基于“汽电双驱技术”的大型燃煤发电机组优化方法  

Optimization method for large-scale coal-fired power plant based on steam-electric dualdrive technology

作　　者：吕凯[1] 王妍 王春燕 刘向阳[2] 马汀山[1] 何茂刚[2] Lü Kai;WANG Yan;WANG Chunyan;LIU Xiangyang;MA Tingshan;HE Maogang(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Key Laboratory of Thermal Fluid Science and Engineering of MOE,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]西安交通大学热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《热科学与技术》2021年第4期372-379,共8页Journal of Thermal Science and Technology

摘　　要：以1 000 MW级超临界燃煤发电机组为研究对象,基于"汽电双驱"的思路提出了5种大型燃煤发电机组的优化设计方案,旨在解决燃煤发电机组中电动机驱动引风机耗能过大的问题。采用汽电双驱优化方法后,引风机动力源范围变宽,对复杂多变的电力形势具有更强的适应能力,引风机可靠性增强。进而计算了小汽轮机输出功率和进汽流量、厂用电率、供电煤耗率和投资回收周期等参数,对比分析了5种优化方案对机组运行性能的影响。结果显示:中高负荷段选用纯凝式汽轮机的方案产生的供电煤耗率增加值低于其余4个方案,但该方案系统较为复杂,投资相对较高。Taking the 1 000 MW supercritical coal-fired power plant as the research object, five optimization schemes for large coal-fired power plant based on the idea of ″steamelectric dual drive″ was proposed, aiming to solve the problem of excessive energy consumption caused by driving induced draft fans by motor. With the adoption of the steam-electric dual drive optimization method, the range of the power sources for the induced draft fans was widened, providing stronger adaptability to the complex and changeable power situation and enhancing the reliability of the induced draft fans. Furthermore, the output power and steam flow rate at the inlet of small steam turbine, auxiliary power ratio, coal consumption rate, investment recovery period and other parameters were calculated, and the impact of five optimization schemes on the performance of the plant was compared and analyzed. The results show that the increase in coal consumption rate produced by the scheme of using condensing steam turbines at the medium and high load is lower than the other four schemes, but this scheme is more complicated and its investment is relatively high.

关 键 词：汽电双驱 供电煤耗率 大型燃煤发电机组 经济性 

分 类 号：TK269[动力工程及工程热物理—动力机械及工程]