Coal feeder metering correction method and system, electronic equipment and storage medium

Abstract

The invention provides a coal feeder metering correction method and system, electronic equipment and a storage medium, and the method comprises the steps: judging whether a first coal feeder and a second coal feeder exist in all coal feeders or not according to the actual coal feeding amount, the coal feeder rotating speed and the standard load of each coal feeder in a unit set of a coordination control system; if yes, the actual coal feeding amount of each first coal feeder is corrected through the standard load and the actual unit length load weight of each first coal feeder, and the corresponding actual coal feeding amount is obtained; the standard load and the actual unit length load of each first coal feeder are used for correcting the fuel main control instruction of the first coal feeder to obtain a corresponding control instruction; determining a control instruction of each second coal feeder according to the total coal quantity indicated by the total coal quantity instruction and the real coal feeding quantity of each first coal feeder; and corresponding control instructions are sent to each first coal feeder and each second coal feeder.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and more specifically to a coal feeder metering correction method, system, electronic equipment and storage medium. Background Art

[0002] Coal feeders are the main coal feeding equipment for circulating fluidized bed boilers and pulverized coal boilers in coal-fired power plants. Coal feeders can achieve continuous and uniform coal feeding. Specifically, they can accurately weigh and measure the coal during the feeding process through a weighing system, and automatically adjust the coal feeding amount according to the needs of the boiler combustion control system, so that the actual coal feeding amount matches the boiler load.

[0003] In order to ensure the stability of the load, pressure and other parameters of the coal-fired power plant, it is necessary to provide a certain amount of coal for the coal-fired power plant to burn and generate electricity. In the prior art, the coal feeder delivers the corresponding coal to the coal mill for the boiler to burn and generate electricity according to the total coal quantity instruction issued by the coordinated control system. However, the parameters in the coordinated control system are set according to the coal quantity of the debugger of the coal-fired power plant. When different loads or load adjustments are required, the amount of coal supplied by the coal feeder and the coal mill needs to be adjusted. This adjustment needs to be based on the accurate and reliable weighing and metering of the coal feeder. Once the weighing and metering of the coal feeder is abnormal (too large or too small), the actual total amount of coal actually supplied by each coal feeder will deviate from the amount of coal indicated by the total coal quantity instruction issued by the coordinated controller, resulting in the final output of coal unable to correctly respond to the total coal quantity instruction of the coordinated control system, thereby causing an abnormality in the coordinated control system. Summary of the invention

[0004] In view of this, the present invention provides a coal feeder metering correction method, system, electronic device and storage medium to solve the problem in the prior art that when the weighing and metering of the coal feeder is abnormal, the final amount of coal output by each coal feeder cannot correctly respond to the total coal quantity instruction of the coordinated control system, thereby causing an abnormality in the coordinated control system.

[0005] In a first aspect, the present application provides a coal feeder metering correction method, which is applied to a coordinated control system, and the method comprises:

[0006] Acquire the actual coal feeding amount, coal feeder speed and standard load of each coal feeder in the unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined according to the total coal amount instruction;

[0007] According to the actual coal feeding amount, the rotation speed and the standard load of each of the coal feeders, it is judged whether there is a first coal feeder and a second coal feeder among the coal feeders; wherein the first coal feeder is a coal feeder with abnormal weighing, and the second coal feeder is a coal feeder with normal weighing;

[0008] If there is a first coal feeder and a second coal feeder among the coal feeders, the actual coal feeding amount of the first coal feeder is corrected by using the standard load and the actual load weight per unit length of each of the first coal feeders to obtain the real coal feeding amount of each of the first coal feeders;

[0009] Correcting the fuel master control instruction of each of the first coal feeders by using the standard load and the actual unit length load of each of the first coal feeders to obtain the control instruction of each of the first coal feeders;

[0010] determining a control instruction for each of the second coal feeders according to the total coal quantity indicated by the total coal quantity instruction and the actual coal supply quantity of each of the first coal feeders;

[0011] Corresponding control instructions are sent to each of the first coal feeders and each of the second coal feeders, so that the total amount of coal supplied by each of the first coal feeders and each of the second coal feeders based on the corresponding control instructions is equal to the total amount of coal indicated by the total coal amount instruction.

[0012] Optionally, judging whether there is a first coal feeder and a second coal feeder among the coal feeders according to an actual coal feeding amount, a rotation speed of the coal feeder and a standard load of each of the coal feeders includes:

[0013] Determining the load weight per unit length of each coal feeder according to the actual coal feeding amount and the rotation speed of each coal feeder;

[0014] Determining the metering error of each of the coal feeders according to the load weight per unit length and the standard load of each of the coal feeders;

[0015] According to the metering errors of the coal feeders and the operating status of the pulverizing system corresponding to the coal feeders, it is determined whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders;

[0016] If there is a coal feeder with abnormal weighing and there is a coal feeder with normal weighing among the coal feeders, it is determined that there is a first coal feeder and a second coal feeder among the coal feeders.

[0017] Optionally, determining the metering error of each coal feeder according to the load weight per unit length and the standard load of each coal feeder includes:

[0018] For each of the coal feeders, the quotient of the actual coal feeding amount of the coal feeder and the rotation speed of the coal feeder is calculated to obtain the load weight per unit length of the coal feeder.

[0019] Optionally, determining the metering error of each coal feeder according to the load weight per unit length and the standard load of each coal feeder includes:

[0020] For each of the coal feeders, calculating the difference between the load weight per unit length of the coal feeder and the standard load;

[0021] The quotient of the difference and the standard load is calculated, and the absolute value of the quotient of the difference and the standard load is taken to obtain the metering error of the coal feeder.

[0022] Optionally, judging whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders according to the metering errors of the coal feeders and the operating status of the pulverizing system corresponding to the coal feeders includes:

[0023] For each of the coal feeders, determining whether a metering error of the coal feeder is greater than a preset deviation, and whether an operating state of a pulverizing system corresponding to the coal feeder is in operation;

[0024] If the metering error of the coal feeder is greater than the preset deviation, and the operation state of the pulverizing system corresponding to the coal feeder is running, it is determined that the weighing metering of the coal feeder is abnormal;

[0025] If the metering error of the coal feeder is not greater than the preset deviation, or the operating state of the pulverizing system corresponding to the coal feeder is not running, it is determined that the weighing and metering of the coal feeder is normal;

[0026] If there is a coal feeder with abnormal weighing and there is a coal feeder with normal weighing among the coal feeders, it is determined that there is a first coal feeder and a second coal feeder among the coal feeders.

