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首页> 外文会议>HydroVision 2008 conference technical papers >JOCASSEE UNITS 3 4 RUNNER REPLACEMENT PROJECT
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JOCASSEE UNITS 3 4 RUNNER REPLACEMENT PROJECT

机译：JOCASSEE单元3和4的跑步者更换项目

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This paper will discuss the upgrade of Units 3 & 4 at Duke Energy Carolinas, LLC's (DukernEnergy) Jocassee Pumped Storage Station near Salem, SC. The four-unit powerhouse is of thernsemi-outdoor type and is located on the upper reaches of Lake Keowee, adjacent to the LakernJocassee Dam.rnThe original Jocassee pump-turbine hydraulic design and model test was conducted in 1969.rnThe units, rated 150 MW each generating at peak efficiency and 175 MW each at maximumrnoutput, were placed into commercial service in 1973. The historical average gross head for thernproject is 309 feet.rnThere have been significant advancements in pump-turbine hydraulic design technology sincernthe Jocassee units were designed, manufactured and installed, and economic drivers haverngrown in the region around the ability to provide peaking capacity in short time spans. Afterrnconsiderable technical and economic evaluation, a decision was reached to install new runnersrnin the units to realize significant projected economic gain. The new runners were designed,rnmodel tested, and manufactured by Voith Siemens Hydro (VSH) in their York, PA manufacturingrnfacility. The Jocassee pump-turbine runners are the largest diameter, single piece pump turbinernrunners ever shipped from the York shop.rnThe new runners are approimately 7.5m in diameter, 3.25m tall, and weigh approximately 150 trneach. The number of runner vanes increased from 6 to 9 in order to handle the desired increasernin flow and capacity. For this reason, Rotor Stator Interaction (RSI) and Wave FrontrnSuperposition analyses were completed prior to project release for manufacture. Thisrnengineering effort was undertaken as a due diligence measure to provide proper mitigationrnagainst undesirable vibrations that may occur as a result of the different forcing frequenciesrnresulting from the planned design changes.rnThe new runners have been installed and the relative increase in performance realized isrnstunningly impressive. The results are based on comparison of baseline index tests versus postmodificationrnindex tests using the same procedures and test instrumentation. Operation in bothrngenerating and pumping modes is also very smooth, with no undesirable resonant frequenciesrnor cavitation. A project for replacement of the remaining identical Unit 1&2 runners has beenrninitiated.rnTopics covered in this paper include the design, manufacture, transportation, installation, andrntesting results associated with the installation of new runners in these large pump-turbines. Therngoal of this article is to provide insight on the current state-of-the-art in pump-turbine hydraulicrndesign and manufacture as well as relative performance increases that pumped storage projectrnowners may expect for this vintage of pump-turbine.
机译：本文将讨论南卡罗莱纳州杜克能源公司（DukernEnergy）Jocassee抽水蓄能电站附近的3号和4号机组的升级。四单元动力室是半户外型，位于基奥维湖上游，毗邻LakernJocassee大坝.rn最初的Jocassee水轮机水力设计和模型试验是在1969年进行的.rn这些机组的额定功率为150 MW 1973年，每台机组均以最高效率发电，每台机组最大输出功率为175 MW。该项目的历史平均总水头为309英尺。自设计，制造Jocassee机组以来，水泵水轮机设计技术有了重大进步。并已安装，经济驱动力在该地区变得越来越短，能够在短时间内提供峰值容量。在进行了相当多的技术和经济评估之后，决定在单元中安装新的流道，以实现可观的预期经济收益。福伊特西门子水电（VSH）在宾夕法尼亚州约克市的制造厂对新的流道进行了设计，模型测试和制造。 Jocassee水泵水轮机转轮是约克商店有史以来最大直径的单片水泵水轮机转轮。新的转轮直径约为7.5m，高度为3.25m，重约150 trneach。转轮叶片的数量从6个增加到9个，以应对所需的流量和容量增加。因此，在发布制造项目之前，已经完成了转子定子相互作用（RSI）和波前叠加分析。这项工程工作是作为尽职调查措施，旨在提供适当的缓解措施，以防止由于计划的设计变更而导致的不同强迫频率而产生的不良振动。安装了新流道，并且性能的相对提高令人印象深刻。结果是基于使用相同的程序和测试仪器比较基准指数测试与修改后指数测试的结果。在发电和泵浦两种模式下的运行也非常平稳，没有不希望的共振频率或气蚀现象。已启动了一个替换其余相同的1号和2号单元流道的项目。本文涵盖的主题包括与在这些大型泵涡轮机中安装新流道相关的设计，制造，运输，安装和测试结果。本文的目标是提供有关水轮机水力设计和制造的最新技术的见解，以及抽水蓄能项目业主可期望的这种水轮机相对性能的提高。

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