CN116679555A - Control method and device for coal-fired power plant system operation - Google Patents

Abstract

The application relates to the technical field of variable load control, in particular to a control method and a device for the system operation of a coal-fired power plant. The method is suitable for adjusting the output power of the coal-fired power plant in a specific time period, and comprises the following steps: calculating the power adjustable range of high-delay auxiliary equipment in the coal-fired power plant; the high-delay auxiliary equipment is auxiliary equipment with the time for changing the operating power of the auxiliary equipment to influence other systems in the coal-fired power plant within a specific time period exceeding a preset time threshold; acquiring target output power of the coal-fired power plant; the operating power of the high-delay auxiliary equipment is adjusted within the power adjustable range to reduce or increase the output power of the coal-fired power plant to the target output power within a specific period of time. According to the method provided by the application, the operation power of the high-delay auxiliary equipment is changed so as to change the station power proportion, the output power of the power plant is changed under the condition that the generating power of the unit is unchanged, and the flexibility of load following of the coal-fired power station is improved.

Description

Coal-fired power station system operation control method and device

technical field

The present application relates to the technical field of variable load control, in particular to a control method for system operation of a coal-fired power station, a control device for system operation of a coal-fired power station, and a machine-readable storage medium.

Background technique

my country is scientifically and orderly promoting the realization of the "dual carbon" strategic goal and promoting the reform of energy structure. On the premise of ensuring the security of energy supply, we will continue to reduce the installed capacity of coal power, which accounts for more than 40% of the country's carbon emissions, vigorously develop renewable energy such as wind power and photovoltaics, and promote the coordinated development of various energy sources. Wind energy and solar energy have strong time-varying characteristics, which makes it difficult to accommodate renewable energy power generation. Therefore, coal-fired power plants need to perform frequent load changes to balance the supply and demand of the grid. However, the thermal system of coal-fired power plants is huge, and the delay caused by thermal inertia is significant, making it difficult to achieve the goal when rapid load changes are required.

Contents of the invention

The purpose of the embodiments of the present application is to provide a control method, device and storage medium for the operation of a coal-fired power station system.

In order to achieve the above purpose, the first aspect of the present application provides a control method for the operation of the coal-fired power station system, which is suitable for short-term adjustment of the output power of the coal-fired power station. The method includes: calculating the power of high-delay auxiliary equipment in the coal-fired power station. Adjustment range; wherein, the high-delay auxiliary equipment is an auxiliary equipment whose operating power has an impact on other systems in the coal-fired power station within a specific period of time exceeding the preset time threshold; obtain the target output of the coal-fired power station Power: Adjust the operating power of high-delay auxiliary equipment within the power adjustable range to reduce or increase the output power of the coal-fired power station to the target output power within a specific period of time.

Based on the first aspect, in some embodiments of the present application, before adjusting the operating power of the high-delay auxiliary equipment within the power adjustable range, the method further includes: obtaining the current output power of the coal-fired power station; calculating the target output power and the current output power The power difference; according to the positive or negative of the difference, it is judged that the operating power of the high-delay auxiliary equipment needs to be increased or decreased.

Based on the first aspect, in some embodiments of the present application, the high-delay auxiliary equipment includes: a first auxiliary equipment and a second auxiliary equipment; Before the power, the method also includes: determining the adjustment order of the operating power of the first auxiliary equipment and the second auxiliary equipment, specifically including: judging whether the time for the first auxiliary equipment to affect other systems is not less than that of the second auxiliary equipment ; If so, the operating power of the first auxiliary equipment is adjusted preferentially; otherwise, the operating power of the second auxiliary equipment is adjusted preferentially.

Based on the first aspect, in some embodiments of the present application, the calculating the adjustable power range of the high-delay auxiliary equipment includes: separately calculating the adjustable power ranges of the first auxiliary equipment and the second auxiliary equipment, specifically including : If the current operating power of the first auxiliary equipment is W ₁ , the upper limit of the operating power of the first auxiliary equipment is W _1,max , and the lower limit of the operating power of the first auxiliary equipment is W _1,min ; then the first auxiliary equipment The adjustable power increase of the equipment is: ΔP _in,1 = W ₁ -W _1,min ; the adjustable power reduction of the first auxiliary equipment is: ΔP _de,1 = W _1,max -W ₁ ; if The current operating power of the second auxiliary equipment is W ₂ , the upper limit of the operating power of the second auxiliary equipment is W _2,max , and the lower limit of the operating power of the second auxiliary equipment is W _2,min ; then the second auxiliary equipment's The adjustable power increase is: ΔP _in,2 =W ₂ -W _2,min ; then the adjustable power reduction of the second auxiliary equipment is: ΔP _de,2 =W _2,max -W ₂ .

