1000MW超超临界机组给水全程控制的设计和应用  

Design and Application of Global Feedwater Control in 1 000 MW Ultra Supercritical Units

作　　者：张利勇 刘潇[2] 

机构地区：[1]神华国华国际电力股份有限公司北京热电分公司,北京100025 [2]西门子电站自动化有限公司,南京211100

出　　处：《浙江电力》2013年第8期38-42,84,共6页Zhejiang Electric Power

摘　　要：超超临界机组的给水控制既承担过热汽温控制又与负荷控制密不可分,在机组启停阶段还承担防止蒸发器超温和水动力稳定的重要任务,是超超临界机组控制系统的核心和难点,而其全程控制的实现也是机组级顺控(APS)能否实现的重要一环。详细介绍给水全程控制3种模式(停炉、湿态和干态)的控制原理及其切换过程、干态模式下的煤水比控制和焓值控制原理,给出了给水全程控制中特殊工况的处理原则和方案。Feedwater control in ultra supercritical units is responsible for temperature control ol superheated steam and closely related to unit load control. During unit startup and shutdown, feedwater control takes the important task to prevent the evaporator overtemperature and stabilize the hydrodynamic. It is the core and difficulty of control system of ultra supercritieal units, and the realization of the global feedwater control is one of the important links of the implementation of automatic plant startup and shutdown control system （APS）. Closed-loop of feed water entire-process control is described by taking a real case. Tile control theory and switching process of the three modes （furnace shutdown, wet and dry） of global feedwater control, coal- water ratio control and enthalpy control principle in dry mode are expounded. The paper presents principle of management and scheme for special operating condition in global feedwater control.

关 键 词：超超临界机组 火电机组 给水全程控制 模式切换 

分 类 号：TK323[动力工程及工程热物理—热能工程]