双机回热系统抽背式小汽机技术路线研究  

Study on the Technical Route of Back Pressure Extraction Steam Turbine with Echelon Cycle Regenerative System

作　　者：王坚 WANG Jian(Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Wuhan 430071,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071

出　　处：《电力勘测设计》2023年第6期50-55,共6页Electric Power Survey & Design

摘　　要：探讨二次再热百万机组采用双机回热系统时抽背式小汽机的技术路线,分析在不同技术路线下,抽背式小汽机轴系配置特点、负荷调节特性以及不同负荷下的效率。以1 000 MW二次再热机组为实例,经过技术经济比较和综合论证,提出抽背式小汽机的技术方案选择以及平衡电机选型的原则。Research was made on the best technical solution to back pressure extraction steam turbine in echelon cycle regenerative system.Analysis are made on shaft installation stability,load regulation characteristic and efficiency under variable unit load etc.These analysis are made on the basis of a typical 1 000 MW double reheat USC power unit.The selection of technical solution to back pressure extraction steam turbine and the balance motor was proposed by techno-economic comparison.

关 键 词：双机回热系统 抽背式小汽机 平衡电机 汽电双驱 轴系稳定性 

分 类 号：TM621.2[电气工程—电力系统及自动化]