电厂汽轮机组变负荷运行安全经济性分析  

Safety and Economic Analysis on Variable Load Operation of Steam Turbine Unit in Power Plant

作　　者：张希富 王运民[2] 师保平 夏成锐 

机构地区：[1]华润电力登封有限公司,郑州450000 [2]长沙理工大学能源与动力工程学院,长沙410114 [3]鹤壁丰鹤发电有限责任公司,鹤壁458000

出　　处：《汽轮机技术》2014年第6期464-466,408,共4页Turbine Technology

基　　金：国家重点基础研究发展计划(973计划)基金资助项目(2009CB219803-03)

摘　　要：电厂汽轮机组变负荷运行时常采用定压运行和滑压运行两种方式,但这两种运行方式对机组运行的经济性和安全性的影响是完全不同的。借助某电厂600MW汽轮机组运行数据,通过计算和分析,比较了汽轮机组不同负荷下定压运行和滑压运行的汽耗率、热耗率、绝对电效率、调节级温度、高压缸排汽温度等重要指标。研究证明,部分负荷下采用滑压运行方式,既可以提高机组的热经济性、降低机组能耗,又能够保证设备的运行安全性、改善整个机组的调峰性能。Steam turbine unit often adopts constant pressure or sliding pressure operation modes under variable load operation, but these two kinds of operation modes are completely different in the influence on economy and Security. According to the 600 MW steam turbine unit Is operation data, this paper compared the steam rate, heat rate, absolute electrical efficiency ,temperature of governing stage and exhaust temperature of high pressure cylinder of steam turbine unit with constant pressure and sliding pressure operation modes under variable load operation by way of detailed calculation and analysis. The research proves that steam turbine unit adopting sliding pressure operation under partial load not only can improve the thermal economy of unit and reduce the energy consumption, but also can ensure the running safety of equipment and improve the unit′s peak-load regulating performance.

关 键 词：汽轮机组 变负荷 定压运行 滑压运行 热经济性 调峰 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]