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【电气人必知】40个电气二次问题汇总

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【电气人必知】40个电气二次问题汇总

发布日期:2016/6/12 15:30:02 来源:河南华商电气设备有限公司

1、计算机构成保护与原有继电保护有何区别?

斗地主技巧 ZHUYAOQUBIEZAIYUYUANYOUDEBAOHUSHURUSHIDIANLIU、DIANYAXINHAO,ZHIJIEZAIMONILIANGZHIJIANJINXINGBIJIAOCHULI,SHIMONILIANGYUZHUANGZHIZHONGJIDINGZULIJUJINXINGBIJIAOCHULI。ERJISUANJIZHINENGZUOSHUZIYUNSUANHUOLUOJIYUNSUAN。YINCI,SHOUXIANYAOQIUJIANGSHURUDEMONILIANGDIANLIU、DIANYADESHUNJIANZHIBIANHUANWEILISANDESHUZILIANG,RANHOUCAINENGSONGJISUANJIDEZHONGYANGCHULIQI,ANGUIDINGSUANFAHECHENGXUJINXINGYUNSUAN,QIEJIANGYUNSUANJIEGUOSUISHIYUJIDINGDESHUZIJINXINGBIJIAO,ZUIHOUZUOCHUSHIFOUTIAOZHADEPANDUAN。


2、零序电流保护的各段保护范围是如何划分的?

LINGXUDIANLIUIDUANDUOGUOBENXIANLUMODUANJIEDIDUANLULIUJINGBAOHUDEZUIDALINGXUDIANLIUZHENGDING;BUNENGBAOHUXIANLUDEQUANZHANG,DANBUYINGXIAOYUBEIBAOHUXIANLUQUANZHANGDE15%~20%;LINGXUIIDUANYIBANBAOHUXIANLUDEQUANZHANG,BINGYANSHENDAOXIANGLINXIANLUDEIDUANFANWEINEI,BINGYUZHIPEIHE。LINGXUIIIDUANSHII,IIDUANDEHOUBEIDUAN,BINGYUXIANGLINXIANLUPEIHE。


3、什么是重合闸的后加速?

DANGXIANLUFASHENGGUZHANGSHI,BAOHUANZHENGDINGZHIDONGZUO,XIANLUKAIGUANDUANKAI,ZHONGHEZHAMASHANGDONGZUO。RUOSHISHUNSHIXINGGUZHANG,ZAIXIANLUKAIGUANDUANKAIHOU,GUZHANGXIAOSHI,ZHONGHECHENGGONG,XIANLUHUIFUGONGDIAN;RUOSHIYONGJIUXINGGUZHANG,ZHONGHEHOU,BAOHUSHIJIANYUANJIANBEITUICHU,SHIQIBIANWEI0MIAOTIAOZHA,ZHEIBIANSHIZHONGHEZHADONGZUOHOUGUZHANGWEIXIAOSHIJIASUTIAOZHA,TIAOZHAQIECHUGUZHANGDIAN。


4、  错误操作隔离开关后应如何处理?

(1)CUOLAGELIKAIGUANSHI,DAOZHAGANGLIKAIJINGCHUTOUBIANFASHENGDIANHU,ZHEISHILIJIHESHANG,JIUKEYIXIAOHU,BIMIANSHIGU,RUODAOZHAYIQUANBULAKAI,ZEBUXUJIANGWULADEDAOZHAZAIHESHANG;(2)CUOLAGELIKAIGUANSHI,JISHIHECUO,SHENZHIZAIHEZHASHIFASHENGDIANHU,YEBUZHUNZAILAKAI,YINWEIDAIFUHEDAOZHAHUIZAOCHENGSANXIANGHUGUANGDUANLU。


5、什么叫R、L、C并联谐振?

DIANZU、DIANGANHEDIANRONGXIANGBINGLIANDEDIANLU,ZAIYIDINGPINLVDEZHENGXIANDIANYUANZUOYONGXIA,CHUXIANDIANLUDUANDIANYAHEZONGDIANLIUTONGXIANG,ZHENGGEDIANLUCHENGZUXINGDETESHUZHUANGTAI,ZHEIGEZHUANGTAIJIAOBINGLIANXIEZHEN。


6、距离保护的起动元件采用负序、零序增量元件有何有点?

