Coal-fired thermal power generating unit control system, method, equipment and medium

Abstract

The embodiment of the invention provides a coal-fired thermal power generating unit control system, method, equipment and medium, and belongs to the technical field of thermal power generation. The system comprises a signal acquisition, adjustment, correction and control module which is used for processing load signals of a power grid and a coal-fired thermal power generating unit. And by analyzing load signal deviation and calculating an interaction influence value and an influence factor, comprehensive correction control of load increasing / decreasing is realized. And the control module generates a fuel supply quantity signal according to the corrected load signal deviation influence value so as to adjust the fuel control system. According to the invention, by collecting and analyzing the power grid load signal in real time and adopting a comprehensive control strategy, the load regulation speed and precision are improved, the system stability is enhanced, the fuel supply is optimized, the economic benefit is improved, and the power grid demand is met.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to a control system for a coal-fired thermal power unit, a control method for a coal-fired thermal power unit, an electronic device and a computer-readable storage medium. Background Art

[0002] Against the backdrop of global energy structural transformation, my country's new energy industry has ushered in unprecedented development opportunities. The proportion of clean energy such as wind and solar energy in power generation has continued to increase, making positive contributions to my country's energy structural adjustment and environmental protection. However, the intermittent and volatile characteristics of new energy power generation have brought many challenges to the stable operation of the power grid.

[0003] On the one hand, the problem of new energy consumption is becoming increasingly prominent. When wind and solar energy resources are abundant, the amount of new energy power generation increases significantly, but the power grid cannot fully absorb this power in a short period of time, resulting in some new energy power not being fully utilized. On the other hand, the peak load regulation pressure of the power grid is increasing. The volatility of new energy power generation requires the power grid to frequently adjust the load of thermal generators to ensure the balance of supply and demand in the power system. In order to effectively deal with this problem, coal-fired power generation companies are deeply involved in the peak load regulation of the power grid to improve the flexibility and reliability of the power grid.

[0004] At present, clear energy-saving transformation or elimination requirements have been put forward for high-coal-consuming units. At the same time, the importance of flexibility transformation of coal-fired units has been emphasized, aiming to improve the system regulation capacity and promote the consumption of clean energy through large-scale technological transformation.

[0005] However, the load control of coal-consuming units cannot adapt to the dynamic changes of 30% to 100% wide load conditions, resulting in the inability of coal-consuming units to operate safely and stably. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a control system, method, device and medium for a coal-fired power plant to solve the above problems.

[0007] In order to achieve the above object, an embodiment of the present invention provides a control system for a coal-fired thermal power plant, comprising: A signal acquisition module, used to collect power grid system load signals, power grid system target load signals, steam pressure signals of coal-fired thermal power units, and target steam pressure signals of coal-fired thermal power units; A load increase regulation module, used for determining a load increase signal deviation interaction impact value based on a power grid system load signal and a power grid system target load signal; A load-increasing steam pressure correction module is used to determine a load-increasing load signal deviation influencing factor based on a power grid system load signal, a steam pressure signal of a coal-fired thermal power unit, and a target steam pressure signal of a coal-fired thermal power unit; The load-raising comprehensive correction control module is used to calculate the product of the load-raising load signal deviation interactive impact value and the load-raising load signal deviation impact factor to obtain the load-raising load signal deviation impact value, and when receiving the CCS mode command signal of the load-raising coal-fired power unit and the load-raising command adjustment signal of the power grid system, the load-raising load signal deviation impact value is sent to the control module; A load reduction adjustment module, used for determining a load reduction load signal deviation interaction impact value based on a power grid system load signal and a power grid system target load signal; A load reduction steam pressure correction module is connected to the output end of the signal acquisition module and is used to determine a load reduction load signal deviation influencing factor based on a power grid system load signal, a steam pressure signal of a coal-fired thermal power unit, and a target steam pressure signal of a coal-fired thermal power unit; The load reduction comprehensive correction control module is used to calculate the product of the load reduction load signal deviation interaction impact value and the load reduction load signal deviation impact factor to obtain the load reduction load signal deviation impact value, and when receiving the CCS mode command signal of the load reduction coal-fired power unit and the power grid system load reduction command adjustment signal, the load reduction load signal deviation impact value is sent to the control module; A control module, used to calculate the product of the load signal deviation influence value of the load increase and a preset correction coefficient to obtain the corrected load signal deviation influence value of the load increase, and generate a load-increase fuel supply amount signal of the fuel control system based on the corrected load signal deviation influence value of the load increase; or The product of the load signal deviation influence value of the load reduction and the preset correction coefficient is calculated to obtain the corrected load signal deviation influence value of the load reduction, and based on the corrected load signal deviation influence value of the load reduction, a load reduction fuel supply amount signal of the fuel control system is generated.

[0008] Optionally, the load increase comprehensive correction control module is further used to send a preset first load increase signal deviation influence value to the control module when no load increase instruction adjustment signal is received; or When receiving the load increase instruction adjustment signal, sending the preset second load increase signal deviation influence value as the load increase signal deviation influence value to the control module; The load reduction comprehensive correction control module is further used to send a preset first load reduction signal deviation impact value to the control module when no load reduction instruction adjustment signal is received; or When the load reduction instruction adjustment signal is received, the preset second load reduction signal deviation impact value is sent to the control module.

[0009] Optionally, the signal acquisition module includes: a load instruction primary frequency modulation collector, a target load collector, a machine front pressure collector, and a machine front target pressure collector; The first output end of the collector before the load instruction is modulated once is connected to the first input end of the load raising regulation module, the first output end of the target load collector is connected to the second input end of the load raising regulation module, the second output end of the collector before the load instruction is modulated once is connected to the first input end of the load raising steam pressure correction module, the first output end of the pressure collector in front of the machine is connected to the second input end of the load raising steam pressure correction module, the first output end of the target pressure collector in front of the machine is connected to the third input end of the load raising steam pressure correction module, the third output end of the collector before the load instruction is modulated once is connected to the first input end of the load lowering regulation module, the second output end of the target load collector is connected to the second input end of the load lowering regulation module, the fourth output end of the collector before the load instruction is modulated once is connected to the first input end of the load lowering steam pressure correction module, the second output end of the pressure collector in front of the machine is connected to the second input end of the load lowering steam pressure correction module, and the target pressure collector in front of the machine is connected to the third input end of the load lowering steam pressure correction module; The load command primary frequency modulation collector is used for the load signal of the power grid system; The target load collector is used to collect the target load signal of the power grid system; The pre-machine pressure collector is used to collect steam pressure signals of coal-fired power units; The target pressure collector in front of the machine is used to collect the target steam pressure signal of the coal-fired power unit.

