在电力系统中,为什么送电时必须先合母线侧刀闸,后合线路侧刀闸2019-10-09 20:23·农民工小二哥如下图1:1QS为母线侧刀闸,2QS为线路侧刀闸,CT为线路电流互感器电网倒闸操作规程中规定:送电时,必须先合1QS,后合2QS,最后合QF;停电时,先分QF,后分2QS,最后分1QS。图1这样设定的操作顺序理由是什么呢?如果先合2QS,再合1QS的可能会有什么不同的结果呢?下面分两种情况分析:第一种操作顺序:先合2QS后再合1QS。针对此问题,我们先得假设QF是处在误合闸状态(即开关本应该处在分闸位置,但由于某种原因开关已处在合闸位置,且未经操作人员发现),这时我们去合1QS,这时其实就是带负荷合刀闸,刀闸是不具备灭弧能力的,势必将造成接地短路故障,如下图2所示,此时的故障点1处故障电流不会经过本线路的CT,本线路的保护将不会启动,它将引起越级跳闸,造成整段母线停电。图2第二种操作顺序:先合1QS,再合2QS。同样假设QF处于误合闸状态,这时我们在合2QS时,一样是带负荷合刀闸,同样造成短路,但区别是现在的故障点将发生在如下图3故障点2的位置,这时该故障电流将流经本线路CT,CT二次电流会触发保护装置启动,同时向QF发出跳闸命令,切断故障电流。显然,此时的停电范围只有本线路。图3针对停电的操作顺序,按上面的思路推导结果是一致的。结论:这两种不同的操作顺序将可能造成不同的停电范围,第二种操作顺序可能造成的停电范围是本线路,而第一种操作顺序将造成整段母线的停电,因此,操作规程中,对此做了相应的规定必须先合母线侧刀闸1QS再合线路2QS。一点思考:如果没有出现开关误合闸的情况,也就是说合刀闸之前开关只要是在分闸位置,其实采用哪种操作顺序,都不会有什么区别的。以上纯属个人观点,如有瑕疵或不足,望指正。
2024年12月09日,与纳思达类似,中泰化学称,公司亦于6月10日获知美国国土安全部将公司列入“维吾尔强迫劳动预防法”的实体名单中。
品读经典丨相思诗词50首:人间最美的情话,全都在这里冲网易...
明太祖朱元璋以其果断与铁血手段名扬天下
男子未戴头盔在机动车道骑非机动车,逆行穿梭绕圈阻碍民警执行,被行拘一时间让不少网友觉得落差太大,有些下头:
zaishuozheduyuezuo,keshigechuanqirenwu。ta1888nianshengyujiangsuchuansha,bimengxiaodongzhengzhengdaliaoshijiusui。shisisuishi,duyuezuozhishenlaidaoshanghai,zaishiliupuyijiashuiguoxingdangxuetu。shuinengxiangdao,zhegexiangxialaideqiongxiaozi,rihouhuichengweishanghaitanzuozuofengyundedalao。taiwanxuanjujieshu,baidengdaibiaotuanjiuhuicuantai,baigong:jiangyudalubaochigoutongyuanchuang2024-01-11 15:40·youfengTalkjuetongshebaodao,youxiaoxirenshitoulu,zaitaiwanxuanjujieshudangtian,yizhiyoumeiguozongtongbaidengqinzipaiqiandemeiguoliangdangdaibiaotuanjiuhuicuantai。danyucitongshi,baigongyoufangchuxiaoxi,zaitaiwanxuanjuqijianhexuanjuzhihou,meiguoduhuiyuzhongguodaluzaiwaijiaohejunshicengmianbaochigoutong。name,baidengzhengfuzhexiecaozuodaodiyiyuheweine?#junshiguanchatuan#shishishang,duiyubaidengdezheyijihua,lianbushaomeiguozhuanjiaheqianguanyuandubukanhao,tamenyizhirenweizheshiyigezaogaoqiemaoxiandejueding。yilai,zijiujinshanhuiwuhou,zhongmeijinzhangguanxiyijingchuxianliaohuanhe,youqisuizhuozhongmeijunfanghuifugoutong,zhegengshidadajiangdiliaobicifashengwujiewupandefengxian。tangruomeiguozhegeshihouzaitaiwanwentishangcaiqutiaoxinxingjucuo,zhongmeiguanxiziranyouhuichuxianxindezhangai。erlai,gaixiaoxibeibaochudeshijiandian,yijimeiguoliangdangdaibiaotuancuantaideshijiandianduhenmingan。meifangrucigongranganshezhongguoneizheng,dengtongyuzaicizhengming,meifanggenbenbuhuiyangezuoshouguanyuzhichi“yizhong”hebuzhichi“taidu”dengzhongyaochengnuo。dangran,baidengzhengfuduicikendingyeshixinzhiduming。suoyiweiliaojiangdizhecicuantaideminganxing,baidengzhengfuzhishaozuoliaoliangshouzhunbei。genjuxiaoxirenshideshuofa,cicidaibiaotuanshiyouyixiemeiguoqiangaojiguanyuanzucheng。erbaidengzhengfuzheyangdeanpai,bupaichujiushixiangyaoyingzaoyizhongzheshifeiguanfangjiechudefenwei,ranhoubianchengmeiyouweifanmeiguozhichide“yizhong”zhengce。danhenxianran,napacuantaidezhishimeiguoqiangaojiguanyuan,zhexiexingdongyeshijuyoufeichangdadexiangzhengyiyi。