Based on the first aspect, in some embodiments of the present application, if the target output power is P _e , the current output power is P ₀ ; according to the positive or negative of the difference, it is judged that the operating power of the high-delay auxiliary equipment needs to be increased or Decrease, including: if P _e -P ₀ >0, the operating power of the delayed auxiliary equipment needs to be reduced; if P _e -P ₀ <0, the operating power of the delayed auxiliary equipment needs to be increased.

Based on the first aspect, in some embodiments of the present application, if the first auxiliary device takes longer to affect other systems than the second auxiliary device; the adjustment of the high-delay auxiliary device within the power adjustable range Operating power, including: judging whether P _e -P ₀ satisfies ΔP _de,1 ≥P _e -P ₀ >0, if so, adjusting the operating power of the first auxiliary equipment to reduce P _e -P ₀ ; judging P _e -P Whether ₀ satisfies -ΔP _in,1 ≤P _e -P ₀ <0, if so, adjust the operating power of the first auxiliary equipment to increase P ₀ -P _e ; judge whether P _e -P ₀ satisfies (ΔP _de,1 +ΔP _de,2 )≥(P _e -P ₀ )>ΔP _de,1 , if so, first adjust the operating power of the first auxiliary equipment to reduce ΔP _de,1 , and then adjust the second auxiliary equipment to reduce (P _e -P ₀ )-ΔP _de,1 ; determine whether P _e -P ₀ satisfies -(ΔP _in,1 +ΔP _in,2 )≤(P _e -P ₀ )＜ΔP _in,1 , if so, first adjust the first The operating power of the first auxiliary equipment is increased by ΔP _in,1 , and then the second auxiliary equipment is adjusted to increase by (P ₀ -P _e )-ΔP _in,1 .

Based on the first aspect, in some embodiments of the present application, if the first auxiliary equipment is a coal mill and the second auxiliary equipment is a condenser circulating water pump, then the operating power of the coal mill is adjusted preferentially.

Based on the first aspect, in some embodiments of the present application, the high-delay auxiliary equipment further includes: a condenser fan in an indirect air-cooling system, and the operating power of the condenser fan is preferentially adjusted.

In the second aspect, the present application provides a control device for the operation of the coal-fired power station system, which is suitable for short-term adjustment of the output power of the coal-fired power station. The device includes: a calculation module for calculating the power of high-delay auxiliary equipment in the coal-fired power station Adjustable range; wherein, the high-delay auxiliary equipment is an auxiliary equipment whose operating power has an impact on other systems in a coal-fired power station within a specific period of time exceeding a preset time threshold; the acquisition module is used to acquire The target output power of the coal-fired power station; the adjustment module is used to adjust the operating power of high-delay auxiliary equipment within the power adjustable range, so as to reduce or increase the output power of the coal-fired power station to the target output power within a specific period of time .

In a third aspect, the present application provides a machine-readable storage medium, where instructions are stored on the machine-readable storage medium, and when the instructions are executed by a processor, the processor is configured to perform the above-mentioned operation of the coal-fired power plant system control method.

The method provided by this application changes the power consumption ratio of the plant by changing the power consumption of high-delay equipment such as boiler coal mills and condenser circulating water pumps, and changes the output power when the generator power of the unit remains unchanged. This method can be used very quickly. Quickly enable the coal-fired power station to quickly complete the variable power output target of the coal-fired power station, improve the load following rate, and use the time difference of each auxiliary equipment to affect the thermal system, effectively reducing the impact of the variable load process on the thermal system .

Other features and advantages of the embodiments of the present application will be described in detail in the following detailed description.

Description of drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the description, and are used together with the following specific implementation methods to explain the embodiments of the present application, but do not constitute limitations to the embodiments of the present application. In the attached picture:

FIG. 1 schematically shows a schematic flowchart of a control method for the operation of a coal-fired power station system according to an embodiment of the present application;

Fig. 2 schematically shows an internal structural diagram of a computer device according to an embodiment of the present application.

