燃气-蒸汽联合循环变工况性能和控制策略的研究  

Study on Off-design Performance and Control Strategies of Gas and Steam Combined Cycle

作　　者：乔红[1] 曹越[1] 戴义平[1] 

机构地区：[1]西安交通大学叶轮机械研究所,陕西西安710049

出　　处：《热能动力工程》2017年第3期33-39,共7页Journal of Engineering for Thermal Energy and Power

摘　　要：采用已推导建立的新一代F级300 MW重型燃气轮机及其控制系统的数学模型,建立了燃气-蒸汽联合循环关键部件的设计和变工况预测模型,主要包括:透平的变工况模型,单压余热锅炉的设计和变工况模型以及增压泵的变工况模型。利用上述模型,在Matlab平台对该系统进行了变工况性能研究,分析了定压运行和复合变压运行下余热锅炉和汽轮机的变工况特性,证明了复合变压的控制策略有明显的优越性,其中定压-滑压-定压的控制策略最优。This paper establishes a design and off-design model for the gas and steam combined cycle( CCGT) based on a new generation 300 MW class heavy-duty gas turbine model,and the models mainly include those for multistage axialflow turbine,single-pressure waste heat boiler and booster pump. Then a CCGT is studied using Matlab to analyze its off-design performance under constant pressure operation and sliding pressure operation by varying the gas turbine load. The comprehensive control strategy is studied with different load of gas turbine and compared with other control strategies. The results show that the comprehensive is better than other control strategies,and the constant-sliding-constant pressure operation is the best.

关 键 词：单压余热锅炉 定压运行 复合变压运行 联合循环 

分 类 号：TK172[动力工程及工程热物理—热能工程]