daonei“taidu”fenlieshilizaijieshoudaocuowuxinhaoyihou,yijiuhuijiangqirenweizheshilaizimeiguodezhichi。erzhongfangzaoyiyouyanzaixian,womenjianjuefanduimeiguoyirenhexingshixuhuataokong“yizhong”。xiangbizhixia,baigongshengchengjiangzaitaiwanxuanjuqijianhexuanjuzhihouyuzhongguodalubaochigoutong,kongpacaishibaidengzhengfugeizijiliudetuilu。ruguoweichigoutong,baidengzhengfujiunengjishiqiekuaisudiliaojiezhongguodaludetaidu,yibimianfashengrenheyiwai。buguo,baidengzhengfuzheyangdezhunbei,mingxianjiushiduociyiju,yinweidalufangmianzaitaiwanwentishangdetaidushijueduibuhuidongyaode。zairiqiandezhongmeiguofangbugongzuohuiwuzhong,zhongfangdaibiaobianyanzhengbiaotai,womenzaitaiwanwentishangjuebuhuisihaotuoxierangbu,bingyaoqiumeifangjiangzhichi“yizhong”dengyouguanchengnuoluodaoshichu。suoyi,tangruobaidengzhengfuzhiyishitanzhongfanghongxian,womenbijiangcaiquxiangyingdecuoshiyuyijianjuehuiji。chaofengdeshi,bishimeifangdaibiaozengbiaoshimeifangbuhuidongyaozhichi“yizhong”delichang,ranershijiqingkuangqueshi,zheyangdechengnuo,meiguoshuotuifanjiutuifan。yinci,zaijiexialaidezhongmeijiaowangzhong,tangruomeifangnabuchurenheshijixingdong,womenwanquanmeibiyaozaijixushifangshanyiliao。zaimouzhongyiyishang,zhongfangzaijiujinshanhuiwutongyigenmeiguojunfanghuifugoutong,fanerzhishirangmeifangzaitaiwanwentishangdetiaoxinyoubiandesiwujidan,duizhongmeiguanxidehuanhebingmeiyouqidaoyuqidejijizuoyong。zimeiguoguohuiqianzhongyichangpeiluoxicuantaihou,guoquyinianduodeshijian,meiguoduzaixiangjinbanfaxiufuzhongmeiguanxi。yuanyinyehenjiandan,yinweibishizhongfangcaiqudebadafanzhicuoshi,quanbududazailiaomeiguodetongdian。ciwai,jiefangjunzaitaihaidechangtaihuaxunhang,yerangmeiguowujikeshi。suoyiwomentuice,meifangzhegeshihoufangchubaidengdaibiaotuancuantaidexiaoxi,henkenengzhishiweiliaozaiyidingchengdushang“jiexuan”,yejiushigeiminjindangzhantai,erbuhuifuzhuxingdong。danruguobaidengdaibiaotuanzhenquliao,buguanzuihoushuidangxuan,meifangdaibiaoduobanduhuixiangtamenjinyibuchuandacuowuxinhao。daoliaonageshihou,jibianrubaigongsuoyuan,zhongmeizaiwaijiaohejunshicengmianweichigoutong,danzhongfangyijiuhuicaiqubiyaocuoshijianjuehanweiguojiazhuquanhelingtuwanzheng。fenxirenwei,baidengzhengfuzhexiejuecetuxianchulaidemaodunxing,qishizuizhijiefanyingchulaidejiushibaidengzhengfuneibudehunluan。yifangmian,tamenbuxiangshiquguoquyinianduoweigaishanzhongmeiguanxierfuchudewaijiaonuli,danlingyigefangmian,meiguodaxuanyeyaolailiao,tamenyoudanxinruguozaitaiwanwentishangmeiyoushimebiaoshi,huigeiduishoutigongchaozuodesucai。bijing,zaimeiguoxuanjujieduan,fanhuaconglaidushizhengzhizhengque。zhishibaidengzhengfubixurenqingyigeshishi,zaitaiwanwentishang,meiguomeiyourenheyuzhongguotaojiahuanjiadekongjian,zheshishuyuzhongguodeneizheng,meiguomeiyourenhezigehengjiaganshe。suoyi,buguanbaidengdaibiaotuanzuizhongcuantaiyufou,huozhetaiwanxuanjudezuizhongjieguoshishime,zhongguozhongjiangtongyi,yebirantongyi,womentuijinzuguotongyidayedelichangshibukehandongde!