Explanation of reference signs

102-terminal; 104-server; A01-processor; A02-network interface; A03-internal memory; A04-display screen; A05-input device; A06-non-volatile storage medium; B01-operating system; B02-computer program.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the The specific implementation manners described are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, etc.) in the embodiment of the present application, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). ) under the relative positional relationship, movement conditions, etc. between the various components, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be interpreted as indications or hints Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present application.

Example 1

The thermal system of coal-fired power station has complex equipment, huge capacity, and obvious thermal inertia. When the power grid issues a load change command, it is difficult for the coal-fired power station to respond quickly due to the strong delay. For short-term and fast load-changing commands, power plants often need to complete within tens of seconds, while coal-fired power plant equipment cannot operate within a specific period of time. On the other hand, the power consumption rate of coal-fired power stations can reach 3% to 5%, which has a considerable potential for variable loads. Changing the power consumption of auxiliary equipment to change the output power of the whole site, and making corrections through other measures before the operation changes of auxiliary equipment affect the thermal system, is a feasible load conversion method for coal-fired power stations. For this reason, this embodiment proposes a control method for the operation of a coal-fired power station system, which is suitable for short-term regulation of the output power of a coal-fired power station, and the method includes:

S1. Calculate the power adjustable range of the high-delay auxiliary equipment in the coal-fired power station; wherein, the high-delay auxiliary equipment changes its operating power within a specific period of time to affect other systems in the coal-fired power station for more than the preset time Auxiliary equipment for time thresholds;

Specifically, the other systems here mainly refer to the thermal system of the coal-fired power station in this embodiment, and the specific period of time refers to a short period of time, such as tens of seconds to one minute or within one minute.

Further, to calculate the power adjustable range of the high-delay auxiliary equipment, it is first necessary to determine the specific high-delay auxiliary equipment. If there is more than one (or one type) of high-delay auxiliary equipment, its adjustment sequence and total power adjustable range should be further determined. Exemplarily, if the high-delay auxiliary equipment includes the first auxiliary equipment and the second auxiliary equipment; then:

1) Determine the adjustment sequence, specifically including:

It is judged whether the time for the first auxiliary equipment to affect other systems is not less than that of the second auxiliary equipment; if so, the operating power of the first auxiliary equipment is preferentially adjusted; otherwise, the operating power of the second auxiliary equipment is preferentially adjusted. For example, the first auxiliary equipment is a coal mill, and the second auxiliary equipment is a condenser circulating water pump. Since the coal mill system has a longer effect on the thermal system than the circulating water pump, it is necessary to change the output of the coal-fired power station When selecting the power, first choose to adjust the power of the pulverizer.

2) Calculate the power adjustable range, including:

Calculate the power adjustable ranges of the first auxiliary equipment and the second auxiliary equipment respectively, specifically including:

If the current operating power of the first auxiliary equipment is W ₁ (MW), the upper limit of the operating power of the first auxiliary equipment is W _1,max (MW), and the lower limit of the operating power of the first auxiliary equipment is W _1,min ( MW);

Then the adjustable power increase of the first auxiliary equipment is: ΔP _in,1 = W ₁ -W _1,min ;

Then the adjustable amount of power reduction of the first auxiliary equipment is: ΔP _de,1 =W _1,max -W ₁ ;

If the current operating power of the second auxiliary equipment is W ₂ (MW), the upper limit of the operating power of the second auxiliary equipment is W _2,max (MW), and the lower limit of the operating power of the second auxiliary equipment is W _2,min ( MW);

Then the adjustable power increase of the second auxiliary equipment is: ΔP _in,2 = W ₂ -W _2,min ;

Then the adjustable power reduction of the second auxiliary equipment is: ΔP _de,2 = W _2,max -W ₂ ;

In summary, the total power adjustable range of high-delay auxiliary equipment is:

The adjustable power rise of high-delay auxiliary equipment is: ΔP _in,1 = W ₁ +W ₂ -W _1,min -W _2,min ;

The adjustable power increase of the high-delay auxiliary equipment is: ΔP _in,1 =W _1,max +W _2,max -W ₁ -W ₂ .

