Active Disturbance Rejection Control of Thermal Power Unit Coordinated System based on Frequency Domain Analysis
Abstract: For the multi-input
and multi-output, strong-coupling nonlinear features of coordinated system for
thermal power unit, it is difficult for traditional PID coordinated control
scheme to meet the power grid demand which often participates in peak
regulation and frequency modulation. In this paper, Inverse Nyquist array is
employed to carry out frequency domain analysis of the plant model. Then Pseudo
diagonalization is used to design the static decoupling compensation matrix of
the system. Above on these, the linear active disturbance rejection controller
of every channel in coordinated system can be designed repectively. Dynamic
coupling and system unknown parts are observed by extended state observer of
ADRC and is compensated to the system in time. The simulation tests show that
the disturbance rejection results of the load and the main steam pressure for
the coordinated control system under LADRC is better than that of PID control.
Keywords: thermal
powerunitcoordinated system, linear active disturbance rejection controller, frequencydomain
analysis, extended state observer, pseudodiagonalization
Author: Ruiqing Zhang, Liangyu
Ma, Yongguang Ma, Yang Liang, Liwei Geng
Journal Code: jptkomputergg160220
