【作者】 王利杰；

【导师】 吕丽霞； 高志存；

【作者基本信息】 华北电力大学（河北） ， 控制理论与控制工程， 2008， 硕士

【摘要】 循环流化床锅炉(CFBB)是一个分布参数、非线性、时变、多变量耦合紧密的控制对象,在先进控制策略的应用中,难以建立其燃烧控制系统的精确数学模型。本文始终坚持紧密结合我国电厂控制的实际情况以解决电厂实际运行中存在的控制问题为出发点,紧紧抓住循环流化床电厂主汽压控制系统普遍存在的大滞后和特性时变的特点,力图对解决大滞后对象控制这一长期困扰电厂的控制难题进行一点探索工作。通过分析研究循环流化床锅炉燃烧系统特性,首先对单元机组的各系统进行了控制,在此基础上对三炉两机母管制机组的主汽压力控制系统和协调控制系统进行了设计,然后针对循环流化床锅炉的大延时特性,设计了一种以史密斯预估补偿控制和鲁棒控制为基础的内模控制器,通过仿真结果表明,该控制器上升时间短、超调小、过渡过程时间小,具有较强的鲁棒性,而且非常便于实际应用。更多还原

【Abstract】 Circulating fluidized bed boiler (CFBB) control strategies based on classical control theory or modern control theory all need exact mathematical models of controlled objects. It is very difficult to establish the exact mathematical models of controlled objects because the combustion system of circulating fluidized bed boiler is an object that has many features: distributed parameters, nonlinear, time-varying and a lot of tightly coupled variables. Dissertation is dedicated to solve the practical control problems in power plant on the basis of theoretical research. Under the existence of the dynamics characterized by non-linear, significant delay and time varying, the work strives to deal with the problems of significant delay objects control in large power plants, which have puzzled the power plants for long time. This text passes the analytical research CFBB combustion system characteristic, designed control system of power plant and bus system power plant. The improved Smith control strategies mentioned above based on Internal Model Control and robust control, have been applied to pressure control system with significant delay and time varying. The results indicate that the control quality, the speediness, the robustness are all superior. It is advantageous to be used in the practical control system.更多还原