S2. Obtain the target output power of the coal-fired power station;

Specifically, it is also necessary to clarify the current output power. By calculating the difference between the target output power and the current output power, it can be judged whether the operating power of the high-delay auxiliary equipment needs to be increased or decreased according to the positive or negative of the difference; Determine the size of the operating power that needs to be adjusted for high-latency auxiliary equipment.

1) Judging whether the operating power of high-delay auxiliary equipment needs to be increased or decreased according to the positive or negative value of the difference, the details are as follows:

If the target output power is P _e (MW) and the current output power is P ₀ (MW), then:

If P _e -P ₀ >0, it is necessary to reduce the operating power of the delayed auxiliary equipment;

If P _e -P ₀ <0, it is necessary to increase the operating power of the delay auxiliary equipment.

S3. Adjust the operating power of the high-delay auxiliary equipment within the power adjustable range, so as to reduce or increase the output power of the coal-fired power station to the target output power within a specific period of time;

Combined with the above S2-S3, the specific steps for adjusting high-latency auxiliary equipment are as follows:

Judging whether P _e -P ₀ satisfies ΔP _de,1 ≥P _e -P ₀ >0, if so, adjusting the operating power of the first auxiliary equipment to reduce P _e -P ₀ ;

Judging whether P _e -P ₀ satisfies -ΔP _in,1 ≤P _e -P ₀ <0, if so, adjust the operating power of the first auxiliary equipment to increase P ₀ -P _e ;

Judging whether P _e -P ₀ satisfies (ΔP _de,1 +ΔP _de,2 )≥(P _e -P ₀ )>ΔP _de,1 , if so, first adjust the operating power of the first auxiliary equipment to reduce ΔP _{de, 1} , then adjust the second auxiliary equipment to reduce (P _e -P ₀ )-ΔP _de,1 ;

Judging whether P _e -P ₀ satisfies -(ΔP _in,1 +ΔP _in,2 )≤(P _e -P ₀ )<-ΔP _in,1 , if so, first adjust the operating power of the first auxiliary equipment to increase ΔP _in,1 , then adjust the second auxiliary equipment to increase (P ₀ -P _e )-ΔP _in,1 .

If P _e -P ₀ is not within the above range, it means that the variable power output demand cannot be realized by adjusting the power consumption of the above auxiliary equipment. At this time, consider starting the machine furnace coordination control system, such as changing the water supply and coal supply. Change the way of boiler output to achieve variable power output requirements.

In addition, when the load changing process is completed, the power of the coal mill system and circulating water pump needs to be restored to the original steady-state operating conditions, and the main steam regulating valve needs to be used to adjust the power at this time.

Example 2

If the condenser of the coal-fired unit is indirect air-cooled, since the time delay required for the cooling air volume to affect the thermal system is the longest (compared to the coal mill and condenser circulating water pump in Example 1), the priority is given to The operating power of the condenser fan is adjusted. The current operating power of the condenser fan is W ₃ (MW), the upper limit of the operating power of the condenser fan is W _3,max (MW), and the lower limit of the operating power of the first auxiliary equipment is W _3,min (MW);

Then the adjustable power rise of the condenser fan is: ΔP _in,3 = W ₃ -W _3,min ;

Then the adjustable power reduction of the condenser fan is: ΔP _de,3 = W _3,max -W ₃ ;

When the target load P _e (MW) and the current power P ₀ (MW) satisfy -ΔP _de,3 ≤P _e -P ₀ ≤ΔP _in,3 , there is no need to adjust the coal mill and circulating water pump power, only the condenser The fan can complete the variable load demand; if P _e -P ₀ <-ΔP _de,3 , adjust the power of the condenser fan to the maximum, and then increase the power of the coal mill and circulating water pump; if P _e -P ₀ >ΔP _in,3 , adjust the power of the condenser fan to the minimum, and then reduce the power of the coal mill and circulating water pump.

After the load changing process is completed, the auxiliary equipment needs to be restored to the steady-state setting working conditions in order, followed by the coal mill and the circulating water pump. If the unit uses an indirect air-cooled condenser, restore the condenser fan to the steady-state condition after the circulating water pump returns to the steady-state condition.

