茄子视频APP官网

施能百科

電力直流屏電池和充電系統的選擇

2019/6/10 14:32:13??????點擊:
電(dian)(dian)(dian)(dian)(dian)(dian)力直(zhi)(zhi)流(liu)屏(ping)(ping)是高壓配電(dian)(dian)(dian)(dian)(dian)(dian)設備(bei)(bei),是整個配電(dian)(dian)(dian)(dian)(dian)(dian)室的(de)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)系(xi)(xi)統,有時候也(ye)可以根據情況(kuang)配合交(jiao)流(liu)屏(ping)(ping)使用,組成交(jiao)直(zhi)(zhi)流(liu)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)系(xi)(xi)統。直(zhi)(zhi)流(liu)屏(ping)(ping)主要應(ying)用于大型水力、火力發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)廠(chang),各類(lei)變電(dian)(dian)(dian)(dian)(dian)(dian)站和(he)其它使用直(zhi)(zhi)流(liu)設備(bei)(bei)的(de)用戶,給信號設備(bei)(bei)、保護、自動(dong)裝置、事故照明(ming)、應(ying)急電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)及斷路器分、合閘操作提供(gong)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)設備(bei)(bei)。直(zhi)(zhi)流(liu)系(xi)(xi)統是一個獨立(li)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan),不受發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機、廠(chang)用電(dian)(dian)(dian)(dian)(dian)(dian)及系(xi)(xi)統運行方式的(de)影(ying)響。在(zai)外部交(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)中斷情況(kuang)下(xia),蓄電(dian)(dian)(dian)(dian)(dian)(dian)池提供(gong)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan),把儲蓄在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)池內的(de)多余電(dian)(dian)(dian)(dian)(dian)(dian)量用來(lai)給高壓柜合閘分閘、保護設備(bei)(bei)、應(ying)急照明(ming)系(xi)(xi)統等供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)。直(zhi)(zhi)流(liu)屏(ping)(ping)的(de)可靠(kao)性和(he)安全性直(zhi)(zhi)接影(ying)響到電(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)(xi)統供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)可靠(kao)性和(he)安全性。因此,在(zai)直(zhi)(zhi)流(liu)屏(ping)(ping)的(de)選擇上因從以下(xia)幾(ji)個方面著手:
(1)蓄電(dian)池的(de)選擇
不間斷供(gong)電(dian)(dian)設備,直流蓄電(dian)(dian)池(chi)是核心部件(jian)。初期的(de)直流電(dian)(dian)源系(xi)統大(da)多使用普通鉛(qian)酸(suan)電(dian)(dian)池(chi),其過(guo)載能力低,容(rong)易(yi)產生酸(suan)腐蝕等問題。逐漸隨(sui)著人們對堿性鎘鎳電(dian)(dian)池(chi)的(de)認識,以及(ji)和原鉛(qian)酸(suan)電(dian)(dian)池(chi)做比較,總結得出(chu)堿性鎘鎳電(dian)(dian)池(chi)有以下優點(dian):
1、良好的(de)機械強度,體(ti)積較小,能承受強大的(de)沖(chong)擊和振動,不易損壞。
2、壓降小,自放電引起(qi)的能量(liang)損失小。
3、過(guo)放電能(neng)力(li)強,不會(hui)因為過(guo)充引起內部短路
4、放(fang)電電壓(ya)平穩,壽命長,若合理(li)使(shi)用,可高達3000多個使(shi)用周期。
5、根據以上堿(jian)性(xing)鎘(ge)鎳電(dian)(dian)(dian)池(chi)的(de)(de)優勢,直流系(xi)統負載較重、過載可能大(如作(zuo)為電(dian)(dian)(dian)磁操作(zuo)機構的(de)(de)操作(zuo)電(dian)(dian)(dian)源)、安裝地(di)點環境良好、環境溫度(du)不(bu)高且具備較強(qiang)維護(hu)力(li)量的(de)(de)情(qing)況下,就(jiu)可選(xuan)(xuan)用(yong)堿(jian)性(xing)鎘(ge)鑷電(dian)(dian)(dian)池(chi)。反之(zhi),可選(xuan)(xuan)用(yong)免維護(hu)的(de)(de)鉛(qian)酸電(dian)(dian)(dian)池(chi)。
(2)充電系統的(de)選擇
充(chong)(chong)電(dian)(dian)(dian)設(she)備(bei)方面,目前使(shi)(shi)用(yong)較(jiao)多的(de)是可控(kong)(kong)硅相(xiang)控(kong)(kong)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)充(chong)(chong)電(dian)(dian)(dian)系統(tong)(tong),對電(dian)(dian)(dian)池(chi)的(de)充(chong)(chong)電(dian)(dian)(dian)分為主(zhu)充(chong)(chong)與浮(fu)充(chong)(chong)兩(liang)個階段,充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)分大(da)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)強充(chong)(chong)和涓流(liu)(liu)(liu)(liu)(liu)(liu)兩(liang)種(zhong)方式(shi)。而(er)控(kong)(kong)制方式(shi)常見的(de)有熱傳(chuan)感器法(fa)、定時法(fa)、負序(xu)電(dian)(dian)(dian)壓斜率法(fa)、伏(fu)安法(fa)等(deng)。近(jin)年(nian)來眾多生產廠家對此類直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)系統(tong)(tong),主(zhu)要(yao)在(zai)其(qi)控(kong)(kong)制技(ji)術上不(bu)斷(duan)改進,如(ru)集成(cheng)電(dian)(dian)(dian)路(lu)技(ji)術、PLC技(ji)術、微(wei)機監控(kong)(kong)、"三遙"通訊等(deng)技(ji)術不(bu)斷(duan)融合(he)其(qi)中,使(shi)(shi)相(xiang)控(kong)(kong)充(chong)(chong)電(dian)(dian)(dian)設(she)備(bei)系統(tong)(tong)的(de)可靠(kao)性(xing)(xing)不(bu)斷(duan)完善,因而(er)目前此類直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)屏(ping)系統(tong)(tong),其(qi)產品的(de)可靠(kao)性(xing)(xing)與實(shi)用(yong)性(xing)(xing)基(ji)本能令人(ren)滿意。