[0010] Optionally, the load-raising regulation module includes: a first linear converter, a first lead-lag processor, a first subtractor, a second subtractor, a first absolute value converter, a first function converter and a first multiplier; The load reduction regulation module includes: a second linear converter, a second lead-lag processor, a fourth subtractor, a fifth subtractor, a second absolute value converter, a fourth function converter and a fourth multiplier; The input end of the first linear converter is connected to the first output end of the load instruction primary frequency modulation collector, the output end of the first linear converter is respectively connected to the input end of the first lead-lag processor, the first input end of the first subtractor and the first input end of the second subtractor, the output end of the first lead-lag processor is connected to the second input end of the first subtractor, the output end of the first subtractor is connected to the first input end of the first multiplier, the second input end of the second subtractor is connected to the first output end of the target load collector, the output end of the second subtractor is connected to the input end of the first absolute value converter, the output end of the first absolute value converter is connected to the input end of the first function converter, the output end of the first function converter is connected to the second input end of the first multiplier, and the output end of the first multiplier is connected to the first input end of the load comprehensive correction control module; The input end of the second linear converter is connected to the second output end of the load instruction primary frequency modulation collector, the output end of the second linear converter is respectively connected to the input end of the second lead-lag processor, the first input end of the fourth subtractor and the first input end of the fifth subtractor, the output end of the second lead-lag processor is connected to the second input end of the fourth subtractor, the output end of the fourth subtractor is connected to the first input end of the fourth multiplier, the second input end of the fifth subtractor is connected to the second output end of the target load collector, the output end of the fifth subtractor is connected to the input end of the second absolute value converter, the output end of the second absolute value converter is connected to the input end of the fourth function converter, the output end of the fourth function converter is connected to the second input end of the fourth multiplier, and the output end of the fourth multiplier is connected to the first input end of the load reduction comprehensive correction control module; The first linear converter is used to perform load-increasing linear conversion processing on the load signal of the power grid system to obtain the load signal of the power grid system after the load-increasing linear conversion processing; The first lead-lag processor is used to perform load-increasing lead-lag processing on the load signal of the power grid system after the load-increasing linear transformation processing, so as to obtain the load signal of the power grid system after the load-increasing lead-lag processing; The first subtractor is used to calculate the difference between the load signal of the power grid system after the load increase leading and lagging processing and the load signal of the power grid system after the load increase linear transformation processing, and obtain the load increase load signal comparison deviation value; The second subtractor is used to calculate the difference between the load signal of the power grid system after the load-increasing linear transformation and the target load signal of the power grid system to obtain the load-increasing load signal prediction deviation value; The first absolute value converter is used to convert the absolute value of the load signal prediction deviation value of the load increase to obtain the absolute value of the load signal prediction deviation value of the load increase; The first function converter is used to perform load-raising function conversion processing on the absolute value of the load signal prediction deviation value to obtain the load signal prediction deviation value after the load-raising function conversion processing; The first multiplier is used to calculate the product of the load signal prediction deviation value after the load-raising function transformation processing and the load signal comparison deviation value of the load-raising load to obtain the load signal deviation interaction influence value of the load-raising load; The second lead-lag processor is used to perform load reduction lead-lag processing on the load signal of the power grid system after the load reduction linear transformation processing, so as to obtain the load signal of the power grid system after the load reduction lead-lag processing; The fourth subtractor is used to calculate the difference between the load signal of the power grid system after the load reduction leading and lagging processing and the load signal of the power grid system after the load reduction linear transformation processing, so as to obtain the load reduction load signal comparison deviation value; The fifth subtractor is used to calculate the difference between the load signal of the power grid system after the load reduction linear transformation processing and the target load signal of the power grid system to obtain the load reduction load signal prediction deviation value; The second absolute value converter is used to convert the load signal prediction deviation value of the load reduction to an absolute value to obtain the absolute value of the load signal prediction deviation value of the load reduction; The fourth function converter is used to perform load reduction function conversion processing on the absolute value of the load reduction signal prediction deviation value to obtain the load signal prediction deviation value after the load reduction function conversion processing; The fourth multiplier is used to calculate the product of the load signal prediction deviation value after the load reduction function transformation processing and the load reduction load signal comparison deviation value to obtain the load reduction load signal deviation interaction influence value.

[0011] Optionally, the load-raising steam pressure correction module includes: a second function converter, a third subtractor, a third function converter and a third multiplier; The load reduction steam pressure correction module includes: a fifth function converter, a sixth subtractor, a sixth function converter and a sixth multiplier; The input end of the second function converter is connected to the third output end of the collector before the load instruction primary frequency modulation, the output end of the second function converter is connected to the first input end of the third multiplier, the first input end of the third subtractor is connected to the first output end of the front pressure collector, the second input end of the third subtractor is connected to the first output end of the front target pressure collector, the output end of the third subtractor is connected to the input end of the third function converter, the output end of the third function converter is connected to the second input end of the third multiplier, and the output end of the third multiplier is connected to the second input end of the load increase comprehensive correction control module; The input end of the fifth function converter is connected to the fourth output end of the collector before the load instruction primary frequency modulation, the output end of the fifth function converter is connected to the first input end of the sixth multiplier, the first input end of the sixth subtractor is connected to the second output end of the front pressure collector, the second input end of the sixth subtractor is connected to the second output end of the front target pressure collector, the output end of the sixth subtractor is connected to the input end of the sixth function converter, the output end of the sixth function converter is connected to the second input end of the sixth multiplier, and the output end of the sixth multiplier is connected to the second input end of the load reduction comprehensive correction control module; The second function converter is used to perform load-raising function conversion processing on the load signal of the power grid system to obtain the load signal of the power grid system after the load-raising function conversion processing; The third subtractor is used to calculate the difference between the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit to obtain a steam signal prediction deviation value; The third function converter is used to perform load-increasing function conversion processing on the steam signal prediction deviation value to obtain the steam signal prediction deviation value after the load-increasing function conversion processing; The third multiplier is used to calculate the product of the predicted deviation value of the steam signal after the load-raising function conversion processing and the load signal of the power grid system after the load-raising function conversion processing, and obtain the load-raising load signal deviation influence factor; The fifth function converter is used to perform load reduction function conversion processing on the power grid system load signal to obtain the power grid system load signal processed by the load reduction function conversion; The sixth subtractor is used to calculate the difference between the steam pressure signal of the coal-fired power plant and the target steam pressure signal of the coal-fired power plant to obtain the steam signal prediction deviation value. The sixth function converter is used to perform load reduction function conversion processing on the steam signal prediction deviation value to obtain the steam signal prediction deviation value after the load reduction function conversion processing; The sixth multiplier is used to calculate the product of the predicted deviation value of the steam signal after the load reduction function conversion processing and the load signal of the power grid system after the load reduction function conversion processing to obtain the load reduction load signal deviation influence factor.

[0012] Optionally, the load-raising integrated correction control module includes: a second multiplier, a first CCS mode setting module, a first time-delay disconnector, a first analog switcher, a first constant setter, a second analog switcher, a load-raising state instruction acquisition module, and a second constant setter; The load reduction comprehensive correction control module includes: a fifth multiplier, a second CCS mode setting module, a second delay disconnector, a third simulator switcher, a third constant setter, a fourth simulation switcher, a load reduction state instruction command acquisition module and a fourth constant setter; The first input end of the second multiplier is connected to the output end of the first multiplier, the second input end of the second multiplier is connected to the output end of the third multiplier, the output end of the second multiplier is connected to the first input end of the first analog switch, the output end of the first CCS mode setting module is connected to the input end of the first delay disconnector, the output end of the first delay disconnector is connected to the second input end of the first analog switch, the output end of the first constant setter is connected to the third input end of the first analog switch, the output end of the first analog switch is connected to the first input end of the second analog switch, the output end of the load state instruction acquisition module is connected to the second input end of the second analog switch, the output end of the second constant setter is connected to the third input end of the second analog switch, and the output end of the second analog switch is connected to the first input end of the control module; The first input end of the fifth multiplier is connected to the output end of the fourth multiplier, the second input end of the fifth multiplier is connected to the output end of the sixth multiplier, the output end of the fifth multiplier is connected to the first input end of the third simulator switch, the output end of the second CCS mode setting module is connected to the input end of the second delay disconnector, the output end of the second delay disconnector is connected to the second input end of the third simulator switch, the output end of the third constant setter is connected to the third input end of the third simulator switch, the output end of the third simulator switch is connected to the first input end of the fourth simulation switch, the output end of the load reduction state instruction acquisition module is connected to the second input end of the fourth simulation switch, the output end of the fourth constant setter is connected to the third input end of the fourth simulation switch, and the output end of the fourth simulation switch is connected to the second input end of the control module; The second multiplier is used to calculate the product of the load signal deviation interaction impact value of the load increase and the load signal deviation impact factor of the load increase to obtain the load signal deviation impact value of the load increase; The first CCS mode setting module is used to collect the CCS mode command signal of the load-increasing coal-fired thermal power unit; The first constant setter is used to set a first preset load signal deviation influence value; The load-raising state command acquisition module is used to collect load-raising command regulation signals of the power grid system; The second constant setter is used to set a second preset load signal deviation impact value; The first time-delay disconnector is used to control the on-off of the CCS mode command signal of the load-increasing coal-fired power unit transmitted to the first analog switch; The first analog switch is used to select the load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired power unit is monitored, and the second analog switch is used to send the load signal deviation impact value to the control module when the load-raising command adjustment signal of the power grid system is monitored; or The first analog switch is used to select the first preset load-increasing load signal deviation impact value when the CCS mode command signal of the load-increasing coal-fired power unit is not detected, and the second analog switch is used to send the first preset load-increasing load signal deviation impact value to the control module when the load-increasing command adjustment signal of the power grid system is detected; or The first analog switch is used to select the load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is monitored, and the second analog switch is used to select the second preset load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is not monitored; The fifth multiplier is used to calculate the product of the load reduction load signal deviation interaction impact value and the load reduction load signal deviation impact factor to obtain the load reduction load signal deviation impact value; The second CCS mode setting module is used to collect the CCS mode command signal of the load reduction coal-fired thermal power unit; The third constant setter is used to set a first preset load reduction load signal deviation influence value; The load reduction state instruction acquisition module is used to collect the load reduction and load reduction instruction adjustment signals of the power grid system; The fourth constant setter is used to set a second preset load reduction load signal deviation influence value; The second time-delay disconnector is used to control the on-off of the CCS mode command signal of the load-reducing coal-fired power unit transmitted to the third analog switch; The third analog switch is used to select the load signal deviation impact value of the load reduction when the CCS mode command signal of the load reduction coal-fired power unit is monitored, and the fourth analog switch is used to send the load signal deviation impact value of the load reduction to the control module when the load increase or decrease command adjustment signal of the power grid system is monitored; or The third analog switch is used to select the first preset load reduction signal deviation impact value when the CCS mode command signal of the load reduction coal-fired power unit is not detected, and the fourth analog switch is used to send the first preset load reduction signal deviation impact value to the control module when the power grid system load reduction command adjustment signal is detected; or The third analog switch is used to select the load reduction signal deviation impact value when the CCS mode command signal of the load reduction coal-fired power unit is monitored, and the fourth analog switch is used to select the second preset load reduction signal deviation impact value when the power grid system load reduction command adjustment signal is not monitored, and send the second preset load reduction signal deviation impact value to the control module.

