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Classificationmethodofprimaryfrequencymodulationoperatingareaofmixed - flow
hydropowerunits :TakingLaxiwahydropowerstationasanexample
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XUBeibei ,JINJiahui ,ZHOUYe,CHENDiyi ,ZHANGZhen,ZHAOHao 5
(1.KeyLaboratoryofAgriculturalSoilandWaterEngineering,MinistryofEducation,NorthwestA&FUniversity,Yangling 712100,China;
2.CollegeofWaterConservancyandConstructionEngineering,NorthwestA&FUniversity,Yangling 712100,China;
3.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China;
4.HuangheHydropowerDevelopmentCo.,Ltd.,Xi’ning 810008,China;
5.ShaanxiZhen’anPumpedStorageCo.,Ltd.,Xi’an 710061,China)
Abstract:Theprimaryfrequencyregulationperformanceofvariableheadwideloadofmixed - flowhydropowerunit
isanimportantcoretoconstructflexiblepowerbalancesystemandensurefrequencystability.Underthepremiseof
stabilitytestofhydropowerstation ,thispaperproposesamethodofoperationclassificationbasedontheelectrical
characteristicsofprimaryfrequencymodulation.Themethodtakestheadjustmenttime,stabilitytimeandintegral
powerastheclassificationcriteria,andusestheregionalarea,regionalcenterandregionalcomprehensiveper
formancetoevaluatethesystem.TakingtheLaxiwahydropowerstationofthenorthwestfrequencymodulationpower
plantasanexample ,themathematicalmodelisverifiedbycomparingwiththeexperimentaldata.Onthebasisof
confirmingtheaccuracyofthecalculation ,takingthefrequencymodulationperformanceastheoptimizationgoal,
theinfluencelawofwatermechanicalandelectricalparameterssuchaspipediameter,momentofinertiaandinte
gralgainontheoperationclassificationisexplored.Finally ,thecontributionofhydro - mechanicalparametersto
frequencymodulationperformanceandoperationareaissummarized,andtheoptimizationdirectionofprimaryfre
quencymodulationoperationofmixed - flowhydropowerunitswithvariableheadandwideloadispointedout.
Keywords:mixed - flowhydropowerunits;primaryfrequencymodulation;operationarea;variablehead;wide
load
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