热力发电2024，Vol.53Issue(11)：89-100,12.DOI:10.19666/j.rlfd.202407179
重型燃气轮机联合循环机组三压再热余热锅炉动态建模及运行规律研究
Dynamic modeling and operating rules of three-pressure reheat waste heat recovery steam generator in heavy-duty gas turbine combined cycle unit
摘要
Abstract
Against the dynamic operation characteristics of three-pressure reheat waste heat recovery steam generator(HRSG)of gas turbine combined cycle(GTCC)unit,the Modelica open-source programming language is used to build the simulation model for the HRSG,and the simulation results are compared with the actual operation data during peak load regulation process of the power plant.Under actual operating conditions,the established model can accurately predict the dynamic response laws of main parameters of the HRSG in the dynamic process of steady-state operation after the load drops from full load to low load,then increases from low load to full load,as well as unit shutdown and boundary parameter disturbance.When the unit load decreases from 320 MW to 280 MW,the power of the steam turbine decreases from 124.0 MW to 111.5 MW.The high pressure main steam flow rate decreases from 70.12 kg/s to 63.62 kg/s,and the high pressure main steam pressure decreases from 8 250 kPa to 7 612 kPa.The flue gas parameters at inlet of the HRSG change in about 300 s with the decrease of the unit load,while the steam parameters of the HRSG need about 600 s to complete dynamic response and reach steady state at low load,indicating there is a certain lag in steam parameters of the HRSG compared to the change of gas turbine exhaust gas parameters over time.In the dynamic process the unit shut down,the power of the steam turbine decreases from 130.4 MW to 5.4 MW,the high pressure main steam temperature of the HRSG decreases from 600.1℃to 224.5℃,and the high pressure main steam flow rate reduces from 76.1 kg/s to 15.3 kg/s.关键词
联合循环发电厂/余热锅炉/调峰/变负荷/动态建模Key words
combined cycle unit/heat recovery steam generator/peak regulation/variable load/dynamic modeling引用本文复制引用
王一丰,奚新国,袁源,阴海强,苏通,曹殿尧,刘加湗,章文茜,李军,翟春华,黄庆,肖俊峰,牛晨晖,苏新民,焦道顺,潘赫男,王乾远..重型燃气轮机联合循环机组三压再热余热锅炉动态建模及运行规律研究[J].热力发电,2024,53(11):89-100,12.基金项目
中国华能集团有限公司总部科技项目(HNKJ20-H42) Science and Technology Project of China Huaneng Group Co.,Ltd.(HNKJ20-H42) （HNKJ20-H42）
