A control method, device, equipment and storage medium for the load of a heating unit

Abstract

The present invention provides a control method, device, equipment and storage medium for the load of a heating unit. The method includes: receiving a target load instruction and the actual load generated by the unit; performing a first speed limit link processing on the target load instruction to obtain a coordinated load instruction; obtaining a unit load deviation by taking the difference between the coordinated load instruction and the actual load generated by the unit, and obtaining a first control parameter according to the unit load deviation; performing a speed limit link processing on the target load instruction and the coordinated load instruction to obtain a first load setting value of the heating steam extraction throttling system and a second load setting value of the condensate throttling system; obtaining a second control parameter and a third control parameter according to the first load setting value and the second load setting value. By coupling the heating steam extraction throttling system and the condensate throttling system with the original boiler-turbine coordinated control system, the present invention reduces the load increment of the original boiler-turbine coordinated control system, reduces the parameter fluctuation of the unit, and enhances the stability and safety during the operation of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal control of heating units, and specifically relates to a control method, device, equipment and storage medium for the load of a heating unit. Background Art

[0002] A heating unit is an integrated heating unit introduced to meet user needs, and can realize the rapid docking of on-site boilers and systems. During the process of changing load, the heating unit is prone to parameter fluctuations. On the premise of large-scale grid connection of renewable energy, the heating unit faces frequent peak shaving and frequency modulation processes, and the parameter fluctuations seriously affect the life and power generation efficiency of the unit, and will threaten production safety in severe cases. At present, a number of studies have shown that condensate throttling technology and extraction steam throttling technology for heating can be used to assist the peak shaving and frequency modulation process, but there is little research on the control method when the condensate throttling technology and the extraction steam throttling technology for heating are coupled in the heating unit. During the process of controlling the load of the heating unit, the parameter fluctuations are large, and the operation stability and safety are poor. Summary of the Invention

[0003] In view of this, the present invention provides a control method, device, equipment and storage medium for the load of a heating unit, so as to solve the problems of single control system, large parameter fluctuations, poor operation stability and safety during the control process of the load of the heating unit.

[0004] In a first aspect, an embodiment of the present invention provides a control method for the load of a heating unit, and this method includes:

[0005] Receiving a target load command and the actual load generated by the unit;

[0006] Performing a first speed limit link processing on the target load command to obtain a coordinated load command;

[0007] Taking the difference between the coordinated load command and the actual load generated by the unit to obtain a unit load deviation, and obtaining a first control parameter of the original unit boiler coordinated control system according to the unit load deviation;

[0008] Performing a speed limit link processing on the target load command and the coordinated load command to obtain a first load setting value of the extraction steam throttling system for heating and a second load setting value of the condensate throttling system;

[0009] Obtaining a second control parameter of the extraction steam throttling control system for heating according to the first load setting value of the extraction steam throttling system for heating, and obtaining a third control parameter of the condensate throttling control system according to the second load setting value of the condensate throttling system;

[0010] Controlling the load of the heating unit based on the first control parameter, the second control parameter, and the third control parameter.

[0011] This method couples the extraction steam throttling system for heating, the condensate throttling system with the original coordinated control system of the boiler and turbine. During the transient process, the load increment of the unit is jointly borne by the original coordinated control system of the boiler and turbine, the extraction steam throttling system for heating, and the condensate throttling system, reducing the load increment of the original coordinated control system of the boiler and turbine, slowing down the load change rate, reducing the parameter fluctuations of the unit, and enhancing the stability and safety during the operation of the unit.

[0012] Optionally, the step of performing a speed limit processing on the target load command and the coordinated load command includes:

[0013] Performing a second speed limit processing on the target load command to obtain a stable load command of the unit;

[0014] Taking the difference between the coordinated load command and the stable load command of the unit to obtain a first load increment;

[0015] Performing a third speed limit processing on the first load increment to obtain a first load setting value of the extraction steam throttling system for heating;

[0016] Taking the difference between the first load increment and the first load setting value to obtain a second load increment;

[0017] Performing a fourth speed limit processing on the second load increment to obtain a second load setting value of the condensate throttling system.

