[1]系(xi)(xi)(xi)統(tong)(tong)(tong)電(dian)(dian)抗(kang)(標(biao)準(zhun)值(zhi))的計算(suan)系(xi)(xi)(xi)統(tong)(tong)(tong)電(dian)(dian)抗(kang)，100兆是(shi)1。電(dian)(dian)抗(kang)與電(dian)(dian)容(rong)的增減成(cheng)反比。100劃分(fen)系(xi)(xi)(xi)統(tong)(tong)(tong)容(rong)量(liang)(liang)(liang)(liang)的示例：參考容(rong)量(liang)(liang)(liang)(liang)為(wei)(wei)100兆伏(fu)安(an)。系(xi)(xi)(xi)統(tong)(tong)(tong)容(rong)量(liang)(liang)(liang)(liang)為(wei)(wei)100MVA時(shi)，系(xi)(xi)(xi)統(tong)(tong)(tong)電(dian)(dian)抗(kang)為(wei)(wei)xs *=100/100=1，系(xi)(xi)(xi)統(tong)(tong)(tong)容(rong)量(liang)(liang)(liang)(liang)為(wei)(wei)無窮(qiong)大時(shi)，xs *=100/200=0.5，xs *=100/=0。當不(bu)可用時(shi)，電(dian)(dian)源出(chu)(chu)口開關的分(fen)斷能(neng)力可作為(wei)(wei)系(xi)(xi)(xi)統(tong)(tong)(tong)容(rong)量(liang)(liang)(liang)(liang)。如果已知供電(dian)(dian)部(bu)門出(chu)(chu)口開關為(wei)(wei)W-VAC 12V2000A，則(ze)額定分(fen)斷電(dian)(dian)流為(wei)(wei)40kA。可以認為(wei)(wei)系(xi)(xi)(xi)統(tong)(tong)(tong)容(rong)量(liang)(liang)(liang)(liang)S=1.73*40*10000V=692MVA，系(xi)(xi)(xi)統(tong)(tong)(tong)電(dian)(dian)抗(kang)xs *=100/692=0.144。

[2]干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)電(dian)(dian)(dian)抗(標準(zhun)值)計算(suan)110千伏，10.5干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)容(rong)(rong)量除外；35kV，7臺干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)容(rong)(rong)量除外；10kv (6kv)，4.5干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)容(rong)(rong)量。例(li)：35kV3200kVA干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)的(de)電(dian)(dian)(dian)抗X *=7/3.2=2.1875 10kv 1600 kva干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)的(de)電(dian)(dian)(dian)抗X*=4.5/1.6=2.813干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)容(rong)(rong)量單(dan)位：MVA這里的(de)系數10.5，7，4.5實際上是干(gan)式(shi)(shi)變(bian)壓(ya)器(qi)(qi)(qi)(qi)短路(lu)電(dian)(dian)(dian)抗的(de)百(bai)分比(bi)。不(bu)同的(de)電(dian)(dian)(dian)壓(ya)電(dian)(dian)(dian)平(ping)有(you)不(bu)同的(de)值。

[3]電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)器電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)(標稱值)的計(ji)算(suan)電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)器的額(e)(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)除以額(e)(e)(e)定(ding)容量，然(ran)后減去(qu)10%。例：有(you)一個(ge)電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)器U=6kVI=0.3kA額(e)(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)X=4。額(e)(e)(e)定(ding)容量s=1.73 * 6 * 0.3=3.12mva。電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)器電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)X*={4/3.12}*0.9=1.15電(dian)(dian)(dian)(dian)(dian)抗(kang)(kang)器容量單(dan)位：mva

【4】架空(kong)(kong)線及電(dian)纜電(dian)抗(kang)(標準值)計(ji)算(suan)架空(kong)(kong)線：6kV，等于公里(li)；10kV，取(qu)1/3；35kV，取(qu)3%。電(dian)纜：用架空(kong)(kong)線乘以(yi)0.2。例：10kV6kM架空(kong)(kong)線。架空(kong)(kong)線電(dian)抗(kang)X*=6/3=210kV0.2KM電(dian)纜。這里(li)做了簡化。實(shi)際(ji)上，架空(kong)(kong)線和電(dian)纜的電(dian)抗(kang)與其(qi)橫截面積有(you)關。橫截面越大(da)，電(dian)抗(kang)越小。

[5]短(duan)(duan)路容(rong)(rong)量(liang)的(de)計算電(dian)抗(kang)的(de)設置和刪除是100。例：如果已知(zhi)短(duan)(duan)路點前各元件的(de)標稱電(dian)抗(kang)值之和為X *=2，則短(duan)(duan)路點的(de)短(duan)(duan)路容(rong)(rong)量(liang)SD為100/2=50mva。短(duan)(duan)路容(rong)(rong)量(liang)單位(wei)：MVA

【6】短(duan)(duan)路(lu)電(dian)(dian)(dian)流6kV計算，9.2除(chu)電(dian)(dian)(dian)抗(kang)；10kV，5.5除(chu)電(dian)(dian)(dian)抗(kang)；35kV，1.6除(chu)電(dian)(dian)(dian)抗(kang)；110kV，0.5分電(dian)(dian)(dian)抗(kang)。0.4kV，150除(chu)以電(dian)(dian)(dian)抗(kang)例：如(ru)果已知短(duan)(duan)路(lu)點前各元件的(de)標稱電(dian)(dian)(dian)抗(kang)值之和(he)為X*=2，短(duan)(duan)路(lu)點的(de)電(dian)(dian)(dian)壓(ya)電(dian)(dian)(dian)平(ping)為6kV，則(ze)短(duan)(duan)路(lu)點的(de)短(duan)(duan)路(lu)電(dian)(dian)(dian)流以kA為單(dan)位

[7]短(duan)路(lu)沖(chong)擊(ji)電(dian)(dian)(dian)流(liu)的(de)計算(suan)(suan)1000kVA及以下(xia)的(de)干(gan)式(shi)變壓(ya)器(qi)二次(ci)(ci)側(ce)短(duan)路(lu)時(shi)：沖(chong)擊(ji)電(dian)(dian)(dian)流(liu)有(you)效(xiao)值Ic=Id，沖(chong)擊(ji)電(dian)(dian)(dian)流(liu)峰值Ic=1.8id 1000 kVA以上的(de)干(gan)式(shi)變壓(ya)器(qi)二次(ci)(ci)側(ce)短(duan)路(lu)時(shi)：沖(chong)擊(ji)電(dian)(dian)(dian)流(liu)有(you)效(xiao)值Ic=1.5Id，沖(chong)擊(ji)電(dian)(dian)(dian)流(liu)峰值ic=2.5Id例：如果已知短(duan)路(lu)點{1600kVA干(gan)式(shi)變壓(ya)器(qi)二次(ci)(ci)側(ce)}的(de)短(duan)路(lu)電(dian)(dian)(dian)流(liu)，則有(you)效(xiao).由此可見，短(duan)路(lu)電(dian)(dian)(dian)流(liu)計算(suan)(suan)的(de)關鍵(jian)是(shi)計算(suan)(suan)短(duan)路(lu)點(標稱值)之前的(de)總電(dian)(dian)(dian)抗，但必(bi)須包括(kuo)系(xi)統電(dian)(dian)(dian)抗。

來(lai)源：變電站運行(xing)技術網(wang)