但相(xiang)控(kong)(kong)充(chong)(chong)電(dian)(dian)(dian)機仍存在(zai)輸出(chu)電(dian)(dian)(dian)壓諧(xie)波(bo)大(da)、電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)紋波(bo)大(da),穩(wen)(wen)流(liu)(liu)(liu)(liu)(liu)(liu)精度較(jiao)難提(ti)(ti)高的(de)不(bu)足。同時由于(yu)(yu)其(qi)一(yi)般(ban)最多采用(yong)主(zhu)從備(bei)份的(de)方式(shi),在(zai)某些場(chang)(chang)合(he),系統(tong)(tong)可靠(kao)性(xing)(xing)仍令人(ren)感到美中不(bu)足。所以,國(guo)外在(zai)一(yi)些對直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源要(yao)求較(jiao)高的(de)場(chang)(chang)合(he)逐(zhu)步采用(yong)一(yi)種(zhong)較(jiao)為新型(xing)的(de)高頻(pin)開關電(dian)(dian)(dian)源,整體結構采用(yong)模塊(kuai)組合(he)方式(shi),其(qi)模塊(kuai)原理圖如(ru)下,即先(xian)將三相(xiang)交流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)整流(liu)(liu)(liu)(liu)(liu)(liu)為相(xiang)控(kong)(kong)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu),再變換為高頻(pin)交流(liu)(liu)(liu)(liu)(liu)(liu),高頻(pin)交流(liu)(liu)(liu)(liu)(liu)(liu)再經(jing)變壓器隔離、全(quan)橋(qiao)整流(liu)(liu)(liu)(liu)(liu)(liu)、濾波(bo)轉換為穩(wen)(wen)定的(de)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)輸出(chu)。此種(zhong)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源的(de)最大(da)特點(dian)是穩(wen)(wen)流(liu)(liu)(liu)(liu)(liu)(liu)精度高,紋波(bo)較(jiao)小,諧(xie)波(bo)失真小,是一(yi)種(zhong)高質量的(de)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源。在(zai)組成(cheng)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)系統(tong)(tong)時,可采用(yong)N個單元(yuan)模塊(kuai)組合(he)的(de)方式(shi)提(ti)(ti)供直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)輸出(chu),因而(er)備(bei)份程度高,直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)系統(tong)(tong)整體可靠(kao)性(xing)(xing)較(jiao)高。此類直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源目前國(guo)內已有廠家生產,但在(zai)整體外觀等(deng)方面略遜于(yu)(yu)傳(chuan)統(tong)(tong)相(xiang)控(kong)(kong)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)屏(ping),企業在(zai)選擇(ze)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源時可進行比(bi)較(jiao)取(qu)舍。
(3)直流屏系統(tong)維護
鎘鎳電池在使用中應主要(yao)注意以下問(wen)題:
1)定(ding)期對電池(chi)組進行大功率的充(chong)、放電,以激活電池(chi)內部的化學物質,降低電池(chi)惰性,恢復電池(chi)容(rong)量。
2)經常檢(jian)查電池液位,在(zai)電池滿容量時(shi)對過(guo)(guo)高、過(guo)(guo)低的電池液位及時(shi)進行調整(zheng)。
3)定(ding)期(qi)檢查(cha)電(dian)池溶液(ye)(ye)濃度(du),發現比重變化時予以補堿液(ye)(ye)或加水,必(bi)要時重新配制電(dian)解液(ye)(ye)。
4)定期逐個檢查電(dian)池(chi)(chi)端電(dian)壓,對個別電(dian)壓下降較大的電(dian)池(chi)(chi),單獨進行"活化"處理。
5)注意(yi)電(dian)(dian)池(chi)環境(jing)溫度,最好(hao)使電(dian)(dian)池(chi)在40℃以(yi)下(xia)(xia)溫度運行(xing),以(yi)免加劇電(dian)(dian)池(chi)的自放電(dian)(dian),引起電(dian)(dian)池(chi)容量下(xia)(xia)降(jiang)。
6)保(bao)持電(dian)池清潔及環境(jing)干(gan)(gan)爽(shuang),以免發(fa)生電(dian)池爬(pa)堿,導致電(dian)池容量下降和引起直流系統絕緣降低。平時及檢修時對電(dian)池外溢的(de)堿液應及時用干(gan)(gan)布(bu)擦凈,切不
可用(yong)水沖洗電(dian)池外(wai)部。
與鎘鎳電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)相比,免維(wei)護(hu)鉛(qian)酸電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的維(wei)護(hu)運行中維(wei)護(hu)工作(zuo)量較(jiao)小,平時只(zhi)需注意檢(jian)查(cha)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)各連(lian)接完好,保(bao)持連(lian)接無銹(xiu)蝕(shi)、腐(fu)蝕(shi);觀察電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)是(shi)否(fou)出現漲肚、變(bian)形;密封閥是(shi)否(fou)完好;電(dian)(dian)(dian)(dian)(dian)極(ji)柱有無熔(rong)融跡象;以及保(bao)持電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)清(qing)潔干燥等等。同時定期(qi)檢(jian)查(cha)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)單體端電(dian)(dian)(dian)(dian)(dian)壓,及時發現處理(li)失效(xiao)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)。
公司概況 - 公司產品 - 熱點新聞