【作者】 唐胜利； 刘诗； 阎欣军； 钟晓春； 杨晨；

【Author】 Tang Sheng-li,Liu Shi,Yan Xin-jun,Zhong Xiao-chun,Yang Chen (1 School of Power Engineering,Chonqing University,Chongqing 400044,2Northwest Electric Power Design Instituteof China Power Engineering Consulting Grop,XiAn 710075)

【机构】 重庆大学动力工程学院； 中国电力工程顾问集团西北电力设计院；

【摘要】 为了分析600MW火力发电空冷机组汽动给水泵驱动汽轮机的排汽直接排至直冷系统的可行性,基于模块化建模原则,建立了该机组的直流锅炉系统及汽机汽水系统的数学模型,在数学模型的基础上完成整个汽水系统的动态仿真模型。通过仿真试验表明:采用一套直冷系统的方案是可行的;在高负荷和高背压工况下,可以保证给水流量,但难以保证机组的输出功率;高压汽源和小机的超负荷能力对于保证系统运行有很大影响。本分析结果对直冷汽动给水泵的设计及安全、优化运行具有一定的指导意义。更多还原

【Abstract】 In order to analyze the feasibility of a direct cooling system of the feed water pump steam driven turbine in a 600MW thermal power unit with direct air-cooling system,based on the principle of modular modeling,the mathematical models of the boiler and turbine system are proposed,and the dynamic simulation models are also obtained.The simulation results show that basically the direct cooling system is feasible,but at high loads it is difficult to guarantee the output power of the unit when the feed water flow is guaranteed,and the high pressure steam source and the overload capacity is important in this system.The results of this paper are useful for the design and optimal operation of a feed water pump.更多还原