CN111352401A - Control method, device, equipment and medium for distributed control system - Google Patents
Control method, device, equipment and medium for distributed control system Download PDFInfo
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- 238000006477 desulfuration reaction Methods 0.000 claims description 8
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- 239000002002 slurry Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
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- G05B19/00—Programme-control systems
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- G05B19/4183—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by data acquisition, e.g. workpiece identification
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Abstract
The invention discloses a control method for a distributed control system, which comprises the following steps: acquiring historical operating data of the unit; establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data; according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter; and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit. Therefore, the method avoids the setting process of manual intervention control parameters, and greatly saves time resources and human resources; in addition, the accuracy of setting the control parameters is improved through the method and the device, and the requirements of operators are better met. In addition, the invention provides a control device, equipment and a storage medium for a distributed control system, which correspond to the method.
Description
Technical Field
The invention relates to the technical field of coal-fired power plant control, in particular to a control method, a control device, control equipment and a control medium for a distributed control system.
Background
The energy composition of China is mainly coal, and the current coal-fired power station occupies about 60 percent of all power generation scales. In a thermal power plant, the unit can be controlled according to factors such as required unit load, power grid frequency and the like so as to respond to relevant regulation requirements and ensure safe, stable and economic operation of the unit.
Generally, when the load of a unit is required to reach a certain value, a power plant control system sends a unit load instruction to a Distributed Control System (DCS) of the unit, a distributed control system of a boiler and a distributed control system of a steam turbine, and then a distributed control system of fuel to control the combustion of fuel coal to reach the load requirement. Because of the unavoidable time delay problem of the unit equipment, the adjusting mode inevitably causes the conditions of unit adjustment delay and overlarge adjusting amplitude, and can lead to the conditions of overlarge system adjusting amplitude and oscillation in the adjustment process in serious conditions, thus leading to the instability of unit parameters. The defects of the adjustment exist in main adjusting systems of the units, such as main steam pressure, main steam temperature, reheated steam temperature, oxygen quantity and other unit parameters.
In the prior art, in order to avoid the situation of the delay of the adjustment of the unit or the overshoot of the system caused by the delay of the unit equipment as much as possible, an operator usually considers the factor of the deviation through experience when setting the instruction of the system equipment, adaptively sets the control parameters, and artificially reduces the deviation between the automatic control instruction and the actual value so as to reduce the occurrence of the situation of the overshoot of the system caused by the delay of the unit equipment. However, the setting of the control parameters is performed in a manual intervention mode, the workload of operators is increased invisibly, a great deal of time and human resource waste is caused, and the operators need to pay attention to the working condition of the control system at any time and adjust the working condition in time to avoid the occurrence of the over-adjustment condition of the system; and moreover, the control parameter setting is carried out in a manual prediction mode, the situation of prediction error is easy to occur, the accuracy is low, and the requirement of unit operation cannot be better met.
Disclosure of Invention
The invention aims to provide a control method, a device, equipment and a medium for a distributed control system, which can determine a current control parameter corresponding to a target output through a corresponding relation between an actual output and a historical control parameter in historical operating data, and an automatic control unit operates according to the current control parameter, so that the setting process of manually intervening the control parameter is avoided, and time resources and human resources are greatly saved; moreover, the accuracy of setting the control parameters can be improved, and the requirements of operators can be better met.
In order to solve the above technical problem, the present invention provides a control method for a distributed control system, including:
acquiring historical operating data of the unit;
establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to the historical operating data;
according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter;
and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit.
Preferably, the actual output is in particular the unit load.
Preferably, the historical control parameters specifically include coal mill running state parameters, coal mill output force, coal mill output, secondary air box differential pressure, steam turbine vacuum value, air cooling fan parameters, pump running state parameters, desulfurization slurry pump running parameters, primary air pressure, separator superheat degree parameters and desuperheating water volume.
Preferably, the searching for the corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output according to the corresponding relationship specifically includes:
according to the corresponding relation, searching corresponding historical control parameters when the target conditions are consistent with the historical conditions and the actual output is the target output;
when the searched historical control parameters are multiple, calculating the total energy consumption generated by each historical control parameter;
determining the historical control parameter with the minimum total energy consumption as the target historical control parameter.
Preferably, the method further comprises the following steps:
and when the actual output quantity equal to the target output quantity is not found, generating feedback information for indicating that the current control parameter does not exist for prompting.
