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簡介: S11油浸式凯时k66平台過電壓現象簡要分析: (1)操作過電壓 在一般配電網中,使用的絕大多數是降壓凯时k66平台,下面就以降壓凯时k66平台空載拉閘操作為例說明操作過電壓產生的原因。 在定性分析時,匝間電容的影響可略去不計。空載凯时k66平台從電網上拉閘時,如果空載電流的瞬時值不等于零而是某一數值Ia,這時相應的外施電壓瞬時值為Ua。于是在拉閘操作瞬間,電感L1中儲藏的磁場能量為1/2Ll?I2a,電容C’Fe上儲藏的電場能量為1/2C’FeU2a。 由于這時凯时k66平台的電 | |
S11油浸式凯时k66平台GUODIANYAXIANXIANGJIANYAOFENXI: (1)操作過電壓 ZAIYIBANPEIDIANWANGZHONG,SHIYONGDEJUEDADUOSHUSHIJIANGYA凯时k66平台,XIAMIANJIUYIJIANGYA凯时k66平台KONGZAILAZHACAOZUOWEILISHUOMINGCAOZUOGUODIANYACHANSHENGDEYUANYIN。 ZAIDINGXINGFENXISHI,ZAJIANDIANRONGDEYINGXIANGKELVEQUBUJI。KONGZAI凯时k66平台CONGDIANWANGSHANGLAZHASHI,RUGUOKONGZAIDIANLIUDESHUNSHIZHIBUDENGYULINGERSHIMOUYISHUZHIIa,ZHESHIXIANGYINGDEWAISHIDIANYASHUNSHIZHIWEIUa。YUSHIZAILAZHACAOZUOSHUNJIAN,DIANGANL1ZHONGCHUZANGDECICHANGNENGLIANGWEI1/2Ll?I2a,DIANRONGC’FeSHANGCHUZANGDEDIANCHANGNENGLIANGWEI1/2C’FeU2a。 YOUYUZHESHI凯时k66平台DEDIANLUSHIYOUDIANGANL1DIANRONGC’FeBINGLIANDEDIANLU,GUZAILAZHACAOZUOSHUNJIAN,HUILUNEIJIANGFASHENGDIANCIZHENDANGGUOCHENG。ZAIZHENDANGGUOCHENGZHONG,DANGMOUYISHUNJIANDIANLIUDENGYULINGSHI,CISHICICHANGNENGLIANGQUANBUZHUANHUAWEIDIANCHANGNENGLIANG,YOUDIANRONGXISHOU,DIANRONGSHANGDEDIANYABIANSHENGGAODAOZUIDAZHIUcmax。DANGLAZHACAOZUODIANLIUHEDIANRONGSHANGDEDIANYAYIDINGSHI,RAOZUDEDIANGANYUDA,DUIDIDIANRONGYUXIAO,ZELAZHACAOZUOGUODIANYAYUGAO。ZAIDIANLIXITONGZHONG,CAOZUOGUODIANYATONGCHANGBUCHAOGUOEDINGDIANYADE30YI4.5BEI。 (2)大氣過電壓 DAQIGUODIANYASHI🐠♛YOUSHUDIANXIANLUZHIJIEZAOSHOULEIJIHUOLEIYUNFANGDIANSHI,DIANCICHANGDEJULIEBIANHUASUOYINQIDE。DANGSHUDIANXIANLUZHIJIEZAOSHOULEIJISHI,LEIYUNSUODAIDEDALIANGDIANHE(SHEWEIZHENGDIANHE)TONGGUOFANGDIANQUDAOLUODAOSHUDIANXIANSHANG,DALIANGDEZIYOUDIANHEXIANGSHUDIANXIANLUDELIANGDUANCHUANBO,JIUZAISHUDIANXIANSHANGYINQICHONGJIGUODIANYA,CHENGWEILEIDIANGUODIANYA。LEIDIANBOYOULINGSHANGSHENGDAOZUIDAZHIZHEYIDUANCHENGWEIBOTOU,XIAJIANGBUFENCHENGWEIBOWEI。 RUGUOBABOTOUSUOZHANSHIJIANKANCHENGSHIZHOUQIBODE1/4ZHOUQI,ZELEIDIANBOKEKANCHENGSHIPINLVJIGAODEZHOUQIXINGBO。ZHEYANG,DANGGUODIANYABODAODA凯时k66平台JIEXIANDUANSHI,XIANGDANGYUGEI凯时k66平台JIASHANGLEYIGEPINLVJIGAODEGAODIANYA。ZHEYISHUNBIANGUOCHENGHENKUAI,YIKAISHI,YOUYUZAIGAOPINXIAwLHENDA,YINCI,1/wCHENXIAO,DIANLIUZHICONGGAOYARAOZUDEZADIANRONGHEDUIDIDIANRONGZHONGLIUGUO。YOUYUDIYARAOZUKAOJINTIEXIN,TADUIDIDIANRONGHENDA (JIRONGKANGHENXIAO),KEJINSIDIRENWEIDIYARAOZUJIEDI。 DANGLEIDIANBOXIJISHI,YANRAOZUGAODUSHANGDEDIANYAFENBUQUJUEYUZAJIANDIANRONGC’Fe,HEDUIDIDIANRONGC’FeDEBILI。ZAIYIBANQINGKUANGXIA,YOUYULIANGZHONGDIANRONGDOUCUNZAI,GUODIANYASHI,YIBUFENDIANLIUYOUDUIDIDIANRONGFENLIU,GUMEIGEZAJIANDIANRONGLIUDEDIANLIUBUXIANGDENG,KAOJINSHUDIANXIAN💎DUANDEZAJIANDIANRONGLIUGUODEDIANLIUZUIDA,YUEWANGHOUZEYUEXIAO。
隨著電壓沿繞組高度的分布變為不均勻,起始電壓分布很不均勻,靠近輸電線端的前幾匝間出現很大的電壓梯度,因此,在靠近輸電線端的前幾個線匝里,匝間絕緣受到很大的威脅,這時最高匝間電壓可能高達額定電壓的50一200倍。 |
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