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变电站直流毛病缘由及避免

三月 28, 2015,

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均匀: 3.5 (2 票)

    1. 变电直流是供操纵、掩护、灯光旌旗灯号、照明和通信等装备利用,应有杰出的电压品质和充足的输入容量及运转不变情况。直流电源在额外参数下不变运转和其回路的无缺,是保障变电站一般操纵和掩护装配准确举措的须要前提。在体系产生毛病时,伴有直流电源和回路毛病,将使掩护装配不能准确举措,开关不能跳合,形成或扩展变乱。

 

1.1 操(cao)纵电(dian)(dian)(dian)源装备(bei)毛病缘(yuan)由为:一是蓄电(dian)(dian)(dian)池(chi)掩(yan)护不(bu)(bu)妥(tuo),充电(dian)(dian)(dian)缺乏,容(rong)量(liang)降落,在(zai)变乱(luan)中直流电(dian)(dian)(dian)压敏捷降落,致(zhi)使(shi)掩(yan)护开关不(bu)(bu)能(neng)一般举措,扩展变乱(luan);二是电(dian)(dian)(dian)池(chi)容(rong)量(liang)缺乏,在(zai)统一时(shi)辰多条线路毛病时(shi),开关不(bu)(bu)能(neng)靠得住举措,切除毛病,致(zhi)使(shi)越级跳(tiao)闸(zha);三(san)是电(dian)(dian)(dian)源装配毛病,处置时(shi)宁静(jing)办法不(bu)(bu)力,引发掩(yan)护装配出口跳(tiao)闸(zha)

 

1.2 直流节制回路(lu)和直流旌旗灯号(hao)回路(lu)、直流操(cao)纵(zong)回路(lu)混在一路(lu),致使加入旌旗灯号(hao)电(dian)源(yuan)时,掩护(hu)跳闸。 

 

  2.1运转(zhuan)不妥的首要缘由是(shi): 

 

   2.1.1 运转职员不熟(shu)习(xi)直(zhi)流装(zhuang)备(bei)、回路,也不熟(shu)习(xi)运转规(gui)程,操(cao)纵(zong)有(you)关电(dian)源装(zhuang)备(bei)时,不做(zuo)好(hao)宁静办法,形成掩护开关跳(tiao)闸; 

 

   2.1.2 对蓄电(dian)(dian)池查抄不细,掩护不够(gou),充放(fang)电(dian)(dian)不一(yi)(yi)般(ban),致(zhi)使运转时(shi)容(rong)量降(jiang)落,电(dian)(dian)压(ya)缺乏(fa),在体(ti)系产生毛病时(shi),掩护不能一(yi)(yi)般(ban)举措,开关不能跳闸; 

 

   2.1.3 投入熔(rong)(rong)断(duan)器(qi)(qi)前,不(bu)查抄熔(rong)(rong)断(duan)座与熔(rong)(rong)断(duan)器(qi)(qi)是不(bu)是靠得住,致(zhi)使(shi)局(ju)部熔(rong)(rong)断(duan)器(qi)(qi)打仗(zhang)不(bu)良,压降过大。 

 

    3 避免变乱对策 

 

    3.1 应增强直(zhi)(zhi)流电源和(he)回(hui)路(lu)的(de)全(quan)进程(cheng)办(ban)理(li),强化设想(xiang)、装配调试、运转掩(yan)护(hu)(hu)职员的(de)义务(wu)心。从设想(xiang)施工(gong)到变电站的(de)直(zhi)(zhi)流革(ge)新任务(wu),必须严(yan)酷履行《电力(li)体系继电掩(yan)护(hu)(hu)及宁静(jing)主动装配反变乱办(ban)法(fa)要(yao)点》和(he)有(you)关设想(xiang)规程(cheng)的(de)请求(qiu)。直(zhi)(zhi)流电源容量的(de)挑选要(yao)知足(zu)变乱时最大打击(ji)负(fu)荷的(de)请求(qiu)。直(zhi)(zhi)流熔断器(qi)与相干(gan)回(hui)路(lu)设置装备摆(bai)设应知足(zu)的(de)根基请求(qiu)是(shi):消弭寄(ji)生回(hui)路(lu),增添掩(yan)护(hu)(hu)功效(xiao)冗(rong)余度。 

 

    3.2 直流熔(rong)断器(qi)按一(yi)般负荷与掩护举措时打击负荷巨细来设置装备摆设,上(shang)、上(shang)级之间必须有(you)共(gong)同干(gan)(gan)系,知足挑选性请(qing)求。主动小(xiao)开关与熔(rong)断器(qi)共(gong)同干(gan)(gan)系要(yao)经实验肯定(ding),熔(rong)断器(qi)之间的(de)共(gong)同岂但要(yao)知足幅值干(gan)(gan)系,也要(yao)知足时候(hou)干(gan)(gan)系(差别型号熔(rong)断器(qi)的(de)熔(rong)断时候(hou)特(te)征差别)。 

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