[0018] Through the processing of three speed limit links, the first load setting value of the extraction steam throttling system for heating and the second load setting value of the condensate throttling system are obtained, so that the load command is decomposed, and the extraction steam throttling system for heating and the condensate throttling system control the corresponding parameters according to the decomposed load setting values, thereby accurately adjusting the load change of the heating unit.

[0019] Optionally, the first control parameters include: the opening of the turbine control valve, the coal feeding amount, and the water feeding amount; the second control parameter is the extraction steam throttling flow rate for heating; the third control parameter is the condensate throttling flow rate.

[0020] By controlling the opening of the turbine control valve, the coal feeding amount, the water feeding amount, the extraction steam throttling flow rate for heating, and the condensate throttling flow rate, the load input to the heating unit is controlled, that is, the actual generated load of the unit is controlled, so that the actual generated load is as equal as possible to the target load command. The three systems are controlled simultaneously to slow down the load change rate of the heating unit.

[0021] Optionally, the step of performing a first speed limit processing on the target load command to obtain a coordinated load command includes:

[0022] Comparing the maximum load change rate of the unit under the limitation of the longest dispatching time acceptable by the power grid and the load change rate manually set by the operator, and taking the smaller value of the two as the first load change rate;

[0023] The coordinated load command is calculated according to the first load change rate, and the calculation method is as follows:

[0024]

[0025] Among them, Pe1 is the coordinated load command, Pe00 is the initial load of the unit, Pe0 is the target load of the unit, Rate1 is the first load change rate, and t s1 is the unit adjustment time at the first load change rate.

[0026] Select the smaller value between the maximum load change rate of the unit under the longest dispatching time limit acceptable to the power grid and the load change rate manually set by the operator as the first load change rate to ensure the normal operation of the heat supply unit. When the coordinated load command reaches the target load of the unit, the coordinated load command no longer changes to ensure the stable operation of the heat supply unit.

[0027] Optionally, the step of performing a second speed limit link processing on the target load command to obtain the stable load command of the unit includes:

[0028] Compare the maximum load change rate when the unit parameters are stably operating and the load change rate manually set by the operator, and take the smaller value of the two as the second load change rate;

[0029] Calculate the stable load command of the unit according to the second load change rate, and the calculation method is as follows:

[0030]

[0031] Among them, Pe2 is the stable load command of the unit, Rate2 is the second load change rate, and t s2 is the unit adjustment time at the second load change rate.

[0032] Select the smaller value between the maximum load change rate when the unit parameters are stably operating and the load change rate manually set by the operator as the second load change rate to ensure the stable operation of the heat supply unit. When the stable load command of the unit reaches the target load of the unit, the stable load command of the unit no longer changes to maintain the stable operation state of the heat supply unit.

[0033] Optionally, the calculation method of the extraction steam throttle flow of the heat supply includes:

[0034] Compare the maximum load increment that the heat network can provide obtained according to the current operation state of the heat network, the load value of the extraction steam throttle system set by the operator, and the difference between the coordinated load command and the stable load command, and take the minimum value of the three as the first load setting value of the extraction steam throttle system of the heat supply;

[0035] Calculate the ratio of the first load setting value of the heating steam extraction throttling system to the work done by the unit heating steam extraction flow obtained by the equivalent heat drop method, and use this ratio as the heating steam extraction throttle flow rate.

[0036] Compare three values that affect the load of the heating steam extraction throttling system, and take the minimum value as the first load setting value to avoid over-regulation and ensure the safe operation of the heating unit. The calculation of the heating steam extraction throttle flow rate replaces the complex operation of the entire system with simple local operations, which simplifies the calculation steps while ensuring the accuracy of the calculation results.