[0027] Optionally, if there is a first coal feeder and a second coal feeder among the coal feeders, the actual coal feeding amount of the first coal feeder is corrected by using the standard load and the actual load weight per unit length of each of the first coal feeders to obtain the real coal feeding amount of each of the first coal feeders, including:

[0028] If there is a first coal feeder and a second coal feeder among the coal feeders, calculating the product of the actual coal feeding amount and the standard load of each of the first coal feeders;

[0029] The actual coal supply amount of each of the first coal feeders is obtained by calculating the product of the actual coal supply amount and the standard load of each of the first coal feeders and the quotient of the actual load weight per unit length.

[0030] Optionally, the using the standard load and the actual unit length load of each of the first coal feeders to correct the fuel master control instruction of the first coal feeder to obtain the control instruction of each of the first coal feeders includes:

[0031] For each of the first coal feeders, multiply the amount of coal indicated by the fuel master control instruction of the first coal feeder by the actual load weight per unit length;

[0032] The coal feeding amount control instruction of the first coal feeder is obtained by multiplying the coal amount indicated by the fuel master control instruction of the first coal feeder by the actual load weight per unit length and dividing the product by the standard load of the first coal feeder.

[0033] A second aspect of the present application provides a coal feeder metering correction system, which is applied to a coordinated control system. The coal feeder metering correction system includes:

[0034] an acquisition unit, used for acquiring the actual coal feeding amount, the coal feeder speed and the standard load of each coal feeder in the unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined by the boiler master control and the fuel master control according to the total coal amount instruction;

[0035] a judgment unit, configured to judge whether there is a first coal feeder and a second coal feeder among the coal feeders according to an actual coal feeding amount, a rotation speed of the coal feeder and a standard load of each of the coal feeders; wherein the first coal feeder is a coal feeder with abnormal weighing, and the second coal feeder is a coal feeder with normal weighing;

[0036] a first correction unit, configured to correct the actual coal feeding amount of each of the first coal feeders by using the standard load and the actual load weight per unit length of each of the first coal feeders, if there is a first coal feeder and a second coal feeder among the coal feeders, so as to obtain the real coal feeding amount of each of the first coal feeders;

[0037] a second correction unit, configured to correct the fuel master control instruction of each of the first coal feeders by using the standard load and the actual unit length load of each of the first coal feeders to obtain a control instruction of each of the first coal feeders;

[0038] an instruction generating unit, configured to determine a control instruction for each of the second coal feeders according to the total coal quantity indicated by the total coal quantity instruction and the actual coal supply quantity of each of the first coal feeders;

[0039] An instruction sending unit is used to send corresponding control instructions to each of the first coal feeders and each of the second coal feeders, so that the total amount of coal supplied by each of the first coal feeders and each of the second coal feeders based on the corresponding control instructions is equal to the total amount of coal indicated by the total coal amount instruction.

[0040] The third aspect of the present application provides an electronic device, comprising: a processor and a memory, wherein the processor and the memory are connected via a communication bus; wherein the processor is used to call and execute a program stored in the memory; and the memory is used to store a program, wherein the program is used to implement the coal feeder metering correction method provided in the first aspect of the present application.

[0041] The fourth aspect of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. The computer-executable instructions are used to execute the coal feeder metering correction method provided in the first aspect of the present application.

[0042] The present invention provides a coal feeder metering correction method, system, electronic device and storage medium, which are applied to a coordinated control system to obtain the actual coal feeding amount, coal feeder speed and standard load of each coal feeder in a unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined according to the total coal amount instruction; if it is determined that there is both a first coal feeder with abnormal weighing and a second coal feeder with normal weighing in each coal feeder according to the actual coal feeding amount, coal feeder speed and standard load of each coal feeder, at this time, if the weighing metering of the coal feeder with abnormal weighing is not corrected, it will cause a deviation between the total coal amount actually supplied by each coal feeder and the actual fed back coal amount supplied, and this deviation will affect the regulating performance of the coordinated control system, causing disturbance, and ultimately leading to poor automatic control performance of the coordinated control system, resulting in increased energy consumption of the unit unit; therefore, in the case of determining that there is a first coal feeder with abnormal weighing in each coal feeder, the present application uses the standard load and the actual unit length load weight of each first coal feeder to correct the actual coal amount fed back by the first coal feeder. The actual coal supply is corrected to obtain the actual coal supply of each first coal feeder, and the fuel main control instruction of the first coal feeder is corrected by using the standard load and the actual unit length load of each first coal feeder to obtain the control instruction of each first coal feeder, so that the coal supply amount of each first coal feeder based on the corresponding control instruction can be equal to the corresponding actual coal supply amount, avoiding the inconsistency between the actual supplied coal amount and the fed-back coal amount due to weighing abnormality; at the same time, the control instruction of each second coal feeder can be readjusted according to the total coal amount indicated by the total coal amount instruction and the actual coal supply amount of each first coal feeder, and the corresponding control instruction is sent to each first coal feeder and each second coal feeder, so that the total coal amount supplied by each first coal feeder and each second coal feeder based on the corresponding control instruction is equal to the total coal amount indicated by the total coal amount instruction, thereby solving the problem in the prior art that the total coal amount actually supplied by each coal feeder is different from the total coal amount actually fed-back supplied due to weighing abnormality of some coal feeders, affecting the adjustment performance of the coordinated control system, causing disturbance, and ultimately leading to poor automatic control performance of the coordinated control system and increased energy consumption of the unit unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0044] Figure 1 A schematic flow chart of a coal feeder metering correction method provided in an embodiment of the present application;

[0045] Figure 2 An example diagram of sending a fuel master control instruction to each coal feeder through a boiler master control and a fuel master control provided in an embodiment of the present application;

[0046] Figure 3 An example diagram of each coal feeder feeding back corresponding actual coal feeding amount to the fuel master control based on corresponding fuel master control instructions provided in an embodiment of the present application;

[0047] Figure 4 An example diagram for determining whether a coal feeder has weighing anomalies provided in an embodiment of the present application;

[0048] Figure 5 An example diagram of judging whether there is an abnormal weighing and metering of a coal feeder in a coordinated control system provided in an embodiment of the present application;

[0049] Figure 6 An example diagram for correcting the actual coal feeding amount of a first coal feeder provided in an embodiment of the present application;

[0050] Figure 7 An example diagram of correcting a fuel master control instruction of a first coal feeder provided in an embodiment of the present application;

[0051] Figure 8 A schematic structural diagram of a coal feeder metering correction system provided by an embodiment of the present invention;

[0052] Fig. 9 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article 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, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0055] It can be seen from the above background technology that in the prior art, the coal feeder delivers corresponding coal to the coal mill for combustion in the boiler to generate electricity according to the coal quantity instruction issued by the coordinated control system.