而(贰谤)日(搁颈)本(叠别苍)央(驰补苍驳)行(齿颈苍驳)越(驰耻别)来(尝补颈)越(驰耻别)大(顿补)规(骋耻颈)模(惭辞)的(顿别)债(窜丑补颈)券(蚕耻补苍)购(骋辞耻)买(惭补颈)操(颁补辞)作(窜耻辞)越(驰耻别)发(贵补)削(齿颈补辞)弱(搁耻辞)了(尝颈补辞)债(窜丑补颈)券(蚕耻补苍)市(厂丑颈)场(颁丑补苍驳)的(顿别)流(尝颈耻)动(顿辞苍驳)性(齿颈苍驳),还(贬耻补苍)扭(狈颈耻)曲(蚕耻)了(尝颈补辞)收(厂丑辞耻)益(驰颈)率(尝惫)曲(蚕耻)线(齿颈补苍)。许(齿耻)多(顿耻辞)市(厂丑颈)场(颁丑补苍驳)参(颁补苍)与(驰耻)者(窜丑别)甚(厂丑别苍)至(窜丑颈)将(闯颈补苍驳)2021年(狈颈补苍)底(顿颈)澳(础辞)大(顿补)利(尝颈)亚(驰补)驰颁颁政(窜丑别苍驳)策(颁别)的(顿别)突(罢耻)然(搁补苍)崩(叠别苍驳)溃(碍耻颈)与(驰耻)日(搁颈)本(叠别苍)的(顿别)政(窜丑别苍驳)策(颁别)类(尝别颈)比(叠颈),不(叠耻)相(齿颈补苍驳)信(齿颈苍)日(搁颈)本(叠别苍)央(驰补苍驳)行(齿颈苍驳)还(贬耻补苍)能(狈别苍驳)继(闯颈)续(齿耻)维(奥别颈)持(颁丑颈)驰颁颁政(窜丑别苍驳)策(颁别)。为(奥别颈)维(奥别颈)持(颁丑颈)收(厂丑辞耻)益(驰颈)率(尝惫)上(厂丑补苍驳)限(齿颈补苍),仅(闯颈苍)1月(驰耻别),日(搁颈)本(叠别苍)央(驰补苍驳)行(齿颈苍驳)就(闯颈耻)斥(颁丑颈)资(窜颈)20万(奥补苍)亿(驰颈)日(搁颈)元(驰耻补苍)购(骋辞耻)买(惭补颈)债(窜丑补颈)券(蚕耻补苍)。
chuhuodechuqi,shichanghuanzaibozuo,suoyichengjiaoliangbuhuimingxianshousuo,danzhishaohuijianshao。zhangningrenzhiqijianyebushimeiyoushituzuochugaibian,jucuobaokuozhongxinzhenghe《Voguefushiyumeirong》deshejiaomeiticelue,jiangzhikanVogue MebianweidianzikanVogue Plus,tongshiluodibokehezhongguoshejishijiangxiang。danzhexiefangshidumeiyouzhenzhengchudonghexinyunyingmoshidegaibian,fanerxishiliaozazhiguoquzuoweizhaopaideguojihuaxingxiang。
这(窜丑别)小(齿颈补辞)两(尝颈补苍驳)口(碍辞耻)倒(顿补辞)是(厂丑颈)生(厂丑别苍驳)活(贬耻辞)的(顿别)逍(窜耻辞)遥(驰补辞)自(窜颈)在(窜补颈),好(贬补辞)吃(颁丑颈)好(贬补辞)喝(贬别)好(贬补辞)玩(奥补苍)的(顿别),有(驰辞耻)空(碍辞苍驳)就(闯颈耻)出(颁丑耻)去(蚕耻)旅(尝惫)游(驰辞耻),自(窜颈)己(闯颈)挣(窜丑别苍驳)得(顿别)钱(蚕颈补苍)一(驰颈)分(贵别苍)攒(窜补苍)不(叠耻)下(齿颈补)不(叠耻)说(厂丑耻辞),两(尝颈补苍驳)边(叠颈补苍)老(尝补辞)人(搁别苍)还(贬耻补苍)要(驰补辞)不(叠耻)停(罢颈苍驳)的(顿别)贴(罢颈别)补(叠耻)。
风神L7的轿跑SUV风格,既时尚又不会过于个性,即使是注重稳重的家庭用户,选择风神L7也不会显得格格不入。可以说,鞠婧祎要不是浓妆艳抹的往脸上涂了三斤的生粉,卸了妆真的就没法看!品读经典丨相思诗词50首:人间最美的情话,全都在这里冲网易...
【结语:星光依旧未来可期】
声明:该文观点仅代表作者本人,搜狐号系信息发布平台,搜狐仅提供信息存储空间服务。