基于GA的主汽温系统内模控制研究

Internal Model Control for Main Steam Temperature System Based on GA

摘要:

主汽温控制系统是典型的大迟延、大惯性、时变控制系统,一直以来都是火电厂自动控制的难点；为此将内模控制引入主汽温控制系统,并提出采用遗传算法对滤波器参数λ优化整定,该方法简单易行,相较于传统PID参数整定方法具有一定的优越性；并对内模控制为主控制器的IMC-PI控制系统进行SIMULINK仿真,与PID-PI控制系统进行对比,仿真结果表明IMC-PID控制系统相比于传统PID-P串级控制系统过渡时间短、超调量小、鲁棒性好等特点；其控制效果好于常规串级 PID 控制系统,适用于大迟延、大惯性过程的控制,并且易于在工业上实现。

Abstract:

The main steam temperature control system is a typical large delay, large inertia and time-varying control system. It has always been the difficulty of the automatic control in power plants. Therefore introduce the internal model control to the main steam temperature control system, and use genetic algorithm to optimize the filter parameter. Adopts internal model control as master controller and build its simulation model by computer simulation software MATLAB/SIMULINK. Compared with PID-PI control system, the results show that the IMC-PID control system has the shorter transition time , smaller overshoot and better robustness.Its better than the conventional cascade PID control system,easy to implement in the industry and suitable for the large delay and large inertia process control. 