[0056] In actual application, when the unit of the coordinated control system is running, the boiler and the steam turbine generator not only need to jointly maintain the external load, but also need to ensure the stability of the internal operating parameters (mainly the main steam pressure). Therefore, whether the output power of the unit is consistent with the load requirements reflects the balance relationship between the energy supply and demand between the unit and the external power grid; while the main steam pressure reflects the balance relationship between the energy supply and demand between the boiler and the steam turbine generator inside the unit. In other words, power and main steam pressure are the main parameters for coordinated control of the unit.

[0057] However, due to their respective characteristics during operation, the dynamic characteristics of boilers and steam turbine generators are very different. Specifically, the load response of steam turbine generators is fast, while the load response of boilers is slow. Therefore, when the unit is performing load control, it is necessary to coordinate the control operations on both sides of the machine and the boiler well, and reasonably maintain the supply and demand balance of the two internal and external energies to take into account the load response performance and the stability of internal operating parameters. In other words, in order to make the unit have a faster power response and a certain frequency regulation capability to the outside, it is necessary to ensure that the main steam pressure is maintained within the allowable range internally.

[0058] It should be noted that the boiler master control is an important component of the coordinated control system. Its input signals are the main steam pressure set value and feedback value. The coal quantity instruction is obtained through PID calculation based on parameters such as power-coal ratio, steam set value deviation, and load change feedforward. The coal quantity instruction is transmitted to the coal feeder through the combustion master control to control the amount of coal supplied by each coal feeder, thereby forming a process closed loop that provides the corresponding amount of coal according to the control requirements.

[0059] However, once the weighing measurement of the coal feeder is abnormal (too large or too small), the coal quantity indicated by the coal combustion instruction issued by the coordination controller will deviate from the actual required coal quantity, resulting in the final output coal quantity being unable to remain consistent with the coal quantity indicated by the coal quantity instruction of the coordination control system, thereby causing an abnormality in the coordination control system.

[0060] At present, the main reasons for abnormal weighing and metering of coal feeders are: sensor damage, inaccurate calibration, loose mechanical structure, sediment and blockage, electrical failure and environmental factors (high temperature, dust, etc.); when the above problems occur, the weighing system of the coal feeder will fail, resulting in inaccurate weighing and metering. Specifically, the coal quantity indicated by the coal quantity instruction issued by the boiler master control is equal to the coal quantity fed back by the meter, but the actual amount of coal supplied by the coal feeder deviates from the coal quantity indicated by the coal quantity instruction, resulting in metering errors, affecting the work of the boiler master control, further increasing the delay change time of the coordination system, and increasing the adjustment time, which is not conducive to the safe, stable and reliable operation of the generation system of coal-fired generator enterprises.

[0061] However, the anomaly of the weighing system of the coal feeder occurs slowly and is not easy to be detected. Therefore, how to detect the anomaly of the weighing system in time, avoid the anomaly of the weighing measurement of the coal feeder, and ensure the safe, stable and reliable operation of the generation system of the coal-fired power generator enterprise is a problem that urgently needs to be solved in this application.

[0062] Therefore, the present application provides a coal feeder metering correction method, system, electronic device and storage medium. When it is determined that there is both a first coal feeder with weighing abnormality and a second coal feeder with normal weighing among the coal feeders, the actual coal feeding amount fed back by the first coal feeder is corrected by using the standard load and the actual unit length load weight of each first coal feeder to obtain the real coal feeding amount of each first coal feeder, and the fuel main control instruction of the first coal feeder is corrected by using the standard load and the actual unit length load of each first coal feeder to obtain the control instruction of each first coal feeder, so that the coal feeding amount supplied by each first coal feeder based on the corresponding control instruction can be equal to the corresponding real coal feeding amount, thereby avoiding the real coal feeding amount caused by weighing abnormality. The situation that the supplied coal amount and the fedback coal amount are inconsistent; at the same time, the control instruction of each second coal feeder can be readjusted according to the total coal amount indicated by the total coal amount instruction and the actual coal supply amount of each first coal feeder, and the corresponding control instruction is sent to each first coal feeder and each second coal feeder, so that the total coal amount supplied by each first coal feeder and each second coal feeder based on the corresponding control instruction is equal to the total coal amount indicated by the total coal amount instruction, thereby solving the problem in the prior art that due to weighing abnormalities in some coal feeders, there is a deviation between the total coal amount actually supplied by each coal feeder and the total coal amount actually fed back, which affects the adjustment performance of the coordinated control system and causes disturbances, which ultimately leads to poor automatic control performance of the coordinated control system and increased energy consumption of the unit.

[0063] See also Figure 1 , shows a flow chart of a coal feeder metering correction method provided by an embodiment of the present application, which is applied to a coordinated control system. The method specifically includes the following steps:

[0064] S101: Obtain the actual coal feeding amount, coal feeder speed and standard load of each coal feeder in the unit group of the coordinated control system; wherein, the actual coal feeding amount of the coal feeder is the feedback of the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined by the boiler master control and the fuel master control according to the total coal quantity instruction.

[0065] In an embodiment of the present application, the coordinated control system can actively send a corresponding total coal quantity instruction to the fuel through the boiler master control, wherein the total coal quantity instruction indicates the total coal quantity that each coal feeder needs to supply; after the fuel master control receives the total coal quantity instruction, it determines the coal quantity that each coal feeder needs to supply according to the total coal quantity indicated by the total coal quantity instruction, and generates a corresponding fuel master control instruction according to the coal quantity of each coal feeder, so as to send the fuel master control instruction of each coal feeder to the corresponding coal feeder, so that each coal feeder can feedback the corresponding actual coal quantity to the fuel master control based on the received fuel master control instruction. Among them, the total coal quantity indicated by the total coal quantity instruction can be divided equally according to the number of coal feeders to obtain the coal quantity that each coal feeder needs to supply.

[0066] It should be noted that the coal quantity indicated by the fuel master control instruction is equal to the actual coal supply quantity of the coal feeder based on the feedback of the fuel master control execution.

[0067] It should also be noted that, when there is no abnormality in the weighing system of the coal feeder, the actual coal feeding amount that the coal feeder feeds back to the fuel master control based on the received fuel master control instruction should be equal to the actual amount of coal supplied by the coal feeder, that is, the sum of the actual amount of coal supplied by each coal feeder based on the received fuel master control instruction should be equal to the total amount of coal indicated by the total coal quantity instruction; when there is an abnormality in the weighing system of the coal feeder, the actual coal feeding amount that the coal feeder feeds back to the fuel master control based on the received fuel master control instruction is not equal to the actual amount of coal supplied by the coal feeder, that is, the actual amount of coal supplied by the coal feeder may be heavier or lighter, but the system can only understand the coal feeder. The actual coal feeding amount fed back cannot directly reveal the real coal feeding amount of the coal feeder. Therefore, the actual coal feeding amount fed back by the coal feeder can be used to judge whether there is any abnormality in the weighing system of the coal feeder. In the case of an abnormality in the weighing system of the coal feeder, the actual coal feeding amount of the coal feeder and the fuel main control execution of the coal feeder should be corrected in time. This can effectively solve the problem that the total amount of coal actually supplied by each coal feeder and the total amount of coal actually fed back supply deviate due to weighing abnormalities in some coal feeders, affecting the adjustment performance of the coordinated control system, causing disturbances, and ultimately leading to poor automatic control performance of the coordinated control system and increased energy consumption of the unit.

