Fuel main feedforward intelligent regulation control system and method before frequency modulation of thermal power unit
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-14
- Publication Date
- 2026-08-11
AI Technical Summary
[0003]由此带来一系列突出控制问题：调频过程机组蓄热被大量消耗，造成主蒸汽压力大幅跌落或超调，主汽温度、再热汽温波动加剧，机组热力参数稳定性变差，加剧设备热应力损耗
本发明实施例提供一种火电机组调频前燃料主前馈智能调节控制系统及方法，该系统通过为燃料主前馈提供调频专属通道，利用控制模块对机组主汽压力模块、主汽压力智能设定模块、主汽压力智能设定惯性前模块以及一次调频前负荷指令模块的输出进行处理控制，把电网频率偏差转化的负荷需求和主汽压力偏差相结合，能够在调频动作发生前提前介入实现动态补偿，兼顾一次调频速动性与机组运行稳定性，让机组的锅炉或汽机去调整出力，从而既稳住电网频率，又尽量不影响主汽压力的稳定，提升火电机组调频性能并保障机组安全稳定运行。
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Figure CN122553250A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of intelligent control technology for thermal power units, specifically relating to an intelligent regulation and control system and method for fuel main feedforward before frequency regulation of thermal power units. Background Technology
[0002] As the proportion of renewable energy connected to the power grid continues to increase, grid frequency fluctuations are becoming more frequent. The grid is placing increasingly stringent demands on the primary frequency regulation performance of grid-connected thermal power units, requiring them to not only possess rapid power response capabilities but also maintain stable operating parameters and a balance between boiler and turbine energy supply and demand. Currently, large-capacity coal-fired power units, as the main power source for grid frequency regulation, generally employ a coordinated boiler-turbine system (CCS) for load and pressure regulation. The turbine-side DEH system undertakes the task of rapid power regulation in primary frequency control, while the boiler side provides steam energy through fuel regulation. The overall approach follows a regulation mode of rapid response on the turbine side and delayed energy replenishment on the boiler side.
[0003] This leads to a series of prominent control problems: the unit's heat storage is consumed in large quantities during the frequency regulation process, causing a significant drop or overshoot in the main steam pressure, increased fluctuations in main steam temperature and reheat steam temperature, and deterioration in the stability of the unit's thermal parameters, which exacerbates the thermal stress loss of the equipment. Summary of the Invention
[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a fuel main feedforward intelligent regulation and control system and method for thermal power units before frequency regulation.
[0005] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, embodiments of the present invention provide a fuel main feedforward intelligent regulation and control system for thermal power units before frequency regulation, comprising: a main steam pressure module, a main steam pressure intelligent setting module, a main steam pressure intelligent setting inertial front module, a load command module before primary frequency regulation, a control module, and a fuel main control feedforward intelligent regulation and control module before primary frequency regulation, wherein: The output terminals of the main steam pressure module, the main steam pressure intelligent setting module, the main steam pressure intelligent setting inertial front module, and the primary frequency regulation front load command module are connected to the input terminal of the control module. The output terminal of the control module is connected to the input terminal of the primary frequency regulation front fuel main control feedforward intelligent regulation control module.
[0006] In one possible implementation of the first aspect, the control module includes a first control submodule, a second control submodule, a third control submodule, and a first addition module, wherein: The output terminals of the main steam pressure module and the main steam pressure intelligent setting module are connected to the input terminal of the first control submodule; The output of the main steam pressure intelligent setting inertial front module is connected to the input of the second control submodule; The output of the primary frequency regulation preload command module is connected to the input of the third control submodule; The output terminals of the first control submodule, the second control submodule, and the third control submodule are connected to the input terminal of the first adder module; The output of the first adder module is connected to the input of the fuel master control feedforward intelligent regulation control module before primary frequency regulation.
[0007] In one possible implementation of the first aspect, the first control submodule includes a first subtraction module and a first first-order inertial module, wherein: The input of the first subtraction module is connected to the output of the main steam pressure module and the main steam pressure intelligent setting module. The output of the first subtraction module is connected to the input of the first first-order inertia module. The output of the first first-order inertia module is connected to the input of the first addition module.