[0037] Optionally, the calculation method of the condensate throttle flow rate includes:

[0038] Compare the maximum load increment that can be provided under the deaerator water level limit, the load value of the condensate throttling system set by the operator, and the difference between the coordinated load command and the stable load command and the load setting value of the heating steam extraction throttling system, and take the minimum value of the three as the second load setting value of the condensate throttle flow rate system;

[0039] Calculate the ratio of the second load setting value of the condensate throttle flow rate system to the increase in the unit power of the unit when the condensate flow rate changes obtained by the equivalent heat drop method, and use this ratio as the condensate throttle flow rate.

[0040] Compare three values that affect the load of the condensate throttle flow rate system, and take the minimum value as the second load setting value to avoid over-regulation and ensure the safe operation of the heating unit. The calculation of the condensate throttle flow rate replaces the complex operation of the entire system with simple local operations, which simplifies the calculation steps while ensuring the accuracy of the calculation results.

[0041] In a second aspect, an embodiment of the present invention provides a control device for the load of a heating unit, and the device includes:

[0042] A receiving module, which receives a target load command and the actual load of the unit;

[0043] A first processing module, which is used to perform a first speed limit link processing on the target load command to obtain a coordinated load command;

[0044] A first control parameter acquisition module, which is used to subtract the actual load of the unit from the coordinated load command to obtain a unit load deviation, and further obtain a first control parameter of the original unit boiler coordinated control system;

[0045] A second processing module, which performs speed limit link processing on the target load command and the coordinated load command to obtain a first load setting value of the heating steam extraction throttling system and a second load setting value of the condensate throttling system;

[0046] The second control parameter acquisition module is configured to obtain a second control parameter of the extraction steam throttling control system and a third control parameter of the condensate throttling control system of the heat supply unit according to a first load set value of the extraction steam throttling system for heat supply and a second load set value of the condensate throttling system;

[0047] The control module is configured to control the load of the heat supply unit based on the first control parameter, the second control parameter, and the third control parameter.

[0048] By coupling the extraction steam throttling system for heat supply, the condensate throttling system with the original coordinated control system of the boiler and turbine, during the transient process, the load increment of the unit is jointly borne by the original coordinated control system of the boiler and turbine, the extraction steam throttling system for heat supply and the condensate throttling system, reducing the load increment of the original coordinated control system of the boiler and turbine, slowing down the load change rate, reducing the parameter fluctuations of the unit, and enhancing the stability and safety during the operation of the unit.

[0049] In a third aspect, an embodiment of the present invention provides a computer device, including: a memory and a processor, which are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the method described in the first aspect or any optional implementation manner of the first aspect.

[0050] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing the computer to execute the method described in the first aspect or any optional implementation manner of the first aspect. Description of the Drawings

[0051] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0052] Figure 1 It is a flowchart of a control method for the load of a heat supply unit provided by an embodiment of the present invention;

[0053] Figure 2 It is a flowchart of a specific embodiment of a control method for the load of a heat supply unit provided by an embodiment of the present invention;

[0054] Figure 3 It is a schematic structural diagram of a control device for the load of a heat supply unit provided by an embodiment of the present invention;

[0055] Figure 4A schematic structural diagram of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the internal communication of two elements. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0059] The technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] An embodiment of the present invention provides a method for controlling the load of a heat supply unit. By invoking the heat network energy storage of the heat supply extraction throttling control system and the deaerator energy storage of the condensate throttling control system, the parameter fluctuations during the operation of the heat supply unit are minimized as much as possible, and the stable and efficient operation of the heat supply unit is maintained. As Figure 1 shown, this method includes:

[0061] Step S1: Receive a target load command and the actual load generated by the unit. Exemplarily, the target load command is the target load command required for the heat supply unit to output according to the regulations of the State Grid, and the actual load generated by the unit is the actual load output by the heat supply unit monitored in real time, which needs to be adjusted in real time so that the actual load generated by the unit is equal to the target load command.

