低负荷工况下超临界机组给水泵并列运行的控制策略  

Parallel Running Control Strategy of Feed Pumps at Low Load of a Supercritical Unit

作　　者：俞康 李卓霖 

机构地区：[1]广东珠海金湾发电有限公司,广东珠海519050

出　　处：《发电设备》2017年第3期209-212,共4页Power Equipment

摘　　要：分析了一台600 MW超临界机组低负荷工况下发生给水泵跳闸问题,提出在未触发RB时,通过超驰控制回路提前开启给水泵汽轮机高压调节门,提升给水泵转速达到目标转速的控制策略。实践表明:采用该控制策略后迅速提升锅炉给水流量,保证了机组的安全运行。To solve the problem of feed pump trip occurring at low load of a 600 MW supercritical unit, a method is proposed by opening the high-pressure governing valve of the feed pump turbine in advance through override control when the RB function is not triggered, so as to raise the pump speed to the target value. Results show that the feed water flow of boiler can be prompted rapidly after the control strategy is applied, which helps to secure the safety of unit operation.

关 键 词：火电机组 低负荷工况 给水泵跳闸 锅炉给水流量 超驰控制 

分 类 号：TK223.7[动力工程及工程热物理—动力机械及工程]