基于S7-400 DCS的干熄焦发电汽轮机控制系统研制

发布时间：2018-01-12 01:07

本文关键词：基于S7-400 DCS的干熄焦发电汽轮机控制系统研制　出处：《大连理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：本课题研究内容指向中小型余热蒸汽发电汽轮机控制领域,通过设计与实践寻求种性能稳定、操作简单、成本较为低廉的蒸汽轮机控制方法。论题应用价值在于干法熄焦过程中余热的回收与利用,目的是将余热转化为过热蒸汽的内能用于发电进而产生附加效益。课题要解决的问题：汽轮机组启停、辅机控制、负荷调整、保护连锁控制和蒸汽的减温减压控制并生成重要参数报警记录和实时历史曲线等。近年来发电蒸汽轮机控制手段发展迅速,分布式控制系统为基础的数字式电液控制已经广泛应用。这类系统具有很高的可靠性和灵活性,应用实践中已经取得了较好的经济效益。课题的基础理论基于集散控制原理,计算机控制系统与设计理论,面向对象程序设计理论、智能检测与转换技术,研究余热蒸汽发电汽轮机控制系统。本课题的研究方法是采用分布式控制系统(DCS)搭建一个系统平台,应用数字式电液控制系统实现对蒸汽轮机的控制。本课题所选择的SIEMENS S7-400 DCS是一个结构开放的控制系统,采用先进的硬件控制设备、网络设备可满足现代发电汽轮机系统稳定性、快速性、实时性的要求,并兼顾小型发电机组投资成本有限的实际情况。论文所做的具体工作包括：收集和整理软件编程的主要技术依据：统计和分类系统控制点及硬件选型：硬件和网络结构组态建立软件编程环境；供油系统、保安系统的控制程序的设计；TSI检测系统的选型和设置；主要工艺流程图可视化设计；系统运行与调试记录等等。
[Abstract]:The research contents of this paper point to the field of steam turbine control of small and medium-sized waste heat steam power generation. Through the design and practice, we seek the stability of performance and simple operation. The application value of steam turbine control method lies in the recovery and utilization of residual heat in the process of dry coke quenching. The purpose is to convert the waste heat into the internal energy of superheated steam to generate additional benefits. The problems to be solved are as follows: steam turbine unit start and stop, auxiliary machine control, load adjustment. In recent years, the control methods of steam turbine have been developed rapidly, such as protecting interlock control, reducing temperature and reducing pressure of steam, and generating important parameter alarm record and real time history curve. Digital electro-hydraulic control based on distributed control system has been widely used. This kind of system has high reliability and flexibility. The basic theory is based on distributed control theory, computer control system and design theory, object-oriented programming theory, intelligent detection and conversion technology. Research on steam turbine control system of waste heat steam generation. The research method of this subject is to use distributed control system (DCS) to build a system platform. The digital electro-hydraulic control system is used to realize the control of steam turbine. The SIEMENS S7-400 DCS selected in this paper is an open structure control system. With advanced hardware control equipment, network equipment can meet the requirements of stability, rapidity and real-time of modern power turbine system. The specific work of this paper includes: collecting and arranging the main technical basis of software programming: statistical and classification system control points and hardware selection:. Hardware and network configuration establish software programming environment; Design of control program for oil supply system and security system; The selection and setting of TSI detection system; Visual design of main process flow chart; System running and debugging records and so on.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK263

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