CN112764368A - Configurable closed-loop control system for coal-electric unit of thermal power plant - Google Patents
Configurable closed-loop control system for coal-electric unit of thermal power plant Download PDFInfo
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- CN112764368A CN112764368A CN202011464700.8A CN202011464700A CN112764368A CN 112764368 A CN112764368 A CN 112764368A CN 202011464700 A CN202011464700 A CN 202011464700A CN 112764368 A CN112764368 A CN 112764368A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to a configurable closed-loop control system for a coal-electric unit of a thermal power plant, which comprises: the data acquisition server is used for acquiring production process data and reading high-speed real-time data in a configurable cache area and designated address mode; the model server is used for subscribing process data required by model calculation and storing a calculation result into a database; and the write-back server is used for writing different calculation result data in the database into corresponding controllers through configuration and a communication card matched with the controllers so as to control different field devices. The invention realizes the configurability of the fixed period of the data, the configurability of the data selection, the configurability of the data communication mode, the fixed address addressing and acquisition of the closed-loop control data, the real-time high-speed write-back of the optimized data, the high-efficiency execution of the closed-loop optimization control system of the coal-electric set, and the data and platform guarantee for improving the control quality of the closed-loop control system.
Description
Technical Field
The invention belongs to the technical field of thermal power generation, and particularly relates to a configurable closed-loop control system for a coal-electric unit of a thermal power plant.
Background
At present, a thermal power plant enters a saturation period, the internal optimization of the operation of the thermal power plant is taken as a main part, a coal-electricity unit is the main part of thermal power generation, a large number of process links capable of being optimized exist in the working procedure of the coal-electricity unit, but because the self calculation performance of an automatic control system is poor, the optimization control cannot be realized based on the current automatic control system, in order to solve the optimization problem, the coal-electricity unit can realize closed-loop optimization control by adding a model server, new optimization control requirements can continuously appear along with the continuous increase of the process optimization requirements, and the traditional method for realizing the closed-loop optimization control of a single process point by adding a single model server cannot meet the continuous process improvement requirements.
Disclosure of Invention
The invention aims to provide a configurable closed-loop control system for a coal-electric unit of a thermal power plant, which solves the problem that a set of independent closed-loop control system needs to be added when an optimal control model is deployed, and realizes one-time acquisition and application of industrial real-time data. Independent control models can be continuously and abundantly loaded on the system, and the bottleneck problem of a traditional single model server closed-loop control system is fundamentally solved.
The invention provides a configurable closed-loop control system for a coal-electric unit of a thermal power plant, which comprises the following components:
the data acquisition server is used for acquiring production process data and reading high-speed real-time data in a configurable cache area and designated address mode;
the model server is used for subscribing process data required by model calculation, selecting an algorithm module suitable for a field system for optimized calculation through configuring the algorithm module, and storing a calculation result into a database;
and the write-back server is used for writing different calculation result data in the database into corresponding controllers through configuration and a communication card matched with the controllers so as to control different field devices.
Further, after the data acquisition server acquires the data, the data are stored in a system cache according to the number and are continuously refreshed, so that the model server subscribes the required data points through the number of each data point.
Further, the model server obtains the latest data point value in the system cache according to a fixed period for model calculation to obtain a calculation result, and writes the calculation result into the corresponding database preset table as required, so that the write-back server writes the calculation result value of the model in the database preset table into the corresponding controller according to the configuration.
By means of the scheme, the configurable fixed period of data, the configurable data selection, the configurable data communication mode, the fixed address addressing acquisition of closed-loop control data and the real-time high-speed write-back of optimized data are realized through the configurable closed-loop control system of the coal-electric unit of the thermal power plant, the high-efficiency execution of the closed-loop optimization control system of the coal-electric unit is realized, and data and platform guarantee is provided for improving the control quality of the closed-loop control system.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Drawings
FIG. 1 is a schematic structural diagram of a configurable closed-loop control system for a coal-electric power plant unit of a thermal power plant;
FIG. 2 is a data flow diagram in accordance with an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a configurable closed-loop control system (configurable data acquisition and application system) for a coal-electric power plant unit of a thermal power plant, including:
the data acquisition server is used for acquiring production process data by adopting a configurable communication protocol mode and an OPC protocol, and reading high-speed real-time data by adopting a configurable cache area and a designated address mode;
the model server is used for subscribing process data required by model calculation, can configure an algorithm module, selects the algorithm module suitable for a field system to perform optimization calculation, and stores the calculation result into a database;
and the write-back server is used for writing different calculation result data in the database into corresponding controllers through a communication card (the communication card is arranged in the control system and keeps communication with the write-back server through configuring communication card parameters) matched with the controllers so as to control different field devices.