[0008] In one possible implementation of the first aspect, the second control submodule includes a second first-order inertial module, a first function module, and a first multiplication module, wherein: The input terminals of the second-order inertial module and the first function module are respectively connected to the output terminal of the main steam pressure intelligent setting inertial module. The output terminals of the second-order inertial module and the first function module are connected to the input terminal of the first multiplication module. The output terminal of the first multiplication module is connected to the input terminal of the first addition module.
[0009] In one possible implementation of the first aspect, the third control submodule includes a third first-order inertial module, a second function module, and a second multiplication module, wherein: The input terminals of the third first-order inertial module and the second function module are respectively connected to the output terminal of the first frequency modulation preload command module. The output terminals of the third first-order inertial module and the second function module are connected to the input terminal of the second multiplication module. The output terminal of the second multiplication module is connected to the input terminal of the first addition module.
[0010] In one possible implementation of the first aspect, the control module further includes multiple switching modules and multiple constant modules, wherein: The outputs of the first control submodule, the second control submodule, and the third control submodule are each connected to the Y terminal of a switching module. The N terminal of each switching module is connected to the output of a constant module. The output of the switching module is connected to the input of the first addition module.
[0011] In one possible implementation of the first aspect, the control module further includes a coordination control module, the output of which is connected to the enable trigger terminals of multiple switching modules.
[0012] Secondly, embodiments of the present invention provide a method for intelligent regulation and control of fuel main feedforward before frequency regulation of a thermal power unit, comprising the following steps: The control module performs control processing based on the output values of the unit's main steam pressure module, main steam pressure intelligent setting module, main steam pressure intelligent setting inertial front module, and primary frequency regulation front load command module, and obtains the output value. Before the first frequency regulation, the fuel master control feedforward intelligent regulation control module outputs according to the output value of the control module to achieve control.
[0013] In one possible implementation of the second aspect, the control module performs control processing based on the output values of the unit's main steam pressure module, the main steam pressure intelligent setting module, the main steam pressure intelligent setting inertial front module, and the primary frequency regulation front load command module, and obtains the output value, including: The first control submodule performs control processing based on the output values of the unit's main steam pressure module and the main steam pressure intelligent setting module, and obtains the output value. The second control submodule intelligently sets the output value of the inertial front module based on the main steam pressure, performs control processing, and obtains the output value. The third control submodule performs control processing based on the output value of the primary frequency modulation preload command module and obtains the output value; The first addition module performs addition operations based on the output values of the first control submodule, the second control submodule, and the third control submodule, and obtains the output value. Before primary frequency regulation, the fuel master control feedforward intelligent regulation control module outputs control based on the output value of the control module, including: Before the first frequency regulation, the fuel master control feedforward intelligent regulation control module outputs the value based on the output value of the first adder module to achieve control.
[0014] In one possible implementation of the second aspect, the first control submodule performs control processing based on the output values of the unit's main steam pressure module and the main steam pressure intelligent setting module to obtain the output value, including: The first subtraction module performs a subtraction operation based on the output values of the unit's main steam pressure module and the main steam pressure intelligent setting module, and obtains the output value. The first-order inertial module calculates the inertial time based on the output value of the first subtraction module and obtains the output value. The second control submodule performs control processing based on the output value of the inertial pre-module according to the main steam pressure, and obtains the output value, including: The second-order inertial module intelligently sets the output value of the inertial pre-module based on the main steam pressure, performs inertial time judgment and calculation, and obtains the output value. The first function module performs function calculations based on the output value of the inertial front module according to the main steam pressure and obtains the output value. The first multiplication module performs multiplication operations based on the output values of the second first-order inertial module and the first function module, and obtains the output value. The third control submodule performs control processing based on the output value of the primary frequency regulation preload command module and obtains the output value, including: The third-order inertial module calculates the inertial time based on the output value of the first-order frequency modulation preload command module and obtains the output value. The second function module performs function calculations based on the output value of the primary frequency modulation preload instruction module and obtains the output value. The second multiplication module performs multiplication operations based on the output values of the third first-order inertia module and the second function module, and obtains the output value.