[0013] Optionally, the control module includes: a seventh multiplier and a fuel acceleration command signaler; The first input end of the seventh multiplier is connected to the output end of the second analog switch, the second input end of the seventh multiplier is connected to the output end of the fourth analog switch, and the output end of the seventh multiplier is connected to the input end of the fuel acceleration command signaler; The seventh multiplier is used to calculate the product of the load signal deviation influence value of the load increase or the load signal deviation influence value of the load decrease and the preset correction coefficient to obtain the corrected load signal deviation influence value of the load increase or the corrected load signal deviation influence value of the load decrease; The fuel acceleration command signaler is used to generate a load-up fuel supply amount signal of the fuel control system or a load-down fuel supply amount signal of the fuel control system based on the corrected load-up load signal deviation influence value or the corrected load-down load signal deviation influence value.

[0014] In a second aspect of the embodiments of the present invention, a control method for a coal-fired thermal power plant is provided, which is implemented based on the above-mentioned control system for the coal-fired thermal power plant, and includes: Collecting power grid system load signals, power grid system target load signals, coal-fired thermal power unit steam pressure signals and coal-fired thermal power unit target steam pressure signals; Determining a load-raising load signal deviation interactive impact value and a load-dropping load signal deviation interactive impact value based on a power grid system load signal and a power grid system target load signal; Based on the load signal of the power grid system, the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit, a load signal deviation influencing factor for load increase and a load signal deviation influencing factor for load decrease are determined; Calculate the product of the load signal deviation interaction impact value of the load increase and the load signal deviation impact factor of the load increase to obtain the load signal deviation impact value of the load increase, and calculate the product of the load signal deviation interaction impact value of the load decrease and the load signal deviation impact factor of the load decrease to determine the load signal deviation impact value of the load decrease; When receiving the CCS mode command signal of the load-raising coal-fired power unit and the load-raising command adjustment signal of the power grid system, the product of the load-raising load signal deviation influence value and the preset correction coefficient is calculated to obtain the corrected load-raising load signal deviation influence value, and based on the corrected load-raising load signal deviation influence value, the load-raising fuel supply amount signal of the fuel control system is generated; or When the CCS mode command signal of the load reduction coal-fired power unit and the load reduction command adjustment signal of the power grid system are received, the product of the load reduction load signal deviation impact value and the preset correction coefficient is calculated to obtain the corrected load reduction load signal deviation impact value, and based on the corrected load reduction load signal deviation impact value, the load reduction fuel supply signal of the fuel control system is generated.

[0015] In a third aspect of the embodiments of the present invention, an electronic device is provided, comprising: a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the machine-readable instructions are executed by the processor, the above-mentioned coal-fired power plant control method is executed.

[0016] In a fourth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, storing computer instructions, which, when executed on a computer, enable the computer to execute the above-mentioned method for controlling a coal-fired power plant.

[0017] Beneficial effects of the present invention: (1) Improving response speed and accuracy: By collecting and analyzing power grid load signals in real time and introducing comprehensive correction control, fast and accurate load regulation is achieved, significantly improving control accuracy.

[0018] (2) Enhanced system stability: The system uses lead-lag processing and function conversion technology to optimize load change response, and ensures the stability and smoothness of unit operation through the steam pressure correction module.

[0019] (3) Optimizing fuel supply: The control module intelligently adjusts the fuel supply, which not only achieves on-demand energy supply and reduces waste, but also improves combustion efficiency and reduces pollutant emissions.

[0020] (4) Improved economic benefits: By optimizing fuel usage and reducing the number of starts and stops, the efficient operation of the system reduces operating costs and maintenance requirements, and improves the overall economic benefits of the thermal power units.

[0021] (5) Meeting grid demand: The system improves the flexibility and reliability of grid dispatch, ensuring that coal-fired power units can respond quickly to emergencies and meet grid load regulation needs.

[0022] (6) Strong adaptability: The system design takes into account a variety of operating modes and preset parameters, and can adapt to different grid requirements and unit characteristics.

[0023] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 implementations, 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 structural schematic diagram of a control system for a coal-fired thermal power unit provided by an embodiment of the present invention; Figure 2 It is a flow chart of a method for controlling a coal-fired power plant provided in an embodiment of the present invention.

[0025] Description of Reference Numerals 1- Load instruction primary frequency modulation collector; 2- First linear converter; 3-first lead-lag processor; 4-first subtractor; 5-target load collector; 6-a second subtractor; 7-a first absolute value converter; 8-a first function converter; 9-first multiplier; 10-second function converter; 11-front pressure collector; 12-front target pressure collector; 13-third subtractor; 14-third function converter; 15-third multiplier; 16-second multiplier; 17-first CCS mode setting module; 18-first time delay disconnector; 19-first analog quantity switcher; 20-first constant setter; 21-second analog switch; 22-load state instruction acquisition module; 23-a second constant setter; 24-a second linear converter; 25-a second lead-lag processor; 26-a fourth subtractor; 27-a fifth subtractor; 28-a second absolute value converter; 29-fourth function converter; 30-fourth multiplier; 31-fifth function converter; 32-sixth subtractor; 33-sixth function converter; 34-sixth multiplier; 35-fifth multiplier; 36-second CCS mode setting module; 37-second delay disconnector; 38-third simulator switch; 39-third constant setter; 40-fourth simulation switch; 41- load reduction state instruction acquisition module; 42- fourth constant setter; 43-the seventh multiplier; 44-the fuel acceleration command signaler. DETAILED DESCRIPTION

[0026] The specific implementation of the embodiment 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 embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0029] Embodiment 1 The embodiment of the present invention provides a control system for a coal-fired thermal power unit, comprising: a signal acquisition module, which is used to collect a load signal of a power grid system, a target load signal of a power grid system, a steam pressure signal of a coal-fired thermal power unit and a target steam pressure signal of a coal-fired thermal power unit; a load increase regulation module, which is used to determine a load increase load signal deviation interaction impact value based on the power grid system load signal and the power grid system target load signal; a load increase steam pressure correction module, which is used to determine a load increase load signal deviation impact factor based on the power grid system load signal, the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit; a load increase comprehensive correction control module, which is used to calculate the product of the load increase load signal deviation interaction impact value and the load increase load signal deviation impact factor to obtain the load increase load signal deviation impact value, and when receiving a CCS mode command signal of the load increase coal-fired thermal power unit and a power grid system load increase command adjustment signal, send the load increase load signal deviation impact value to the control module; a load reduction regulation module, which is used to determine a load reduction load signal deviation interaction impact value based on the power grid system load signal and the power grid system target load signal; The steam pressure correction module is connected to the output end of the signal acquisition module, and is used to determine the load signal deviation impact factor of the load reduction based on the load signal of the power grid system, the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit; the load reduction comprehensive correction control module is used to calculate the product of the load reduction load signal deviation interaction impact value and the load reduction load signal deviation impact factor to obtain the load reduction load signal deviation impact value, and when receiving the CCS mode instruction signal of the load reduction coal-fired thermal power unit and the power grid system load reduction instruction adjustment signal, the load reduction load signal deviation impact value is sent to the control module; the control module is used to calculate the product of the load increase load signal deviation impact value and the preset correction coefficient to obtain the corrected load increase load signal deviation impact value, and generate the load increase fuel supply amount signal of the fuel control system based on the corrected load increase load signal deviation impact value; or calculate the product of the load increase and decrease load signal deviation impact value and the preset correction coefficient to obtain the corrected load decrease load signal deviation impact value, and generate the load decrease fuel supply amount signal of the fuel control system based on the corrected load decrease load signal deviation impact value.