[0062] Step S2: Perform the first speed limit process on the target load command to obtain a coordinated load command. Exemplarily, as Figure 2 shown, the steps of the first speed limit process are: Compare the maximum load change rate of the unit under the longest scheduling time acceptable to the power grid and the load change rate manually set by the operator, and take the smaller value of the two as the first load change rate.

[0063] Calculate the coordinated load command according to the first load change rate, and its calculation method is as follows:

[0064]

[0065] where, Pe1 is the coordinated load command, unit: MW; Pe00 is the initial load of the unit, unit: MW; Pe0 is the target load of the unit, unit: MW; Rate1 is the first load change rate, unit: MW / s; t s1 is the adjustment time of the unit under the first load change rate, unit: s.

[0066] The embodiment of the present invention selects the smaller value between the maximum load change rate of the unit under the longest scheduling time acceptable to the power grid and the load change rate manually set by the operator as the first load change rate to ensure the normal operation of the heat supply unit. When the coordinated load command reaches the target load of the unit, the coordinated load command no longer changes, ensuring the stable operation of the heat supply unit.

[0067] Step S3: Subtract the actual load of the unit from the coordinated load command to obtain the unit load deviation, and obtain the first control parameter of the original unit-boiler coordinated control system according to the unit load deviation. Exemplarily, the unit load deviation calculation formula is:

[0068] ΔPe = Pe1 - Pe5

[0069] where, △Pe is the unit load deviation, unit: MW; Pe5 is the actual load of the unit, unit: MW. The original unit-boiler coordinated control system obtains the first control parameter according to the unit load deviation, thereby controlling the corresponding equipment to adjust the load of the heat supply unit. The first control parameter includes: the opening u of the steam turbine regulating valve t , the coal feeding amount B rt and the feed water amount D fw . The control process of the original unit-boiler coordinated control system here is the prior art and will not be elaborated here.

[0070] Step S4: Perform speed limit processing on the target load command and the coordinated load command to obtain the first load setting value of the extraction steam throttling system for heat supply and the second load setting value of the condensate throttling system. Exemplarily, the target load command and the coordinated load command are processed through three speed limit links, so that the load commands are decomposed. The extraction steam throttling system for heat supply and the condensate throttling system control corresponding parameters according to the decomposed load setting values, thereby accurately adjusting the load of the heat supply unit. As Figure 2 shown, the specific steps of performing speed limit processing on the target load command and the coordinated load command are as follows:

[0071] Step S41: Perform second speed limit processing on the target load command to obtain the unit stable load command. Specifically, compare the maximum load change rate when the unit parameters are operating stably and the load change rate manually set by the operator, and take the smaller value of the two as the second load change rate;

[0072] Calculate the unit stable load command according to the second load change rate, and its calculation method is as follows:

[0073]

[0074] where, Pe2 is the unit stable load command, unit: MW; Rate2 is the second load change rate, unit: MW / s; t s2 is the unit regulation time at the second load change rate, unit: s.

[0075] Select the smaller value between the maximum load change rate when the unit parameters are operating stably and the load change rate manually set by the operator as the second load change rate to ensure the stable operation of the heat supply unit. When the unit stable load command reaches the unit target load, the unit stable load command no longer changes, maintaining the stable operation state of the heat supply unit.

[0076] Step S42: Subtract the unit stable load command from the coordinated load command to obtain the first load increment. Exemplarily, the calculation formula for the first load increment is:

[0077] ΔPe1 = Pe1 - Pe2

[0078] where, Pe1 is the coordinated load command, unit: MW; Pe2 is the unit stable load command, unit: MW; △Pe1 is the first load increment, unit: MW.