斗地主技巧 (1)LINGMINDUGAO;(2)KEJIANZUOZHENDANGBISUOZHUANGZHIDEQIDONGYUANJIAN;(3)ZAIDIANYAERCIHUILUDUANXIANSHIBUHUIWUDONG;(4)DUICHENGFENLIANGDECHUXIANYUGUZHANGDEXIANGBIEWUGUAN,GUQIDONGYUANJIANKECAIYONGDANGEJIDIANQI,YINCIBIJIAOJIANDAN。


7、保护装置符合哪些条件可评定位一类设备?

YILEISHEBEIDESUOYOUBAOHUZHUANGZHI,QIJISHUZHUANGKUANGLIANGHAO,XINGNENGWANQUANMANZUXITONGANQUANYUNXINGYAOQIU,BINGFUHEYIXIAZHUYAOTIAOJIAN:(1)BAOHUPING、JIDIANQI、YUANJIAN、FUSHUSHEBEIJIERCIHUILUWUQUEXIAN。(2)ZHUANGZHIDEYUANLI、JIEXIANJIDINGZHIZHENGQUE,FUHEYOUGUANGUIDING、TIAOLIDEGUIDINGJIFANSHIGUCUOSHIQIU。(3)TUZHIZILIAOQIQUAN,FUHESHIJI。(4)YUNXINGTIAOJIANLIANGHAO。


8、对控制开关的检查项目及其内容有哪些?

DUIKONGZHIKAIGUANDEJIANCHANEIRONGYOU:(1)WAIQIAOQINGJIEWUYOUGOU,WANZHENGWUSUN。(2)ANZHUANGYINGLAOGU,CAOZUOSHIBUHUODONG。(3)MIFENGGAIMIFENGLIANGHAO。(4)GEJIEXIANTOULIANJIEYINGLAOGU,BUSONGDONG,BUXIUSHI。(5)ZHUANDONGLINGHUO,WEIZHIZHENGQUE,JIECHULIANGHAO。(6)DAKAIMIFENGGAI,YONGSHOUDIANTONGZHAOZHEJIANCHA,NEIBUYINGQINGJIE,RUNHUAYOUZHIBUGANZAO,JIECHUDIANWUSHAOSUN。YONGJUEYUANGUNSHIYACHUPIAN,YALIYINGLIANGHAO。


9、变压器差动保护在变压器空载投入时民营检查哪些内容?

BIANYAQIDECHADONGBAOHU,ZAIXINANZHUANGSHIBIXUJIANGBIANYAQIZAIEDINGDIANYAXIAZUO5CIKONGZAISHIYAN。ZAIZUOKONGZAITOURUZHIQIAN,YINGDUIERCIJIEXIANJINXINGJIANCHA,BINGQUEBAOZHENGQUEWUWU。KONGZAITOURUSHIYANYINGZAIBIANYAQIDEDADIANYUANCEHEDIYACEJINXING,ZHEISHIYINWEIXITONGZUKANGJIBIANYAQIELOUKANGNENGQIXIANZHILICIYONGLIUDEZUOYONG,ERDADIANYUANCEXITONGZUKANGXIAO,QIEYIBANBIANYAQIDIYARAOZURAOZAILIMIAN,LOUKANGJIAOXIAO,GUZAIDADIANYUANHEDIYACETOURUSHIYONGLIUJIAODA。ZAISHIYANZHONG,BAOHUZHUANGZHIYICIYEBUYINGDONGZUO,FOUZEYINGZENGDAJIDIANQIDEDONGZUODIANLIU。


10、在拆动二次线时,应采取哪些措施?

斗地主技巧 CHAIDONGERCIXIANSHI,BIXUZUOHAOJILU;HUIFUSHI。YINGJIZAIJILUBENSHANGZHUXIAO。ERCIXIANGAIDONGJIAODUOSHI,YINGZAIMEIGEXIANTOUSHANGSHUANPAI。CHAIDONGHUOFUSHEERCIDIANLANSHI,YINGHAIZAIDIANLANDESHOUMODUANJIQIYANXIANDEZHUANWANCHUHEJIAOCHAYUANJIANCHUSHUANPAI


11、瓦斯保护的反事故措施要求是什么?

