井下1350中央變電所電流整定計(jì)算

1、1280北翼采區(qū)變電所整定計(jì)算說(shuō)明：1280北翼采區(qū)變電所位于1280水平北翼集中巷二石門(mén)位置，距中央變電所1200米，由兩趟MYPTJ-35*3+16*1高壓電纜分別給專(zhuān)線和生產(chǎn)電源供電，用三臺(tái)KBSGZY-500/6移動(dòng)變電站和7臺(tái)饋電開(kāi)關(guān)組成供電系統(tǒng)。一、短路電流計(jì)算：一、各部分電阻、電抗計(jì)算1、系統(tǒng)電抗查附錄表：XX=0.00952、高壓電纜的電阻、電抗XL=0.078×1.2=0.0936R=0.588（查附錄表二）RL=RL=0.588×1.2=0.70563、變壓器的電阻、電抗、查附錄表191# 500KVA （Xb=0.0427 Rb=0.0068）2# 5

2、00KVA 3# 500KVA 因1#、2#、3#容量、型號(hào)相同，變壓器低壓側(cè)二次出口短路電流計(jì)算數(shù)值相同R=R*L/8.72+Rb=0.7056/8.72+0.0068=0.0161X=XX+0.0936/8.72+Xb=0.0095+0.0608/8.72+0.0427=0.053I(2)d=690/(2)=690/0.1782=6227A1#變壓器最遠(yuǎn)端的兩相短路電流低壓電纜的電阻、電抗50mm2的電纜R=0.448 X=0.08170mm2的電纜R=0.315 X=0.078UCP-3*70+1*25電纜長(zhǎng)度為1200米的電阻、電抗R =RL+0.0161=0.315*1.2+0.01

3、61=0.3941X =XL+0.053=0.078*1.2+0.053=0.1466Id(2)=690/(2)=690/0.4205=1640AUCP-3*70+1*25電纜長(zhǎng)度為1000米的電阻、電抗R =RL+0.0161=0.315*1.0+0.0161=0.3311X =XL+0.053=0.078*1.0+0.053=0.131Id(2)=690/(2)=690/0.356=1938AUCP-3*70+1*25電纜長(zhǎng)度為800米的電阻、電抗R =RL+0.0161=0.315*0.8+0.0161=0.2681X =XL+0.053=0.078*0.8+0.053=0.1154Id(2)=690/(2)=690/0.292=2363A到石門(mén)皮帶處的二相短路電流:XL=0.8×0.078=0.0624 RL=0.315×0.8=0.252X=0.0518+0.0624=0.1142R=0.0725+0.252=0.3245Id(2)=690/(2)=690/0.688=1003A總負(fù)荷:2×90+37+28+30=275KW1#高爆的整定:Imax=(