[0079] Step S43: Process the first load increment through a third speed limit link to obtain the first load set value of the extraction steam throttling system for heating. Exemplarily, compare the maximum load increment that the heat network can provide according to the current operating state of the heat network, the load value of the extraction steam throttling system for heating set by the operator, and the difference between the coordinated load command and the stable load command, and take the minimum value among the three as the first load set value of the extraction steam throttling system for heating. The calculation formula is:

[0080] Pe3 = min{ΔPe h , Pe h , Pe1 - Pe2}

[0081] where Pe3 is the first load set value of the extraction steam throttling system for heating, unit: MW; △Pe h is the maximum load increment obtained according to the current operating state of the heat network, unit: MW; Pe h is the load value of the extraction steam throttling system for heating set by the operator, unit: MW; Pe1 is the coordinated load command, unit: MW; Pe2 is the stable load command of the unit, unit: MW.

[0082] In the embodiment of the present invention, by comparing three values that affect the load of the extraction steam throttling system for heating and taking the minimum value among them as the first load set value, over-regulation is avoided, ensuring the safe operation of the heating unit.

[0083] Step S44: Take the difference between the first load increment and the first load set value to obtain the second load increment. Exemplarily, the calculation formula for the first load increment is:

[0084] ΔPe2 = ΔPe1 - Pe3

[0085] where △Pe1 is the first load increment, unit: MW; Pe3 is the first load set value, unit: MW; △Pe2 is the second load increment, unit: MW.

[0086] Step S45: Process the second load increment through a fourth speed limit link to obtain the second load set value of the condensate throttling system. Exemplarily, compare the maximum load increment that can be provided under the deaerator water level limit, the load value of the condensate throttling system set by the operator, and the difference between the coordinated load command and the sum of the stable load command and the load set value of the extraction steam throttling system, and take the minimum value among the three as the second load set value of the condensate throttling system. The calculation formula is:

[0087] Pe4 = min{ΔPe d , Pe d , Pe1 - Pe2 - Pe3}

[0088] Among them, Pe4 is the second load setting value of the condensate throttling flow system, unit: MW; △Pe d is the maximum load increment that can be provided under the deaerator water level limit, unit: MW; Pe d is the load value of the condensate throttling system set by the operator, unit: MW; Pe1 is the coordinated load command, unit: MW; Pe2 is the unit stable load command, unit: MW; Pe3 is the first load setting value, unit: MW.

[0089] In the embodiment of the present invention, by comparing three values that affect the load of the condensate throttling flow system, the minimum value among them is used as the second load setting value, avoiding excessive regulation and ensuring the safe operation of the heating unit.

[0090] Step S5: Obtain the second control parameter of the extraction steam throttling control system according to the first load setting value of the extraction steam throttling system for heating, and obtain the third control parameter of the condensate throttling control system according to the second load setting value of the condensate throttling system. Exemplarily, the second control parameter is the extraction steam throttling flow rate. Calculate the ratio of the first load setting value of the extraction steam throttling system for heating to the work done by the unit extraction steam flow obtained by the equivalent heat drop method, and use this ratio as the extraction steam throttling flow rate. The calculation formula is:

[0091]

[0092] Among them, G gr is the extraction steam throttling flow rate, unit: kg; w gr is the work done by the unit extraction steam flow obtained by the equivalent heat drop method, unit: MW / kg. The equivalent heat drop method is a method based on the thermodynamic principle of heat-work conversion to study heat-work conversion and energy utilization degree, which belongs to the prior art and will not be elaborated here.

[0093] The third control parameter is the condensate throttling flow rate. Calculate the ratio of the second load setting value of the condensate throttling flow system to the increase in unit power of the unit when the condensate flow rate changes obtained by the equivalent heat drop method, and use this ratio as the condensate throttling flow rate. The calculation formula is:

[0094]

[0095] Among them, G cond is the extraction steam throttling flow rate, unit: kg; w gr is the increase in unit power of the unit when the condensate flow rate changes obtained by the equivalent heat drop method, unit: MW / kg.