斗地主技巧 (1)JIANGWASIJIDIANQIDEXIAFUTONGGAIDANGBANSHI,JIEDIANGAIWEILISHI,YITIGAOZHONGWASIDONGZUODEKEKAOXING。(2)WEIFANGZHIWASIJIDIANQIYINLOUSHUIDUANLU,YINGZAIQIDUANBUHEDIANLANYINXIANDUANZIXIANGNEIDEDUANZISHANGCAIQUFANGYUCUOSHI。(3)WASIJIDIANQIYINCHUXIANYINGCAIYONGFANGYOUXIAN。(4)EASHIJIDIANQIDEYINCHUXIANHEDIANLANXIANYINGFENBIELIANJIEZAIDIANLANYINXIANDUANZIXIANGNEIDEDUANZISHANG。


12、变压器保护装设的一般原则是什么?

斗地主技巧 (1)FANGYUBIANYAQITIEQIAONEIBUDUANLUHEYOUMIANJIANGDIDEWASIBAOHU。(2)FANGYUBIANYAQIXIANQUANJIYINCHUXIANDEXIANGJIANDUANLU,DAJIEDIDIANLIUDIANWANGCEXIANQUANYINCHUCEDEJIEDIDUANLUYIJIXIANQUANZAJIANDUANLUDEZONGLIANCHADONGBAOHUHUODIANLIUSUDUANBAOHU。(3)FANGYUBIANYAQIWAIBUDEXIANGJIANDUANLUBINGZUOWASIBAOHUHEZONGLIANCHADONGBAOHUHOUBEIDEGUODIANLIUBAOHU(HUOZHEFUHEDIANYAQIDONGDEGUODIANLIUBAOHU、HUOFUXUDIANLIUBAOHU)。(4)FANGYUDAJIEDIDIANLIUDIANWANGZHONGWAIBUJIEDIDUANLUDELINGXUDIANLIUBAOHU。(5)FANGYUDUICHENGGUOFUHEDEGUOFUHEBAOHU。


13、距离保护的起动元件有什么作用?

(1)DUANLUGUZHANGSHI,XUNSUQIDONGBAOHUZHUANGZHI;(2)QIDONGZHENDANGBISUOZHUANGZHI,HUOJIANZUODIIIIDUANDECELIANGYUANJIAN;(3)JINXINGDUANBIEQIEHUAN;(4)JINXINGXIANGBIEQIEHUAN;(5)ZAIJINGTIGUANBAOHUZHONG,RUGUOZHILIULUOJIBUFENFASHENGGUZHANG,BISUOZHENGTAOBAOHU。


14、10千伏输电线路一般装设什么保护?

(1)XIANGJIANDUANLUBAOHU:DANDIANYUANXIANLUYIBANZHUANGSHELIANGDUANSHIGUODIANLIUBAOHU,JIDIANLIUSUDUANBAOHU,DINGSHIXIANGUODIANLIUBAOHU。SHUANGDIANYUANXIANLUYIBANZHUANGSHEDAIFANGXIANGHUOBUDAIFANGXIANGDEDIANLIUSUDUBAOHUHEGUODIANLIUSUDUANBAOHU。(2)JIEDIBAOHU:YIBANZHUANGSHEWUXUANZEXINGJUEYUANJIANCHABAOHU、LINGXUGUODIANYABAOHU、GONGLVFANGXIANGBAOHU。


15、负反馈对放大器的工作性能的影响是什么?

斗地主技巧 (1)JIANGDIFANGDABEISHU,(2)TIGAOFANGDABEISHUDEWENDINGXING,(3)GAIJINBOXINGSHIZHEN,(4)ZHANKUANTONGPINDAI,(5)GAIBIANFANGDAQIDESHURUYUSHUCHUDIANZU。


16、非正弦电流产生的原因是什么?

FEIZHENGXIANDIANLIUDECHANSHENG,KEYISHIDIANYUAN,YEKEYISHIFUZAI。TONGCHANGYOUXIALIEYUANYIN:(1)DIANLUZHONGYOUJIGEBUTONGDEZHENGXIANDIANDONGSHITONGSHIZUOYONG,HUOJIAOLIUYUZHILIUDIANDONGSHIGONGTONGZUOYONG,(2)DIANLUZHONGJUYOUFEIZHENGXIANZHOUQIDIANDONGSHI。(3)DIANLUZHONGYOUFEIXIANXINGYUANJIAN。


17、6~35kV电力系统中的避雷器接在相对地电压上,为什么避雷器要按额定线电压选择?