Example 3

This embodiment provides a control device for the operation of the coal-fired power station system, which is suitable for adjusting the output power of the coal-fired power station within a specific period of time. The device includes: a calculation module for calculating the power of high-delay auxiliary equipment in the coal-fired power station Adjustable range; wherein, the high-delay auxiliary equipment is an auxiliary equipment whose operating power has an impact on other systems in a coal-fired power station within a specific period of time exceeding a preset time threshold; the acquisition module is used to acquire The target output power of the coal-fired power station; the adjustment module is used to adjust the operating power of high-delay auxiliary equipment within the power adjustable range, so as to reduce or increase the output power of the coal-fired power station to the target output power within a specific period of time .

The control device for the operation of the coal-fired power plant system includes a processor and a memory. The above-mentioned modules are all stored in the memory as program units, and the processor executes the above-mentioned program modules stored in the memory to realize corresponding functions.

The processor includes a kernel, and the kernel fetches corresponding program units from the memory. One or more cores can be set, and the control method for the operation of the coal-fired power plant system can be realized by adjusting the core parameters.

Memory may include non-permanent memory in computer-readable media, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one memory chip.

An embodiment of the present application provides a storage medium on which a program is stored, and when the program is executed by a processor, the above method for controlling the operation of the coal-fired power station system is implemented.

In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure may be as shown in FIG. 2 . The computer equipment includes a processor A01 connected through a system bus, a network interface A02, a display screen A04, an input device A05 and a memory (not shown in the figure). Wherein, the processor A01 of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes an internal memory A03 and a non-volatile storage medium A06. The nonvolatile storage medium A06 stores an operating system B01 and a computer program B02. The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A06. The network interface A02 of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor A01, a method for controlling the operation of the coal-fired power station system is realized. The display screen A04 of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device A05 of the computer equipment can be a touch layer covered on the display screen, or a button, a trackball or a touch screen provided on the casing of the computer equipment. The control board can also be an external keyboard, touch pad or mouse.

Those skilled in the art can understand that the structure shown in Figure 2 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation to the computer equipment on which the solution of the application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

In a typical configuration, a computing device includes one or more processors (CPUs), input/

Output interface, network interface and memory.

Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and/or nonvolatile memory such as read only memory (ROM) or flash RAM. The memory is an example of a computer readable medium.

Computer-readable media includes both volatile and non-volatile, removable and non-removable media, and can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media excludes transitory computer-readable media, such as modulated data signals and carrier waves.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes Other elements not expressly listed, or elements inherent in the process, method, commodity, or apparatus are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

The above are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (10)

1. A method for controlling operation of a coal-fired power plant system, adapted to regulate the output power of a coal-fired power plant during a specified time period, the method comprising:

calculating the power adjustable range of high-delay auxiliary equipment in the coal-fired power plant; the high-delay auxiliary equipment is auxiliary equipment with the time for changing the operating power of the auxiliary equipment to influence other systems in the coal-fired power plant within a specific time period exceeding a preset time threshold;

acquiring target output power of the coal-fired power plant;

the operating power of the high-delay auxiliary equipment is adjusted within the power adjustable range to reduce or increase the output power of the coal-fired power plant to the target output power within a specific period of time.

2. The method for controlling the operation of a coal-fired power plant system according to claim 1, wherein before adjusting the operation power of the high-delay auxiliary equipment within the power adjustable range, the method further comprises:

acquiring the current output power of the coal-fired power plant;

calculating the difference between the target output power and the current output power;

and judging whether the operating power of the high-delay auxiliary equipment needs to be increased or decreased according to the difference value.

3. The control method for the operation of the coal-fired power plant system according to claim 2, wherein the high-delay auxiliary equipment comprises: a first auxiliary device and a second auxiliary device; before the adjusting the operation power of the high-delay auxiliary equipment in the power adjustable range, the method further comprises:

determining an order of adjustment of the operating powers of the first auxiliary device and the second auxiliary device, comprising:

judging whether the time of the first auxiliary equipment affecting other systems is smaller than that of the second auxiliary equipment or not;

if not, preferentially adjusting the operation power of the first auxiliary equipment; if yes, the operation power of the second auxiliary equipment is preferentially adjusted.

