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1、华北电力大学硕士学位论文关键词：水轮发电机；转子绕组匝间短路；空载曲线法；不平衡电磁力；故障诊断华北电力大学硕士学位论文AbstractWiththerapiddevelopmentofChina'seconomy,thepowerrequirementsareincreasing,andtheelectricitydemandisalsogrowing.Nowwiththeshortageofcoalresources,thecleanenergyisadvocated.Astheleadingmilitaryofcleanene
2、rgy,thehydropowerplaysanirreplaceablerole.Inthehydropowerplantmachineryisundoubtedlythemostimportanthydroelectric,andthereforeitssecurityisparticularlyimportant,andthefailureofashortcircuitbetweentherotorwindingsoftenappearsinhydro.Thispaperfirstlyintroducestheresearch
3、backgroundofhydro-generatorrotorwindinginterturnshortcircuit,andadoptsthemethodoffaulttree,andanalyzesthecausesoftheformationofhydro-generatorrotorwindinginterturnshortcircuitindetail,andillustratesthehydro-generatorrotorwindinginterturnshortcircuitandtheunbalancedmagn
4、eticpullresearchstatusathomeandabroad.SF600-42/1308typehydroelectricgeneratingissetastheresearchobject,andestablishamodelofhydro-generator,andfromtwoaspectssuchashydro-generatorno-loadcurvemethodandtheunbalancedmagneticpullmethodtostudy.Specifically,themaincontentandwo
5、rkare:(1)Introducethestructureofhydro-generatorrotor,andestablishthewindinginterturnshortcircuitmodel,andelaboratethehydro-generatorno-loadcurvemethodandtheunbalancedmagneticpullmethodoftheoreticalcalculationmethodindetail.Noloadcurvemethodexpoundsthevoltageandfluxlink
6、ageofhydro-generatorloopequationinthefirst,andthentellsthestoryofhydro-generatorparkerchangeandd,q,0underthesystemofelectromagneticflow.Unbalancedmagneticpullmethoddeducestheunbalancedmagneticpulldiscretizationexpressionindetail.Thesetwomethodsprovideatheoreticalbasisf
7、orthefollow-upstudy.(2)Thehydro-generatorrotorwindinginterturnshortcircuitfaultadetailedanalysisofthefailuremechanism,theconcretecanbedividedintonormalandrotorwindinginterturnshortcircuitwhentheelectromagneticpropertiesofthetwocases.Rotorwindinginterturnshortcircuit,tu
8、rntheshortroutebetweenthemagneticpotential,canbeequivalenttoademagnetizationmagneticpotentialsuperpositiontonormallyt