6~35kVXITONGSHIXIAOJIEDIDUANLUDIANLIUXITONG,ZAIZHENGCHANGQINGKUANGXIA,BILEIQICHUYUXIANGDUIDIDIANYADEZUOYONGXIA,DANFASHENGDANXIANGJIEDIGUZHANGSHI,FEIGUZHANGXIANGDEDUIDIDIANYAJIUSHANGSHENGDAOXIANDIANYA,ERZHEIZHONGJIEDIGUZHANGYUNXUDUANSHIJIANNEICUNZAI,CISHIBILEIQIBUYINGDONGZUO。SUOYI,BILEIQIDEEDINGDIANYABIXUXUANYONGXITONGDEEDINGXIANDIANYAERBUSHIEDINGXIANGDIANYA。


18、保护装置符合哪些条件可评定为是三类设备?

斗地主技巧 SANLEISHEBEIDEBAOHUZHUANGZHIHUOSHIPEIBEIBUQUAN,HUOJISHUXINGNENGBULIANG,YINERYINGXIANGXITONGANQUANYUNXING。RUGUO,ZHUYAOBAOHUZHUANGZHIYOUXIALIEQINGKUANGZHIYISHI,YIPINGWEISANLEISHEBEI:(1)BAOHUWEIMANZUXITONGYAOQIU,ZAIGUZHANGSHINENGYINQIXITONGZHENDANG,WAJIESHIGUHUOYANZHONGSUNHUAIZHUYAODIANSHEBEIZHE。(2)WEIMANZUFANSHIGUCUOSHIYAOQIU。(3)GONGYUNXINGRENYUANCAOZUODELIANJIEPIAN、BASHOU、ANNIUDENGSHEYOUBIAOZHI。(4)TUZHIBUQUAN,QIEBUFUHESHIJI,(5)GUZHANGLUBOQIBUNENGWANHAOLUBOHUOWEITOURUYUNXING。


19、在对继电器试验时,如何掌握试验环境条件?

SHIYANHUANJINGTIAOJIANYAOQIUBAOKUOWENDU、XIANGDUISHIDU、HEQIYASANGEFANGMIAN。ZHEIXIETIAOJIANBUJINYINGXIANGBEISHIJIDIANQIDEJIBENXINGNENG,ERQIEDUICESHIYIQISHEBEIGONGZUOZHUANGTAIYEYOUYINGXIANG。DUISHIYANHUANJINGTIAOJIANYAOQIURUXIA:(1)WENDU:15~35DU(2)SHIDU:45~75%   (3)QIYA:660~780mmHg


20、在选择试验仪表时,要掌握哪些原则?

(1)GENJUBEICELIANGDUIXIANGXUANZEYIBIAODELEIXING。SHOUXIANGENJUBEICEJIDIANQISHIZHILIUHAISHIJIAOLIU,XUANYONGZHILIUYIBIAOHUOJIAOLIUYIBIAO。

(2)GENJUSHIYANXIANLUHEBEICEJIDIANQIXIANQUANZUKANGDEDAXIAOXUANZEYIBIAODENEIZU。(3)GENJUBEICEDEDAXIAOXUANYONGSHIDANGDEYIBIAO。

斗地主技巧 (4)GENJUSHIYONGDECHANGSUOJIGONGZUOTIAOJIANXUANZEYIBIAO。


21、新安装的保护装置竣工后,其主要验收项目有哪些?

YANSHOUXIANGMURUXIA:(1)DIANQISHEBEIJIXIANLUYOUGUANSHICECANSHUWANZHENG、ZHENGQUE。(2)QUANBUBAOHUZHUANGZHIJUNGONGTUZHIFUHESHIJI。(3)JIANYANDINGZHIFUHEZHENGDINGTONGZHIDANDEYAOQIU。

