一、供電系統分為哪幾種

供電系統就是由電源系統和輸配電系統組成的產生電能并供應和輸送給用電設備的系統，供電系統可分為以下幾種：

1、TN

電(dian)(dian)中性點(dian)直接(jie)接(jie)地時電(dian)(dian)氣設備外露可(ke)導電(dian)(dian)部分通過(guo)零線接(jie)地的接(jie)零保護系統。

2、TN-C

工作(zuo)零(ling)線(xian)與保護零(ling)線(xian)合一(yi)設置的接零(ling)保護系(xi)統，工作(zuo)零(ling)線(xian)有(you)不平(ping)衡電(dian)流對地有(you)電(dian)壓，不使用。

3、TN-C-S

工作零線(xian)(xian)與保護(hu)零線(xian)(xian)前一(yi)部(bu)分合一(yi)，后一(yi)部(bu)分分開設(she)置的接(jie)零保護(hu)系統。民用建筑用電設(she)計較多為(wei)這種(zhong)，但(dan)是(shi)現(xian)在配電室一(yi)般用漏電保護(hu)，所(suo)以也有比較多的TN-S系統。

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4、TN-S

工作零線(xian)與保護(hu)零線(xian)分(fen)開設置的接零保護(hu)系統；適用于工業(ye)與民用等低壓供電系統，對PE線(xian)就是地線(xian)有(you)安全規(gui)定。

5、TT

電(dian)(dian)源(yuan)中性(xing)點(dian)直接(jie)接(jie)地(di)(di)，電(dian)(dian)氣(qi)設備外露(lu)可導電(dian)(dian)部分直接(jie)接(jie)地(di)(di)的接(jie)地(di)(di)保護系統(tong)，其(qi)中電(dian)(dian)氣(qi)設備的接(jie)地(di)(di)點(dian)獨(du)立(li)于電(dian)(dian)源(yuan)中性(xing)點(dian)接(jie)地(di)(di)點(dian)。投入鋼材較(jiao)多(duo)，很難回收(shou)，且存(cun)在(zai)不安(an)全因素，現在(zai)已經不使用。

二、供電系統由哪幾部分組成

電(dian)(dian)(dian)(dian)、輸電(dian)(dian)(dian)(dian)、變電(dian)(dian)(dian)(dian)、配電(dian)(dian)(dian)(dian)、用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)設(she)備(bei)及(ji)相應(ying)的(de)輔(fu)助系統(tong)組(zu)成(cheng)的(de)電(dian)(dian)(dian)(dian)能生產、輸送、分配、使用(yong)(yong)(yong)的(de)統(tong)一整體(ti)稱(cheng)為(wei)(wei)供電(dian)(dian)(dian)(dian)系統(tong)。由(you)輸電(dian)(dian)(dian)(dian)、變電(dian)(dian)(dian)(dian)、配電(dian)(dian)(dian)(dian)設(she)備(bei)及(ji)相應(ying)的(de)輔(fu)助系統(tong)組(zu)成(cheng)的(de)聯(lian)系發(fa)電(dian)(dian)(dian)(dian)與用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)的(de)統(tong)一整體(ti)稱(cheng)為(wei)(wei)電(dian)(dian)(dian)(dian)力網。也可描述為(wei)(wei)供電(dian)(dian)(dian)(dian)系統(tong)是由(you)電(dian)(dian)(dian)(dian)源、電(dian)(dian)(dian)(dian)力網以及(ji)用(yong)(yong)(yong)戶組(zu)成(cheng)的(de)整體(ti)。

供電(dian)系統在保證電(dian)能質量、實(shi)現安全可(ke)靠供電(dian)的(de)前提(ti)下，還應實(shi)現經濟運行，即(ji)努(nu)力調整負荷曲線，提(ti)高設備利用率(lv)，合理利用各(ge)種(zhong)動力資源，降低燃料消耗(hao)、廠用電(dian)和電(dian)力網絡的(de)損耗(hao)，以取得最佳(jia)經濟效益。