

[0024] Specifically, the RB target load value It is mainly determined based on the operating status of the unit (i.e. the operating status of the current target thermal power unit), the fault condition of the tripping auxiliary machine, and the type of RB action triggered, so as to avoid causing the unit to trip. Load reduction rate It is mainly determined based on the characteristics of the equipment, the manufacturer's instructions (i.e., equipment factory data) and different response speeds to the load. The load reduction rate corresponding to different types of RB actions is determined based on the specific fault conditions of the auxiliary equipment, the operating status of the unit, and the consideration of ensuring the safe operation of the unit, so as to ensure the safe and stable operation of the target thermal power unit and the rapid adjustment of the load.

[0025] S120: determining the time interval from the current target thermal power unit active power value to the RB target load value according to the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered, and the load reduction rate; In some implementations of the present embodiment, the above-mentioned determination of the time interval from the current target active power value of the thermal power unit to the RB target load value includes: obtaining the time interval from the current target active power value of the thermal power unit to the RB target load value based on the ratio of the difference between the current target active power value of the thermal power unit and the RB target load value when the RB action is triggered and the load reduction rate.

[0026] Specifically, according to the current target active power value of the thermal power unit and the RB target load value, the difference between the two is calculated; then according to the ratio of the difference between the current target active power value of the thermal power unit and the RB target load value and the load reduction rate v, the time interval from the current target active power value of the thermal power unit to the RB target load value is calculated, and the time interval can be represented by T.

[0027] S130: Execute the output restriction strategy of the fuel master control of the target thermal power unit within the time interval.

[0028] Specifically, the output of the fuel master control of the target thermal power unit is limited within the time interval.

[0029] In some implementations of this embodiment, the above-mentioned output limitation strategy includes a strategy of controlling the fuel master control of the target thermal power unit to lock the increase within a time interval.

[0030] Specifically, when both the fuel master control automatic status signal and the RB action signal trigger signal are sent, the fuel master control is controlled to lock the increase within the time interval to prevent the fuel master control from issuing an instruction to continue increasing the fuel amount due to deviations between the fuel quantity feedback and the instruction in the early stage of the RB action trigger, thereby preventing reverse regulation and ensuring the rapidity of the unit load reduction.

[0031] Specifically, the method matches the corresponding RB target load value and load reduction rate according to the type of triggered RB action. According to the difference between the current target active power value of the thermal power unit when the RB action is triggered and the RB target load value, as well as the load reduction rate, the accurate time interval from the current target active power value of the thermal power unit to the RB target load value is determined. The output of the fuel master control of the target thermal power unit is limited within this time interval. This control method can effectively prevent the reverse adjustment of the fuel master control, achieve the purpose of rapid load reduction, and maintain the stable operation of the unit and the power grid. The purpose of preventing the reverse adjustment of the fuel master control under different types of RB working conditions is achieved, ensuring the safe and stable operation of the unit and the improvement of the regulation capability and flexibility of the thermal power plant.

[0032] In the above implementation process, the control method for preventing the reverse adjustment of the fuel master control under the RB condition of the thermal power plant is applicable to the control objects of the six common RB types, different fuel types and different fuel master controls in thermal power plants, and is more widely used; the active power of the unit at the time of RB action triggering is recorded in real time, and the target load and load reduction rate of the corresponding RB type are quickly matched, and the accurate time interval for the active power of the unit to reach the RB target load value is obtained by calculation, and the fuel master control output is controlled to be locked within the time interval to prevent its reverse adjustment, and the load reduction rate of the unit under the RB condition is improved through logical improvement, the calculation is closer to reality, and the calculation accuracy and efficiency are high, while the adjustment ability and flexibility of the thermal power plant are improved, ensuring the safe and stable operation of the unit.

[0033] It should be noted that when the RB action is triggered, the fuel master control may produce reverse adjustment due to the delay of the feedback signal. If the target is set directly based on the adjustment amount alone, the incremental operation may be triggered before the load fully reaches the target, resulting in output oscillation. This method calculates the time interval in advance and controls the adjustment process to ensure that the adjustment is completed as expected. Even if there are short-term deviations or fluctuations in the process, the increase or decrease of the fuel master control output can be limited through the time window to prevent over-adjustment or under-adjustment.