[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a fuel main feedforward intelligent regulation and control system and method for thermal power units before frequency regulation. The system provides a dedicated frequency regulation channel for the fuel main feedforward and uses a control module to process and control the outputs of the unit's main steam pressure module, main steam pressure intelligent setting module, main steam pressure intelligent setting inertial pre-module, and primary frequency regulation pre-load command module. It combines the load demand converted from grid frequency deviation with the main steam pressure deviation, enabling early intervention and dynamic compensation before frequency regulation occurs. This balances the speed of primary frequency regulation with the stability of unit operation, allowing the boiler or turbine to adjust its output, thereby stabilizing the grid frequency while minimizing impact on main steam pressure stability, improving the frequency regulation performance of the thermal power unit, and ensuring the safe and stable operation of the unit. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the modules of the intelligent regulation and control system for fuel main feedforward before frequency regulation of thermal power units provided in an embodiment of the present invention; Figure 2 A graph showing the change in grid frequency obtained during the implementation of the intelligent regulation and control system for fuel feedforward before frequency regulation of a thermal power unit provided in this embodiment of the invention. Among them: 001-Main steam pressure module; 002-Intelligent setting module for main steam pressure; 003-Intelligent setting module for main steam pressure before inertia; 004-Load command module before primary frequency regulation; 005-First subtraction module; 006-First first-order inertia module; 007-Second first-order inertia module; 008-First function module; 009-First multiplication module; 010-Third first-order inertia module; 011-Second function module; 012-Second multiplication module; 013-Coordinated control mode module; 014-First switching module; 015-First constant module; 016-Second switching module; 017-Second constant module; 018-Third switching module; 019-Third constant module; 020-First addition module; 021-Fuel main control feedforward intelligent regulation control module before primary frequency regulation. Detailed Implementation
[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0019] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1 See appendix Figure 1 The present invention provides an intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation, comprising: a main steam pressure module 001, a main steam pressure intelligent setting module 002, a main steam pressure intelligent setting inertial feedforward module 003, a load command module before primary frequency regulation 004, a control module, and a fuel main control feedforward intelligent regulation and control module 021 before primary frequency regulation, wherein: The output terminals of the main steam pressure module 001, the main steam pressure intelligent setting module 002, the main steam pressure intelligent setting inertial front module 003, and the primary frequency regulation front load command module 004 are connected to the input terminal of the control module. The output terminal of the control module is connected to the input terminal of the primary frequency regulation front fuel main control feedforward intelligent regulation control module 021.
[0020] In this embodiment, by providing a dedicated frequency regulation channel for the main fuel feedforward, the control module processes and controls the outputs of the unit's main steam pressure module, main steam pressure intelligent setting module, main steam pressure intelligent setting inertial front module, and primary frequency regulation front load command module. By combining the load demand converted from the grid frequency deviation with the main steam pressure deviation, dynamic compensation can be achieved in advance before the frequency regulation action occurs. This balances the speed of primary frequency regulation with the stability of unit operation, allowing the unit's boiler or turbine to adjust its output. This stabilizes the grid frequency while minimizing the impact on the stability of the main steam pressure, thereby improving the frequency regulation performance of the thermal power unit and ensuring the safe and stable operation of the unit.
[0021] The intelligent regulation and control method for fuel master feedforward before frequency regulation of thermal power units using the aforementioned system includes the following steps: The control module performs control processing based on the output values of the main steam pressure module 001, the main steam pressure intelligent setting module 002, the main steam pressure intelligent setting inertial front module 003, and the primary frequency regulation front load command module 004, and obtains the output value. Before the first frequency regulation, the fuel master control feedforward intelligent regulation control module 021 outputs according to the output value of the control module to achieve control.
