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

電中性(xing)點直(zhi)接(jie)接(jie)地時電氣設備外(wai)露(lu)可導電部分通(tong)過零(ling)線接(jie)地的(de)接(jie)零(ling)保護系統。

2、TN-C

工作零(ling)線(xian)與保護零(ling)線(xian)合一設置(zhi)的接(jie)零(ling)保護系(xi)統，工作零(ling)線(xian)有不平(ping)衡電流對地有電壓，不使用。

3、TN-C-S

工作零(ling)線(xian)與(yu)保(bao)(bao)護(hu)零(ling)線(xian)前一(yi)部(bu)分合一(yi)，后一(yi)部(bu)分分開設置(zhi)的接(jie)零(ling)保(bao)(bao)護(hu)系(xi)統。民用(yong)建筑用(yong)電設計較多(duo)為(wei)這種，但(dan)是現(xian)在配電室一(yi)般用(yong)漏電保(bao)(bao)護(hu)，所以(yi)也有比(bi)較多(duo)的TN-S系(xi)統。

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4、TN-S

工(gong)作零(ling)線與保護零(ling)線分開設置的接(jie)零(ling)保護系(xi)統；適用于工(gong)業(ye)與民用等低壓供電(dian)系(xi)統，對PE線就(jiu)是(shi)地線有(you)安全規定。

5、TT

電(dian)(dian)源中性點(dian)(dian)直接(jie)接(jie)地，電(dian)(dian)氣(qi)設備(bei)外露可導(dao)電(dian)(dian)部分直接(jie)接(jie)地的(de)接(jie)地保護系統(tong)，其中電(dian)(dian)氣(qi)設備(bei)的(de)接(jie)地點(dian)(dian)獨立于電(dian)(dian)源中性點(dian)(dian)接(jie)地點(dian)(dian)。投入(ru)鋼材較多，很難回(hui)收，且存在(zai)不(bu)安全因(yin)素，現在(zai)已(yi)經不(bu)使(shi)用。

二、供電系統由哪幾部分組成

電(dian)(dian)(dian)(dian)(dian)(dian)(dian)、輸(shu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)、變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)、配(pei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)、用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備及(ji)相(xiang)應的(de)輔助系統(tong)組成的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能生產、輸(shu)送、分配(pei)、使用的(de)統(tong)一整體稱為(wei)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系統(tong)。由(you)輸(shu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)、變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)、配(pei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備及(ji)相(xiang)應的(de)輔助系統(tong)組成的(de)聯(lian)系發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)與用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)統(tong)一整體稱為(wei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)網(wang)。也(ye)可描述為(wei)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系統(tong)是由(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)網(wang)以(yi)及(ji)用戶組成的(de)整體。

供電(dian)系統在保證電(dian)能質量、實現(xian)安(an)全可靠供電(dian)的(de)前提下，還應實現(xian)經濟運行，即努(nu)力(li)調整(zheng)負荷曲線，提高設備利(li)用率，合理利(li)用各(ge)種(zhong)動力(li)資源，降低燃料消耗、廠(chang)用電(dian)和電(dian)力(li)網絡的(de)損(sun)耗，以(yi)取得最(zui)佳經濟效益(yi)。