[0068] For example, the unit unit of the coordinated control system includes 5 coal feeders, namely, coal feeder A, coal feeder B, coal feeder C, coal feeder D and coal feeder E; the coordinated control system can actively send the corresponding total coal quantity instruction to the fuel through the boiler master control, so that the fuel master control determines the coal supply quantity required to be supplied by each coal feeder according to the total coal quantity indicated by the received total coal quantity instruction, and generates the corresponding fuel master control instruction according to the coal supply quantity of each coal feeder, so as to send the corresponding fuel master control instruction to each coal feeder, such as Figure 2 As shown; after receiving the corresponding fuel master control instruction, each coal feeder feeds back the corresponding actual coal feeding amount to the fuel master control based on the received fuel master control instruction, such as Figure 3 shown.

[0069] During the specific execution of step S101, the coordinated control system can obtain from the fuel master control the actual coal feeding amount of each coal feeder of each unit based on the corresponding fuel master control instruction feedback, and can also obtain the rotation speed and standard load of each coal feeder.

[0070] It should be noted that the standard load of each coal feeder is consistent, where the standard load is the "standard weight of coal on each meter of the belt", for example, the current standard weight of coal on each meter of the belt is 75 kilograms.

[0071] It should also be noted that the standard load is taken from the data of the coal feeder weighing instrument. Specifically, when the metering of the coal feeder is normal, the coal feeder is stopped and the standard load under the condition of accurate (normal) metering of the coal feeder can be read by entering the coal feeder weighing instrument.

[0072] S102: Determine whether there is a first coal feeder and a second coal feeder among the coal feeders according to the actual coal feeding amount, the rotation speed and the standard load of each coal feeder; if there is a first coal feeder and a second coal feeder among the coal feeders, execute step S103.

[0073] In the specific execution of step S102, after obtaining the actual coal feeding amount, coal feeder speed and standard load of each coal feeder in the unit unit, the coordinated control system can determine the metering error of each coal feeder according to the actual coal feeding amount, coal feeder speed and standard load of each coal feeder, and judge whether there is a first coal feeder and a second coal feeder in each coal feeder according to the metering error of each coal feeder and the operating state of the pulverizing system corresponding to each coal feeder. If there is a first coal feeder and a second coal feeder in each coal feeder, execute step S103; if there is no first coal feeder with abnormal weighing in each coal feeder, return to execute step S101; if there is no second coal feeder with normal weighing in each coal feeder, it means that each coal feeder in the unit unit has abnormal weighing. At this time, it can be considered that the coordinated control system can no longer realize automatic control. The coordinated control system can exit automatic control and output corresponding prompt information to prompt the corresponding technicians to perform corresponding manual operations. Among them, the first coal feeder is a coal feeder with abnormal weighing, and the second coal feeder is a coal feeder with normal weighing.

[0074] Optionally, the process of judging whether there are the first coal feeder and the second coal feeder among the coal feeders based on the actual coal feeding amount, coal feeder speed and standard load of each coal feeder can be specifically as follows: determining the load weight per unit length of each coal feeder according to the actual coal feeding amount and coal feeder speed of each coal feeder; determining the metering error of each coal feeder according to the load weight per unit length and the standard load of each coal feeder; judging whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders according to the metering error of each coal feeder and the operating status of the pulverizing system corresponding to the coal feeder; if there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders, determining whether there are the first coal feeder and the second coal feeder among the coal feeders.

[0075] As a preferred method of an embodiment of the present application, for each coal feeder, the load weight per unit length of the coal feeder can be obtained by calculating the quotient of the actual coal feeding amount of the coal feeder and the rotation speed of the coal feeder; the difference between the load weight per unit length of the coal feeder and the standard load is calculated; the quotient of the difference and the standard load is calculated, and the absolute value of the quotient of the difference and the standard load is taken to obtain the metering error of the coal feeder.

[0076] It should be noted that the actual coal feeding amount of the coal feeder is in tons / hour, and the unit of the coal feeder rotation speed is in meters / second. Therefore, after dividing the actual coal feeding amount of the coal feeder by the rotation speed of the coal feeder, the weight of the coal per unit length can be obtained, that is, the load weight per unit length of the coal feeder, in kilograms / meter.

[0077] It is worth mentioning that the main reasons for the abnormal weighing and metering of the coal feeder are: sensor damage, inaccurate calibration, loose mechanical structure, sediment and blockage, electrical failure and environmental factors (high temperature, dust, etc.), etc., and the unit length load weight of the coal feeder will also be affected by sensor damage, inaccurate calibration, loose mechanical structure, sediment and blockage, electrical failure and environmental factors (high temperature, dust, etc.) and change (the unit length load weight of the coal feeder becomes larger or smaller). Therefore, it is possible to determine that the weighing system of the coal feeder has an abnormality based on the metering error of the coal feeder; specifically, the main feature of the coal feeder metering error of the coal feeder is whether the unit length load weight of the coal feeder has changed. Therefore, the abnormal situation of the weighing system of each coal feeder (abnormal weighing and metering of the coal feeder) can be determined by the coal feeder metering error determined by the unit length load weight of each coal feeder and the corresponding operating status of the pulverizing system.

[0078] It should also be noted that the preset deviation can be set in advance according to the corresponding standards. According to the standards, the allowable deviation range of the metering error of the coal feeder is 0 to the preset deviation, and the operating status of the pulverizing system corresponding to the coal feeder is running. That is to say, if the metering error of the coal feeder is greater than the preset deviation, it can be considered that the load weight per unit length of the coal feeder has changed. At this time, if the operating status of the pulverizing system corresponding to the coal feeder is running, it can be determined that the weighing system of the coal feeder is abnormal, that is, it can be confirmed that the coal feeder has an abnormal weighing and metering problem.

