Method and device for controlling boiler and steam turbine in single machine unit based on data driving

Abstract

The invention discloses a method and device for controlling a boiler and a steam turbine in a single machine unit based on data driving. The method comprises the following five steps: establishing a nonlinear model of the single machine unit; adopting dynamic linearization technique to obtain a linear data model; estimating the pseudo-Jacobian matrix in the data model; designing data-based self-adaptation control algorithms; selecting the parameters of a controller and verifying the stability of the algorithm. The data driving based method and device for controlling the boiler and the steam turbine in the single machine unit do not rely on the model information of the single machine unit, the modeling problem of the single machine unit under complicated working conditions and running environments is thus avoided, at the same time, the unmodeled dynamics and other factors of the single machine unit thus have strong robustness. The algorithm is simple in design and easy to operate, and calculated amount is small. The technical scheme of the invention can be applied to controlled objects in the industrial process of other complex system models which are difficult to establish.

Description

technical field [0001] The invention relates to a data-driven unit boiler steam turbine control method and device, belonging to the technical field of electric power system and industrial process control. Background technique [0002] The power industry is the most important basic energy industry in the development of the national economy. During the "13th Five-Year Plan" period, my country's power demand will increase year by year. In order to meet the needs of national economic development and realize the sustainable development strategy of the power industry and the goal of energy conservation and emission reduction, it is of great significance to adopt advanced control technologies and methods to improve the operating efficiency of existing thermal power plant unit units. [0003] Thermal power plant generator sets generally use a boiler and a steam turbine unit unit, and the energy transfer and conversion in the entire production process is jointly undertaken by the boi...

AI Technical Summary

Problems solved by technology

Due to the influence of the above factors, it is almost impossible to measure all the operating parameters of the boiler steam turbine system. Even the same equipment and the same operating conditions will affect the system operation process due to the change of a certain operating parameter. Therefore, from the material, energy, etc. The mathematical model of the process established by the angle is inaccurate, and the controller designed based on the approximate model is difficult to achieve the desired control effect in practical applications

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