Preferably, the method further comprises the following steps:
updating the historical operating data according to the received updating instruction;
and according to the updated historical operating data, reestablishing the corresponding relation between the actual output and the historical control parameters under different historical conditions.
Preferably, the historical conditions are in particular ambient temperature conditions and/or coal type.
In order to solve the above technical problem, the present invention further provides a control device for a distributed control system, including:
the acquisition module is used for acquiring historical operating data of the unit;
the establishing module is used for establishing the corresponding relation between the actual output and the historical control parameters under different historical conditions according to the historical operating data;
the searching module is used for searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output according to the corresponding relation, and taking the target historical control parameter as the current control parameter;
and the sending module is used for generating a control instruction according to the current control parameter and sending the control instruction to a distributed control system of the unit.
In order to solve the above technical problem, the present invention further provides a control device for a distributed control system, including a memory for storing a computer program;
a processor for implementing the steps of the control method for a distributed control system as described in any one of the above when executing the computer program.
To solve the above technical problem, the present invention further provides a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the control method for a distributed control system according to any one of the above.
The invention provides a control method for a distributed control system, which comprises the following steps: acquiring historical operating data of the unit; establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data; according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter; and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit. Therefore, the current control parameter corresponding to the target output is determined according to the corresponding relation between the actual output and the historical control parameter in the historical operation data, the automatic control unit operates according to the current control parameter, the setting process of manual intervention control parameters is avoided, and time resources and human resources are greatly saved; in addition, the accuracy of setting the control parameters is improved through the method and the device, and the requirements of operators are better met.
In addition, the control device, the equipment and the storage medium for the distributed control system provided by the invention correspond to the method, and have the same beneficial effects.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of a control method for a distributed control system according to an embodiment of the present invention;
fig. 2 is a structural diagram of a control device for a distributed control system according to an embodiment of the present invention;
fig. 3 is a structural diagram of a control device for a distributed control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
The core of the invention is to provide a control method, a device, equipment and a medium for a distributed control system, which can determine the current control parameter corresponding to the target output through the corresponding relation between the actual output and the historical control parameter in the historical operating data, and automatically control the unit to operate according to the current control parameter, thereby avoiding the setting process of manually intervening the control parameter and greatly saving time resources and human resources; moreover, the accuracy of setting the control parameters can be improved, and the requirements of operators can be better met.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a flowchart of a control method for a distributed control system according to an embodiment of the present invention; as shown in fig. 1, a control method for a distributed control system according to an embodiment of the present invention includes steps S101 to S104:
step S101: acquiring historical operating data of the unit;
step S102: establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data;
in one embodiment, historical conditions influencing the operation of the unit are selected according to historical operation data of the unit, the actual output of the unit and corresponding historical control parameters under various historical conditions are counted, and the corresponding relation between the actual output and the historical control parameters under different historical conditions is established. When the actual output and the historical conditions are known, the historical control parameters input by the unit when the actual output is realized can be determined through the corresponding relation. Specifically, the historical conditions are specifically ambient temperature conditions and/or coal types. Namely, the corresponding relation between the actual output and the historical control parameters under different coal types and/or different environmental temperature conditions is established.
In specific implementation, because the actual output quantity change caused by the small historical control parameter change under different historical conditions is not obvious, the corresponding relation between different actual output quantity intervals and the historical control parameters under different historical conditions can be established. It should be noted that the range of the interval may be preset by a skilled person according to practical experience, and the embodiment of the present invention is not limited.
In one embodiment, the actual throughput is specified as the unit load produced by burning fuel coal. One skilled in the art may set other parameters as the actual output according to the actual application requirement, and the embodiment of the present invention is not limited.
In specific implementation, the historical control parameters specifically include coal mill running state parameters, coal mill output force, coal mill output, secondary air box differential pressure, steam turbine vacuum value, air cooling fan parameters, pump running state parameters, desulfurization slurry pump running parameters, primary air pressure, separator superheat degree parameters and desuperheating water volume.
Step S103: according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter;
step S104: and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit.
