汽包水位串级三冲量非线性PID控制系统  

Nonlinear PID-P cascade control for boiler drum level

作　　者：徐春梅 张浩[1,2] 杨平[1] 

机构地区：[1]上海电力学院电力与自动化工程学院,上海200090 [2]同济大学CIMS研究中心,上海200092

出　　处：《华东电力》2009年第5期838-841,共4页East China Electric Power

基　　金：上海高校选拔培养优秀青年教师科研专项基金支持项目(Z-2006-83)

摘　　要：针对锅炉汽包水位控制系统的特点,提出了基于非线性PID控制器(NLPID)的汽包水位三冲量串级控制方案。在串级控制中,内回路采用P控制以快速消除给水扰动,外回路采用非线性PID控制以保证汽包水位稳定在给定值,并有效克服蒸汽流量的扰动。该控制策略结构和算法简单,通过仿真结果验证,相对于常规串级PI-P控制方案,该控制方案具有良好控制品质和较强的鲁棒性,可有效克服蒸汽流量扰动和给水流量扰动,且在对象参数变化较大时仍能获得稳定的调节品质。A nonlinear PID-P cascade control strategy was presented for the drum level control system in power sta- tions. P control was used in the inner loop to quickly eliminate the disturbance of feed water quantity, and nonlinear PID controller （NLPID） was adopted in the outer loop to keep the drum level at the set point and overcome the dis- turbance of steam flux. The structure and algorithms of the control strategy, were very simple, and simulation proved it more superior to PI-P control. The strategy can not only overcome the disturbance of feed water quantity and stream effectively, but also has strong robustness and good regulating performance when parameters of the object vary.

关 键 词：非线性PID控制 跟踪微分器 汽包水位控制 串级控制 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]