基于自抗扰Smith预估补偿方法的超临界机组再热汽温控制研究

为了解决超临界火电机组再热汽温波动大、自动难于投入以及喷水量大造成经济性差的问题，将自抗扰（active disturbance rejection controller，ADRC）控制技术与Smith预估补偿控制有机融合，提出了一种适用于存在大滞后与非线性特性的先进再热汽温优化控制策略。对某600 MW超临界机组再热汽温对象进行仿真研究，结果表明：与传统再热汽温控制系统相比，所提出的先进再热汽温控制策略可以减小再热汽温的波动，设定值跟踪性能与抗扰动能力均得到较大改善，同时可以减小喷水量提高机组经济性。

Research on Reheated Steam Temperature Control of Supercritical Unit Based on Active Disturbance Rejection Controller Smith Predictive Compensation Method

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.