[0034] In some implementations of the present embodiment, the type classification rules of the fuel master control of the above-mentioned target thermal power unit include: classifying the type of fuel master control of the target thermal power unit according to the fuel type or the control object type, including: according to the fuel type, dividing the fuel master control of the target thermal power unit into the fuel master control of a coal-fired thermal power unit using coal as fuel and the fuel master control of a gas-fired thermal power unit using natural gas as fuel; according to the control object type, dividing the fuel master control of the target thermal power unit into a fuel master control for controlling the fuel quantity with a coal feeder as the control object, a fuel master control for controlling the fuel quantity with a powder feeder as the control object, a fuel master control for controlling the fuel quantity with a capacity damper as the control object, and a fuel master control for controlling the fuel quantity with a gas valve as the control object.

[0035] In some implementations of this embodiment, the RB operating conditions corresponding to the above-mentioned RB action include the forced draft fan RB, the induced draft fan RB, the primary fan RB, the air preheater RB, the feed water pump RB and the boiler water circulation pump RB.

[0036] Please refer to Figure 2 , Figure 2 The flowchart of another control method for preventing the reverse regulation of the fuel master control under the RB working condition of a thermal power plant provided by an embodiment of the present invention. A control method for preventing the reverse regulation of the fuel master control under the RB working condition comprises the following steps: Recording steps: Under the premise that the unit RB function is put into use, when any RB action is triggered under a certain load, the control logic immediately records the current unit active power value ; Matching steps: When any RB action is triggered under a certain load, the corresponding RB target load value is matched according to the triggered RB type. Load reduction rate ; Calculation steps: Based on the current active power value of the unit and RB target load value , calculate the difference between the two; then, according to the ratio of the difference to the load reduction rate v, the time interval T for the active power of the computer group to reach the target load value; Control steps: When both the fuel master control automatic state signal and the RB action signal trigger signal are issued, this method controls the fuel master control to lock the increase, so as to prevent the fuel master control from deviating from the fuel quantity feedback and the instruction in the early stage of the RB action trigger, thereby issuing an instruction to continue to increase the fuel quantity, and preventing reverse adjustment, until the unit active power stabilizes to the target load value, and the RB signal is automatically reset.

[0037] Please refer to Figure 3 , Figure 3 This is a logic diagram of a control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant provided by an embodiment of the present invention. Taking a coal-fired unit with a rated power of 330MW and a fuel master control with a coal feeder as the main control object as an example, in this implementation case, the control method for preventing the reverse regulation of the fuel master control under the RB condition is used in the RB control strategy of the unit.

[0038] Specifically, the RB types of the unit include five types: forced draft fan RB, induced draft fan RB, primary fan RB, air preheater RB, and feed water pump RB. Different RB target load values ​​and RB load reduction rates are determined for each type of RB based on the preliminary test results, fault conditions of each equipment, characteristics of the equipment and the manufacturer's instructions.

[0039] Please refer to Figure 4 , Figure 4This is a schematic diagram of the implementation logic of a control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant provided by an embodiment of the present invention. When any type of RB action of the unit is triggered, the current unit active power value is quickly recorded. .like Figure 4 As shown, the RB target load value , Active power value of the unit when RB action is triggered and RB corresponding to the load reduction rate It is transmitted to the fuel master control logic, and the time interval T for the unit active power to reach the target load value is obtained through logical calculation. Then, T and the RB trigger signal are transmitted to the fuel master control hand operator through logic, and the fuel master control is controlled to lock the increase within the T time interval to prevent the fuel master control from reverse adjustment until the unit active power stabilizes to the target load value, the RB signal is automatically reset, and the RB condition ends.

[0040] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic diagram of RB target value matching logic provided by one embodiment of the present invention, Figure 6 This is a schematic diagram of the RB load reduction rate matching logic provided by an embodiment of the present invention. When any type of RB action of the unit is triggered, the corresponding RB target load value is selected according to the RB type using the minimum value selection logic. ; Then use the maximum value selection logic to select the load reduction rate corresponding to RB .

