上游并联双调压室水电站瞬变流特性分析.pdf

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1、水利水电技术第48卷2017年第6期上游并联双调压室水电站瞬变流特性分析周建旭，张巧丽(河海大学，江苏南京210098)摘要：由于长引水式水电站受地质地形条件、工程施工条件和系统运行稳定性等因素限制，为保证其安全运行，设置并联双调压室。通过建立调压室上游侧各支路阀门瞬变流水力特性的分析模型，以及考虑并联调压室水力特性的稳定性分析模型，深入分析了系统特殊的爆管瞬变流过程和水力振动特性。结果表明：在对应不同的爆管口直径同一爆管点位置，蝶阀至调压室之间管段最大瞬时流量为额定流量的1．14～2．21倍。随着爆管口直径的加大，不同特征

2、管段的最大瞬时流量增大。考虑同一爆管口直径对应不同的爆管点位置，蝶阀至调压室之间管段最大瞬时流量为额定流量的1．25～1．67倍。随着爆管点和调压室距离增大，不同特征管段的最大瞬时流量增大。在任一支路爆管等不利情况下，通过相应支路阀门的控制可以降低复杂的瞬变流过程对另一正常运行支路的影响。研究所得水力一机械系统特征值分析成果对揭示引水系统水力振动特性具有参考价值。关键词：水利水电工程；水电站；并联调压室；瞬变流doi：10．13928／j．cnki．wrahe．2017．06．013中图分类号：TVl34；TV732．5文献

3、标识码：A文章编号：1000—0860(2017)06．0066—06Analysisoncharacteristicsoftransientflowofhydropowerstationwithupstreamparallel-doublesurgechamberZHOUJianxu，ZHANGQiaoli(HohaiUniversity，Nanjing210098，Jiangsu，China)Abstract：Asthelong-distancewaterdiversionhydropowerstationisrestr

4、ictedbythehctorsofgeologicalandtopographicalcon—ditions，constructionconditions，systemoperationstabihties，etc．，theparallel-doublesurgechamberisarrangedforensuringitssafeoperation．Throughestablishingboththemodelforanalyzingthehydrauliccharacteristicsofthetransientflo

5、wsthroughallthebranchvalvesattheupstreamsideofthesurgechamberandthemodelforanalyzingthestabilityofthehydrauliccharacteristicsoftheparallelsurgechamber，thespecialpipe—bursttransientflowprocessandthehydraulicvibrationcharacteristicsofthesystemaredeeplyanalyzedherein．

6、Theresultshowsthatthemaximumtransientdischargeofthepipelinesectionbetweenbutterflyvalveandsurgechamberis1．14～2．21timesoftheratedflowrateatthesamepipe—burstpointthatiscorrespondingtodifferentpipe—burstdiameters．Followingwitlltheincreaseofthepipe·burstdiameter．themax

7、imumtransientflowratesofthedifferentcharac—teristicpipelinesectionsaretobeincreased．Consideringthatthesamepipe-burstdiameteriscorrespondingtodifferentlocationsofpipe-burstpoints，themaximumtransientdischargeofthepipelinesectionbetweenbutterflyvalveandsurgechamberis1

8、．25～1．67timesoftheratedflowrate．Alongwiththepipe·burstpointbeingfarawayfromthesurgechamber，themaximumtransi—entflowratesofthedifferentcharacteris