二次再热汽轮机(超)高压排汽温度控制策略  

Temperature Control Strategy for(Super)High-pressure Cylinder Exhaust Steam of Double Reheat Steam Turbine Units

作　　者：张天海 汤可怡 高爱民[1] 殳建军[1] 刘娜娜 Zhang Tianhai;Tang Keyi;Gao Aimin;Shu Jianjun;Liu Nana(Jiangsu Frontier Electric Power Technology Co., Ltd., Nanjing 211102, China)

机构地区：[1]江苏方天电力技术有限公司,南京211102

出　　处：《发电设备》2020年第5期352-357,共6页Power Equipment

摘　　要：为提高二次再热机组运行可靠性,分析了二次再热机组(超)高压排汽温度的影响因素及(超)高压排汽温度异常时汽轮机数字电液控制系统(DEH)相对应的控制策略,针对汽轮机切缸工况,结合旁路系统设计容量及DEH现有控制策略等,提出了切缸优化控制策略。结果表明:通过与旁路控制系统协调运行,可以有效减小机组由于(超)高压排汽温度异常导致的机组跳闸概率,保证二次再热机组安全稳定运行。To improve the operation stability of double reheat steam turbine units,an analysis was conducted on the factors affecting the temperature of(super)high-pressure cylinder exhaust steam in double reheat steam turbine units,while a discussion was carried out on the control method applied in the DEH system when abnormal temperature appears.Considering the bypass system capacity and DEH control method,the cutting off strategy was optimized for the steam turbine.Results show that through cooperative operation with the bypass control system,the unit trip probability due to abnormal temperature of(super)high-pressure cylinder exhaust steam could be reduced,while stable operation of the unit could be ensured.

关 键 词：二次再热 (超)高压排汽温度 DEH 切缸 

分 类 号：TK323[动力工程及工程热物理—热能工程]