斗地主技巧 (4)JIANYANXIANGMUJIJIEGUOFUHEJIANYANJIANYANTIAOLIHEYOUGUANGUICHENGDEGUIDING。(5)HEDUIDIANLIUHUGANQIBIANBIJIFUANTEXING,QIERCIFUZAIMANZUWUCHAYAOQIU。(6)JIANCHAPINGQIAN、PINGHOUDESHEBEIZHENGQI,WANHAO,HUILUJUEYUANLIANGHAO,BIAOZHIQIQUANZHENGQUE。(7)YONGYICIFUHEDIANLIUHEGONGZUODIANYAJINXINGYANSHOUSHIYAN,PANDUANHUGANQIJIXING,BIANBIJIQIHUILUDEZHENGQUEXING,PANDUANFANGXIANG,CHADONG,JULI,GAOPINDENGBAOHUZHUANGZHIYOUGUANYUANJIANJIJIEXIANDEZHENGQUEXING。


22、在正常运行怎样检验大接地电流系统零序方向保护的零序电压回路?

斗地主技巧 WEIBAOZHENGLINGXUFANGXIANGBAOHUZHENGQUEDONGZUO,YINGDUILINGXUFANGXIANGBAOHUDELINGXUDIANYAHUILUJINXINGWANZHENGXINGJIANCHA。QIFANGFASHILIYONGYOUDIANYAHUGANQIKAIKOUSANJIAOXINGJIEXIANDEERCIRAOZUZHONGYINCHUDESHIYANXIAOMUXIANDUIGONGGETAOLINGXUFANGXIANGBAOHUDEDIANYAXIAOMUXIANYMNCELIANGDIANYAJUNWEI100V,JIWEIZHENGCHANG。


23、在小接地电流系统辐射形电网中发生单相接地故障时,故障线路与非故障线路的电流有何不同?

GUZHANGXIANLUSONGDUANCEDELINGXUDIANRONGDIANLIU,DENGYUQITAXIANLULINGXUDIANRONGDIANLIUZHIHE,QIELIUXIANGMUXIAN。FEIGUZHANGXIANLUSONGDUANCEDELINGXUDIANLIUJIWEIBENXIANLUDEFEIGUZHANGXIANGDUIDIDIANRONGDIANLIU,QIELIUCHUMUXIAN。


24、在大接地电流系统中,为什么相间保护动作的时限比零序保护的动作时限长?

斗地主技巧 BAOHUDEDONGZUOSHIXIANYIBANSHIANJIETIXINGYUANZEZHENGDINGDE。XIANGJIANBAOHUDEDONGZUOSHIXIAN,SHIYOUYONGHUDAODIANYUANFANGXIANGMEIJIBAOHUDIZENGYIGESHIXIANJICHAGOUCHENGDE,ERLINGXUBAOHUZEYOUYUJIANGYABIANYAQIDADOUSHIY/  JIEXIAN,DANGDIYACEJIEDIDUANLUSHI,GAOYACEWULINGXUDIANLIU,QIDONGZUOSHIXIANBUXUYAOYUBIANYAQIDIYAYONGHUXIANGPEIHE。SUOYILINGXUBAOHUDEDONGZUOSHIXIANBIXIANGJIANBAOHUDEDUAN。


25、什么是电力系统振荡?引起振荡的原因一般有哪些?

BINGLIEYUNXINGDELIANGGEXITONGHUOFADIANCHANGSHIQUTONGBUDEXIANXIANGCHENGWEIZHENDANG。YINQIZHENDANGDEYUANYINJIAODUO,DADUOSHUSHIYOUYUQIECHUGUZHANGSHIJIANGUOZHANGERYINQIXITONGDONGTAIWENDINGDEPOHUAI,ZAILIANXIBORUODEXITONGZHONGYEKENENGYOUYUWUCAOZUO,FADIANJISHICIHUOGUZHANGTIAOZHA、DUANGONGMOUYIXIANLUHUOSHEBEIERZAOCHENGZHENDANG。


26、调制器应满足哪几项要求?

斗地主技巧 (1)DANGSHURUZHILIUXINHAOUi=0SHI,SHUCHUXINHAOU0=0 (2)SHUCHUJIAOLIUXINHAODEFUZHI,YINGBILIYUZHILIUXINHAODEDAXIAO(3)DANGZHILIUXINHAOUiDEJIXINGGAIBIANSHI,SHUCHUJIAOLIUXINHAODEXIANGWEIYESUIZHIGAIBIAN。


27、35kV中性点不接地电网中,线路相间短路保护配置的原则是什么?

