燃气-蒸汽联合循环发电机组轴系配置的思考

Consideration of power train configuration of gas turbine combined cycle power plants

燃气-蒸汽联合循环发电机组因高效、节能、环保而越来越受到重视, 为此, 从我国当前大力发展燃气-蒸汽联合循环发电机组的实际情况出发, 全面分析联合循环机组轴系的配置型式及其影响, 重点比较了单轴和多轴“2拖1”机组在设备投资、占地面积、建设周期、起动停机、功率和效率、检修和控制系统方面的优缺点, 为燃气-蒸汽联合循环发电新机组建设的轴系配置提供参考。

Gas turbine combined cycle(GTCC)power plants have been widely applied to modern power industry due to their high thermal efficiency,economical benefit and less emission properties.On the basis of currently rapid development of GTCC power plants in China,this paper thoroughly analyzes all the technical and economic influential factors during the consideration of power train configuration of GTCC power plants.And especially,the differences between the single shaft combined cycle and “2 on 1” multi-shaft combined cycle are compared,which include the plant investment,civil engineering of power train,construction period,start-up and shutdown performance,thermal efficiency,maintenance and control system etc.,which provides important reference for the design of GTCC power plants.