Research on Reheated Steam Temperature Control of Supercritical Unit Based on Active Disturbance Rejection Controller Smith Predictive Compensation Method
Xiaobo CUI,
Jiubin LIU,
Hongxia ZHU,
Xuanzhen ZHANG,
Hui GU,
Liang WANG
Affiliations
Xiaobo CUI
School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China
Jiubin LIU
School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China
Hongxia ZHU
School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China
Xuanzhen ZHANG
School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China
Hui GU
School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China
Liang WANG
School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China
In order to solve the problem of high reheated steam temperature fluctuation, difficult operation of automatic control and low economical efficiency because of high spraying water in supercritical unit, an advanced reheated steam temperature optimal control strategy being applicable to big lag and nonlinear characteristic was put forward by combining the active disturbance rejection controller (ADRC) with the Smith predictive compensation control. Through the simulation of the reheated steam temperature object in 600 MW supercritical unit, the results show that compared with the traditional reheated steam temperature control system, the proposed advanced reheated steam temperature control strategy can decrease the reheated steam temperature fluctuations, setpoint tracking performance and disturbance rejection can be improved, also the economical efficiency can be raised by reducing the amount of spraying water.
