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配电系统油浸式变压器的选型方案

作者:油浸式变压器厂  发布日期:2019-09-09  

足球彩票ZHENGQUEJIEXIANSHIDEYOUGONGGONGLVWEI:P=Pa+ Pc =UabIa.cos(30°+φa)+ Ucb.Ic.cos(30°-φc); SANXIANGDIANLUPINGHENGSHI,Uab=Ucb=√3U,Ia=Ic=√3I,JI,P=3UI cosφ JIARUAXIANGYOUJINSHIBIANYAQIJIXINGJIEFAN,XIANGJIANTU2 TU2ZHEIYANGWOMENKEYIDECHU:GONGYONGXIANDEIoSHIXIANGDE√3BEI; DIANNENGBIAOYIDEZHIHOUDEJIAODUWEI:30°+φa+180°=210°+φa; DIANNENGBIAOERZHIHOUDEJIAODUWEI:30°-φc; SUOYICUOWUJIEXIANSHIDEYOUGONGGONGLVWEI: P′=Pa′+ Pc′=Uab.Ia.cos(210°+φa)+ Ucb.Ic.cos(30°-φc)=UIsinφ; RUOGONGLVYINSHUcosφ=0.9,ZEDANGAXIANGJILIANGYOUJINSHIBIANYAQIJIXINGJIEFAN,LOUJIDIANNENGWEISHIJIJILIANGDIANNENGDE: P/ P′-1=3UIcosφ/UI sinφ-1=3×0.9/0.4359-1=5.19BEI; (2)JILIANGJIEXIANFANGSHISANXIANGSIXIAN ZHENGQUEJIEXIANSHIDEYOUGONGGONGLVWEI:P=Pa+ Pb+ Pc =UaIa.cosφa+ Ub.Ib.cosφb+Uc.Ic.cosφc; SANXIANGDIANLUPINGHENGSHI,Ua=Ub=Uc=U,Ia=Ib=Ic=I,JI,P=3UIcosφ JIARUAXIANGYOUJINSHIBIANYAQIJIXINGJIEFAN,XIANGJIANTU3TU3 ZHEIYANGWOMENKEYIDECHU:GONGYONGXIANDEIoSHIXIANGDE2BEI,AXIANGWEI-Ia; SUOYICUOWUJIEXIANSHIDEYOUGONGGONGLVWEI: P′=Pa+Pb+Pc=-UaIa.cosφa+Ub.Ib.cosφb+ Uc.Ic.cosφc= UIcosφ; ZEDANGAXIANGJILIANGYOUJINSHIBIANYAQIJIXINGJIEFAN,LOUJIDIANNENGWEISHIJIJILIANGDIANNENGDE: P/ P′-1=3UIcosφ/UIcosφ-1=2BEI; 3.3.BAOHUYONGYOUJINSHIBIANYAQI 3.3.1BAOHUYONGYOUJINSHIBIANYAQIJIUSHIWEIBAOHUYONGJIDIANQITIGONGDEYOUJINSHIBIANYAQIQI,YUJIDIANQIDENGLEISIDIANQIPEITAOSHIYONG,ZHUYAOYONGYUPEIDIANXITONGGUOZAIBAOHUHEDUANLUBAOHU。ZHUYAOZHUNQUEJIYOU:5P、10P,5、10BIAOSHIFUHEWUCHA5%、10%,ZHUNQUEXIANZHIXISHUYOUJIAOXIANZHIXISHU,TASHIEDINGZHUNQUEXIANZHIYICI(CISHIFUHEWUCHABUCHAOGUO5%、10%)YUEDINGYICIDEBIZHI,ZHUNQUEXIANZHIXISHUYOU,5、10、15、20, 3.3.2BAOHUYONGYOUJINSHIBIANYAQIZAIPEIDIANXITONGZHONGDEWENTIJIYINGYONGSHILI BAOHUYOUJINSHIBIANYAQIZAIPEIDIANXITONGZHONG,ZHUNQUEJIYIJIZHUNQUEXIANZHIXISHUDEXUANZESHIYONGHUJINGCHANGPENGDAODEWENTI。 2003NIANHEBEIMOUGONGCHANG,YOUYUXINCHANGFANGKUOJIAN,ZAIXINCHANGFANG1500MIFUJINANZHUANGLEYITAI250KVA(10/0.4kV)PEIBIAN,YUZHUBIANJULI2500MI,YINFUHEJIAOXIAO(EDING80A),DANGSHIWEILEKAOLVJILIANGZHUNQUE,SHIYOUJINSHIBIANYAQIEDINGYICIYU******FUHEXIANGJIEJIN,JIANGYOUJINSHIBIANYAQIBIXUANZE100/5A,TONGSHIBAOHUYONGYOUJINSHIBIANYAQIXUANZE100/5A,10P10。ZAISHIGONGXIASHUIDAOSHI,JIANGDIANLANWADUAN,ZAOCHENGGONGCHANGFUJINDAMIANJITINGDIAN。 JINGDIANWANGCANSHUJISUANDE:ZHUBIANDUANLUDIANKANGWEIX1 = 0.07Ω,PEIBIANDUANLUDIANKANGWEIX2 = 0.5Ω,DUANLUDIANQIANDUANLUDIANKANGWEIX3= 0.4Ω, JISUANDIANKANGX*∑= X1 + X2 + X3 = 0.97。 XIANGDUANLUSHITALIUJINGCIZANTAIDUANLUZHOUQIFENLIANGYOUXIAOZHIWEI:I" = 1 / X*∑×5.5 = 5.67(kA),CISHIDUANLUSHIEDINGDE56.7BEI,YUANYUANDAYUZHUNQUEXIANZHIXISHU10,TONGSHIFUHEWUCHACHAOGUO10%SHI,YINGXIANGJIDIANQIDONGZUO,YINGGAIXUANZE500/5A 10P15。 3.4.SHENGYUYOUJINSHIBIANYAQI 3.4.1ZAIPEIDIANXITONGZHONGJIEDIBAOHUZHUYAOYOU:BAOHU(ZHONG、JUNKEYISHIYONG)HESHENGYUBAOHU(YECHENGLOUDIANBAOHU),LIANGZHEJIBENGONGZUOYUANLIXIANGTONGDOUSHIJIYUJIERHUOFUDINGLV,DANSHISHIYONGCHANGHEGENJUXITONGJIEDIFANGSHIDEBUTONGERBUTONG。SHENGYUYOUJINSHIBIANYAQIZHUYAOYUJIDIANQIPEIHESHIYONG,YECHANGCHANGYUDIANQIHUOZAIJIANKONGXITONGPEITAOSHIYONG,LINGMINDUGAO。 3.4.2SHENGYUYONGYOUJINSHIBIANYAQIYUYOUJINSHIBIANYAQIZAIPEIDIANXITONGZHONGDEQUBIE,XIANGJIAN(BIAO4),YIJISHENGYUHUGANZAIJIEDIXITONGFANGSHIBUTONGSHIDEYINGYONG,XIANGJIANBIAO(5)。 BIAO4SHENGYUYOUJINSHIBIANYAQIYUYOUJINSHIBIANYAQIDEQUBIE

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