[0030] In one embodiment, the load increase comprehensive correction control module is also used to send a preset first load increase signal deviation impact value to the control module when the load increase instruction adjustment signal is not received; or when the load increase instruction adjustment signal is received, the preset second load increase signal deviation impact value is sent to the control module as the load increase signal deviation impact value; the load reduction comprehensive correction control module is also used to send a preset first load reduction signal deviation impact value to the control module when the load reduction instruction adjustment signal is not received; or when the load reduction instruction adjustment signal is received, the preset second load reduction signal deviation impact value is sent to the control module.

[0031] In one embodiment, if Figure 1 As shown, the signal acquisition module includes: a load instruction primary frequency modulation collector 1, a target load collector 5, a machine front pressure collector 11 and a machine front target pressure collector 12; the first output end of the load instruction primary frequency modulation collector 1 is connected to the first input end of the load increase regulation module, the first output end of the target load collector 5 is connected to the second input end of the load increase regulation module, the second output end of the load instruction primary frequency modulation collector 1 is connected to the first input end of the load increase steam pressure correction module, the first output end of the machine front pressure collector 11 is connected to the second input end of the load increase steam pressure correction module, the first output end of the machine front target pressure collector 12 is connected to the third input end of the load increase steam pressure correction module, the third output end of the load instruction primary frequency modulation collector 1 is connected to the load decrease steam pressure correction module, and the third output end of the load instruction primary frequency modulation collector 1 is connected to the load decrease steam pressure correction module. The first input end of the load regulation module is connected, the second output end of the target load collector 5 is connected to the second input end of the load reduction regulation module, the fourth output end of the load instruction primary frequency modulation collector 1 is connected to the first input end of the load reduction steam pressure correction module, the second output end of the front-machine pressure collector 11 is connected to the second input end of the load reduction steam pressure correction module, and the front-machine target pressure collector 12 is connected to the third input end of the load reduction steam pressure correction module; the load instruction primary frequency modulation collector 1 is used for the load signal of the power grid system; the target load collector 5 is used to collect the target load signal of the power grid system; the front-machine pressure collector 11 is used to collect the steam pressure signal of the coal-fired thermal power unit; the front-machine target pressure collector 12 is used to collect the target steam pressure signal of the coal-fired thermal power unit.

[0032] In one embodiment, if Figure 1As shown, the load increase regulation module includes: a first linear converter 2, a first lead-lag processor 3, a first subtractor 4, a second subtractor 6, a first absolute value converter 7, a first function converter 8 and a first multiplier 9; the load reduction regulation module includes: a second linear converter 24, a second lead-lag processor 25, a fourth subtractor 26, a fifth subtractor 27, a second absolute value converter 28, a fourth function converter 29 and a fourth multiplier 30; the input end of the first linear converter 2 is connected to the first output end of the load instruction primary frequency modulation collector 1, and the output end of the first linear converter 2 is respectively connected to the input end of the first lead-lag processor 3, the first input end of the first subtractor 4 and the first input end of the second subtractor 6, and the first lead-lag processor 3 is connected to the first input end of the first subtractor 4 and the first input end of the second subtractor 6. The output end of the processor 3 is connected to the second input end of the first subtractor 4, the output end of the first subtractor 4 is connected to the first input end of the first multiplier 9, the second input end of the second subtractor 6 is connected to the first output end of the target load collector 5, the output end of the second subtractor 6 is connected to the input end of the first absolute value converter 7, the output end of the first absolute value converter 7 is connected to the input end of the first function converter 8, the output end of the first function converter 8 is connected to the second input end of the first multiplier 9, and the output end of the first multiplier 9 is connected to the first input end of the load comprehensive correction control module; the input end of the second linear converter 24 is connected to the second output end of the load instruction primary frequency modulation collector 1, and the output ends of the second linear converter 24 are respectively connected to the second leading The input end of the lag processor 25, the first input end of the fourth subtractor 26 and the first input end of the fifth subtractor 27 are connected, the output end of the second lead-lag processor 25 is connected to the second input end of the fourth subtractor 26, the output end of the fourth subtractor 26 is connected to the first input end of the fourth multiplier 30, the second input end of the fifth subtractor 27 is connected to the second output end of the target load collector 5, the output end of the fifth subtractor 27 is connected to the input end of the second absolute value converter 28, the output end of the second absolute value converter 28 is connected to the input end of the fourth function converter 29, the output end of the fourth function converter 29 is connected to the second input end of the fourth multiplier 30, and the output end of the fourth multiplier 30 is connected to the first input end of the load reduction comprehensive correction control module. The first linear converter 2 is used to perform load-raising linear transformation processing on the load signal of the power grid system to obtain the load signal of the power grid system after the load-raising linear transformation processing; the first lead-lag processor 3 is used to perform load-raising lead-lag processing on the load signal of the power grid system after the load-raising linear transformation processing to obtain the load signal of the power grid system after the load-raising lead-lag processing; the first subtractor 4 is used to calculate the difference between the load signal of the power grid system after the load-raising lead-lag processing and the load signal of the power grid system after the load-raising linear transformation processing to obtain the load signal comparison deviation value; the second subtractor 6 is used to calculate the difference between the load signal of the power grid system after the load-raising linear transformation processing and the target load signal of the power grid system to obtain the load signal prediction deviation value;The first absolute value converter 7 is used to convert the absolute value of the load signal prediction deviation value of the load increase to obtain the absolute value of the load signal prediction deviation value of the load increase; the first function converter 8 is used to perform load function conversion processing on the absolute value of the load signal prediction deviation value of the load increase to obtain the load signal prediction deviation value after the load function conversion processing; the first multiplier 9 is used to calculate the product of the load signal prediction deviation value after the load function conversion processing and the load signal comparison deviation value of the load increase to obtain the load signal deviation interaction impact value; the second lead-lag processor 25 is used to perform load reduction lead-lag processing on the power grid system load signal after the load reduction linear conversion processing to obtain the power grid system load signal after the load reduction lead-lag processing; the fourth subtractor 26 is used to calculate the load signal of the power grid system after the load reduction lead-lag processing and the load signal of the load reduction The difference of the load signal of the power grid system after the load linear transformation is used to obtain the load signal comparison deviation value of the load reduction; the fifth subtractor 27 is used to calculate the difference between the load signal of the power grid system after the load linear transformation and the target load signal of the power grid system to obtain the load signal prediction deviation value of the load reduction; the second absolute value converter 28 is used to convert the load signal prediction deviation value of the load reduction to the absolute value to obtain the absolute value of the load signal prediction deviation value of the load reduction; the fourth function converter 29 is used to perform load reduction function transformation on the absolute value of the load signal prediction deviation value of the load reduction to obtain the load signal prediction deviation value after the load reduction function transformation; the fourth multiplier 30 is used to calculate the product of the load signal prediction deviation value after the load reduction function transformation and the load signal comparison deviation value of the load reduction to obtain the load signal deviation interaction impact value. ;