4. A control method of coal-fired power plant system operation according to claim 3, characterized in that the calculating of the power adjustable range of the high-delay auxiliary equipment comprises:

calculating power adjustable ranges of the first auxiliary equipment and the second auxiliary equipment respectively specifically comprises the following steps:

if the current operating power of the first auxiliary equipment is W ₁ The upper limit of the operation power of the first auxiliary equipment is W _1,max The lower limit of the operation power of the first auxiliary equipment is W _1,min The power-up adjustable amount of the first auxiliary equipment is: ΔP _in,1 ＝W ₁ -W _1,min The power reduction adjustable quantity of the first auxiliary equipment is as follows: ΔP _de,1 ＝W _1,max -W ₁ ；

If the current operating power of the second auxiliary equipment is W ₂ The upper limit of the operating power of the second auxiliary equipment is W _2,max The lower limit of the operating power of the second auxiliary equipment is W _2,min The power-up adjustable amount of the second auxiliary equipment is: ΔP _in,2 ＝W ₂ -W _2,min The power-down adjustable amount of the second auxiliary equipment is as follows: ΔP _de,2 ＝W _2,max -W ₂ 。

5. The combustion of claim 4The control method for the operation of the coal power station system is characterized in that if the target output power is P _e The current output power is P ₀ Judging whether the operating power of the high-delay auxiliary equipment needs to be increased or decreased according to the difference value, wherein the method comprises the following steps of:

if P _e -P ₀ If the power is more than 0, determining that the operation power of the high-delay auxiliary equipment needs to be reduced;

if P _e -P ₀ And < 0, determining that the operating power of the high-delay auxiliary equipment needs to be increased.

6. The method for controlling operation of a coal-fired power plant system according to claim 5, wherein adjusting the operation power of the high-delay auxiliary equipment within the power adjustable range if the time during which the first auxiliary equipment affects other systems is longer than the second auxiliary equipment, comprises:

judging P _e -P ₀ Whether or not to meet DeltaP _de,1 ≥P _e -P ₀ > 0, if so, adjusting the operating power of the first auxiliary equipment to reduce P _e -P ₀ ；

Judging P _e -P ₀ Whether or not to satisfy-DeltaP _in,1 ≤P _e -P ₀ < 0, if so, regulating the operating power of the first auxiliary equipment to increase by P ₀ -P _e ；

Judging P _e -P ₀ Whether or not (DeltaP) _de,1 +ΔP _de,2 )≥(P _e -P ₀ )＞ΔP _de,1 If yes, adjusting the operation power of the first auxiliary equipment to reduce delta P _de,1 Readjusting the second auxiliary equipment lowering (P _e -P ₀ )-ΔP _de,1 ；

Judging P _e -P ₀ Whether or not to satisfy- (delta P) _in,1 +ΔP _in,2 )≤(P _e -P ₀ )＜-ΔP _in,1 If yes, adjusting the operation power of the first auxiliary equipment to increase by delta P _in,1 Readjusting the second auxiliary equipment elevation (P ₀ -P _e )-ΔP _in,1 。

7. The method for controlling the operation of a coal-fired power plant system according to claim 2, wherein if the first auxiliary equipment is a coal mill and the second auxiliary equipment is a condenser circulating water pump, the operation power of the coal mill is preferentially adjusted.

8. The method according to claim 7, wherein if the high-delay auxiliary equipment includes a condenser fan in an indirect air cooling system, the operation power of the condenser fan is preferentially adjusted.

9. A control device for operation of a coal-fired power plant system adapted to regulate the output power of a coal-fired power plant during a specified time period, the device comprising:

the calculation module is used for calculating the power adjustable range of the high-delay auxiliary equipment in the coal-fired power plant; the high-delay auxiliary equipment is auxiliary equipment with the time for changing the operating power of the auxiliary equipment to influence other systems in the coal-fired power plant within a specific time period exceeding a preset time threshold;

the acquisition module is used for acquiring target output power of the coal-fired power station;

and the adjusting module is used for adjusting the operating power of the high-delay auxiliary equipment in the power adjustable range so as to reduce or increase the output power of the coal-fired power plant to the target output power in a specific time period.

10. A machine-readable storage medium having instructions stored thereon, which when executed by a processor cause the processor to be configured to perform the method of controlling operation of a coal-fired power plant system according to any of claims 1 to 8.