超超临界汽轮机全负荷段性能优化试验研究  

Experimental Study on Performance Optimization of an Ultra-supercritical Steam Turbine over the Whole Load Range

作　　者：徐冒颖 刘伟 沈铭科 XU Maoying;LIU Wei;SHEN Mingke(Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海发电设备成套设计研究院有限责任公司,上海200240

出　　处：《动力工程学报》2020年第6期454-459,468,共7页Journal of Chinese Society of Power Engineering

基　　金：上海发电设备成套设计研究院有限责任公司青年基金资助项目。

摘　　要：为了得到机组经济性在全负荷段变化较小时的滑压曲线,对某1000 MW超超临界汽轮机组进行了全负荷段工况性能试验、宽负荷配汽方式性能试验、变背压特性性能试验及循环水泵优化试验,对全负荷段工况滑压曲线进行优化,并根据机组实际背压特性曲线和循环水泵优化试验结果调整滑压曲线,得到了经济性较优且满足负荷响应速率的滑压曲线。结果表明:同负荷下不同高压调节阀开度运行时,全开方式运行高压缸效率最高,热耗率最低,经济性最好,但负荷响应却较慢,采用38%高压调节阀开度可以满足负荷响应速率需求。To obtain the sliding pressure curve with small change in unit economy over the whole load range,performance optimization tests were carried out on a 1000 MW ultra-supercritical steam turbine unit,including the overall performance test,the wide-load steam distribution test,the variable back pressure performance test and the circulating pump optimization test,etc.The sliding pressure curve over the whole load range was optimized according to the actual back pressure characteristic curve and the results of the circulating pump optimization test,thus to achieve high efficiency of the unit with required rate of load respone.Results show that when the unit runs at the same load under different openings of the high-pressure control valve,the full-open operation mode would result in the highest cylinder efficiency,the lowest heat consumption,the highest unit economy,but relatively slow load response simultaneously.The requirement on load response could be satisfied at 38%opening of the high-pressure control valve.

关 键 词：超超临界汽轮机 全负荷 配汽方式 滑压优化 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]