[0033] In one embodiment, if Figure 1As shown, the load-raising steam pressure correction module includes: a second function converter 10, a third subtractor 13, a third function converter 14 and a third multiplier 15; the load-reducing steam pressure correction module includes: a fifth function converter 31, a sixth subtractor 32, a sixth function converter 33 and a sixth multiplier 34; the input end of the second function converter 10 is connected to the third output end of the load instruction primary frequency modulation collector 1, the output end of the second function converter 10 is connected to the first input end of the third multiplier 15, the first input end of the third subtractor 13 is connected to the first output end of the front pressure collector 11, the second input end of the third subtractor 13 is connected to the first output end of the front target pressure collector 12, and the third multiplier 15 is connected to the first input end of the third subtractor 13. The output end of the third subtractor 13 is connected to the input end of the third function converter 14, the output end of the third function converter 14 is connected to the second input end of the third multiplier 15, and the output end of the third multiplier 15 is connected to the second input end of the load increase comprehensive correction control module; the input end of the fifth function converter 31 is connected to the fourth output end of the load instruction primary frequency modulation collector 1, the output end of the fifth function converter 31 is connected to the first input end of the sixth multiplier 34, the first input end of the sixth subtractor 32 is connected to the second output end of the front machine pressure collector 11, the second input end of the sixth subtractor 32 is connected to the second output end of the front machine target pressure collector 12, and the output end of the sixth subtractor 32 is connected to the sixth function The input end of the sixth function converter 33 is connected, the output end of the sixth multiplier 34 is connected to the second input end of the load reduction comprehensive correction control module; the second function converter 10 is used to perform load-raising function conversion processing on the power grid system load signal to obtain the power grid system load signal after the load-raising function conversion processing; the third subtractor 13 is used to calculate the difference between the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit to obtain the steam signal prediction deviation value; the third function converter 14 is used to perform load-raising function conversion processing on the steam signal prediction deviation value to obtain the steam signal prediction deviation value after the load-raising function conversion processing The third multiplier 15 is used to calculate the product of the predicted deviation value of the steam signal after the load-raising function conversion processing and the load signal of the power grid system after the load-raising function conversion processing, and obtain the load signal deviation influencing factor of the load-raising function; the fifth function converter 31 is used to perform load-reducing function conversion processing on the power grid system load signal to obtain the load signal of the power grid system after the load-reducing function conversion processing; the sixth subtractor 32 is used to calculate the difference between the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit to obtain the predicted deviation value of the steam signal; the sixth function converter 33 is used to perform load-reducing function conversion processing on the predicted deviation value of the steam signal to obtain the predicted deviation value of the steam signal after the load-reducing function conversion processing;The sixth multiplier 34 is used to calculate the product of the predicted deviation value of the steam signal after the load reduction function conversion processing and the load signal of the power grid system after the load reduction function conversion processing, and obtain the load reduction load signal deviation influence factor. ;

[0034] In one embodiment, if Figure 1As shown, the load-raising comprehensive correction control module includes: a second multiplier 16, a first CCS mode setting module 17, a first time-delay disconnector 18, a first analog switch 19, a first constant setter 20, a second analog switch 21, a load-raising state instruction acquisition module 22 and a second constant setter 23; the load-lowering comprehensive correction control module includes: a fifth multiplier 35, a second CCS mode setting module 36, a second time-delay disconnector 37, a third simulator switch 38, a third constant setter 39, a fourth analog switch 40, a load-lowering state instruction acquisition module 41 and a fourth constant setter 42; the first input end of the second multiplier 16 is connected to the output end of the first multiplier 9, and the second multiplier 19 is connected to the output end of the first multiplier 9. The second input end of the first CCS mode setting module 17 is connected to the input end of the first delay disconnector 18, the output end of the first delay disconnector 18 is connected to the second input end of the first analog switch 19, the output end of the first constant setter 20 is connected to the third input end of the first analog switch 19, the output end of the first analog switch 19 is connected to the first input end of the second analog switch 21, the output end of the load state instruction acquisition module 22 is connected to the second input end of the second analog switch 21, and the output end of the second constant setter 23 is connected to the third input end of the first analog switch 19. The third input terminal of the analog quantity switch 21 is connected, the output terminal of the second analog quantity switch 21 is connected to the first input terminal of the control module; the first input terminal of the fifth multiplier 35 is connected to the output terminal of the fourth multiplier 30, the second input terminal of the fifth multiplier 35 is connected to the output terminal of the sixth multiplier 34, the output terminal of the fifth multiplier 35 is connected to the first input terminal of the third simulator switch 38, the output terminal of the second CCS mode setting module 36 is connected to the input terminal of the second delay disconnector 37, the output terminal of the second delay disconnector 37 is connected to the second input terminal of the third simulator switch 38, the output terminal of the third constant setter 39 is connected to the third input terminal of the third simulator switch 38, and the output terminal of the third constant setter 39 is connected to the third input terminal of the third simulator switch 38. The output end is connected to the first input end of the fourth analog switch 40, the output end of the load reduction state instruction acquisition module 41 is connected to the second input end of the fourth analog switch 40, the output end of the fourth constant setter 42 is connected to the third input end of the fourth analog switch 40, and the output end of the fourth analog switch 40 is connected to the second input end of the control module; the second multiplier 16 is used to calculate the product of the load signal deviation interaction impact value of the load increase and the load signal deviation impact factor of the load increase to obtain the load signal deviation impact value of the load increase; the first CCS mode setting module 17 is used to collect the CCS mode instruction signal of the load increase coal-fired thermal power unit; the first constant setter 20 is used to set the first preset load signal deviation impact value of the load increase;The load-raising state instruction acquisition module 22 is used to collect the load-raising instruction adjustment signal of the power grid system; the second constant setter 23 is used to set the second preset load-raising load signal deviation impact value; the first time-delay disconnector 18 is used to control the transmission of the CCS mode instruction signal of the load-raising coal-fired thermal power unit to the first analog switch 19 on and off; the first analog switch 19 is used to select the load-raising load signal deviation impact value when the CCS mode instruction signal of the load-raising coal-fired thermal power unit is monitored, and the second analog switch 21 is used to send the load-raising load signal deviation impact value to the control module when the load-raising instruction adjustment signal of the power grid system is monitored; or the first analog switch The device 19 is used to select the first preset load-raising load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is not detected, and the second analog switch 21 is used to send the first preset load-raising load signal deviation impact value to the control module when the load-raising command adjustment signal of the power grid system is detected; or the first analog switch 19 is used to select the load-raising load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is detected, and the second analog switch 21 is used to select the second preset load-raising load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is not detected; the fifth multiplier 35 Used to calculate the product of the load signal deviation interaction impact value and the load signal deviation impact factor to obtain the load signal deviation impact value; the second CCS mode setting module 36 is used to collect the CCS mode command signal of the load reduction coal-fired thermal power unit; the third constant setter 39 is used to set the first preset load reduction load signal deviation impact value; the load reduction state command instruction acquisition module 41 is used to collect the load reduction command adjustment signal of the power grid system; the fourth constant setter 42 is used to set the second preset load reduction load signal deviation impact value; the second delay disconnector 37 is used to control the CCS mode command signal of the load reduction coal-fired thermal power unit to be transmitted to the third analog switch 3 8 is turned on and off; the third analog switch 38 is used to select the load signal deviation impact value when the CCS mode command signal of the load-reducing coal-fired thermal power unit is monitored, and the fourth analog switch 40 is used to send the load signal deviation impact value to the control module when the load-reducing command adjustment signal of the power grid system is monitored; or the third analog switch 38 is used to select the first preset load signal deviation impact value when the CCS mode command signal of the load-reducing coal-fired thermal power unit is not monitored, and the fourth analog switch 40 is used to send the first preset load signal deviation impact value to the control module when the load-reducing command adjustment signal of the power grid system is monitored;Or the third analog switch 38 is used to select the load signal deviation impact value when the CCS mode command signal of the load reduction coal-fired power unit is monitored, and the fourth analog switch 40 is used to select the second preset load signal deviation impact value when the power grid system load reduction command adjustment signal is not monitored, and send the second preset load signal deviation impact value to the control module.;

[0035] In one embodiment, if Figure 1 As shown, the control module includes: a seventh multiplier 43 and a fuel acceleration command signal device 44; the first input end of the seventh multiplier 43 is connected to the output end of the second analog quantity switch 21, the second input end of the seventh multiplier 43 is connected to the output end of the fourth analog quantity switch 40, and the output end of the seventh multiplier 43 is connected to the input end of the fuel acceleration command signal device 44; the seventh multiplier 43 is used to calculate the product of the load signal deviation influence value of the load increase or the load signal deviation influence value and the preset correction coefficient to obtain the corrected load signal deviation influence value of the load increase or the corrected load signal deviation influence value of the load decrease; the fuel acceleration command signal device 44 is used to generate the load increase fuel supply amount signal of the fuel control system or the load decrease fuel supply amount signal of the fuel control system based on the corrected load signal deviation influence value of the load increase or the corrected load signal deviation influence value of the load decrease.