[0022] Example 2 See appendix Figure 1 The present invention provides an intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation. The control module includes a first control submodule, a second control submodule, a third control submodule, and a first adder module, wherein: The output terminals of the main steam pressure module 001 and the main steam pressure intelligent setting module 002 are connected to the input terminal of the first control submodule; The output of the main steam pressure intelligent setting inertial front module 003 is connected to the input of the second control submodule; The output of the primary frequency regulation preload command module 004 is connected to the input of the third control submodule; The output terminals of the first control submodule, the second control submodule, and the third control submodule are connected to the input terminal of the first adder module 020; The output of the first adder module 020 is connected to the input of the fuel main control feedforward intelligent regulation control module 021 before primary frequency regulation.
[0023] The intelligent regulation and control method for fuel master feedforward before frequency regulation of thermal power units using the aforementioned system includes the following steps: The control module processes the output values from the main steam pressure module 001, the main steam pressure intelligent setting module 002, the main steam pressure intelligent setting inertial front module 003, and the primary frequency regulation front load command module 04 to obtain the output values, including: The first control submodule performs control processing based on the output values of the main steam pressure module 001 and the main steam pressure intelligent setting module 002, and obtains the output value. The second control submodule performs control processing based on the output value of the inertial front module 003, which is intelligently set according to the main steam pressure, and obtains the output value. The third control submodule performs control processing based on the output value of the primary frequency modulation preload command module 004 and obtains the output value; The first addition module 020 performs addition operations based on the output values of the first control submodule, the second control submodule, and the third control submodule, and obtains the output value. The primary frequency regulation pre-control fuel main control feedforward intelligent regulation control module 021 outputs control based on the output value of the control module, including: Before the first frequency regulation, the fuel master control feedforward intelligent regulation control module 021 outputs according to the output value of the first adder module 020 to achieve control.
[0024] Example 3 See appendix Figure 1 The embodiments of the present invention provide a fuel main feedforward intelligent regulation and control system for thermal power units before frequency regulation. The first control submodule includes a first subtraction module 005 and a first first-order inertial module 006, wherein: The input terminal of the first subtraction module 005 is connected to the output terminals of the main steam pressure module 001 and the main steam pressure intelligent setting module 002. The output terminal of the first subtraction module 005 is connected to the input terminal of the first first-order inertia module 006. The output terminal of the first first-order inertia module 006 is connected to the input terminal of the first addition module 020.
[0025] The second control submodule includes a second first-order inertial module 007, a first function module 008, and a first multiplication module 009, wherein: The input terminals of the second first-order inertial module 007 and the first function module 008 are respectively connected to the output terminal of the main steam pressure intelligent setting inertial front module 003. The output terminals of the second first-order inertial module 007 and the first function module 008 are connected to the input terminal of the first multiplication module 009. The output terminal of the first multiplication module 009 is connected to the input terminal of the first addition module 020.
[0026] The third control submodule includes a third first-order inertial module 010, a second function module 011, and a second multiplication module 012, wherein: The input terminals of the third first-order inertial module 010 and the second function module 011 are respectively connected to the output terminal of the first frequency modulation preload command module 004. The output terminals of the third first-order inertial module 010 and the second function module 011 are connected to the input terminal of the second multiplication module 012. The output terminal of the second multiplication module 012 is connected to the input terminal of the first addition module 020.
[0027] The foregoing embodiments detail the sub-modules of the control module. The three sub-modules, in application, correspond to the intelligent fuel feedforward regulation control method for thermal power units before frequency regulation, including the following steps: The first control submodule performs control processing based on the output values of the main steam pressure module 001 and the main steam pressure intelligent setting module 002, and obtains the output values, including: The first subtraction module 005 performs subtraction operations based on the output values of the main steam pressure module 001 and the main steam pressure intelligent setting module 002 and obtains the output value. The first-order inertial module 006 calculates the inertial time based on the output value of the first subtraction module 005 and obtains the output value.
[0028] The second control submodule performs control processing based on the output value of the inertial pre-module 003, which is intelligently set according to the main steam pressure, and obtains the output value, including: The second-order inertial module 007 calculates the inertial time based on the output value of the inertial pre-module 003 according to the main steam pressure and obtains the output value. The first function module 008 performs function calculations based on the output value of the inertial front module 003, which is intelligently set according to the main steam pressure, and obtains the output value. The first multiplication module 009 performs multiplication operations based on the output values of the second first-order inertial module 007 and the first function module 008, and obtains the output value.
