1050MW超超临界复合阀机组配汽优化技术研究及应用  

Research and Application of Steam Admission Optimization Technology for 1050MW Ultra Supercritical Compound Valve Unit

作　　者：郑恒 祝建飞 韩宝军 陈显辉[3] ZHENG Heng;ZHU Jian-fei;HAN Bao-jun;CHEN Xian-hui(Shenhua Funeng Power Generation Co.Ltd.,Quanzhou,China,Post Code:362712;Shanghai Minghua Electric Power Science&Technology Co.Ltd.,Shanghai,China,Post Code:200090;DongFang Steam Turbine Works,Deyang,China,Post Code:618000)

机构地区：[1]神华福能发电有限责任公司,福建泉州362712 [2]上海明华电力科技有限公司,上海200090 [3]东方汽轮机有限公司,四川德阳618000

出　　处：《热能动力工程》2021年第4期1-7,共7页Journal of Engineering for Thermal Energy and Power

摘　　要：某1050MW超超临界汽轮机组原设计采用复合配汽方式,在部分负荷下4个高压进汽调阀均存在节流损失,影响机组经济性。通过高压调阀-双流调节级的仿真建模计算,从理论上分析了适用的配汽方案,并对调节级叶片进行了强度校核;通过适应性试验分析了不同阀序组合对汽轮机轴系稳定性的影响,最终优选合适的阀序组合方式;修改DEH及DCS逻辑增加顺序阀控制方式,实现复合阀和顺序阀的无扰切换,在顺序阀方式下进行滑压寻优试验。热耗率对比试验表明:顺序阀方式可大幅降低中低负荷下供电煤耗率,实现宽负荷经济运行。The original design of a 1050MW ultra-supercritical steam turbine unit of Dongfang Turbine Company Ltd adopts compound steam distribution mode.Throttle loss exists in four high-pressure regulating valves under medium and low load,which affects operation economy.Through the simulation modeling calculation of the high-pressure regulating valve-double-flow regulating stage,the suitable steam distribution scheme of the high-pressure regulating valve is theoretically analyzed,and the strength of the regulating stage blades is checked.The influence of different valve sequence combinations on the stability of the steam turbine shafting is analyzed through the adaptability test,and finally the appropriate valve sequence mode is selected.DEH and DCS logic is modified and the sequential valve control mode is added to realize undisturbed switching between compound valve and sequential valve.Sliding pressure optimization test is carried out under sequential valve mode.The comparative test shows that the sequential valve can greatly reduce the coal consumption rate of power supply,and the effect of energy saving is evident.

关 键 词：超超临界机组 配汽优化 阀序切换 宽负荷经济运行 

分 类 号：TK269[动力工程及工程热物理—动力机械及工程] TK32