[0036] It should be noted that when the load of a coal-fired supercritical direct current boiler changes, the fuel characteristics differ significantly with load increase and load decrease. This difference exists at the same or different load levels. Therefore, the load increase control and load decrease control of the coal-fired unit will be zoned. However, the overall processing logic between the two is the same. The difference lies in the details of linear processing, function transformation, difference calculation, and product calculation.

[0037] In one embodiment, the specific methods of linear transformation processing, function transformation processing and lead-lag processing under load-up conditions and load-down conditions are not specifically limited in the embodiment of the present invention, and can be reasonably set according to user needs.

[0038] Beneficial effects of the present invention: (1) Improving response speed and accuracy: By collecting and analyzing power grid load signals in real time and introducing comprehensive correction control, fast and accurate load regulation is achieved, significantly improving control accuracy.

[0039] (2) Enhanced system stability: The system uses lead-lag processing and function conversion technology to optimize load change response, and ensures the stability and smoothness of unit operation through the steam pressure correction module.

[0040] (3) Optimizing fuel supply: The control module intelligently adjusts the fuel supply, which not only achieves on-demand energy supply and reduces waste, but also improves combustion efficiency and reduces pollutant emissions.

[0041] (4) Improved economic benefits: By optimizing fuel usage and reducing the number of starts and stops, the efficient operation of the system reduces operating costs and maintenance requirements, and improves the overall economic benefits of the thermal power units.

[0042] (5) Meeting grid demand: The system improves the flexibility and reliability of grid dispatch, ensuring that coal-fired power units can respond quickly to emergencies and meet grid load regulation needs.

[0043] (6) Strong adaptability: The system design takes into account a variety of operating modes and preset parameters, and can adapt to different grid requirements and unit characteristics.

[0044] Embodiment 2 Based on the same inventive concept, Figure 2 As shown, the embodiment of the present invention further provides a control method for a coal-fired thermal power plant, which is implemented based on the above-mentioned control system of the coal-fired thermal power plant, and includes: S100, collecting a power grid system load signal, a power grid system target load signal, a steam pressure signal of a coal-fired thermal power unit, and a target steam pressure signal of a coal-fired thermal power unit; S200, determining a load-up load signal deviation interactive impact value and a load-down load signal deviation interactive impact value based on a power grid system load signal and a power grid system target load signal; S300, determining a load signal deviation influencing factor for load increase and a load signal deviation influencing factor for load decrease based on a load signal of a power grid system, a steam pressure signal of a coal-fired thermal power unit, and a target steam pressure signal of a coal-fired thermal power unit; S400, calculating the product of the load signal deviation interaction impact value of the load increase and the load signal deviation impact factor of the load increase to obtain the load signal deviation impact value of the load increase, and calculating the product of the load signal deviation interaction impact value of the load decrease and the load signal deviation impact factor of the load decrease to determine the load signal deviation impact value of the load decrease; S500, when receiving the CCS mode command signal of the load-raising coal-fired power unit and the load-raising command adjustment signal of the power grid system, calculating the product of the load-raising load signal deviation influence value and the preset correction coefficient, obtaining the corrected load-raising load signal deviation influence value, and generating the load-raising fuel supply amount signal of the fuel control system based on the corrected load-raising load signal deviation influence value; or When the CCS mode command signal of the load reduction coal-fired power unit and the load reduction command adjustment signal of the power grid system are received, the product of the load reduction load signal deviation impact value and the preset correction coefficient is calculated to obtain the corrected load reduction load signal deviation impact value, and based on the corrected load reduction load signal deviation impact value, the load reduction fuel supply signal of the fuel control system is generated.

[0045] It should be understood that the device corresponds to the above-mentioned coal-fired thermal power unit control method embodiment and can execute the various steps involved in the above-mentioned method embodiment. The specific functions of the device can be found in the above description. To avoid repetition, the detailed description is appropriately omitted here. The device includes at least one software function module that can be stored in a memory in the form of software or firmware or solidified in the operating system (OS) of the device.

[0046] Embodiment 3 Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, including: a processor and a memory, the memory storing machine-readable instructions executable by the processor, and the machine-readable instructions executing the above-mentioned coal-fired power plant control method when executed by the processor.

[0047] In a typical configuration, an electronic device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0048] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0049] Computer readable media include permanent and non-permanent, removable and non-removable media that 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 magnetic 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.

[0050] Embodiment 4 Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium storing computer instructions. When the computer instructions are executed on a computer, the computer executes the above-mentioned coal-fired power plant control method.

[0051] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0052] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program 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 computer program instructions. These computer program instructions can be provided to a processor 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 of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. 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.

[0053] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0054] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing 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.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0056] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0057] 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.

[0058] 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 system for a coal-fired power plant, characterized in that: include: A signal acquisition module, used to collect power grid system load signals, power grid system target load signals, steam pressure signals of coal-fired thermal power units, and target steam pressure signals of coal-fired thermal power units; A load increase regulation module, used for determining a load increase signal deviation interaction impact value based on a power grid system load signal and a power grid system target load signal; A load-increasing steam pressure correction module is used to determine a load-increasing load signal deviation influencing factor based on a power grid system load signal, a steam pressure signal of a coal-fired thermal power unit, and a target steam pressure signal of a coal-fired thermal power unit; The load-raising comprehensive correction control module is used to calculate the product of the load-raising load signal deviation interactive impact value and the load-raising load signal deviation impact factor to obtain the load-raising load signal deviation impact value, and when receiving the CCS mode command signal of the load-raising coal-fired power unit and the load-raising command adjustment signal of the power grid system, the load-raising load signal deviation impact value is sent to the control module; A load reduction adjustment module, used for determining a load reduction load signal deviation interaction impact value based on a power grid system load signal and a power grid system target load signal; A load reduction steam pressure correction module is connected to the output end of the signal acquisition module and is used to determine a load reduction load signal deviation influencing factor based on a power grid system load signal, a steam pressure signal of a coal-fired thermal power unit, and a target steam pressure signal of a coal-fired thermal power unit; The load reduction comprehensive correction control module is used to calculate the product of the load reduction load signal deviation interaction impact value and the load reduction load signal deviation impact factor to obtain the load reduction load signal deviation impact value, and when receiving the CCS mode command signal of the load reduction coal-fired power unit and the power grid system load reduction command adjustment signal, the load reduction load signal deviation impact value is sent to the control module; A control module, used for calculating the product of the load signal deviation influence value of the load increase and the preset correction coefficient to obtain the corrected load signal deviation influence value of the load increase, and generating a load fuel supply amount signal of the fuel control system based on the corrected load signal deviation influence value of the load increase; or The product of the load signal deviation influence value of the load reduction and the preset correction coefficient is calculated to obtain the corrected load signal deviation influence value of the load reduction, and based on the corrected load signal deviation influence value of the load reduction, a load reduction fuel supply amount signal of the fuel control system is generated.

2. The control system of a coal-fired power plant according to claim 1, characterized in that: The load increase comprehensive correction control module is further used to send a preset first load increase signal deviation influence value to the control module when no load increase instruction adjustment signal is received; or When receiving the load increase instruction adjustment signal, sending the preset second load increase signal deviation influence value as the load increase signal deviation influence value to the control module; The load reduction comprehensive correction control module is further used to send a preset first load reduction signal deviation impact value to the control module when no load reduction instruction adjustment signal is received; or When the load reduction instruction adjustment signal is received, the preset second load reduction signal deviation impact value is sent to the control module.

