西安理工大学学报
西安理工大學學報
서안리공대학학보
JOURNAL OF XI'AN UNIVERSITY OF TECHNOLOGY
2015年
1期
7-12
,共6页
王钊宁%罗兴锜%郭鹏程%程宦%王亚林
王釗寧%囉興锜%郭鵬程%程宦%王亞林
왕쇠저%라흥기%곽붕정%정환%왕아림
大广坝水电站%混流式水轮机%改造%水力设计%效率%稳定性
大廣壩水電站%混流式水輪機%改造%水力設計%效率%穩定性
대엄패수전참%혼류식수륜궤%개조%수력설계%효솔%은정성
Daguangba Hydropower Plant%francis turbine%retrofitting%hydraulic design%effi-ciency%stability
基于海南大广坝水电站水轮机改造项目,通过分析电站运行中存在的水力不稳定现象和水轮机效率水平偏低的原因,提出了水轮机的改造方案和目标;讨论了水力参数和设计理念;介绍了改造前后转轮流道的本质差异。通过全流道数值仿真计算,定性评估了改造后水轮机的稳定性,定量标定了水轮机的效率水平,预期了模型水轮机的综合特性曲线。结论认为,改造后模型水轮机最优效率大于93.8%,额定效率91%,加权平均效率89.3%;原型水轮机最优效率95.1%,额定效率92.4%,加权平均效率90.8%;与改造前相比,加权平均效率增幅可达2.0%。
基于海南大廣壩水電站水輪機改造項目,通過分析電站運行中存在的水力不穩定現象和水輪機效率水平偏低的原因,提齣瞭水輪機的改造方案和目標;討論瞭水力參數和設計理唸;介紹瞭改造前後轉輪流道的本質差異。通過全流道數值倣真計算,定性評估瞭改造後水輪機的穩定性,定量標定瞭水輪機的效率水平,預期瞭模型水輪機的綜閤特性麯線。結論認為,改造後模型水輪機最優效率大于93.8%,額定效率91%,加權平均效率89.3%;原型水輪機最優效率95.1%,額定效率92.4%,加權平均效率90.8%;與改造前相比,加權平均效率增幅可達2.0%。
기우해남대엄패수전참수륜궤개조항목,통과분석전참운행중존재적수력불은정현상화수륜궤효솔수평편저적원인,제출료수륜궤적개조방안화목표;토론료수력삼수화설계이념;개소료개조전후전륜류도적본질차이。통과전류도수치방진계산,정성평고료개조후수륜궤적은정성,정량표정료수륜궤적효솔수평,예기료모형수륜궤적종합특성곡선。결론인위,개조후모형수륜궤최우효솔대우93.8%,액정효솔91%,가권평균효솔89.3%;원형수륜궤최우효솔95.1%,액정효솔92.4%,가권평균효솔90.8%;여개조전상비,가권평균효솔증폭가체2.0%。
A new retrofitting method and target are presented by means of analyzing the phenome‐non of hydraulic instability and the reason of relatively low turbine efficiency based on the trans‐formation project referring to Daguangba Hydropower station in Hainan ,meanwhile ,hydraulic parameters selection and design conception are discussed in details .Also ,this paper introduces the essential difference of runner channel between pre‐and‐post retrofit .According to the full passage numerical simulation computation ,the hydraulic stability of retrofitted Francis runner is qualitatively evaluated and the efficiency level is quantitatively indicated .Finally ,the paper has predicted the comprehensive feature curves of the model water‐turbine .The conclusions indicate that the model turbine optimum efficiency exceeds 93 .8% ,the rated efficiency and weighted aver‐age efficiency are respectively 91% and 89 .3% compared with 95 .1% optimum efficiency ,92 .4%rated efficiency ,and 90 .8% weighted average efficiency originating from the prototype turbine ;the weighted average efficiency of the model turbine significantly increases 2 .0% by contrast with the one of the prototype turbine .