单元机组FSSS控制系统分析

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单元机组FSSS控制系统分析
摘要
 随着电厂机组容量越来越大，参数越来越高，机组的控制变得越来越复杂。大容量、高参数机组安全运行的重要性日益提高，先进的机组保护系统和装置得到了广泛采用。锅炉炉膛安全监控系统（FSSS）是大型火力发电机组锅炉必须具备的一种监控系统。为了更全面深入地对FSSS有个系统的认识，本文主要以大中型火电厂单元机组的FSSS系统为研究对象，在深入地学习自动控制系统、自动控制仪表、生产过程自动控制的基础上，对单元机组控制系统的结构、原理及FSSS的系统的设计思想、系统组态方法等进行研究。深入了解FSSS的系统结构和运行特点，准确掌握FSSS系统的防爆理论和炉膛燃烧管理方法。
 通过对新华控制工程有限公司设计的华能淮阴#3机DCS中的FSSS的几个主要功能比如炉膛吹扫、总燃料跳闸（MFT）、总油燃料跳闸（OFT）、点火失败等的系统功能和设计方法进行了详细的讲解，简单介绍了FSSS的结构和系统设计。
 由于设备厂家较多，逻辑控制各有不同，不同的锅炉类型采用的控制逻辑也不同，所以在使用中难免存在各种各样的问题，本文最后还对现在的FSSS存在的问题进行了讨论。
关键词：炉膛吹扫、FSSS、MFT、OFT。

The analysis of Unit plant FSSS control system
Abstract
 With the increasing capacity of power plant units, the parameters are increasing，The control of the unit has become more complex. The importance of Safe Operation are increasing to the high-capacity, high- parameters unit. The advanced protection systems and devices have been widely used. Furnace Safety Supervising System (FSSS) is a supervising system which a large-scale thermal power unit boiler must have. In order to have a more comprehensive and in-depth understanding of the FSSS system, this paper mainly to study the FSSS system of a large and medium-sized thermal power plant unit .On the basis of in-depth study the automatic control system, automatic control instruments, process control of the production .so we will have a study of the unit control system structure, principle and the design of FSSS system, the system  configuration, and so on., Understanding of the structure and operating characteristics of the FSSS system. Know the FSSS system's explosion-proof theory and the chamber combustion management accurately.
 By Explaining several major function of Hua Neng Huaiyin #3 machine DCS FSSS which designed through the Xin hua control engineering limited company, for instance ,chamber blew sweeps, the main fuel trip (MFT), the total oil fuel trip (OFT), the ignition defeat and so on. The systemfunction and the design method in detail．Introduced the FSSS structure and the system design simply.
 For there are many equipment factory, the logical control has the difference respectively, the different boiler type uses the control logic are also different, therefore they have various problems unavoidably in the use, this article also has carried on the discussion to present's FSSS existence question in the end.
Keywords:  FSSS、The chamber blows sweeps 、MFT、OFT.

目录
摘要： I
Abstract II
1 绪论 1
1.1  概述 1
1.2  本文选题背景 2
1.3  本文主要完成的工作 3
2  FSSS的基本概念和功能特点 4
2.1  锅炉炉膛安全监控系统的定义 4
2.2  FSSS的基本系统结构 4
2.3  FSSS的基本功能 5
3 锅炉炉膛安全监控系统（FSSS）的逻辑控制 9
3.1   炉膛吹扫控制逻辑 9
3.1.1  炉膛吹扫 9
3.1.2  点火油泄露试验逻辑 12
3.2  总燃料跳闸控制逻辑 12
3.2.1  MFT跳闸条件 13
3.2.2  主燃料跳闸后的锅炉连锁： 14
3.2.3  全炉膛火焰丧失 15
3.2.4  炉膛燃料丧失 17
3.2.5  点火失败 18
3.3   油燃料控制逻辑 19
3.3.1  油燃料跳闸条件 19
3.3.2  投油允许控制 20
结论 21
参考文献 23
致谢 24

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