3. The control system of a coal-fired power plant according to claim 2, characterized in that: The signal acquisition module comprises: a load instruction primary frequency modulation collector (1), a target load collector (5), a front-machine pressure collector (11) and a front-machine target pressure collector (12); The first output end of the load instruction primary frequency modulation collector (1) is connected to the first input end of the load increase regulation module, the first output end of the target load collector (5) is connected to the second input end of the load increase regulation module, the second output end of the load instruction primary frequency modulation collector (1) is connected to the first input end of the load increase steam pressure correction module, the first output end of the machine front pressure collector (11) is connected to the second input end of the load increase steam pressure correction module, the first output end of the machine front target pressure collector (12) is connected to the third input end of the load increase steam pressure correction module, the third output end of the load instruction primary frequency modulation collector (1) is connected to the first input end of the load reduction regulation module, the second output end of the target load collector (5) is connected to the second input end of the load reduction regulation module, the fourth output end of the load instruction primary frequency modulation collector (1) is connected to the first input end of the load reduction steam pressure correction module, the second output end of the machine front pressure collector (11) is connected to the second input end of the load reduction steam pressure correction module, and the machine front target pressure collector (12) is connected to the third input end of the load reduction steam pressure correction module; The load command primary frequency modulation collector (1) is used for the load signal of the power grid system; The target load collector (5) is used to collect the target load signal of the power grid system; The front-end pressure collector (11) is used to collect the steam pressure signal of the coal-fired power unit; The target pressure collector (12) in front of the machine is used to collect the target steam pressure signal of the coal-fired power unit.

4. The control system of a coal-fired power plant according to claim 3, characterized in that: The load increasing regulation module comprises: a first linear converter (2), a first lead-lag processor (3), a first subtractor (4), a second subtractor (6), a first absolute value converter (7), a first function converter (8) and a first multiplier (9); The load reduction regulation module comprises: a second linear converter (24), a second lead-lag processor (25), a fourth subtractor (26), a fifth subtractor (27), a second absolute value converter (28), a fourth function converter (29) and a fourth multiplier (30); The input end of the first linear converter (2) is connected to the first output end of the load instruction primary frequency modulation collector (1); the output end of the first linear converter (2) is respectively connected to the input end of the first lead-lag processor (3), the first input end of the first subtractor (4) and the first input end of the second subtractor (6); the output end of the first lead-lag processor (3) is connected to the second input end of the first subtractor (4); the output end of the first subtractor (4) is connected to the first input end of the first multiplier (9); the second input end of the second subtractor (6) is connected to the first output end of the target load collector (5); the output end of the second subtractor (6) is connected to the input end of the first absolute value converter (7); the output end of the first absolute value converter (7) is connected to the input end of the first function converter (8); the output end of the first function converter (8) is connected to the second input end of the first multiplier (9); the output end of the first multiplier (9) is connected to the first input end of the load comprehensive correction control module; The input end of the second linear converter (24) is connected to the second output end of the load instruction primary frequency modulation collector (1); the output end of the second linear converter (24) is respectively connected to the input end of the second lead-lag processor (25), the first input end of the fourth subtractor (26) and the first input end of the fifth subtractor (27); the output end of the second lead-lag processor (25) is connected to the second input end of the fourth subtractor (26); the output end of the fourth subtractor (26) is connected to the first input end of the fourth multiplier (30); the second input end of the fifth subtractor (27) is connected to the second output end of the target load collector (5); the output end of the fifth subtractor (27) is connected to the input end of the second absolute value converter (28); the output end of the second absolute value converter (28) is connected to the input end of the fourth function converter (29); the output end of the fourth function converter (29) is connected to the second input end of the fourth multiplier (30); the output end of the fourth multiplier (30) is connected to the first input end of the load reduction comprehensive correction control module; The first linear converter (2) is used to perform load-increasing linear conversion processing on the load signal of the power grid system to obtain the load signal of the power grid system after the load-increasing linear conversion processing; The first lead-lag processor (3) is used to perform load-increasing lead-lag processing on the load signal of the power grid system after the load-increasing linear transformation processing, so as to obtain the load signal of the power grid system after the load-increasing lead-lag processing; The first subtractor (4) is used to calculate the difference between the load signal of the power grid system after the load increase leading and lagging processing and the load signal of the power grid system after the load increase linear transformation processing, so as to obtain a load increase load signal comparison deviation value; The second subtractor (6) is used to calculate the difference between the load signal of the power grid system after the load increase linear transformation processing and the target load signal of the power grid system to obtain the load increase load signal prediction deviation value; The first absolute value converter (7) is used to convert the load signal prediction deviation value of the load increase into an absolute value to obtain the absolute value of the load signal prediction deviation value of the load increase; The first function converter (8) is used to perform a load-raising function transformation process on the absolute value of the load signal prediction deviation value to obtain the load signal prediction deviation value after the load-raising function transformation process; The first multiplier (9) is used to calculate the product of the load signal prediction deviation value after the load-raising function transformation processing and the load-raising load signal comparison deviation value to obtain the load-raising load signal deviation interaction influence value; The second lead-lag processor (25) is used to perform load reduction lead-lag processing on the load signal of the power grid system after the load reduction linear transformation processing, so as to obtain the load signal of the power grid system after the load reduction lead-lag processing; The fourth subtractor (26) is used to calculate the difference between the load signal of the power grid system after the load reduction leading and lagging processing and the load signal of the power grid system after the load reduction linear transformation processing, so as to obtain a load reduction load signal comparison deviation value; The fifth subtractor (27) is used to calculate the difference between the load signal of the power grid system after the load reduction linear transformation processing and the target load signal of the power grid system to obtain the load reduction load signal prediction deviation value; The second absolute value converter (28) is used to convert the load signal prediction deviation value of the load reduction into an absolute value to obtain the absolute value of the load signal prediction deviation value of the load reduction; The fourth function converter (29) is used to perform load reduction function transformation processing on the absolute value of the load reduction signal prediction deviation value to obtain the load signal prediction deviation value after the load reduction function transformation processing; The fourth multiplier (30) is used to calculate the product of the load signal prediction deviation value after the load reduction function transformation processing and the load reduction load signal comparison deviation value to obtain the load reduction load signal deviation interaction influence value.

5. The control system of a coal-fired power plant according to claim 4, characterized in that: The load-increasing steam pressure correction module comprises: a second function converter (10), a third subtractor (13), a third function converter (14) and a third multiplier (15); The load reduction steam pressure correction module comprises: a fifth function converter (31), a sixth subtractor (32), a sixth function converter (33) and a sixth multiplier (34); The input end of the second function converter (10) is connected to the third output end of the load instruction primary frequency modulation collector (1), the output end of the second function converter (10) is connected to the first input end of the third multiplier (15), the first input end of the third subtractor (13) is connected to the first output end of the front pressure collector (11), the second input end of the third subtractor (13) is connected to the first output end of the front target pressure collector (12), the output end of the third subtractor (13) is connected to the input end of the third function converter (14), the output end of the third function converter (14) is connected to the second input end of the third multiplier (15), and the output end of the third multiplier (15) is connected to the second input end of the load increase comprehensive correction control module; The input end of the fifth function converter (31) is connected to the fourth output end of the load instruction primary frequency modulation collector (1), the output end of the fifth function converter (31) is connected to the first input end of the sixth multiplier (34), the first input end of the sixth subtractor (32) is connected to the second output end of the front machine pressure collector (11), the second input end of the sixth subtractor (32) is connected to the second output end of the front machine target pressure collector (12), the output end of the sixth subtractor (32) is connected to the input end of the sixth function converter (33), the output end of the sixth function converter (33) is connected to the second input end of the sixth multiplier (34), and the output end of the sixth multiplier (34) is connected to the second input end of the load reduction comprehensive correction control module; The second function converter (10) is used to perform load-raising function conversion processing on the load signal of the power grid system to obtain the load signal of the power grid system after the load-raising function conversion processing; The third subtractor (13) is used to calculate the difference between the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit to obtain a steam signal prediction deviation value; The third function converter (14) is used to perform load-raising function conversion processing on the steam signal prediction deviation value to obtain the steam signal prediction deviation value after the load-raising function conversion processing; The third multiplier (15) is used to calculate the product of the predicted deviation value of the steam signal after the load-raising function conversion processing and the load signal of the power grid system after the load-raising function conversion processing, so as to obtain the load-raising load signal deviation influence factor; The fifth function converter (31) is used to perform load reduction function conversion processing on the power grid system load signal to obtain the power grid system load signal after the load reduction function conversion processing; The sixth subtractor (32) is used to calculate the difference between the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit to obtain a steam signal prediction deviation value. The sixth function converter (33) is used to perform load reduction function conversion processing on the steam signal prediction deviation value to obtain the steam signal prediction deviation value after the load reduction function conversion processing; The sixth multiplier (34) is used to calculate the product of the predicted deviation value of the steam signal after the load reduction function conversion processing and the load signal of the power grid system after the load reduction function conversion processing, so as to obtain the load reduction load signal deviation influence factor.