In one embodiment, the target historical control parameters corresponding to the target conditions that are consistent with the historical conditions and the actual output is the target output can be searched according to the established corresponding relationship. For example, the target condition is that the coal type is a type a coal type, and the target output amount to be completed at present is B. And searching for a corresponding target historical control parameter when the historical condition is the type A coal type and the actual output is the type B coal type according to the corresponding relation between the actual output and the historical control parameter under different historical conditions, and determining the target historical control parameter as a current control parameter capable of completing the currently required target output. It will be appreciated that the query may be made by using the target conditions and target throughput as index keys.
In one embodiment, according to the corresponding relationship, searching for a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output specifically includes:
according to the corresponding relation, searching corresponding historical control parameters when the target conditions are consistent with the historical conditions and the actual output is the target output;
when a plurality of historical control parameters are found, calculating the total energy consumption generated by each historical control parameter;
and determining the historical control parameter with the minimum generated total energy consumption as the target historical control parameter.
Specifically, the historical control parameters corresponding to the target conditions which are consistent with the historical conditions and the actual output quantity which is the target output quantity are searched, and when one historical control parameter is used, the only historical control parameter can be used as the target historical control parameter. When the historical control parameters are multiple, the total energy consumption generated by each historical control parameter can be calculated, and the historical control parameter with the minimum total energy consumption is determined as the target historical control parameter, so that the aims of meeting the set target output and meeting the minimum consumed energy consumption are fulfilled.
Specifically, the coal mill operating state parameter in the target historical control parameter may be determined as the coal mill operating state parameter currently needed to achieve the target output. The coal mill operating state parameter is used for specifying a coal mill participating in work. It will be appreciated that if the current actual conditions are not satisfactory for operation in accordance with the determined current coal mill operating condition parameters, such as a designated operating coal mill being in operation or being serviced, new coal mill operating condition parameters may be reassigned based on the actual coal inventory of the coal yard and the combustion characteristics of the boiler.
Specifically, the coal mill air output and the coal mill output in the target historical control parameter may be determined as the coal mill air output and the coal mill output force currently required to achieve the target output. And determining the secondary air box differential pressure in the target historical control parameters as the secondary air box differential pressure required by the current realization of the target output. And determining the steam turbine vacuum value in the target historical control parameter as the steam turbine vacuum value required for realizing the target output. And determining the running state parameter of the circulating pump in the target historical control parameter as the running state parameter of the circulating pump required for realizing the target output. The parameters of the running state of the running pump specifically comprise the running number of the running pump and the variable frequency of the running pump, and the vacuum value of the steam engine influences the parameters of the running state of the running pump.
Specifically, the air cooling fan parameters in the target historical control parameters are determined as the air cooling fan parameters required for achieving the target output currently. And determining the number and frequency of the working air cooling fans and the operation mode of the heat pump according to the determined air cooling fan parameters.
Specifically, the operation parameters of the desulfurization slurry pump in the target historical control parameters are determined as the operation parameters of the desulfurization slurry pump required for realizing the target output. The operation parameters of the desulfurization slurry pump specifically comprise the number and the frequency of the operation of the desulfurization slurry pump.
Specifically, the primary air pressure in the target historical control parameter is determined as the primary air pressure currently required to achieve the target output. And determining the separator superheat degree parameter in the target historical control parameter as the separator superheat degree parameter required by the current target output. The separator superheat parameter is specifically a set value of the separator superheat and directly acts on a distributed control system adjusting system of the boiler, so that the water-coal ratio is ensured to be in a reasonable range, and the temperature of main steam of the boiler is ensured to be stable. And determining the desuperheating water amount in the target historical control parameters as the desuperheating water amount required for realizing the target output at present, and directly controlling the corresponding desuperheating water gate through the desuperheating water amount.
In one embodiment, the control instruction is generated according to the current control parameter and sent to the distributed control system of the unit, and further, the distributed control system can be directly controlled or incrementally controlled according to different control modes in practical application. When the selected control mode is direct control, the control instruction directly comprises the current control parameter; when the selected control mode is increment control, the control instruction comprises the increment of each current control parameter. Therefore, the control of the output of each coal mill, the primary air quantity of the coal mill, the secondary air baffle, the running mode of the circulating pump, the air cooling fan, the running mode of the heat pump, the desulfurization slurry pump, the primary air pressure, the superheat degree of the separator, the primary desuperheating water of the superheater and the like is completed, and the task of the set target output is further completed.
