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火电厂制粉系统预测函数控制策略仿真
张嘉英1, 王秀玲1, 武欣梅2
1.内蒙古工业大学 电力学院,内蒙古 呼和浩特 010080;2.内蒙古巴盟电业局,内蒙古 临河 015000
摘要:
采用预测函数控制系统结构实现对锅炉制粉系统的优化控制。通过预测模型、反馈与校正等部分,在控制过程中对目标函数进行优化计算得到各基函数的权系数而求出相应的控制量,使磨煤机出口温度、磨煤机入口负压和磨煤机进出口差压都控制在规定范围之内。通过预测函数控制系统与传统PID控制系统的仿真结果比较,可以证明该方法能够有效地解决系统变量之间的耦合关系,有较好的动态性能和稳态性能。
关键词:  预测函数控制  锅炉  制粉系统  Matlab  仿真
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Simulation of predictive function control for pulverizing system of power plant
ZHANG Jiaying1, WANG Xiuling1, WU Xinmei2
1.Electric Power College,Inner Mongolia Polytechnic University,Hohhot 010080,China;2.Inner Mongolia Bameng Power Bureau,Linhe 015000,China
Abstract:
The PFC(Predictive Function Control) is applied to realize the optimal control of boiler coal pulverizing system. Through the predictive model,feedback and emendation,the weight coefficient of each elementary function is achieved by the optimization calculation of objective function during control process to obtain the corresponding control variable,by which the inlet pressure and outlet temperature of mill,as well as the difference between inlet and outlet pressure,are controlled within the defined scopes. Comparison between PFC control and traditional PID control by simulation show that,the former lessens the effect of coupling between system variables and has better dynamic and steady-state performances.
Key words:  predictive function control  boilers  pulverizing system  Matlab  computer simulation

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