6. The control system of a coal-fired power plant according to claim 5, characterized in that: The load-raising integrated correction control module comprises: a second multiplier (16), a first CCS mode setting module (17), a first time-delay disconnector (18), a first analog quantity switcher (19), a first constant setter (20), a second analog quantity switcher (21), a load-raising state instruction acquisition module (22) and a second constant setter (23); The load reduction comprehensive correction control module comprises: a fifth multiplier (35), a second CCS mode setting module (36), a second time delay disconnector (37), a third simulator switcher (38), a third constant setter (39), a fourth simulation switcher (40), a load reduction state instruction acquisition module (41) and a fourth constant setter (42); The first input end of the second multiplier (16) is connected to the output end of the first multiplier (9), the second input end of the second multiplier (16) is connected to the output end of the third multiplier (15), the output end of the second multiplier (16) is connected to the first input end of the first analog switch (19), the output end of the first CCS mode setting module (17) is connected to the input end of the first delay disconnector (18), the output end of the first delay disconnector (18) is connected to the second input end of the first analog switch (19), and the first constant setting module (17) is connected to the first input end of the first analog switch (19). The output end of the load-raising state instruction acquisition module (22) is connected to the second input end of the second analog quantity switch (21); the output end of the second constant setting device (23) is connected to the third input end of the second analog quantity switch (21); and the output end of the second analog quantity switch (21) is connected to the first input end of the control module; The first input end of the fifth multiplier (35) is connected to the output end of the fourth multiplier (30), the second input end of the fifth multiplier (35) is connected to the output end of the sixth multiplier (34), the output end of the fifth multiplier (35) is connected to the first input end of the third simulator switch (38), the output end of the second CCS mode setting module (36) is connected to the input end of the second delay disconnector (37), the output end of the second delay disconnector (37) is connected to the second input end of the third simulator switch (38), the output end of the third constant setter (39) is connected to the third input end of the third simulator switch (38), the output end of the third simulator switch (38) is connected to the first input end of the fourth simulation switch (40), the output end of the load reduction state instruction acquisition module (41) is connected to the second input end of the fourth simulation switch (40), the output end of the fourth constant setter (42) is connected to the third input end of the fourth simulation switch (40), and the output end of the fourth simulation switch (40) is connected to the second input end of the control module; The second multiplier (16) is used to calculate the product of the load signal deviation interaction impact value of the load increase and the load signal deviation impact factor of the load increase to obtain the load signal deviation impact value of the load increase; The first CCS mode setting module (17) is used to collect the CCS mode command signal of the load-increasing coal-fired thermal power unit; The first constant setter (20) is used to set a first preset load signal deviation influence value of the load rise; The load increase state instruction acquisition module (22) is used to acquire the load increase instruction adjustment signal of the power grid system; The second constant setter (23) is used to set a second preset load signal deviation influence value; The first time-delay disconnector (18) is used to control the on-off transmission of the CCS mode command signal of the load-increasing coal-fired power unit to the first analog switch (19); The first analog switch (19) is used to select the load-raising load signal deviation impact value when a CCS mode command signal of a load-raising coal-fired power unit is monitored, and the second analog switch (21) is used to send the load-raising load signal deviation impact value to the control module when a load-raising command adjustment signal of a power grid system is monitored; or The first analog switch (19) is used to select a first preset load-raising load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired power generation unit is not detected, and the second analog switch (21) is used to send the first preset load-raising load signal deviation impact value to the control module when the load-raising command adjustment signal of the power grid system is detected; or The first analog switch (19) is used to select the load-raising load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is monitored, and the second analog switch (21) is used to select the second preset load-raising load signal deviation impact value when the CCS mode command signal of the load-raising coal-fired thermal power unit is not monitored; The fifth multiplier (35) is used to calculate the product of the load reduction load signal deviation interaction impact value and the load reduction load signal deviation impact factor to obtain the load reduction load signal deviation impact value; The second CCS mode setting module (36) is used to collect the CCS mode command signal of the load reduction coal-fired thermal power unit; The third constant setter (39) is used to set a first preset load reduction load signal deviation influence value; The load reduction state instruction acquisition module (41) is used to collect the load reduction instruction adjustment signal of the power grid system; The fourth constant setter (42) is used to set a second preset load reduction load signal deviation influence value; The second time-delay disconnector (37) is used to control the on / off transmission of the CCS mode command signal of the load-reducing coal-fired power unit to the third analog switch (38); The third analog switch (38) is used to select the load signal deviation impact value of the load reduction when the CCS mode command signal of the load reduction coal-fired power unit is monitored, and the fourth analog switch (40) is used to send the load signal deviation impact value of the load reduction to the control module when the load reduction command adjustment signal of the power grid system is monitored; or The third analog switch (38) is used to select the first preset load reduction load signal deviation impact value when the CCS mode command signal of the load reduction coal-fired power unit is not detected, and the fourth analog switch (40) is used to send the first preset load reduction load signal deviation impact value to the control module when the power grid system load reduction command adjustment signal is detected; or The third analog switch (38) is used to select the load reduction signal deviation impact value when the CCS mode command signal of the load reduction coal-fired power unit is monitored, and the fourth analog switch (40) is used to select the second preset load reduction signal deviation impact value when the power grid system load reduction command adjustment signal is not monitored, and send the second preset load reduction signal deviation impact value to the control module.

7. The control system of a coal-fired power plant according to claim 6, characterized in that: The control module includes: a seventh multiplier (43) and a fuel acceleration command signal device (44); A first input end of the seventh multiplier (43) is connected to an output end of the second analog quantity switch (21), a second input end of the seventh multiplier (43) is connected to an output end of the fourth analog quantity switch (40), and an output end of the seventh multiplier (43) is connected to an input end of a fuel acceleration instruction signal device (44); The seventh multiplier (43) is used to calculate the product of the load signal deviation influence value of the load increase or the load signal deviation influence value of the load decrease and a preset correction coefficient to obtain a corrected load signal deviation influence value of the load increase or the corrected load signal deviation influence value of the load decrease; The fuel acceleration command signal device (44) is used to generate a load-up fuel supply amount signal of the fuel control system or a load-down fuel supply amount signal of the fuel control system based on the corrected load-up load signal deviation influence value or the corrected load-down load signal deviation influence value.

8. A method for controlling a coal-fired thermal power unit, implemented based on the control system of the coal-fired thermal power unit according to any one of claims 1 to 7, characterized in that: include: Collecting power grid system load signals, power grid system target load signals, coal-fired thermal power unit steam pressure signals and coal-fired thermal power unit target steam pressure signals; Determining a load-raising load signal deviation interactive impact value and a load-dropping load signal deviation interactive impact value based on a power grid system load signal and a power grid system target load signal; Based on the load signal of the power grid system, the steam pressure signal of the coal-fired thermal power unit and the target steam pressure signal of the coal-fired thermal power unit, a load signal deviation influencing factor for load increase and a load signal deviation influencing factor for load decrease are determined; Calculate the product of the load signal deviation interaction impact value of the load increase and the load signal deviation impact factor of the load increase to obtain the load signal deviation impact value of the load increase, and calculate the product of the load signal deviation interaction impact value of the load decrease and the load signal deviation impact factor of the load decrease to determine the load signal deviation impact value of the load decrease; When receiving the CCS mode command signal of the load-raising coal-fired power unit and the load-raising command adjustment signal of the power grid system, the product of the load-raising load signal deviation influence value and the preset correction coefficient is calculated to obtain the corrected load-raising load signal deviation influence value, and based on the corrected load-raising load signal deviation influence value, the load-raising fuel supply amount signal of the fuel control system is generated; or When the CCS mode command signal of the load reduction coal-fired power unit and the load reduction command adjustment signal of the power grid system are received, the product of the load reduction load signal deviation impact value and the preset correction coefficient is calculated to obtain the corrected load reduction load signal deviation impact value, and based on the corrected load reduction load signal deviation impact value, the load reduction fuel supply signal of the fuel control system is generated.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the machine-readable instructions are executed by the processor, the method for controlling a coal-fired power plant unit according to claim 8 is executed.

10. A computer-readable storage medium storing computer instructions, characterized in that: When the computer instructions are executed on a computer, the computer executes the method for controlling a coal-fired power plant according to claim 8.

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