[0079] Optionally, the process of judging whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders based on the metering errors of each coal feeder and the operating status of the pulverizing system corresponding to the coal feeder can be specifically as follows: for each coal feeder, judging whether the metering error of the coal feeder is greater than a preset deviation, and whether the operating status of the pulverizing system corresponding to the coal feeder is running; if the metering error of the coal feeder is greater than the preset deviation, and the operating status of the pulverizing system corresponding to the coal feeder is running, determining that the weighing and metering of the coal feeder is abnormal; if the metering error of the coal feeder is not greater than the preset deviation or the operating status of the pulverizing system corresponding to the coal feeder is not running, determining that the weighing and metering of the coal feeder is normal; if there are coal feeders with abnormal weighing and coal feeders with normal weighing and metering among the coal feeders, determining whether there are a first coal feeder and a second coal feeder among the coal feeders.

[0080] It should be noted that the preset deviation can be 0.5%, which can be set according to actual applications, and is not limited in this embodiment of the present application. For example, if the preset deviation is 0.5%, if the metering error of the coal feeder is greater than 0.5%, and the operating state of the pulverizing system corresponding to the coal feeder is running, it can be determined that the weighing system of the coal feeder is abnormal, that is, the weighing and metering of the coal feeder is abnormal.

[0081] For example, the preset deviation is 0.5%, and the unit unit of the coordinated control system includes 5 coal feeders, namely coal feeder A, coal feeder B, coal feeder C, coal feeder D and coal feeder E; for each coal feeder, the actual coal feeding amount of the coal feeder can be divided by the rotation speed of the coal feeder to obtain the unit length load weight of the coal feeder; the unit length load weight of the coal feeder is subtracted from the standard load; the difference obtained by subtracting the unit length load weight of the coal feeder from the standard load is divided by the standard load, and the absolute value of the quotient of the difference and the standard load is taken to obtain the metering error of the coal feeder; it is determined whether the metering error of the coal feeder is greater than 0.5%, and whether the operating status of the pulverizing system of the coal feeder is running; if the metering error of the coal feeder is greater than 0.5% and the corresponding operating status of the pulverizing system is running, it is determined that the weighing of the coal feeder is abnormal, that is, the weighing and metering of the coal feeder is abnormal, such as Figure 4 As shown; if the weighing of coal feeder A is abnormal, or the weighing of coal feeder B is abnormal, or the weighing of coal feeder C is abnormal, or the weighing of coal feeder D is abnormal, or the weighing of coal feeder E is abnormal, it can be determined that the coordinated control system currently has an abnormal weighing measurement of the coal feeder, such as Figure 5 As shown, it is possible to determine among the coal feeders the coal feeders with abnormal weighing and the coal feeders with normal weighing.

[0082] S103: Correct the actual coal feeding amount of the first coal feeder using the standard load and the actual load weight per unit length of each first coal feeder to obtain the real coal feeding amount of each first coal feeder.

[0083] In the specific execution process of step S103, the coordinated control system, when determining that there is a first coal feeder and a second coal feeder among each coal feeder, can further obtain the actual unit length load weight of the coal feeder for each first coal feeder, so as to use the actual unit length load weight and the standard load of the first coal feeder to correct the actual coal feeding amount of the coal feeder, and obtain the actual coal feeding amount actually supplied by the first coal feeder, so as to truly understand how much coal is actually applied by the first coal feeder based on the corresponding fuel master control instruction, that is, to truly understand whether the actual amount of coal supplied by the first coal feeder is light or heavy, so that the actual coal feeding amount of the first coal feeder can be used to re-determine the actual coal feeding amount of the second coal feeder later, so that the total amount of coal finally output by each first coal feeder and each second coal feeder can be equal to the total amount of coal indicated by the total coal amount instruction.

[0084] It should be noted that, in the case of the first coal feeder and the second coal feeder among each coal feeder of the coordinated control system, it means that an abnormality has occurred in the weighing system of some coal feeders in the unit unit of the coordinated system, and the actual coal supply amount fed back by the first coal feeder needs to be corrected in order to truly understand the actual coal supply amount supplied by the first coal feeder.

[0085] Optionally, the actual coal feeding amount of the first coal feeder is corrected using the standard load and the actual load weight per unit length of each first coal feeder. The process of obtaining the actual coal feeding amount of each first coal feeder can be specifically as follows: calculating the product of the actual coal feeding amount of each first coal feeder and the standard load; calculating the quotient of the product of the actual coal feeding amount of each coal feeder and the standard load and its actual load weight per unit length to obtain the actual coal feeding amount of each first coal feeder.

[0086] For example, see Figure 6 For each coal feeder, it is first possible to determine whether the coal feeder is the first coal feeder, that is, to determine whether the coal feeder has a weighing abnormality; if the coal feeder is not the first coal feeder, that is, the weighing of the coal feeder is normal, it is determined that the coal feeder is the second coal feeder, and at this time it can be determined that signal 1 has not occurred, and then signal 2 can be selected to transmit the actual coal feeding amount of the second coal feeder to the fuel master control through signal 2; if the coal feeder is the first coal feeder, that is, the weighing of the coal feeder is abnormal, it is determined that signal 1 has occurred, and then signal 3 can be selected to multiply the actual coal feeding amount of the first coal feeder by the standard load, and divide the product by the actual unit length load weight of the first coal feeder to correct the actual coal feeding amount of the first coal feeder, obtain the actual coal feeding amount of the first coal feeder, and transmit the actual coal feeding amount of the first coal feeder to the fuel master control.

[0087] S104: Correct the fuel master control instruction of each first coal feeder using the standard load and the actual load per unit length of each first coal feeder to obtain the control instruction of each first coal feeder.

[0088] In the specific process of executing step S104, when the coordinated control system determines that there are a first coal feeder and a second coal feeder among each coal feeder, for each first coal feeder, while correcting the actual coal feeding amount of the first coal feeder, it can also further correct the fuel master control instruction of the first coal feeder, so that the coal amounts supplied and fed back by the first coal feeder according to the corrected fuel master control instruction (control instruction) can be consistent, that is, the coal amount actually supplied by the first coal feeder according to the corrected fuel master control instruction is equal to the actual coal feeding amount of the first coal feeder.

[0089] Optionally, the fuel master control instruction of the first coal feeder is corrected using the standard load and the actual load per unit length of each first coal feeder. The process of obtaining the control instruction of each first coal feeder can be specifically as follows: for each first coal feeder, multiply the amount of coal indicated by the fuel master control instruction of the first coal feeder by the actual load weight per unit length; multiply the product of the amount of coal indicated by the fuel master control instruction of the first coal feeder and the actual load weight per unit length and divide it by the standard load of the first coal feeder to obtain the control instruction of the first coal feeder.

