基于大广坝水电站水轮机提效增容改造研究

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1、西安理工大学学报JournalofXi’anUniversityofTechnology(2015)Vo1．31No．17文章编号：1006-4710(2015)01—0007—06大广坝水电站水轮机提效增容改造研究王钊宁，罗兴铸，郭鹏程，程宦，王亚林(1．西安理工大学水利水电学院，陕西西安710048；2．东方电气集团东方电机有限公司，四JII德阳618000)摘要：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

2、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9O．8；与改造前相比，加权平均效率增幅可达2．0。关键词：大广坝水电站；混流式水轮机；改造；水力设计；效率；稳定性中图分类号：TP311．11文献标志码：AImprovingefficiencyandincreasingcapacityofthehydraulictu

3、rbineinDaguangbaHydropowerPlantWANGZhaoning，LUOXingqi，GUOPengcheng，CHENGHuan，WANGYalin(1．FacultyofWaterResourcesandHydroelectricEngineering，Xi’anUniversityofTechnology，Xi'an710048，China；2．DongfangElectricMachineryCo．，Ltd．，Deyang618000，China)Abstract：Anewretrofittingmethoda

4、ndtargetarepresentedbymeansofanalyzingthephenome—nonofhydraulicinstabilityandthereasonofrelativelylOWturbineefficiencybasedonthetrans—formationprojectreferringtoDaguangbaHydropowerstationinHainan，meanwhile，hydraulicDarametersselectionanddesignconceptionarediscussedindetail

5、s．Also，thispaperintroducestheessentia1differenceofrunnerchannelbetweenpre—and—postretrofit．Accordingtothefullpassagenumericalsimulationcomputation，thehydraulicstabilityofretrofittedFrancisrunnerisaualitativelyevaluatedandtheefficiencylevelisquantitativelyindicated．Finally，

6、thepaperhasDredictedthecomprehensivefeaturecurvesofthemodelwater-turbine．Theconclusionsindicatethatthemode1turbineoptimumefficiencyexceeds93．8，theratedefficiencyandweightedaver—ageefficiencyarerespectively91and89．3comparedwith95．19／6optimumefficiency，92．4ratedefficiency．an

7、d90．8％weightedaverageefficiencyoriginatingfromtheprototypeturbine；theweightedaverageefficiencyofthemodelturbinesignificantlyincreases2．0bycontrastwiththeoneoftheprototypeturbine．Keywords：DaguangbaHydropowerPlant；francisturbine；retrofitting；hydraulicdesign；effi—ciency；stabi

8、lity收稿日期：2014—06—03基金项目：国家自然科学基金资助项目(51479166)；教育部高等学校博士学科点专项科研基金资助项目(20126118130002)；陕西省