斗地主技巧 XIANGJIANDUANLUBAOHUPEIZHIDEYUANZESHI:(1)DANGCAIYONGLIANGXIANGSHIDIANLIUBAOHUSHI,DIANLIUHUGANQIYINGANZHUANGZAIGECHUXIANTONGMINGLIANGXIANGSHANG(LIRUA,CXIANG)。(2)BAOHUZHUANGZHIBAOHUZHUANGZHIYINGCAIYONGYUANHOUBEIFANGSHI。(3)RUXIANLUDUANLUHUISHIFADIANCHANGCHANGYONGMUXIAN、ZHUYAODIANYUANDELIANLUODIANMUXIANHUOZHONGYAOYONGHUMUXIANDEDIANYADIYUEDINGDIANYADE50%~60%SHIYINGKUAISUQIECHUGUZHANG。


28、在高压电网中,高频保护的作用是什么?

GAOPINBAOHUZUOYONGZAIYUANJULIGAOYASHUDIANXIANLUSHANG,DUIBEIBAOHUXIANLURENYIDIANGELEIGUZHANGJUNNENGSHUNSHIYOULIANGCEQIECHU,CONGERNENGTIGAODIANLIXITONGYUNXINGDEWENDINGXINGHEZHONGHEZHADECHENGGONGLV。


29、大接地电流系统中,为什么相间保护动作的时限比零序保护的动作时限长?

BAOHUDEDONGZUOSHIXIANYIBANSHIANJIETIXINGYUANZEZHENGDINGDE。XIANGJIANBAOHUDEDONGZUOSHIXIANSHIYOUYONGHUDAODIANYUANFANGXIANGMEIJIBAOHUDIZENGYIGESHIXIANCHAGOUCHENGDE,ERLINGXUBAOHUZEYOUYUJIANGYABIANYAQIDADOUSHIY,d11JIEXIAN,DANGDIYACEJIEDIDUANLUSHI,GAOYACEWULINGXUDIANLIU,QIDONGZUOSHIXIANBUXUYAOYUBIANYAQIDIYAYONGHUPEIHE。SUOYILINGXUBAOHUDEDONGZUOSHIXIANBIXIANGJIANBAOHUDEDUAN。


30、对运算放大器的基本要求是什么?

(1)输入端外接阻抗与反馈电路阻抗数值应精确、稳定;(2)开环电压放大倍数应足够大;(3)开环输入电阻r i 要足够大(4)开环输出电阻要小;(5)零点漂移和噪声要小。


31、什么是放大器输出电阻?

ZAIFANGDAQISHUCHUDUAN,KEYIBAFANGDAQIKANZUOJUYOUYIDINGNEIZUDEXINHAOYUAN,ZHEIGENEIZUJIUSHISHUCHUDIANZU。


32、使用叠加原理计算线性电路应注意哪项事项?

斗地主技巧 YINGYONGDIEJIAYUANLIKEYIFENBIEJISUANGEGEDIANYAYUANHEDIANLIUYUANDANDUZUOYONGXIAGEZHILUDEDIANYAHEDIANLIU,RANHOUDIEJIAYUANLIJIAQILAI,ZAIYINGYONGDIEJIAYUANLISHIYINGZHUYI(1)GAIYUANLIZHINENGYONGLAIJISUANXIANXINGDIANLIUHEDIANYA,DUIFEIXIANXINGDIANLUBUSHIYONG(2)JINXINGDIEJIASHIYAOZHUYIDIANLIUHEDIANYADEFANGXIANG,DIEJIASHIQUDAISHUHE(3)DIANLULIANJIEFANGSHIJIDIANLUZHONGDEGEDIANZUDEDAXIAODOUBUNENGBIANDONG。DIANLIUYUANZUOYONGSHI,DIANYAYUANDUANLU,DIANYAYUANZUOYONGSHI,DIANLIUYUANKAILU。(4)DIEJIAYUANLIZHISHIYONGYUDUIDIANYAHEDIANLIUDEDIEJIA,ERGONGLVBUNENGYONGDIEJIAYUANLILAIJISUAN。


33、水轮发电机为什么要设置过电压保护?

YOUYUSHUILUNJIDIAOSUXITONGDIAOJIEHUANMAN,ZAISHIGUSHUAIFUHEHOU,RONGYICHUXIANBUYINXUDEGUODIANYA,SUOYIGUIDINGYAOSHEZHIGUODIANYABAOHU。


34、什么叫发电机低励及发电机失磁?