[0041] Figure 7 1 is a block diagram of a control system for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant provided by an embodiment of the present invention. Figure 7 As shown, an embodiment of the present invention provides a control system for preventing the fuel master control from reversely adjusting under the RB condition of a thermal power plant, including: The RB action matching module is used to match the corresponding RB target load value and load reduction rate according to the type of the triggered RB action when any RB action is triggered; The time interval determination module is used to determine the time interval from the current target thermal power unit active power value to the RB target load value according to the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered, and the load reduction rate; The output restriction strategy execution module is used to execute the output restriction strategy of the fuel master control of the target thermal power unit within a time interval.

[0042] Specifically, the system matches the corresponding RB target load value and load reduction rate according to the type of triggered RB action. According to the difference between the current target active power value of the thermal power unit when the RB action is triggered and the RB target load value, as well as the load reduction rate, the accurate time interval from the current target active power value of the thermal power unit to the RB target load value is determined. The output of the fuel master control of the target thermal power unit is limited within this time interval. This control method can effectively prevent the reverse adjustment of the fuel master control, achieve the purpose of rapid load reduction, and maintain the stable operation of the unit and the power grid. The purpose of preventing the reverse adjustment of the fuel master control under different types of RB working conditions is achieved, ensuring the safe and stable operation of the unit and improving the regulation ability and flexibility of the thermal power plant.

[0043] An embodiment of the present invention also provides a machine-readable storage medium having instructions stored thereon, which, when executed by the processor 100, configures the processor 100 to execute the above-mentioned control method for preventing reverse regulation of the fuel master control under the RB condition of a thermal power plant.

[0044] Machine-readable storage media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0045] An embodiment of the present invention also provides an electronic device 10, which includes a memory 101, a processor 100, and a computer program 102 stored in the memory 101 and executable on the processor 100. When the processor 100 executes the computer program 102, the control method for preventing reverse regulation of the fuel master control under the RB operating condition of a thermal power plant is implemented.

[0046] like Figure 8 FIG. 1 is a schematic diagram of an electronic device provided by an embodiment of the present invention. Figure 8As shown, the electronic device 10 of this embodiment includes: a processor 100, a memory 101, and a computer program 102 stored in the memory 101 and executable on the processor 100. When the processor 100 executes the computer program 102, the steps in the above method embodiment are implemented. Alternatively, when the processor 100 executes the computer program 102, the functions of each module / unit in the above device embodiment are implemented.

[0047] Exemplarily, the computer program 102 may be divided into one or more modules / units, one or more modules / units are stored in the memory 101, and are executed by the processor 100 to complete the present invention. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 102 in the electronic device 10. For example, the computer program 102 may be divided into a RB action matching module, a time interval determination module, and an output restriction strategy execution module.

[0048] The electronic device 10 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The electronic device 10 may include, but is not limited to, a processor 100 and a memory 101. Those skilled in the art will appreciate that Figure 8 It is only an example of the electronic device 10 and does not constitute a limitation of the electronic device 10. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0049] The processor 100 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0050] The memory 101 may be an internal storage unit of the electronic device 10, such as a hard disk or memory of the electronic device 10. The memory 101 may also be an external storage device of the electronic device 10, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card (FlashCard), etc. equipped on the electronic device 10. Further, the memory 101 may also include both an internal storage unit of the electronic device 10 and an external storage device. The memory 101 is used to store computer programs and other programs and data required by the electronic device 10. The memory 101 may also be used to temporarily store data that has been output or is to be output.

