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The News箱式變壓器可以承受多少kW的用電量?
[ 發布時間:2022-11-16 09:14:00 信息來源:全德電氣股份 ]
這個問題首先涉及到一個概念,那就是kVA和kW之間的關系及區別。
那有功(gong)(gong)功(gong)(gong)率、無功(gong)(gong)功(gong)(gong)率、視在功(gong)(gong)率它們有啥區(qu)別呢?
比如日(ri)常大家所交的電費,交的就(jiu)是有功電量(liang);
比(bi)如某個(ge)用(yong)電(dian)(dian)(dian)(dian)設(she)備里面有(you)電(dian)(dian)(dian)(dian)容(rong)(rong)/線圈,那這個(ge)設(she)備在工作的時候,電(dian)(dian)(dian)(dian)容(rong)(rong)/線圈就(jiu)會一(yi)直(zhi)處于(yu)充(chong)電(dian)(dian)(dian)(dian)放電(dian)(dian)(dian)(dian)狀(zhuang)態。因為電(dian)(dian)(dian)(dian)容(rong)(rong)/線圈一(yi)直(zhi)充(chong)電(dian)(dian)(dian)(dian)放電(dian)(dian)(dian)(dian),并(bing)沒有(you)真正消耗電(dian)(dian)(dian)(dian),所以(yi)把(ba)這一(yi)部分功(gong)率叫無功(gong)功(gong)率。
電源(yuan)(yuan)(一(yi)般都是指變壓器(qi)或(huo)者(zhe)發(fa)電機)它除了要(yao)(yao)給用電設備提供(gong)有功(gong)功(gong)率以(yi)外(wai),還需要(yao)(yao)提供(gong)無功(gong)功(gong)率。原因很簡單,用電設備里面的電容(rong)雖然不耗電,但是它一(yi)直在充電放電,所(suo)以(yi)也(ye)需要(yao)(yao)占(zhan)用電源(yuan)(yuan)一(yi)部分(fen)容(rong)量。
【功(gong)率因數(shu)】
【本(ben)題分(fen)析】
注意:電(dian)力(li)公司(si)要求功(gong)率因(yin)數必須(xu)0.9以上(shang),不然會(hui)有處(chu)罰;但是功(gong)率因(yin)數不能超過1,否則(ze)系(xi)統電(dian)壓會(hui)升高,影響系(xi)統正常(chang)運行。
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