斗地主技巧 DILISHIBIAOSHIFADIANJILICIDIANLIUDIYUJINGWENDINGJIXIANSUODUIYINGDELICIDIANLIU。SHICISHIZHIFADIANJISHIQULICIDIANLIU。


35、为什么发电机要装设负荷电压其动的过电流保护?为什么这种保护要使用发电机中性点处的电流互感器?

ZHEISHIWEILEZUOWEIFADIANJICHADONGBAOHUHUOXIAYIGEYUANJIANDEHOUBEIBAOHUERSHEZHIDE,DANGCHUXIANXIALIELIANGGUZHANGSHIQIZUOYONG:(1)DANGWAIBUDUANLU,GUZHANGYUANJIANDEBAOHUZHUANGZHIHUOJIDIANQIJUJUEDONGZUOSHI;(2)ZAIFADIANJICHADONGBAOHUFANWEINEIGUZHANGERCHADONGBAOHUJUJUEDONGZUOSHI。


36、变压器复合电压起动过电流保护的负序电压定值一般按什么原则整定的?为什么?

XITONGZHENGCHANGYUNXINGSHI,SANXIANGDIANYAJIBENSHANGSHIZHENGXUFENLIANG,FUXUFENLIANGHENXIAO,GUFUXUDIANYAYUANJIANDEDINGZHIANZHENGCHANGYUNXINGSHIFUXUDIANYALVGUOQIDESHUCHUBUPINGHENGDIANYAZHENGDING,YIBANQU6~12V(ERCIDIANYAZHI)


37、为什么有些大容量的变压器及系统联络变压器用负序电流和单相式低压起动的过电流保护作为后备保护。

YINWEIZHEIZHONGBAOHUJUYOURUXIAYOUDIAN:(1)ZAIFASHENGBUDUICHENGDUANLUSHI,QILINGMINDUGAO;(2)ZAIBIANYAQIHOUFASHENGBUDUICHENGDUANLUSHI,QILINGMINDUYUBIANYAQIDEJIEXIANFANGSHIWUGUAN。


38、中间继电器在继电保护中其何作用?

(1)BAOHUZHUANGZHIZHONGDECELIANGYUANJIANDECHUDIANYIBANHENXIAO,SHULIANGYESHAO,TONGGUOZHONGJIANJIDIANQIKEZENGJIACHUDIANRONGLIANGHESHULIANG;(2)DANGXIANLUSHANGZHUANGYOUGUANXINGBILEIQISHI,LIYONGZHONGJIANJIDIANQIKEQUDEBAOHUZHUANGZHIDONGZUODEYANSHI,YIFANGBILEIQIFANGDIANSHIYINQIDESUDONGBAOHUWUDONGZUO;(3)MANZUBAOHULUOJIHUILUDEXUYAO。


39、电磁型电流继电器与电压继电器工作条件有什么区别?

DIANYAJIDIANQIYIBANJIEYUDIANYAHUGANQIERCICE,YUDIANLIUHUGANQIXIANGBIJIAO,YOUYUDIANYAGAO,SUOYIJIDIANQI

XIANQUANZASHUDUO、DAOXIANXI、ZUKANGDA,QIEXIANQUANDEDIANKANGZENGDA,YIZHIDIANLIUJIANXIAO;LINGYIFANGMIANSHICILUCIKANGJIANXIAO,ERDIANLIUDEJIANXIAOHEZUKANGDEJIANXIAOHUXIANGBUCHANG,SHIJIDIANQIZAIDONGZUOGUOCHENGZHONGDIANCILIJUBUBIAN,SHIQUJIDIANTEXING。


40、为何说距离保护的保护区基本不受系统运行方变化的影响?

YINWEIJULIBAOHUSHILIYONGXIANLUDESHIDUANDIANYAYUDIANLIUDEBIZHIZUOWEIPANJUGOUCHENGBAOHU,YOUYUDUANLUZUKANGZHISUIDUANLUDIANJUXIANLUSHIDUANDEYUANJINERBIANHUA,GUBAOHUDEBAOHUQUJIBENBUSHOUXITONGDEYUNXINGFANGSHIBIANHUADEYINGXIANG。

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