汽轮机组滑压运行最优初压的确定  

DETERMINATION OF THE OPTIMAL INITIAL PRESSURE IN SLIDING-PRESSURE OPERATION OF STEAM TURBINES

作　　者：李永玲[1] 张春发[1] 王惠杰[1] 张宝[2] 谢飞[1] 黄宇[1] 

机构地区：[1]华北电力大学,河北保定071003 [2]浙江省电力试验研究所,杭州310014

出　　处：《热力发电》2006年第4期42-43,61,共3页Thermal Power Generation

摘　　要：运用系统分析的方法,在综合考虑主蒸汽压力的变化对调节级效率、给水泵耗功、通流部分效率、过热器和再热器的温度变化等影响的基础上,建立了汽轮机动态最优运行初压的数学模型。以张家口电厂300MW汽轮机的运行数据进行计算,并与制造厂所给最佳运行曲线相比较,结果表明:最优运行初压不是负荷的单值函数,而是与机组运行环境有关的复杂函数。Utilizing systematic analysis method, a mathematical model for determining the dynamic optimal initial pressure in sliding-pressure operation of steam turbines has been established on the basis of comprehensively considering the factors. such as the influence of main steam pressure variation upon efficiency of the governing stage, power consumption of the feed-water pump, efficiency of the flow passage, temperature variation of the superheater and the reheater etc. Taking 300 MW steam turbines in Zhangjiakou Power Plant as example, the operation data have been calculated, and comparison with the optimal operation curve provided from the manufacturer being made. Results show that the optimal initial pressure of operation isn’t a single-valued function of the load, but a complex funtion related to the operation environment of the unit.

关 键 词：300MW汽轮机 主蒸汽压力 滑压运行 最优初压 热耗率 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]