多模型内模控制器在主汽温的应用研究

针对火电厂主汽温被控对象的大惯性、大滞后特点并且负荷变化对被控对象参数影响较大等因素，PID控制器的控制效果很难达到满意。提出基于多模型内模切换控制方案。被控对象的传递函数的模型在不同的工况下建立，并设计出与其相对应控制器，在不同运行工况选择相应的控制器，实现全工况下安全运行。基于新的目标函数的二阶振荡进化方程来调节粒子群算法对内模控制参数进行优化。仿真表明，该方案比传统PID控制具有更好的控制品质。

Applied Study on Multi-model Internal Model Controller in Main Steam Temperature

According to Superheated steam temperature for thermal power plants controlled object with a large delay, large inertia characteristics of the object parameters and characteristics with a large load change, PID control is difficult to achieve satisfactory control effect. According to the performance of superheated steam temperature, the internal model control （IMC） method based on multiple models is suggested. According to the operating conditions over which the con- trol system is expected to operate, a set of linear models is developed and the controllers associated with each model are designed. By means of choosing a appropriate pair of controllers at the different load operating scope the multi - pair controllers can satisfy the control performance specifications over the entire operating conditions of the plant. The new ob- jective function based on second -order evolution equations to adjust the oscillating the internal model control parameters. Simulation Results lessons show that the contro PID control has better control quality. particle swarm algorithm to optimize 1 scheme more than the conventional