Thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control

Abstract

The invention discloses a thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control. The control system comprises a load control loop, a main steam pressure control loop and a separator temperature control loop, load, main steam pressure and separator temperature as well as deviation of a set value are sent to a prediction controller based on a dynamic matrix control algorithm, optimization values of steam turbine regulating valve opening degree, coal feed and water feed flow are acquired by calculation, and tracking performance of a unit to load instructions and running safety performance of the unit are ensured. The optimization problem of a multi-variable system can be processed conveniently by adopting dynamic matrix control, and the calculation process is clear and simple; during engineering application, programming is convenient to implement; corresponding control quantity is adjusted timely by predicting future output deviation, actual generating power can quickly track the load instructions, stability of the main steam pressure and the separator temperature can be ensured, and the unit is high in stability. The control scheme has control effect better than that of conventional PID control.

Description

technical field [0001] The invention relates to the field of thermal power engineering and automatic control, in particular to a distributed coordinated control system for thermal power units based on multi-parameter dynamic matrix control. Background technique [0002] As the parameters of the unit continue to increase, the complexity of the controlled object and the control requirements have increased, and many problems will arise. In the coordinated control system of ultra-supercritical units, the disturbance of feedwater flow has a great influence on the actual power and main steam pressure of the units. Therefore, in addition to the amount of coal and the opening of the steam turbine valve as the controlled quantities of the coordinated control system, and the main steam pressure and actual power as the controlled quantities of the coordinated control system, the feedwater flow rate should be used as the controlled quantities in the coordinated system. As the controlle...

AI Technical Summary

Problems solved by technology

Aiming at the characteristics of many variables and complex structures of ultra-supercritical units, the present invention proposes a coordinated control method for thermal power units based on multivariable system dynamic matrix control

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