The servers are divided into three types from the functional dimension, and the number of the servers can be practically configured to be 1 to more than one to form a closed-loop control system platform.
In this embodiment, after the data is collected by the data collection server, the data is stored in the system cache according to the number and is continuously refreshed, so that the model server subscribes the required data point through the number of each data point.
In this embodiment, the model server obtains the latest data point value in the system cache according to a fixed period for model calculation to obtain a calculation result, and writes the calculation result into the corresponding database reservation table as needed, so that the write-back server writes the calculation result value of the model in the database reservation table into the corresponding controller according to the configuration.
Referring to fig. 2, an existing control system (DCS/PLC, etc.) can configure and select a communication method most suitable for requirements, such as OPC/Modbus/profibus/TCP/UDP, etc., through a configuration function of a closed-loop control system, to implement flexible configuration of the communication method, the existing industrial optimization control system does not have such a flexible configuration function, data acquisition also implements on-line data configuration adding, modifying, and deleting functions through a flexible configuration method, the acquired real-time data needs to use the latest data in real time because of requirements of optimization and closed-loop control, i.e. the latest real-time data, according to requirements of the closed-loop system, the embodiment employs a configurable data buffer, and employs an address-specified method for the required data of the real-time closed-loop control to implement high-speed real-time data reading, so as to meet industrial requirements of the real-time closed-loop control, meanwhile, the storage of historical data is added after caching, the real-time data acquisition in the embodiment adopts a special configurable fixed address caching technology and a historical data time-sharing processing mode, so that the time of applying the real-time data to a closed-loop optimization control system is greatly reduced, the data application is more reasonable, the requirement of an industrial control field is completely met, the direct write-back of the optimization result of the control system is realized, the configurable communication protocol selection is realized for various control systems such as DCS (distributed control system), PLC (programmable logic controller) and the like in the coal-electric machine set, the data write-back is directly performed, and the execution efficiency of the whole closed-loop control system is improved.
The method realizes the configurability of the fixed period of the data, the configurability of the data selection, the configurability of the data communication mode, the fixed address addressing and acquisition of the closed-loop control data, the real-time high-speed write-back of the optimized data, the high-efficiency execution of the closed-loop optimization control system of the coal-electric unit, and the data and platform guarantee for improving the control quality of the closed-loop control system.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A configurable closed-loop control system for a coal-electric unit of a thermal power plant, comprising:
the data acquisition server is used for acquiring production process data and reading high-speed real-time data in a configurable cache area and designated address mode;
the model server is used for subscribing process data required by model calculation, selecting an algorithm module suitable for a field system for optimized calculation through configuring the algorithm module, and storing a calculation result into a database;
and the write-back server is used for writing different calculation result data in the database into corresponding controllers through configuration and a communication card matched with the controllers so as to control different field devices.
2. The configurable closed-loop control system for the coal-electric unit of the thermal power plant as claimed in claim 1, wherein after the data is collected by the data collection server, the data is stored in the system cache according to the number and is continuously refreshed, so that the model server can subscribe to the required data points according to the number of each data point.
3. The configurable closed-loop control system for the coal-electric unit of the thermal power plant as claimed in claim 2, wherein the model server obtains values of latest data points in the system cache according to a fixed period, the values are used for model calculation to obtain calculation results, the calculation results are written into the corresponding database reservation table according to requirements, and the calculation result values of the models in the database reservation table are written into the corresponding controller by the write-back server according to configuration.
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| CN108108843A (en) * | 2017-12-22 | 2018-06-01 | 冶金自动化研究设计院 | A kind of industrial data optimization system iterated to calculate online based on label data |
| CN108388223A (en) * | 2018-04-03 | 2018-08-10 | 深圳市同富信息技术有限公司 | It is a kind of to be used for apparatus control system of the wisdom factory based on data closed loop |
| JP2019204462A (en) * | 2018-05-25 | 2019-11-28 | 三菱日立パワーシステムズ株式会社 | Data processing system, data processing method and program |
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Patent Citations (7)
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| CN101187813A (en) * | 2007-12-07 | 2008-05-28 | 冶金自动化研究设计院 | Integrative data source based automatic optimization scheduling system and method for steel, iron and energy source |
| CN103984316A (en) * | 2014-05-16 | 2014-08-13 | 刘玮 | Energy management device and system |
| CN104615114A (en) * | 2015-01-27 | 2015-05-13 | 华北电力大学 | Furnace desulphurization optimization control method for circulating fluidized bed |
| CN107679717A (en) * | 2017-09-15 | 2018-02-09 | 西安博兴自动化科技有限公司 | A kind of management system based on water amount information collection and Group of Pumping Station Optimized Operation |
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