主汽温系统混合H_2/H_∞最优PID控制  

Mixed H_2/H_∞ Optimal PID Control for Superheated Steam Temperature System

作　　者：梁伟平[1] 王佳荣[1] 

机构地区：[1]华北电力大学自动化系,保定071003

出　　处：《系统仿真学报》2016年第3期661-667,共7页Journal of System Simulation

摘　　要：针对火电厂主汽温控制系统非线性、大惯性、参数不确定以及存在未知干扰的特点,设计了混合H_2/H_∞最优PID控制方案。该方案在系统闭环稳定的前提下,给出H_∞性能的乘性摄动边界和PID控制器参数的有效范围。为了获得最优的性能指标,提出一种改进的引力搜索算法,利用典型测试函数验证了算法的有效性,并将该算法应用于主汽温系统的混合H_2/H_∞最优PID控制器参数优化。仿真结果表明,优化后的主汽温控制系统具有良好的控制品质,可以克服未知扰动,并且具有较强的鲁棒性。Aiming at the non-linear, large inertial, uncertain parameters and multi-disturbances of the main steam temperature object in power plants, a mixed H2/H∞ optimal PID control scheme was designed. The multiplicative perturbed boundary of the H∞ and the effective range of the PID controller parameters were given under the system being closed-loop stability. An improved gravitational search algorithm was proposed in order to obtain optimum performance indicators. The effectiveness of the algorithm was supported through testing on typical test functions, then the algorithm was applied to optimize the parameters of the main steam temperature system Mixed He/H∞ optimal PID controller. Simulation results show that the optimized main steam temperature control system has good control quality, and unknown disturbance can be overcome, and has strong robustness.

关 键 词：混合H2/H∞控制 引力搜索算法 主汽温系统 PID控制 鲁棒稳定 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]