[0029] The third control submodule performs control processing based on the output value of the primary frequency regulation preload command module 004 and obtains the output value, including: The third-order inertial module 010 calculates the inertial time based on the output value of the first-order frequency modulation preload command module 004 and obtains the output value. The second function module 011 performs function calculations based on the output value of the primary frequency modulation preload instruction module 004 and obtains the output value; The second multiplication module 012 performs multiplication operations based on the output values of the third first-order inertia module 010 and the second function module 011, and obtains the output value.
[0030] In one embodiment, the control module further includes multiple switching modules and multiple constant modules, wherein: The outputs of the first, second, and third control submodules are each connected to the Y-terminal of a switching module. The N-terminal of each switching module is connected to the output of a constant module. The output of each switching module is connected to the input of the first addition module. (See attached diagram.) Figure 1 As shown, the multiple switching modules are designated as the first switching module 014, the second switching module 016, and the third switching module 018, with corresponding constant modules of the first constant module 015, the second constant module 017, and the third constant module 019. The switching of these modules is triggered by a coordination control mode module 013. In other words, the control module also includes a coordination control mode module 013, whose output is connected to the enable trigger terminals of the multiple switching modules. Through the triggering of the coordination control mode, the switching modules can select their output between their Y and N terminals. The setting of the constant modules ensures that the switching modules have a definite output under different conditions, ensuring stable system operation.
[0031] See appendix Figure 1 The principle of the control method of the present invention will be further described in the appendix. Figure 1 In the illustrated embodiment, the intelligent regulation and control method for fuel master feedforward before frequency regulation of thermal power units provided by the present invention comprises the following steps when executing the intelligent regulation and control method for fuel master feedforward before frequency regulation of thermal power units: 1) The main steam pressure module 001 and the main steam pressure intelligent setting module 002 of the unit are both input to the first subtraction module 005. The output value is obtained after the two input values are subtracted.
[0032] 2) The output of the first subtraction module 005 is input to the first first-order inertia module 006, and the output value is obtained after the inertia time judgment calculation.
[0033] 3) The output terminals of the coordinated control mode module 013, the first first-order inertial module 006, and the first constant module 015 are respectively input to the enable trigger terminal, the "Y" terminal, and the "N" terminal of the first switching module 014. When the output of the coordinated control mode module 013 is "1", the output of the first switching module 014 is the output value of the first first-order inertial module 006. When the output of the coordinated control mode module 013 is "0", the output of the first switching module 014 is the first constant module 015.
[0034] 4) The main steam pressure intelligent setting inertia module 003 is respectively input to the second first-order inertia module 007 and the first function module 008. The second first-order inertia module 007 is used to perform inertia time judgment calculation to obtain the output value, and the first function module 008 is used to perform function calculation to obtain the output value.
[0035] 5) The output of the second first-order inertial module 007 and the output of the first function module 008 are both input to the first multiplication module 009, and the output value is obtained by multiplying using the first multiplication module 009.
[0036] 6) The output terminals of the coordination control module 013, the first multiplication module 009, and the second constant module 017 are respectively input to the enable trigger terminal, the "Y" terminal, and the "N" terminal of the second switching module 016. When the output of the coordination control module 013 is "1", the output of the second switching module 016 is the output value of the first multiplication module 009. When the output of the coordination control module 013 is "0", the output of the second switching module 016 is the second constant module 017.
[0037] 7) The load command module 004 before the frequency modulation is respectively input to the third first-order inertial module 010 and the second function module 011. The third first-order inertial module 010 is used to perform inertial time judgment calculation to obtain the output value, and the second function module 011 is used to perform function calculation to obtain the output value.
[0038] 8) The output of the third first-order inertial module 010 and the output of the second function module 011 are both input to the second multiplication module 012, and the output value is obtained by multiplying using the second multiplication module 012.