[0090] For example, see Figure 7 For each coal feeder, it can be first determined whether the coal feeder is the first coal feeder, that is, whether the coal feeder has a weighing abnormality; if the coal feeder is not the first coal feeder, that is, the weighing of the coal feeder is normal, it is determined that the coal feeder is the second coal feeder, and at this time it can be determined that signal 1 has not occurred, and then signal 2 can be selected to readjust the fuel master control instruction of the second coal feeder according to the actual coal feeder of each first coal feeder through the fuel master control; if the coal feeder is the first coal feeder, that is, the weighing of the coal feeder is abnormal, it can be determined that signal 1 has occurred, and then signal 3 can be selected, and the fuel master control multiplies the coal amount indicated by the fuel master control instruction of the first coal feeder by the actual unit length load weight; the product of the coal amount indicated by the fuel master control instruction of the first coal feeder multiplied by the actual unit length load weight is divided by the standard load of the first coal feeder to obtain the control instruction of the first coal feeder.

[0091] S105: Determine a control instruction for each second coal feeder according to the total coal quantity indicated by the total coal quantity instruction and the actual coal supply quantity of each first coal feeder.

[0092] In the specific execution process of step S105, after the coordinated control system corrects the actual coal feeding amount and the fuel master control instructions of all the first coal feeders through the fuel master control to obtain the real coal feeding amount and control instructions of each first coal feeder, it can further subtract the sum of the real coal feeder amounts of each first coal feeder from the total coal amount indicated by the total coal amount instruction through the fuel master control to obtain the remaining total coal amount required to be supplied by each second coal feeder, and divide the remaining total coal amount equally according to the number of each second coal feeder to obtain the real coal feeding amount of each second coal feeder; since there is no abnormality in the weighing system of the second coal feeder, there is no need to correct the instructions sent by the second coal feeder, and the corresponding control instructions can be directly generated according to the real coal feeding amount of the second coal feeder. In this way, it can be ensured that the sum of the coal amounts supplied by each first coal feeder and each second coal feeder according to the corresponding control instructions can be equal to the total coal amount indicated by the total coal amount instruction.

[0093] It should be noted that the control instruction of each second coal feeder can also be determined according to the total coal quantity instruction and the control instruction of each first coal feeder. Specifically, the total coal quantity indicated by the total coal quantity instruction is subtracted by the fuel master control from the coal quantity indicated by the control instruction of each first coal feeder to obtain the remaining total coal quantity required to be supplied by each second coal feeder, and the control instruction of each second coal feeder is generated according to the remaining total coal quantity. Among them, the coal quantity indicated by the control instruction of the first coal feeder is equal to the actual coal supply quantity of the first coal feeder.

[0094] S106: Send corresponding control instructions to each first coal feeder and each second coal feeder, so that the total amount of coal supplied by each first coal feeder and each second coal feeder based on the corresponding control instructions is equal to the total amount of coal indicated by the total coal amount instruction.

[0095] In the process of specifically executing step S106, after generating each first coal feeder and control instruction and each second coal feeder control instruction, corresponding control instructions can be sent to each first coal feeder and each second coal feeder through the fuel master control, so that the total amount of coal supplied by each first coal feeder and each second coal feeder based on the corresponding control instruction is equal to the total amount of coal indicated by the total coal instruction, thereby solving the problem in the prior art that due to weighing abnormalities in some coal feeders, there is a deviation between the total amount of coal actually supplied by each coal feeder and the total amount of coal actually fed back and supplied, which affects the adjustment performance of the coordinated control system, causes disturbances, and ultimately leads to poor automatic control performance of the coordinated control system, resulting in increased energy consumption of the unit.

[0096] The present invention provides a coal feeder metering correction method, which is applied to a coordinated control system to obtain the actual coal feeding amount, coal feeder speed and standard load of each coal feeder in a unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to a fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined according to a total coal amount instruction; if, according to the actual coal feeding amount, coal feeder speed and standard load of each coal feeder, it is determined that there is both a first coal feeder with weighing abnormality and a second coal feeder with normal weighing in each coal feeder, at this time, if the weighing metering of the coal feeder with weighing abnormality is not corrected, a deviation will occur between the total coal amount actually supplied by each coal feeder and the coal amount actually fed back, and this deviation will affect the regulating performance of the coordinated control system, causing disturbance, and ultimately resulting in poor automatic control performance of the coordinated control system, resulting in increased energy consumption of the unit unit; therefore, in the present application, when determining that there is a first coal feeder with weighing abnormality in each coal feeder, the actual coal feeding amount fed back by the first coal feeder is corrected by using the standard load and the actual unit length load weight of each first coal feeder. Correction is performed to obtain the actual coal supply amount of each first coal feeder, and the fuel main control instruction of the first coal feeder is corrected by using the standard load and the actual unit length load of each first coal feeder to obtain the control instruction of each first coal feeder, so that the coal supply amount of each first coal feeder based on the corresponding control instruction can be equal to the corresponding actual coal supply amount, avoiding the inconsistency between the actual supplied coal amount and the fed-back coal amount due to weighing abnormality; at the same time, the control instruction of each second coal feeder can be readjusted according to the total coal amount indicated by the total coal amount instruction and the actual coal supply amount of each first coal feeder, and the corresponding control instruction is sent to each first coal feeder and each second coal feeder, so that the total coal amount supplied by each first coal feeder and each second coal feeder based on the corresponding control instruction is equal to the total coal amount indicated by the total coal amount instruction, thereby solving the problem in the prior art that due to weighing abnormality in some coal feeders, there is a deviation between the total coal amount actually supplied by each coal feeder and the total coal amount actually fed-back supplied, which affects the adjustment performance of the coordinated control system, causes disturbances, and ultimately leads to poor automatic control performance of the coordinated control system, resulting in increased energy consumption of the unit.

[0097] Based on the embodiments of this application Figure 1 The coal feeder metering correction method provided, correspondingly, the embodiment of the present application also provides a coal feeder metering correction system, such as Figure 8 As shown, it is applied to the coordinated control system. The coal feeder metering correction system includes:

[0098] The acquisition unit 81 is used to acquire the actual coal feeding amount, the speed of the coal feeder and the standard load of each coal feeder in the unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined by the boiler master control and the fuel master control according to the total coal amount instruction;

[0099] The judging unit 82 is used to judge whether there is a first coal feeder and a second coal feeder among the coal feeders according to the actual coal feeding amount, the rotation speed and the standard load of each coal feeder; wherein the first coal feeder is the coal feeder with abnormal weighing, and the second coal feeder is the coal feeder with normal weighing;

[0100] A first correction unit 83 is used to correct the actual coal feeding amount of each first coal feeder by using the standard load and the actual unit length load weight of each first coal feeder if there is a first coal feeder and a second coal feeder among the coal feeders, so as to obtain the real coal feeding amount of each first coal feeder;

[0101] A second correction unit 84 is used to correct the fuel master control instruction of each first coal feeder by using the standard load and the actual unit length load of each first coal feeder to obtain the control instruction of each first coal feeder;

[0102] An instruction generating unit 85 is used to determine a control instruction for each second coal feeder according to the total coal quantity indicated by the total coal quantity instruction and the actual coal supply quantity of each first coal feeder;

[0103] The instruction sending unit 86 is used to send corresponding control instructions to each first coal feeder and each second coal feeder, so that the total amount of coal supplied by each first coal feeder and each second coal feeder based on the corresponding control instructions is equal to the total amount of coal indicated by the total coal amount instruction.

