某火电机组汽电双驱引风机小汽轮机热态甩负荷时调门超驰开度对炉膛负压的影响  

Influence of Optimal Gate Override Opening on Furnace Negative Pressure for a Thermal Power Unit With Steam-Electric Dual-Drive Induced Draft Fan Steam Turbine in Thermal State Load Shedding

作　　者：李展 尤默 冯斌 秦天牧 邢智炜[1] 尚勇[1] 刘磊[1] 高爱国[1] 康静秋[1] LI Zhan;YOU Mo;FENG Bin;QIN Tianmu;XING Zhiwei;SHANG Yong;LIU Lei;GAO Aiguo;KANG Jingqiu(North China Electric Power Research Institute Co.,Ltd.,Beijing 100045,China;North China Electric Power Research Institute(Xi’an)Co.,Ltd.,Xi’an 710065,Chin)

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]华北电力科学研究院有限责任公司西安分公司,陕西西安710065

出　　处：《锅炉技术》2023年第4期52-58,共7页Boiler Technology

摘　　要：为研究某火电机组风烟系统采用汽电双驱型引风机时,引风机小汽轮机发电机甩负荷对小汽轮机及炉膛负压的影响,通过机组热力系统模型的搭建及仿真研究,提出在热态工况发生引风机小汽轮机发电机甩负荷的情况下,可通过超驰逻辑对小汽轮机调门进行控制,实现机组不发生辅机故障减负荷(RB)的事故,同时可维持炉膛负压在合理的范围内。仿真结果发现在不同负荷下进行甩负荷,可以得出一个较优调门超驰值,并通过试验验证了此方法的可行性。a To study the impact of load shedding by the small turbine generator of induced draft fan on the negative pressure of the small turbine and furnace when the air and flue gas system of a thermal power unit adopts a steam-electric dual-drive induced draft fan,through the construction and simulation research of the thermal system model of the unit,it is proposed that in the case of load shedding of the induced draft fan small turbine generator under hot working conditions,the control of the small turbine regulating valve can be achieved through override logic,so as to avoid the occurrence of auxiliary equipment failure and load shedding runback(RB)in the unit,while maintaining the furnace negative pressure within a reasonable range.The simulation results found that an optimal throttle override value can be obtained by load shedding under different loads,and the feasibility of this method was verified through experiments.

关 键 词：汽电双驱 引风机小汽轮机 甩负荷 较优 超驰值 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]