基于焓值控制的超临界机组给水控制策略优化与仿真研究  

Optimization and Simulation for Feedwater Control Strategy of Supercritical Unit Based on Enthalpy Control

作　　者：周丹[1] 李浩[1] 

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003

出　　处：《陕西电力》2014年第4期70-73,77,共5页Shanxi Electric Power

摘　　要：超临界机组中的控制技术是超临界发电技术中的重要一环,纯直流阶段的给水控制是超临界机组整个控制系统的核心之一。在传统给水控制系统的基础上,设计了以燃水比为基础,以控制住汽水分离器出口微过热蒸汽焓为目的的控制策略,进而达到控制给水量至合适值的目的,保证整个系统的平衡稳定。在机组变负荷工况下,将二者作为主控对象进行动态校正。仿真结果表明,优化控制策略之后的系统能将主蒸汽温度控制在可调范围之内,同时也保证了燃水比的精确性和快速性。The control technology in supercritical units is an important part of the supercritical power generation technology.The feedwater control in once-through stage means great to supercritical units.Based on the traditional water control strategy and watercoal ratio,the control strategy is designed for controlling the slightly-superheated steam enthalpy at the separator exit for the purpose of appropriate value and the stability guarantee of whole system.As the mainly-controlled objects,both slightly-superheated steam enthalpy and water-coal ratio are dynamically corrected.The simulation indicates that the improved control strategy can give dual attention to the accuracy and rapidity of the water-coal ratio and can keep the main superheated steam temperature within an adjustable range.

关 键 词：焓值控制 给水控制策略 优化 燃水比 超临界 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]