[0051] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0052] It should be understood by those skilled in the art that the embodiments of the present application may be provided as methods, systems, or computer program 102 products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program 102 product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0053] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program 102 products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by the computer program 102 instructions. These computer program 102 instructions can be provided to a processor 100 of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor 100 of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0054] These computer program 102 instructions may also be stored in a computer readable memory 101 that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory 101 produce an article of manufacture including an instruction device that implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0055] These computer program 102 instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0056] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0057] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant, characterized in that: include: When any RB action is triggered, the corresponding RB target load value and load reduction rate are matched according to the type of the triggered RB action; Determine the time interval from the current target thermal power unit active power value to the RB target load value according to the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered, and the load reduction rate; During the time interval, an output limiting strategy for the fuel master control of the target thermal power unit is executed.

2. The control method for preventing the fuel master control from reversely adjusting under the RB condition of a thermal power plant according to claim 1, characterized in that: The method of matching the corresponding RB target load value and load reduction rate according to the type of the triggered RB action includes: The operating state of the current target thermal power unit and the corresponding fault data of the tripped auxiliary machine are used as the actual situation data of the triggered RB action, and the actual situation data of the triggered RB action is compared and matched with the preliminary test results corresponding to the type of the triggered RB action, and based on the comparison and matching results, the RB target load value corresponding to the triggered RB action is determined; The load reduction rate corresponding to the triggered RB action is determined based on the actual situation data of the triggered RB action and the response speed of the target thermal power unit to different loads determined by the equipment configuration parameters of the target thermal power unit; wherein the equipment configuration parameters of the target thermal power unit include at least equipment characteristic data and equipment factory data.

3. The control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant according to claim 1 is characterized in that: The type classification rules of the fuel master control of the target thermal power unit include: According to the fuel type or the type of control object, the fuel master control type of the target thermal power unit is divided into: According to the fuel type, the fuel master control of the target thermal power unit is divided into the fuel master control of the coal-fired thermal power unit using coal as fuel and the fuel master control of the gas-fired thermal power unit using natural gas as fuel; According to the type of control object, the fuel master control of the target thermal power unit is divided into a fuel master control that controls the fuel quantity with a coal feeder as the control object, a fuel master control that controls the fuel quantity with a powder feeder as the control object, a fuel master control that controls the fuel quantity with a capacity damper as the control object, and a fuel master control that controls the fuel quantity with a gas valve as the control object.

4. The control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant according to claim 1 is characterized in that: The determining of the time interval from the current target thermal power unit active power value to the RB target load value comprises: According to the ratio of the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered and the load reduction rate, the time interval from the current target thermal power unit active power value to the RB target load value is obtained.

5. The control method for preventing the fuel master control from reversely adjusting under the RB condition of a thermal power plant according to claim 1, characterized in that: The output limiting strategy includes a strategy for controlling the fuel master control of the target thermal power unit to lock the increase within the time interval.

6. The control method for preventing the fuel master control from reversely adjusting under the RB condition of a thermal power plant according to claim 1, characterized in that: The recording rules of the active power value of the current target thermal power unit include: When the RB function of the target thermal power unit is determined to be put into operation, when any RB action corresponding to the preset unit load is triggered, the active power value of the current target thermal power unit is automatically recorded.

7. The control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant according to claim 1 is characterized in that: The RB working conditions corresponding to the RB action include the forced draft fan RB, the induced draft fan RB, the primary fan RB, the air preheater RB, the feed water pump RB and the boiler water circulation pump RB.

8. A control system for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant, characterized in that: include: The RB action matching module is used to match the corresponding RB target load value and load reduction rate according to the type of the triggered RB action when any RB action is triggered; A time interval determination module, used to determine the time interval from the current target thermal power unit active power value to the RB target load value according to the difference between the current target thermal power unit active power value and the RB target load value when the RB action is triggered, and the load reduction rate; The output restriction strategy execution module is used to execute the output restriction strategy of the fuel master control of the target thermal power unit within the time interval.

9. A machine-readable storage medium having instructions stored thereon, characterized in that: When the instruction is executed by the processor, the processor is configured to execute the control method for preventing reverse regulation of the fuel master control under the RB condition of a thermal power plant as described in any one of claims 1 to 7.

10. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the control method for preventing the reverse regulation of the fuel master control under the RB condition of a thermal power plant as described in any one of claims 1 to 7 is implemented.

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