[0104] The specific principles and execution processes of each module in the coal feeder metering correction system disclosed in the above embodiment of the present application are the same as the coal feeder metering correction method disclosed in the above embodiment of the present application. Figure 1 The corresponding parts of the disclosed coal feeder metering correction method will not be repeated here.

[0105] The present invention provides a coal feeder metering correction system, which is applied to a coordinated control system to obtain the actual coal feeding amount, coal feeder speed and standard load of each coal feeder in a unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined according to the total coal amount instruction; if it is determined that there is both a first coal feeder with weighing abnormality and a second coal feeder with normal weighing in each coal feeder according to the actual coal feeding amount, coal feeder speed and standard load of each coal feeder, at this time, if the weighing metering of the coal feeder with weighing abnormality is not corrected, it will cause a deviation between the total coal amount actually supplied by each coal feeder and the coal amount actually fed back, and this deviation will affect the regulating performance of the coordinated control system, causing disturbance, and ultimately leading to poor automatic control performance of the coordinated control system, resulting in increased energy consumption of the unit unit; therefore, in the case of determining that there is a first coal feeder with weighing abnormality in each coal feeder, the present application uses the standard load of each first coal feeder and the actual unit length load weight to correct the actual coal feeding amount fed back by the first coal feeder Correction is performed to obtain the actual coal supply amount of each first coal feeder, and the fuel main control instruction of the first coal feeder is corrected by using the standard load and the actual unit length load of each first coal feeder to obtain the control instruction of each first coal feeder, so that the coal supply amount of each first coal feeder based on the corresponding control instruction can be equal to the corresponding actual coal supply amount, avoiding the inconsistency between the actual supplied coal amount and the fed-back coal amount due to weighing abnormality; at the same time, the control instruction of each second coal feeder can be readjusted according to the total coal amount indicated by the total coal amount instruction and the actual coal supply amount of each first coal feeder, and the corresponding control instruction is sent to each first coal feeder and each second coal feeder, so that the total coal amount supplied by each first coal feeder and each second coal feeder based on the corresponding control instruction is equal to the total coal amount indicated by the total coal amount instruction, thereby solving the problem in the prior art that due to weighing abnormality in some coal feeders, there is a deviation between the total coal amount actually supplied by each coal feeder and the total coal amount actually fed-back supplied, which affects the adjustment performance of the coordinated control system, causes disturbances, and ultimately leads to poor automatic control performance of the coordinated control system, resulting in increased energy consumption of the unit.

[0106] Optionally, the judging unit comprises:

[0107] A first determining unit is used to determine the load weight per unit length of each coal feeder according to the actual coal feeding amount and the rotation speed of each coal feeder;

[0108] A second determination unit is used to determine the metering error of each coal feeder according to the load weight per unit length and the standard load of each coal feeder;

[0109] The first judgment subunit is used to judge whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders according to the metering errors of the coal feeders and the operating status of the pulverizing system corresponding to the coal feeders;

[0110] The third determining unit is configured to determine whether there is a first coal feeder and a second coal feeder among the coal feeders if there is a coal feeder with abnormal weighing and there is a coal feeder with normal weighing among the coal feeders.

[0111] Optionally, the first determining unit is specifically configured to:

[0112] For each coal feeder, the quotient of the actual coal feeding amount of the coal feeder and the rotation speed of the coal feeder is calculated to obtain the load weight per unit length of the coal feeder.

[0113] Optionally, the second determining unit includes:

[0114] A first calculation unit is used to calculate the difference between the load weight per unit length of each coal feeder and the standard load;

[0115] The second calculation unit is used to calculate the quotient of the difference and the standard load, and take the absolute value of the quotient of the difference and the standard load to obtain the metering error of the coal feeder.

[0116] Optionally, the first judgment subunit includes:

[0117] The second judgment subunit is used to judge, for each coal feeder, whether the metering error of the coal feeder is greater than a preset deviation, and whether the operating state of the pulverizing system corresponding to the coal feeder is running;

[0118] The fourth determination unit is used to determine that the weighing and metering of the coal feeder is abnormal if the metering error of the coal feeder is greater than a preset deviation and the operation state of the pulverizing system corresponding to the coal feeder is running;

[0119] a fifth determination unit, for determining that the weighing and metering of the coal feeder is normal if the metering error of the coal feeder is not greater than a preset deviation, or the operating state of the pulverizing system corresponding to the coal feeder is not in operation;

[0120] The sixth determining unit is configured to determine whether there is a first coal feeder and a second coal feeder among the coal feeders if there is a coal feeder with abnormal weighing and there is a coal feeder with normal weighing among the coal feeders.

[0121] Optionally, the first correction unit includes:

[0122] a third calculation unit, configured to calculate the product of an actual coal feeding amount and a standard load of each first coal feeder if there is a first coal feeder and a second coal feeder among the coal feeders;

[0123] The fourth calculation unit is used to calculate the product of the actual coal feeding amount and the standard load of each coal feeder and the quotient of its actual load weight per unit length to obtain the actual coal feeding amount of each first coal feeder.

[0124] Optionally, the second correction unit comprises:

[0125] a fifth calculation unit, for multiplying, for each first coal feeder, the amount of coal indicated by the fuel master control instruction of the first coal feeder by the actual load weight per unit length;

[0126] The sixth calculation unit is used to obtain the control instruction of the first coal feeder by multiplying the coal quantity indicated by the fuel main control instruction of the first coal feeder by the actual load weight per unit length and dividing the product by the standard load of the first coal feeder.

[0127] The present application embodiment provides an electronic device, such as Fig. 9 As shown, the electronic device includes a processor 901 and a memory 902, the memory 902 is used to store program codes and data for metering correction of the device's coal feeder, and the processor 901 is used to call the program instructions in the memory to execute the steps shown in the coal feeder metering correction method in the above embodiment.

[0128] An embodiment of the present application provides a storage medium, which includes a storage program, wherein when the program is running, the device where the storage medium is located is controlled to execute the coal feeder metering correction method shown in the above embodiment.