[0096] Calculating the extraction steam throttling flow rate and the condensate throttling flow rate replaces the complex operation of the entire system with simple local operations, simplifies the calculation steps while ensuring the accuracy of the calculation results.

[0097] Step S6: Control the load of the heat supply unit based on the first control parameter, the second control parameter, and the third control parameter. Exemplarily, by controlling the opening of the steam turbine regulating valve, the coal feeding amount, the water feeding amount, the throttling flow rate of the heat supply extraction steam, and the throttling flow rate of the condensate water, the load input to the heat supply unit is controlled, that is, the actual generated load of the unit is controlled, so that the actual generated load is as equal as possible to the target load command. The three systems are controlled simultaneously to slow down the load change rate of the heat supply unit.

[0098] This method couples the heat supply extraction steam throttling system, the condensate water throttling system with the original unit boiler coordinated control system. During the transient process, the load increment of the unit is jointly borne by the original unit boiler coordinated control system, the heat supply extraction steam throttling system, and the condensate water throttling system, reducing the load increment of the original unit boiler coordinated control system, slowing down the load change rate, reducing the parameter fluctuation of the unit, and enhancing the stability and safety during the operation of the unit.

[0099] The embodiment of the present invention also provides a control device for the load of a heat supply unit, as Figure 3 shown, the device includes:

[0100] A receiving module 1, which receives the target load command and the actual generated load of the unit. For detailed content, refer to the relevant description in step S1 of the above method embodiment, and details will not be elaborated here.

[0101] A first processing module 2, which is used to perform a first speed limit link processing on the target load command to obtain a coordinated load command. For detailed content, refer to the relevant description in step S2 of the above method embodiment, and details will not be elaborated here.

[0102] A first control parameter acquisition module 3, which is used to subtract the actual generated load of the unit from the coordinated load command to obtain the unit load deviation, and further obtain the first control parameter of the original unit boiler coordinated control system. For detailed content, refer to the relevant description in step S3 of the above method embodiment, and details will not be elaborated here.

[0103] A second processing module 4, which performs a speed limit link processing on the target load command and the coordinated load command to obtain the first load setting value of the heat supply extraction steam throttling system and the second load setting value of the condensate water throttling system. For detailed content, refer to the relevant description in step S4 of the above method embodiment, and details will not be elaborated here.

[0104] A second control parameter acquisition module 5, which is used to obtain the second control parameter of the heat supply extraction steam throttling control system and the third control parameter of the condensate water throttling control system according to the first load setting value of the heat supply extraction steam throttling system and the second load setting value of the condensate water throttling system. For detailed content, refer to the relevant description in step S5 of the above method embodiment, and details will not be elaborated here.

[0105] A control module 6, configured to control the load of a heat supply unit based on a first control parameter, a second control parameter, and a third control parameter. For detailed content, refer to the relevant description in step S6 of the above method embodiment, which will not be elaborated here.

[0106] By coupling the heat supply extraction steam throttling system, the condensate water throttling system with the original unit boiler coordinated control system, during the transient process, the unit load increment is jointly borne by the original unit boiler coordinated control system, the heat supply extraction steam throttling system, and the condensate water throttling system, reducing the load increment of the original unit boiler coordinated control system, slowing down the load change rate, reducing the unit parameter fluctuations, and enhancing the stability and safety during the unit operation.

[0107] Figure 4 The structure diagram of the computer device in the embodiment of the present invention is shown, including: a processor 901 and a memory 902, where the processor 901 and the memory 902 can be connected through a bus or other means. Figure 4 Taking the connection through the bus as an example.

[0108] The processor 901 can be a central processing unit (CPU). The processor 901 can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. chips, or combinations of the above various types of chips.

[0109] The memory 902, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the methods in the above method embodiments. The processor 901 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions, and modules stored in the memory 902, that is, implementing the methods in the above method embodiments.

