二自由度模型驱动PID在超临界机组控制中的应用研究

发布时间：2018-03-11 12:46

本文选题：MD-TDOF-PID控制器　切入点：汽温控制系统　出处：《华北电力大学》2017年硕士论文　论文类型：学位论文

【摘要】：基于模型驱动的二自由度PID(MD-TDOF-PID)控制是近些年来对传统PID控制的有效改进方案之一。其控制性能优良、结构简单、参数易于整定,具有很好的实用性,有望在工业过程控制中得到很好的应用。首先,介绍了MD-TDOF-PID控制算法的构成及主要模块,对其控制性能、控制对象适应性及控制器参数整定等方面进行了分析及仿真研究,并与传统PID的进行了对比。然后,针对MD-TDOF-PID控制器难以投入现场使用的问题分析了原因,对控制器进行了结构上的改进,设计了一个可以实现手自动无扰切换的改进型MD-TDOF-PID控制器。通过仿真验证,改进后的控制器可以实现各种情况下的手自动无扰切换,并且具有良好的控制性能。最后,本文对MD-TDOF-PID控制器进行了工程应用研究。以国电哈密大南湖2×660MW超临界机组过热汽温系统为被控对象,设计了MD-TDOF-PID控制逻辑,在EDPF NT+型DCS上进行了组态,利用激励式仿真机上进行了仿真研究。结果表明,本文改进后的MD-TDOF-PID控制算法容易在DCS上直接组态,可以实现手自动无扰切换,参数易于调整,对于过热蒸汽系统这样的高阶对象具有很好的控制性能,可以满足火电厂生产现场要求。
[Abstract]:The model driven two-degree-of-freedom (MD-TDOF-PID-based) control is one of the most effective methods to improve the traditional PID control in recent years. Its control performance is excellent, its structure is simple, its parameters are easy to set, and it has good practicability. It is expected to be well applied in industrial process control. Firstly, the composition and main modules of MD-TDOF-PID control algorithm are introduced. The control performance, the adaptability of control object and the tuning of controller parameters are analyzed and simulated. And compared with the traditional PID. Then, aiming at the problem that the MD-TDOF-PID controller is difficult to be used in the field, the reason is analyzed, and the structure of the controller is improved. An improved MD-TDOF-PID controller is designed, which can realize manual automatic unscrambling switching. The simulation results show that the improved controller can realize the hand automatic unscrambling switching under various conditions, and has good control performance. In this paper, the engineering application of MD-TDOF-PID controller is studied. Taking the superheated steam temperature system of Hami Dananhu 2 脳 660MW supercritical unit as the controlled object, the MD-TDOF-PID control logic is designed and configured on the EDPF NT DCS. The simulation results show that the improved MD-TDOF-PID control algorithm is easy to be configured directly on the DCS, and the hands can be automatically switched without disturbance, and the parameters can be adjusted easily. High order objects such as superheated steam system have good control performance and can meet the requirements of thermal power plant production site.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM621

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