[0129] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, in which the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0130] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0131] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0132] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A coal feeder metering correction method, characterized in that: Applied to a coordinated control system, the method comprises: Obtaining the actual coal feeding amount, the speed of the coal feeder and the standard load of each coal feeder in the unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined by the boiler master control and the fuel master control according to the total coal amount instruction; According to the actual coal feeding amount, the rotation speed and the standard load of each of the coal feeders, it is judged whether there is a first coal feeder and a second coal feeder among the coal feeders; wherein the first coal feeder is a coal feeder with abnormal weighing, and the second coal feeder is a coal feeder with normal weighing; If there is a first coal feeder and a second coal feeder among the coal feeders, the actual coal feeding amount of the first coal feeder is corrected by using the standard load and the actual load weight per unit length of each of the first coal feeders to obtain the real coal feeding amount of each of the first coal feeders; Correcting the fuel master control instruction of each of the first coal feeders by using the standard load and the actual unit length load of each of the first coal feeders to obtain the control instruction of each of the first coal feeders; determining a control instruction for each of the second coal feeders according to the total coal quantity indicated by the total coal quantity instruction and the actual coal supply quantity of each of the first coal feeders; Corresponding control instructions are sent to each of the first coal feeders and each of the second coal feeders, so that the total amount of coal supplied by each of the first coal feeders and each of the second coal feeders based on the corresponding control instructions is equal to the total amount of coal indicated by the total coal amount instruction.

2. The method according to claim 1, characterized in that: The determining, according to the actual coal feeding amount, the rotation speed and the standard load of each of the coal feeders, whether there is a first coal feeder and a second coal feeder in each of the coal feeders comprises: Determining the load weight per unit length of each coal feeder according to the actual coal feeding amount and the rotation speed of each coal feeder; Determining the metering error of each of the coal feeders according to the load weight per unit length and the standard load of each of the coal feeders; According to the metering errors of the coal feeders and the operating status of the pulverizing system corresponding to the coal feeders, it is determined whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders; If there is a coal feeder with abnormal weighing and there is a coal feeder with normal weighing among the coal feeders, it is determined that there is a first coal feeder and a second coal feeder among the coal feeders.

3. The method according to claim 2, characterized in that Determining the measurement error of each coal feeder according to the load weight per unit length and the standard load of each coal feeder comprises: For each of the coal feeders, the quotient of the actual coal feeding amount of the coal feeder and the rotation speed of the coal feeder is calculated to obtain the load weight per unit length of the coal feeder.

4. The method according to claim 2, characterized in that: Determining the measurement error of each coal feeder according to the load weight per unit length and the standard load of each coal feeder comprises: For each of the coal feeders, calculating the difference between the load weight per unit length of the coal feeder and the standard load; The quotient of the difference and the standard load is calculated, and the absolute value of the quotient of the difference and the standard load is taken to obtain the metering error of the coal feeder.

5. The method according to claim 2, characterized in that: The method of judging whether there are coal feeders with abnormal weighing and coal feeders with normal weighing among the coal feeders according to the metering errors of the coal feeders and the operating status of the pulverizing system corresponding to the coal feeders comprises: For each of the coal feeders, determining whether a metering error of the coal feeder is greater than a preset deviation, and whether an operating state of a pulverizing system corresponding to the coal feeder is in operation; If the metering error of the coal feeder is greater than the preset deviation, and the operation state of the pulverizing system corresponding to the coal feeder is running, it is determined that the weighing metering of the coal feeder is abnormal; If the metering error of the coal feeder is not greater than the preset deviation, or the operating state of the pulverizing system corresponding to the coal feeder is not running, it is determined that the weighing and metering of the coal feeder is normal; If there is a coal feeder with abnormal weighing and there is a coal feeder with normal weighing among the coal feeders, it is determined that there is a first coal feeder and a second coal feeder among the coal feeders.

6. The method according to claim 1, characterized in that If there is a first coal feeder and a second coal feeder among the coal feeders, the actual coal feeding amount of the first coal feeder is corrected by using the standard load and the actual load weight per unit length of each of the first coal feeders to obtain the real coal feeding amount of each of the first coal feeders, including: If there is a first coal feeder and a second coal feeder among the coal feeders, calculating the product of the actual coal feeding amount and the standard load of each of the first coal feeders; The actual coal supply amount of each of the first coal feeders is obtained by calculating the product of the actual coal supply amount and the standard load of each of the first coal feeders and the quotient of the actual load weight per unit length.

7. The method according to claim 1, characterized in that The method of correcting the fuel master control instruction of each of the first coal feeders by using the standard load and the actual unit length load of each of the first coal feeders to obtain the control instruction of each of the first coal feeders includes: For each of the first coal feeders, multiply the amount of coal indicated by the fuel master control instruction of the first coal feeder by the actual load weight per unit length; The coal feeding amount control instruction of the first coal feeder is obtained by multiplying the coal amount indicated by the fuel master control instruction of the first coal feeder by the actual load weight per unit length and dividing the product by the standard load of the first coal feeder.

8. A coal feeder metering correction system, characterized in that: Applied to the coordinated control system, the coal feeder metering correction includes: an acquisition unit, used for acquiring the actual coal feeding amount, the coal feeder speed and the standard load of each coal feeder in the unit unit of the coordinated control system; wherein the actual coal feeding amount of the coal feeder is fed back by the coal feeder according to the fuel master control instruction of the coal feeder, and the fuel master control instruction of the coal feeder is determined by the boiler master control and the fuel master control according to the total coal amount instruction; a judgment unit, configured to judge whether there is a first coal feeder and a second coal feeder among the coal feeders according to an actual coal feeding amount, a rotation speed of the coal feeder and a standard load of each of the coal feeders; wherein the first coal feeder is a coal feeder with abnormal weighing, and the second coal feeder is a coal feeder with normal weighing; a first correction unit, configured to correct the actual coal feeding amount of each of the first coal feeders by using the standard load and the actual load weight per unit length of each of the first coal feeders, if there is a first coal feeder and a second coal feeder among the coal feeders, so as to obtain the real coal feeding amount of each of the first coal feeders; a second correction unit, configured to correct the fuel master control instruction of each of the first coal feeders by using the standard load and the actual unit length load of each of the first coal feeders to obtain a control instruction of each of the first coal feeders; an instruction generating unit, configured to determine a control instruction for each of the second coal feeders according to the total coal quantity indicated by the total coal quantity instruction and the actual coal supply quantity of each of the first coal feeders; An instruction sending unit is used to send corresponding control instructions to each of the first coal feeders and each of the second coal feeders, so that the total amount of coal supplied by each of the first coal feeders and each of the second coal feeders based on the corresponding control instructions is equal to the total amount of coal indicated by the total coal amount instruction.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the processor and the memory are connected via a communication bus; wherein the processor is used to call and execute a program stored in the memory; The memory is used to store a program, and the program is used to implement the coal feeder metering correction method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute the coal feeder metering correction method as described in any one of claims 1-7.

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