[0110] The memory 902 may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function. The data storage area may store data created by the processor 901 and the like. In addition, the memory 902 may include high-speed random access memory and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 902 may optionally include a memory remotely disposed relative to the processor 901, and these remote memories may be connected to the processor 901 through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0111] One or more modules are stored in the memory 902 and, when executed by the processor 901, perform the methods in the above method embodiments.

[0112] Specific details of the above computer device may be understood by referring to the corresponding related descriptions and effects in the above method embodiments, and will not be elaborated here.

[0113] Those skilled in the art can understand that all or part of the processes of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The implemented program can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the above method embodiments. Among them, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), etc.; the storage medium may also include a combination of the above types of memories.

[0114] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A control method for the load of a heating unit, characterized in that, The method includes: Receiving a target load instruction and the actual load of the unit; Perform a first speed limit processing on the target load command to obtain a coordinated load command, including: comparing the maximum load change rate of the unit under the longest scheduling time limit acceptable to the power grid and the load change rate manually set by the operator, and taking the smaller value of the two as the first load change rate; calculating the coordinated load command according to the first load change rate, and its calculation method is as follows: where Pe1 is the coordinated load command, Pe00 is the initial load of the unit, Pe0 is the target load of the unit, Rate1 is the first load change rate, and t s1 is the unit adjustment time at the first load change rate; Taking the difference between the coordinated load instruction and the actual load of the unit to obtain a unit load deviation, and obtaining a first control parameter of the original coordinated control system of the boiler and turbine according to the unit load deviation; Perform speed limit processing on the target load instruction and the coordinated load instruction to obtain a first load setting value for the extraction steam throttling system and a second load setting value for the condensate throttling system. The speed limit processing includes: second speed limit processing, third speed limit processing, and fourth speed limit processing. Among them, the second speed limit processing includes: comparing the maximum load change rate during stable operation of the unit parameters with the load change rate manually set by the operator, and taking the smaller value of the two as the second load change rate; calculating the stable load instruction of the unit according to the second load change rate, and its calculation method is as follows: where Pe2 is the stable load instruction of the unit, Rate2 is the second load change rate, and t s2 is the unit regulation time at the second load change rate; the third speed limit processing includes: comparing the maximum load increment that the heat network can provide obtained according to the current heat network operation status, the load value of the extraction steam throttling system set by the operator, and the difference between the coordinated load instruction and the stable load instruction, and taking the minimum value of the three as the first load setting value of the extraction steam throttling system; the fourth speed limit processing includes: comparing the maximum load increment that can be provided under the deaerator water level limit, the load value of the condensate throttling system set by the operator, and the difference between the coordinated load instruction and the sum of the stable load instruction and the load setting value of the extraction steam throttling system, and taking the minimum value of the three as the second load setting value of the condensate throttling system; Obtaining a second control parameter of the extraction steam throttling control system according to the first load setting value of the extraction steam throttling system, and obtaining a third control parameter of the condensate throttling control system according to the second load setting value of the condensate throttling system; Controlling the load of the heating unit based on the first control parameter, the second control parameter, and the third control parameter.

2. The control method for the load of the heat supply unit according to claim 1, characterized in that The step of performing a speed limit link process on the target load instruction and the coordinated load instruction includes: Performing a second speed limit link process on the target load instruction to obtain a unit stable load instruction; Taking the difference between the coordinated load instruction and the unit stable load instruction to obtain a first load increment; Performing a third speed limit link process on the first load increment to obtain a first load setting value of the extraction steam throttling system; Taking the difference between the first load increment and the first load setting value to obtain a second load increment; Performing a fourth speed limit link process on the second load increment to obtain a second load setting value of the condensate throttling system.

3. The control method for the load of a heating unit according to claim 1, wherein The first control parameters include: the opening of the steam turbine regulating valve, the coal feeding amount, and the water feeding amount; The second control parameter is the extraction steam throttle flow rate; The third control parameter is the condensate throttle flow rate.