[0039] 9) The output terminals of the coordination control module 013, the second multiplication module 012, and the third constant module 019 are respectively input to the enable trigger terminal, the "Y" terminal, and the "N" terminal of the third switching module 018. When the output of the coordination control module 013 is "1", the output of the third switching module 018 is the output value of the second multiplication module 012. When the output of the coordination control module 013 is "0", the output of the third switching module 018 is the third constant module 019.
[0040] 10) The output terminals of the first switching module 014, the second switching module 016, and the third switching module 018 are all input to the first addition module 020, and the first addition module 020 is used to perform addition calculations to obtain the output value.
[0041] 11) The output of the first addition module 020 is input to the fuel master control feedforward intelligent regulation control module 021 before the primary frequency regulation.
[0042] By implementing and applying the technology of this invention in the unit operation control process, a power grid frequency variation diagram is obtained, as shown in the attached diagram. Figure 2As shown in the figure, within the test duration range of 0-1600s, the power grid frequency exhibits characteristics of continuous deviation, multi-segment random fluctuations, and wide-amplitude dynamic disturbances: In the initial stage of the test (0-400s): the frequency deviation starts from near 0Hz and slowly increases, accompanied by high-frequency small-amplitude noise fluctuations throughout, showing an overall slow upward trend; In the middle range (400-1200s): the frequency deviation stabilizes and oscillates within the range of 0.1-0.3Hz, with multiple sudden disturbances of sudden drops and rises (typically, a deep trough around 1000s), which are continuous frequency deviations caused by continuous load disturbances of the power grid; In the later range (1200-1600s): the frequency deviation fluctuation amplitude is significantly amplified, reaching the full-cycle peak (deviation exceeding 0.4Hz) around 1300s, and then rapidly declines and decays, showing an overall non-stationary dynamic frequency deviation characteristic of first continuously rising, wide-amplitude oscillations, sudden peaks, and later decay. This invention relates to a fuel feedforward regulation method and system that can intervene in advance before frequency regulation occurs, provide intelligent dynamic compensation, and coordinate boiler and turbine energy. This system can effectively and stably control frequency fluctuations, avoid ineffective oscillations and interference, and has important engineering significance for improving the frequency regulation performance of thermal power units and ensuring the safe and stable operation of the units.
[0043] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.
Claims
1. A fuel main feedforward intelligent regulation and control system for thermal power units before frequency regulation, characterized in that, include: The unit includes a main steam pressure module, a main steam pressure intelligent setting module, a main steam pressure intelligent setting inertial front module, a primary frequency regulation front load command module, a control module, and a primary frequency regulation front fuel main control feedforward intelligent regulation control module, among which: The output terminals of the main steam pressure module, the main steam pressure intelligent setting module, the main steam pressure intelligent setting inertial front module, and the primary frequency regulation front load command module are connected to the input terminal of the control module, and the output terminal of the control module is connected to the input terminal of the primary frequency regulation front fuel main control feedforward intelligent regulation control module.
2. The intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation according to claim 1, characterized in that, The control module includes a first control submodule, a second control submodule, a third control submodule, and a first addition module, wherein: The output terminals of the main steam pressure module and the main steam pressure intelligent setting module are connected to the input terminal of the first control submodule. The output of the main steam pressure intelligent setting inertial front module is connected to the input of the second control submodule; The output of the primary frequency modulation preload command module is connected to the input of the third control submodule; The output terminals of the first control submodule, the second control submodule, and the third control submodule are connected to the input terminal of the first addition module; The output of the first addition module is connected to the input of the fuel master control feedforward intelligent regulation control module before primary frequency regulation.
3. The intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation according to claim 2, characterized in that, The first control submodule includes a first subtraction module and a first first-order inertial module, wherein: The input terminal of the first subtraction module is connected to the output terminal of the main steam pressure module and the main steam pressure intelligent setting module. The output terminal of the first subtraction module is connected to the input terminal of the first first-order inertial module. The output terminal of the first first-order inertial module is connected to the input terminal of the first addition module.
4. The intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation according to claim 2, characterized in that, The second control submodule includes a second first-order inertial module, a first function module, and a first multiplication module, wherein: The input terminals of the second first-order inertial module and the first function module are respectively connected to the output terminal of the main steam pressure intelligent setting inertial module. The output terminals of the second first-order inertial module and the first function module are connected to the input terminal of the first multiplication module. The output terminal of the first multiplication module is connected to the input terminal of the first addition module.
