300MW机组锅炉给水过热气温再热气温控制系统.doc

摘要 火力发电在我国电力工业中占有主要的地位，是我国电力生产的支柱。火力发电机组锅炉给水、主汽温控制系统是电厂自动控制的一个难点， 如果控制不好，就会影响火电厂的正常生产，所以其控制有很严格的要求。 本设计结合300MW火电机组给水系统、过热蒸汽和再热蒸汽系统设备的实际情况，以及动态特性，以自动控制理论和计算机技术为基础，利用美国西屋公司OVATION分散控制系统设计而成。具有稳定性，准确性和快速性的特点，能够在线，实时采集过程参数，实时对系统信息进行加工处理，结果能迅速反馈给系统，完成自动调节和控制，以及在不同工况下的无扰切换，使机组在安全经济运行，减少事故的同时，能够提高设备的可靠性及运行效率方面得到进一步的保证。 [关键词] 给水控制 过热蒸汽汽温控制 再热蒸汽汽温控制 Abstract The thermal power occupies the main position in the electric power industry, is the our country electric power to produce of pay the pillar.A boiler water supply of the thermal power machine, the main air temperature control system is a power station to control automatically an a little bit difficult, if the control is not good, will affect the normal production of the fire power station, so its control contain very strict request. This design combines a water supply system of the 300 MW fire electrical engineering, leads the hot steam and again the actual circumstance of the hot steam system equipments, and the dynamic state characteristic, take automatic control theories and the calculator techniques as the foundation, make use of the American west house company OVATION dispersion control system design but become.Have the stable line, under a different from characteristics of fast, can be on-line, solidly hour collect the process parameter, solidly hour carry on processing the processing to the system information, result ability quickly feedback give system, complete auto regulate and control, and at work condition of cut over without the , make the machine set circulate in the safe economy, reduce the trouble at the same time, can raise the credibility and the movement efficiencies of the equipments to get the further assurance. [ Keyword] Feedwater Control Superheat Steam Temperature Control Reheat Steam Temperature Control 目录 摘要 I Abstract II 引言 1 第一章 分散控制系统（DCS）简介 2 1．1分散控制系统介绍 2 1．2美国西屋公司 Ovation系统分析 2 1．2．1 Ovation控制器的硬件组成 3 1．2．2 Ovation控制器的组态软件 4 1．2．3 Ovation控制器软