4. The control method of the heating unit load according to claim 2, characterized in that The second control parameter is the extraction steam throttle flow rate, and the calculation method of the extraction steam throttle flow rate includes: Comparing the maximum load increment that the heat network can provide obtained according to the current operating state of the heat network, the load value of the extraction steam throttling system set by the operator, and the difference between the coordinated load instruction and the stable load instruction, and taking the minimum value of the three as the first load setting value of the extraction steam throttling system; Calculating the ratio of the first load setting value of the extraction steam throttling system to the work done by the unit extraction steam flow obtained by the equivalent heat drop method, and taking this ratio as the extraction steam throttle flow rate.

5. The control method of the heating unit load according to claim 2, characterized in that, The third control parameter is the condensate throttle flow rate, and the calculation method of the condensate throttle flow rate includes: Comparing the maximum load increment that can be provided under the deaerator water level limit, the load value of the condensate throttling system set by the operator, and the difference between the coordinated load instruction and the stable load instruction and the load setting value of the extraction steam throttling system, and taking the minimum value of the three as the second load setting value of the condensate throttle flow rate system; Calculating the ratio of the second load setting value of the condensate throttle flow rate system to the increase in unit power of the unit when the condensate flow rate changes obtained by the equivalent heat drop method, and taking this ratio as the condensate throttle flow rate.

6. A control device for the load of a heating unit, characterized in that, The device includes: A receiving module that receives a target load instruction and the actual load of the unit; The first processing module is used to perform the first speed limit link processing on the target load command to obtain a coordinated load command, including: comparing the maximum load change rate of the unit under the longest scheduling time limit acceptable to the power grid and the load change rate manually set by the operator, and taking the smaller value of the two as the first load change rate; calculating the coordinated load command according to the first load change rate, and its calculation method is as follows: Where, Pe1 is the coordinated load command, Pe00 is the initial load of the unit, Pe0 is the target load of the unit, Rate1 is the first load change rate, and t s1 is the unit adjustment time at the first load change rate; A first control parameter acquisition module, which is used to take the difference between the coordinated load instruction and the actual load of the unit to obtain a unit load deviation, and further obtain a first control parameter of the original coordinated control system of the boiler and turbine; The second processing module performs speed limit processing on the target load command and the coordinated load command to obtain a first load setting value for the extraction steam throttling system of the heat supply and a second load setting value for the condensate throttling system. The speed limit processing includes: second speed limit processing, third speed limit processing, and fourth speed limit processing. Among them, the second speed limit processing includes: comparing the maximum load change rate during stable operation of the unit parameters and the load change rate manually set by the operator, and taking the smaller value of the two as the second load change rate; calculating the stable load command of the unit according to the second load change rate, and its calculation method is as follows: where Pe2 is the stable load command of the unit, Rate2 is the second load change rate, and t s2 is the unit regulation time at the second load change rate; the third speed limit processing includes: comparing the maximum load increment that the heat network can provide obtained according to the current heat network operation state, the load value of the extraction steam throttling system set by the operator, and the difference between the coordinated load command and the stable load command, and taking the minimum value of the three as the first load setting value of the extraction steam throttling system; the fourth speed limit processing includes: comparing the maximum load increment that can be provided under the deaerator water level limit, the load value of the condensate throttling system set by the operator, and the difference between the coordinated load command and the sum of the stable load command and the load setting value of the extraction steam throttling system, and taking the minimum value of the three as the second load setting value of the condensate throttling system; The second control parameter acquisition module is configured to obtain a second control parameter of the extraction steam throttling control system and a third control parameter of the condensate throttling control system according to a first load set value of the extraction steam throttling system for heating and a second load set value of the condensate throttling system; The control module is configured to control the load of the heating unit based on the first control parameter, the second control parameter, and the third control parameter.

7. A computer device, characterized in that, Comprising: A memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to execute the method according to any one of claims 1-5.

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