锅炉再热器温度控制系统设计摘要 PID 控制器由于具有结构简单、实现容易，鲁棒性较强的优点，因此被广泛应用于锅炉再热器温度控制中。目前，锅炉再热汽温控制中，再热蒸汽出口温度控制要求高、可控性差，工艺上对再热汽温控制的质量有非常严格的要求。再热汽温的相对稳定在锅炉安全性和经济性运行中有着重要的作用。由于再热器具有大惯性、非线性、时变、多变量和有自平衡能力等特点，如何运用 PID提高再热汽温的控制效果，是本文的重要讨论课题。 本文在较为全面地对 PID 控制器参数整定方法的现状分析讨论的基础上通过推导非线性鲁棒控制器与二自由度 PI/PID 控制器的等价形式，提出了二自由度 PI/PID 参数整定规则—预期动态法(DDE)；并通过对某一电厂锅炉再热器的具体分析和讨论，通过 MATLAB 仿真与传统的 PID 做对比来说明这一方法的可行性，已便于提高锅炉实现安全、经济、可靠、优化和环保的要求，具有宽阔的应用前景。 关键词：PID，锅炉再热器，二自由度 PID，ATLAB，控制效果。Boiler Reheater Temperature Control System Design AbstractBecause the PID controller has the advantages of simple structure, easy realization, good robustness advantages, it is widely used in Boiler Reheater Temperature control. At present, the boiler reheat steam temperature control in reheat steam outlet temperature, high control requirements, poor controllability, technology of reheat steam temperature control quality has very strict requirements. The reheat steam temperature is relatively stable in boiler safety and economic operation has an important role in. As a result of reheater has great inertia, nonlinear, time-varying, multivariate and self balance ability and so on, how to use PID to improve the reheat steam temperature control effect, is the important research subject.In this paper, a more comprehensive parameters of PID controller tuning method based on the analysis of the current situation through the derivation of nonlinear robust controller with two degrees of freedom PI/PID con...