5. The intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation according to claim 2, characterized in that, The third control submodule includes a third first-order inertial module, a second function module, and a second multiplication module, wherein: The input terminals of the third first-order inertial module and the second function module are respectively connected to the output terminal of the first frequency modulation preload command module. The output terminals of the third first-order inertial module and the second function module are connected to the input terminal of the second multiplication module. The output terminal of the second multiplication module is connected to the input terminal of the first addition module.
6. The intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation according to claim 2, characterized in that, The control module also includes multiple switching modules and multiple constant modules, wherein: The output terminals of the first control submodule, the second control submodule, and the third control submodule are respectively connected to the Y terminal of a switching module, the N terminal of each switching module is respectively connected to the output terminal of a constant module, and the output terminal of the switching module is connected to the input terminal of the first addition module.
7. The intelligent fuel feedforward regulation and control system for thermal power units before frequency regulation according to claim 6, characterized in that, The control module also includes a coordination control mode module, the output of which is connected to the enable trigger terminals of the multiple switching modules.
8. A method for intelligent regulation and control of fuel master feedforward before frequency regulation of thermal power units, characterized in that, Includes the following steps: The control module performs control processing based on the output values of the unit's main steam pressure module, main steam pressure intelligent setting module, main steam pressure intelligent setting inertial front module, and primary frequency regulation front load command module, and obtains the output value. Before the first frequency regulation, the fuel master control feedforward intelligent regulation control module outputs according to the output value of the control module to achieve control.
9. The intelligent regulation and control method for fuel master feedforward before frequency regulation of thermal power units according to claim 8, characterized in that, The control module processes the output values from the main steam pressure module, the main steam pressure intelligent setting module, the main steam pressure intelligent setting inertial front module, and the primary frequency regulation front load command module to obtain the output values, including: The first control submodule performs control processing based on the output values of the unit's main steam pressure module and the main steam pressure intelligent setting module, and obtains the output value. The second control submodule intelligently sets the output value of the inertial front module based on the main steam pressure, performs control processing, and obtains the output value. The third control submodule performs control processing based on the output value of the primary frequency modulation preload command module and obtains the output value; The first addition module performs addition operations based on the output values of the first control submodule, the second control submodule, and the third control submodule, and obtains the output value. The primary frequency regulation pre-control fuel master control feedforward intelligent regulation control module outputs based on the output value of the control module to achieve control, including: Before the first frequency regulation, the fuel master control feedforward intelligent regulation control module outputs according to the output value of the first adder module to achieve control.
10. The intelligent regulation and control method for fuel master feedforward before frequency regulation of thermal power units according to claim 9, characterized in that, The first control submodule performs control processing based on the output values of the unit's main steam pressure module and the main steam pressure intelligent setting module, and obtains the output value, including: The first subtraction module performs a subtraction operation based on the output values of the unit's main steam pressure module and the main steam pressure intelligent setting module, and obtains the output value. The first-order inertial module performs inertial time determination calculation based on the output value of the first subtraction module and obtains the output value; The second control submodule performs control processing based on the output value of the inertial pre-module according to the main steam pressure intelligent setting and obtains the output value, including: The second-order inertial module intelligently sets the output value of the inertial pre-module based on the main steam pressure, calculates the inertial time, and obtains the output value. The first function module performs function calculations based on the output value of the inertial front module according to the main steam pressure and obtains the output value. The first multiplication module performs a multiplication operation based on the output values of the second first-order inertial module and the first function module, and obtains the output value. The third control submodule performs control processing based on the output value of the primary frequency modulation preload command module and obtains the output value, including: The third-order inertial module calculates the inertial time based on the output value of the first-order frequency modulation preload command module and obtains the output value. The second function module performs function calculations based on the output value of the primary frequency modulation preload instruction module and obtains the output value. The second multiplication module performs multiplication operations based on the output values of the third first-order inertial module and the second function module to obtain the output value.