Research On ADRC Parameter Optimization And Its Application Simulation

Due to the increasing demand for electricity and the vigorous development of renewable energy in the electricity market,in order to make the production of power plants safer and more efficient,the task of improving the control effect of power plants is more and more urgent.At present,the most widely used controller in the power plant is PID controller,and the thermal power unit has the characteristics of large inertia and large delay.As long as the unit participates in deep peak shaving and large-scale load change,PID parameters must be re optimized and revised.If the parameter setting is not appropriate,the control effect will be greatly reduced,which can be realized in the industrial control with complex working conditions It is time-consuming and not easy to adjust the PID parameters online.In recent years,there are many advanced control technologies,such as auto disturbance rejection control technology,adaptive control technology,et al,which are more and more widely used in power plants.In this paper,the mechanism models of single tank level system and double tank level system are established.PSO and BAS algorithm are used to optimize the parameters of the linear ADRC applied to the tank level control system.The influence of each parameter on the control performance of the linear ADRC is studied,and the regulation of the parameter adjustment of the controller is analyzed.By analyzing the characteristics of the superheated steam temperature of the thermal power unit,the cascade LADRC＿PI control scheme of the superheated steam temperature system is established.The main circuit uses LADRC controller,the secondary circuit uses PI controller,and the relevant control program is written with MATLAB.The LADRC＿PI control scheme is applied to the 600 MW supercritical unit simulator in the simulation laboratory of North China Electric Power University.The experimental results show that the response speed of LADRC＿PI control scheme to the disturbance is faster than the original control scheme of the simulation unit,the overshoot of the superheated steam temperature is smaller,the steady-state deviation of the superheated steam temperature is smaller,the control effect of the superheated steam temperature is improved,and the effectiveness of LADRC＿PI control scheme is verified.