动态矩阵控制算法在超临界机组给水系统中的应用研究

发布时间：2018-05-26 13:23

本文选题：动态矩阵控制算法 + 超临界机组　；参考：《华北电力大学》2017年硕士论文

【摘要】：随着经济社会的发展,工业和生活用电量不断增长。发电企业在保证发电质量和规模方面承担着至关重要的责任。在当前和未来很长的一段时间内,火力发电仍然是我国发电领域占主导地位的发电形式。超临界机组是近十几年来,我国着力发展建设的机组形式。超临界机组发电效率高、环境污染低、经济效益好,相应的其控制策略也更为复杂。它采用直流炉形式,给水系统是其核心控制系统之一。给水品质对负荷和主汽温度都有着显著的影响。优化超临界机组给水控制策略,应用新型控制算法,是近年来超临界机组控制优化的研究热点之一。本文在分析超临界机组给水控制系统的结构和特性基础上,合理选择控制对象,应用动态矩阵控制算法,改进控制策略,实现了基于中间点温度校正的给水主控的优化。动态矩阵控制算法是预测控制的一种,近年来以其优秀的控制特性已经广泛应用于石油化工等工业场合,具有良好的动态性能和鲁棒性。本文研究借助某超临界机组全工况仿真系统研究平台,通过仿真平台获取运行数据,使用Matlab工具箱辨识出典型工况下传递函数模型,提出用于动态矩阵控制算法使用的预测模型一种自适应改进办法。用Matlab软件编写了动态矩阵控制算法程序,先在Matlab环境下仿真检验了控制效果,与传统PID控制效果进行了仿真对比,后编写通信程序,实现Matlab与PAS-300M仿真机的通信。在仿真机平台上应用新型控制算法,验证了给水控制品质得到改善。
[Abstract]:With the development of economy and society, the electricity consumption of industry and living is increasing. Power generation enterprises are responsible for ensuring the quality and scale of power generation. Thermal power generation is still the dominant power generation form in the field of power generation in China for a long time now and in the future. Supercritical unit is a new type of unit in China in the past ten years. The power generation efficiency of supercritical unit is high, the environmental pollution is low, the economic benefit is good, and the corresponding control strategy is more complicated. It adopts the form of DC furnace, feed water system is one of its core control systems. The quality of feed water has a significant effect on load and main steam temperature. In recent years, the optimization of feed water control strategy for supercritical units and the application of new control algorithms have become one of the research hotspots in the control optimization of supercritical units. On the basis of analyzing the structure and characteristic of the feed water control system of supercritical unit, the control object is reasonably selected, and the dynamic matrix control algorithm is applied to improve the control strategy, which realizes the optimization of the main control of feed water based on the temperature correction of the intermediate point. Dynamic matrix control (DMC) algorithm is a kind of predictive control. In recent years, it has been widely used in petrochemical industry due to its excellent control characteristics, and has good dynamic performance and robustness. In this paper, with the help of the research platform of the full-condition simulation system of a supercritical unit, the operation data are obtained through the simulation platform, and the transfer function model under typical operating conditions is identified by using the Matlab toolbox. This paper presents an adaptive improvement method for predictive model used in dynamic matrix control algorithm. The dynamic matrix control algorithm program is written with Matlab software. The control effect is tested by simulation under Matlab environment, and compared with the traditional PID control effect. Then the communication program is written to realize the communication between Matlab and PAS-300M simulator. A new control algorithm is applied on the simulator platform, which verifies the improvement of the quality of the feed water control.
【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】：TM621

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