The invention provides a control method for a distributed control system, which comprises the following steps: acquiring historical operating data of the unit; establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data; according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter; and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit. Therefore, the current control parameter corresponding to the target output is determined according to the corresponding relation between the actual output and the historical control parameter in the historical operation data, the automatic control unit operates according to the current control parameter, the setting process of manual intervention control parameters is avoided, and time resources and human resources are greatly saved; in addition, the accuracy of setting the control parameters is improved through the method and the device, and the requirements of operators are better met.
In an embodiment, a control method for a distributed control system provided in an embodiment of the present invention further includes:
when the actual output quantity equal to the target output quantity is not found, feedback information for indicating that the current control parameter does not exist is generated to prompt.
Specifically, when the actual output equal to the target output is found according to the created corresponding relationship, it indicates that the current control parameter required for completing the target output under the current situation cannot be determined from the historical operating data, and feedback information indicating that the current control parameter does not exist can be generated and fed back to the operator for prompting. Therefore, after receiving the feedback information, the operator can provide a solution according to the actual situation, for example, manually set the current control parameters according to experience. Thereby ensuring the normal operation of the unit. Meanwhile, the current control parameters can be added into historical operating data according to the current environmental conditions, the target output and the manually set current control parameters, so that the situation that the current control parameters corresponding to the target output cannot be found again later is avoided.
In an embodiment, a control method for a distributed control system provided in an embodiment of the present invention further includes:
updating historical operating data according to the received updating instruction;
and according to the updated historical operating data, reestablishing the corresponding relation between the actual output and the historical control parameters under different historical conditions.
Specifically, the historical operating data may be updated according to the received update instruction for updating the historical operating data. The update operation specifically includes an add operation or a delete operation. After receiving the update instruction, the corresponding relationship established before needs to be updated correspondingly, that is, the corresponding relationship between the actual output and the historical control parameters under different historical conditions is reestablished according to the updated historical operating data. By updating the historical operating data and the corresponding relation, the accuracy and timeliness of determining the current control parameters are improved, the flexibility of controlling the combustion of the fuel coal is also improved, and the requirements of operators can be better met.
The invention also provides a control device for the distributed control system and a corresponding embodiment of the control device for the distributed control system. It should be noted that the present invention describes the embodiments from two perspectives, one is based on the functional module, and the other is based on the hardware.
Fig. 2 is a structural diagram of a control device for a distributed control system according to an embodiment of the present invention; as shown in fig. 2, a control device for a distributed control system according to an embodiment of the present invention includes:
the acquisition module 10 is used for acquiring historical operating data of the unit;
the establishing module 11 is used for establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data;
the searching module 12 is configured to search, according to the corresponding relationship, a target historical control parameter corresponding to a case where the target condition is consistent with the historical condition and the actual output is the target output, and use the target historical control parameter as a current control parameter;
and the sending module 13 is configured to generate a control instruction according to the current control parameter, and send the control instruction to a distributed control system of the unit.
In one embodiment, the present invention provides a control apparatus for a distributed control system, further comprising:
and the generating module is used for generating feedback information for indicating that the current control parameter does not exist for prompting when the actual output quantity equal to the target output quantity is not found.
In one embodiment, the present invention provides a control apparatus for a distributed control system, further comprising:
the updating module is used for updating the historical operating data according to the received updating instruction; and according to the updated historical operating data, reestablishing the corresponding relation between the actual output and the historical control parameters under different historical conditions.
Since the embodiments of this section correspond to the embodiments of the method section, reference is made to the description of the embodiments of the method section for the embodiments of this section, and details are not repeated here.
The control device for the distributed control system provided by the invention is used for acquiring historical operating data of a unit; establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data; according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter; and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit. Therefore, the current control parameter corresponding to the target output is determined according to the corresponding relation between the actual output and the historical control parameter in the historical operation data, the automatic control unit operates according to the current control parameter, the setting process of manual intervention control parameters is avoided, and time resources and human resources are greatly saved; in addition, the accuracy of setting the control parameters is improved through the method and the device, and the requirements of operators are better met.
Fig. 3 is a structural diagram of a control device for a distributed control system according to an embodiment of the present invention. As shown in fig. 3, a control device for a distributed control system according to an embodiment of the present invention includes a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the control method for a distributed control system as described in any one of the above when executing a computer program.
The processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 21 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 21 may also include a main processor and a coprocessor, where the main processor is a processor for processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 21 may further include an AI (Artificial Intelligence) processor for processing a calculation operation related to machine learning.
The memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing the following computer program 201, wherein after being loaded and executed by the processor 21, the computer program can implement relevant steps in the control method for a distributed control system disclosed in any one of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202, data 203, and the like, and the storage manner may be a transient storage manner or a permanent storage manner. Operating system 202 may include, among others, Windows, Unix, Linux, and the like.
In some embodiments, the control device for a distributed control system may further include an input-output interface 22, a communication interface 23, a power supply 24, and a communication bus 25.
Those skilled in the art will appreciate that the configuration shown in FIG. 3 does not constitute a limitation of control devices for a distributed control system and may include more or fewer components than those shown.
Since the embodiments of this section correspond to the embodiments of the method section, reference is made to the description of the embodiments of the method section for the embodiments of this section, and details are not repeated here. In some embodiments of the invention, the processor and memory may be connected by a bus or other means.
The invention provides a control device for a distributed control system, which can realize the following method: acquiring historical operating data of the unit; establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to historical operating data; according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter; and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit. Therefore, the current control parameter corresponding to the target output is determined according to the corresponding relation between the actual output and the historical control parameter in the historical operation data, the automatic control unit operates according to the current control parameter, the setting process of manual intervention control parameters is avoided, and time resources and human resources are greatly saved; in addition, the accuracy of setting the control parameters is improved through the method and the device, and the requirements of operators are better met.
Finally, the invention also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps as set forth in the above-mentioned method embodiments.
It is to be understood that if the method in the above embodiments is implemented in the form of software functional units and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and performs all or part of the steps of the methods according to the embodiments of the present invention, or all or part of the technical solution. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The detailed description of the control method, device, equipment and medium for the distributed control system provided by the invention is provided above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A control method for a distributed control system, comprising:
acquiring historical operating data of the unit;
establishing a corresponding relation between actual output and historical control parameters under different historical conditions according to the historical operating data;
according to the corresponding relation, searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output, and taking the target historical control parameter as a current control parameter;
and generating a control instruction according to the current control parameter, and sending the control instruction to a distributed control system of the unit.
2. Control method for a distributed control system according to claim 1, characterized in that said actual production is in particular the unit load.
3. The control method for a distributed control system according to claim 1, wherein the historical control parameters specifically include coal mill operating state parameters, coal mill output power, coal mill output, secondary air box differential pressure, steam turbine vacuum value, air cooling fan parameters, pump running state parameters, desulfurization slurry pump operating parameters, primary air pressure, separator superheat parameters, and desuperheating water volume.
4. The control method for a distributed control system according to claim 1, wherein the searching for the corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output according to the correspondence specifically comprises:
according to the corresponding relation, searching corresponding historical control parameters when the target conditions are consistent with the historical conditions and the actual output is the target output;
when the searched historical control parameters are multiple, calculating the total energy consumption generated by each historical control parameter;
determining the historical control parameter with the minimum total energy consumption as the target historical control parameter.
5. The control method for a distributed control system according to claim 1, further comprising:
and when the actual output quantity equal to the target output quantity is not found, generating feedback information for indicating that the current control parameter does not exist for prompting.
6. The control method for a distributed control system according to claim 1, further comprising:
updating the historical operating data according to the received updating instruction;
and according to the updated historical operating data, reestablishing the corresponding relation between the actual output and the historical control parameters under different historical conditions.
7. Control method for a distributed control system according to claim 1, wherein said historical conditions are in particular ambient temperature conditions and/or coal type.
8. A control device for a distributed control system, comprising:
the acquisition module is used for acquiring historical operating data of the unit;
the establishing module is used for establishing the corresponding relation between the actual output and the historical control parameters under different historical conditions according to the historical operating data;
the searching module is used for searching a corresponding target historical control parameter when the target condition is consistent with the historical condition and the actual output is the target output according to the corresponding relation, and taking the target historical control parameter as the current control parameter;
and the sending module is used for generating a control instruction according to the current control parameter and sending the control instruction to a distributed control system of the unit.
9. A control device for a distributed control system, comprising a memory for storing a computer program;
a processor for implementing the steps of the control method for a distributed control system according to any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the control method for a distributed control system according to any one of claims 1 to 7.
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