超超临界二次再热火电机组RB功能试验及控制策略  

Research on RB Test and Control Strategy of an Ultra Supercritical Double Reheat Unit

作　　者：张天海 于国强[1] 殳建军[1] 管诗骈[1] 胡尊民 Zhang Tianhai;Yu Guoqiang;Shu Jianjun;Guan Shipian;Hu Zunmin(Jiangsu Frontier Electric Technology Co., Ltd., Nanjing 211102, China)

机构地区：[1]江苏方天电力技术有限公司,南京211102

出　　处：《发电设备》2017年第6期442-447,共6页Power Equipment

摘　　要：针对辅机故障快速降负荷功能(RB)在二次再热火电机组中的特殊要求,介绍了RB的含义和分类,结合国内某台1 000 MW超超临界二次再热机组RB动态试验过程,分析了RB控制在二次再热机组上的重点和难点,并对RB控制策略进行了优化。实践结果表明:RB功能试验动作逻辑正确;试验中水冷壁的超温问题经过一些改进也得到了解决,机组在RB发生后的安全性得到了保证。To satisfy the special requirement of runback （RB） function in double reheat thermal power units, an introduction was presented to the meaning and classification of RB. Based on the dynamic process of RB test for a domestic 1 000 MW ultra supercritical double reheat unit, an analysis was conducted on key points and difficulties of RB control in the double reheat unit, after which an optimization was carried out on the control strategy. Results show that the actions of RB logic are proved to be correct; the over-temperature problem occurring in the testing of water wall has been settled by appropriate improvements, and the unit safety is then secured after initiation of the RB function.

关 键 词：火电机组 二次再热 RB功能 控制策略 试验 

分 类 号：TM621.3[电气工程—电力系统及自动化]