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)中性點直接接地(di)時電(dian)氣設備外露可導電(dian)部分通(tong)過零線(xian)接地(di)的接零保護系統。

2、TN-C

工(gong)作零(ling)(ling)線與保護(hu)零(ling)(ling)線合一設置的接(jie)零(ling)(ling)保護(hu)系(xi)統，工(gong)作零(ling)(ling)線有不平(ping)衡電(dian)流對地有電(dian)壓，不使用。

3、TN-C-S

工作零線(xian)與保(bao)(bao)護(hu)(hu)零線(xian)前(qian)一(yi)(yi)部(bu)分(fen)合一(yi)(yi)，后一(yi)(yi)部(bu)分(fen)分(fen)開設置的(de)接(jie)零保(bao)(bao)護(hu)(hu)系統(tong)。民(min)用建筑用電(dian)(dian)設計(ji)較(jiao)多(duo)為這(zhe)種，但(dan)是現在配電(dian)(dian)室一(yi)(yi)般用漏電(dian)(dian)保(bao)(bao)護(hu)(hu)，所以也(ye)有(you)比較(jiao)多(duo)的(de)TN-S系統(tong)。

該圖片由注冊用戶"淺嘗不止—"提供，版權聲明反饋

4、TN-S

工(gong)作零(ling)線與(yu)保護(hu)零(ling)線分開設置的接零(ling)保護(hu)系統；適(shi)用(yong)于(yu)工(gong)業與(yu)民用(yong)等低(di)壓供(gong)電系統，對PE線就是地線有安(an)全規定。

5、TT

電(dian)源中性點直接接地(di)，電(dian)氣設備外露可導電(dian)部(bu)分(fen)直接接地(di)的接地(di)保護系統，其中電(dian)氣設備的接地(di)點獨立于電(dian)源中性點接地(di)點。投入(ru)鋼(gang)材較多，很難回收，且(qie)存在不安(an)全因素(su)，現(xian)在已經不使用。

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(pei)電(dian)(dian)(dian)(dian)、用電(dian)(dian)(dian)(dian)設備及(ji)相(xiang)應的輔(fu)助(zhu)系統(tong)(tong)組(zu)(zu)成的電(dian)(dian)(dian)(dian)能生(sheng)產、輸送、分配(pei)、使用的統(tong)(tong)一整體稱為(wei)(wei)供電(dian)(dian)(dian)(dian)系統(tong)(tong)。由輸電(dian)(dian)(dian)(dian)、變電(dian)(dian)(dian)(dian)、配(pei)電(dian)(dian)(dian)(dian)設備及(ji)相(xiang)應的輔(fu)助(zhu)系統(tong)(tong)組(zu)(zu)成的聯系發電(dian)(dian)(dian)(dian)與(yu)用電(dian)(dian)(dian)(dian)的統(tong)(tong)一整體稱為(wei)(wei)電(dian)(dian)(dian)(dian)力網。也(ye)可描述為(wei)(wei)供電(dian)(dian)(dian)(dian)系統(tong)(tong)是由電(dian)(dian)(dian)(dian)源、電(dian)(dian)(dian)(dian)力網以及(ji)用戶組(zu)(zu)成的整體。

供電系統在(zai)保證電能質量、實現(xian)安(an)全可靠供電的前提(ti)下(xia)，還應(ying)實現(xian)經濟(ji)運行，即努力調整負荷曲線(xian)，提(ti)高設備(bei)利用(yong)率，合理(li)利用(yong)各(ge)種動力資源，降低燃料消耗、廠用(yong)電和電力網(wang)絡的損(sun)耗，以取得最(zui)佳(jia)經濟(ji)效益。