低压柴油发电机组配电系统短路电流计算

低压柴油发电机组配电系统短路电流计算

Special FeaturesFebruary 2007 Vol.1 No.1Short-circuit Current Calculation of Low-voltage Diesel GeneratingSet of Distribution System for IDCBy Wang Yuqing, Wang Zhensheng and Wang Li　1Abstract The paper introduces the calculation of short-circuit current of diesel generating set and power supply and distribution system, and expounds the calculation method and formula. Various short-circuit parameters have been calculated in combination with the front-end of diesel generator power supply and distribution system of a Data Center which is give a reference to the readers. Keywords equivalent voltage source, the initial value of symmetric short-circuit current, short-circuit current crest, symmetric short-circuit capacity 1.1ZGK=KGZG=KG√RG+X″2 d K G= Un UrG ZGK x″ d x″ =X″ /ZrG d d Un UrG cmax 1+ xd″sin rG 380V 400VElectrical Technology of Intelligent Buildings万方数据

低压柴油发电机组配电系统短路电流计算

2007211　 rGCmax RG X″ d X″ = d1.2IrGUrG/√ 3 1.00ip = κ√2I″ kκ µ1.02+0.98e-3Rk/XkIb=µI″ k tmin-0.26I″G/IrG kkG rG UrG√3IrGI″/IrG k. X″= ZrG. x″ d d√3IrG 1.4 I″ kµ=0.84+0.26e tmin=0.05s µ=0.71+0.51e-0.30I″ /I tmin=0.10s µ=0.62+0.72e -0.32I″ /Itmin=0.02skGrGRL=roL XL=xoL L ro xo1.3 ip I″=nI″ k k1m m /m m /m ip=nip1 n I″1 k ip11.5cUn cUn I″= √ = k 2 √ 3 √R 2 +Xk 3 Zk k cUn/ √ 3 Rk Rk=KGRG+RL Xk Xk=KGX″+XL d Zk ZK= √R 2 +X2 k ka. b. 1% c.0.01sLmQ万方数据

低压柴油发电机组配电系统短路电流计算

Special FeaturesFebruary 2007 Vol.1 No.1mm2L/Q0.05 ipm= √ 2 E*d .Kpm.Irm X*d2.1F1E*d X*d Kpm Irm ipm= √ 2 0.9 .1.Irm =7.5Irm 0.17 ip ipΣ=ip+ipm I″ kI″=I″ +I″ k kp kpm0.9 0.17 1.0I″ k ipm cUn cUn I″= √ = k 2 3 Zk √ 3 √R 2 +Xk k = 1 380 1.732 √ (K R )2+(K X″ )2 G G G d = 219.4 KG√RG2+X″ 2 dRG=0.0012 x″ =0.061 d X″ = d UrG√3 I rG. x″ d = 1670 0.8 400 1000√3　2 3 3m KOHLER 7M4058 IrG = X″= dPrG cos UrG. √ 3 400 3013= 3013A√3.0.061=0.0047 cmax 380 400 1 1+0.061 0.6I-LINE 4000A 20mI-LINE 4000A KG=UG UrG1+x″sin rG d==0.916 219.4 I″= k 0.916 √ 0.00122+0.00472 ip ip=κ √2 I″ k =49385.5Aκ1.02+0.98e-3Rk/Xk=1.02+0.98e-3 0.00470.0012ip=1.47√2=1.02+0.98 0.46=1.47 49385.5=102707.6A Ib49385.5 3013U rG= 4 0 0 V , PrG=1670kW Un=380V x″ =0.061 d ro=0.013m /m cos =0.8 RG=0.0013 I-LI N E 4 0 0 0 A xo=0.003m /mIb=µI″ k tmin=0.02s µ=0.84+0.26e-0.26I″ /I =0.84+0.26e-0.26kG rG=0.8436 Ib=0.8436 49385.5=41661A49385.5 3013kG rGtmin=0.05s µ=0.71+0.51e-0.30I″ /I =0.71+0.51e-0.30 =0.7136 Ib=0.7136 49385.5=35241AElectrical Technology of Intelligent Buildings万方数据

低压柴油发电机组配电系统短路电流计算

2007211tmin=0.10s µ=0.62+0.72e-0.32I″ /I =0.62+0.72e-0.32kG rG49385.5 3013=0.6236 Ib=0.62362.2cUn 1 I″= √ = k √3 3 ZK380 =46680A 0.0047 ip49385.5=30796AF2ip=κ √2 I″ k κ 1.02+0.98e-3Rk/Xk=1.02+0.98e-3 ip=1.4 √2 46680=92408A Ib Ib=µI″ k tmin=0.02s µ=0.8436 Ib=0.8436 tmin=0.05s µ=0.7136 Ib=0.7136 tmin=0.10s µ=0.6236 Ib=0.62360.0014 0.00447=1.446680=39379A 46680=33311A 46680=29110AF4RL=roL=0.013 XL=xoL=0.0083=0.039m 3=0.024m 0.0012+0.000039=0.001138 0.0047+0.000024=0.0043 2.4I″ k I″=3 k I″F3=3 k ip ip=3iPF3=3 92408=277224A Ib tmin=0.02s Ib=3 tmin=0.05s Ib=3 Ib=3 tmin=0.10s2.50.001138 0.0043Rk=KGRG+RL=0.916 Xk=KGX″+XL=0.916 d46680=140043A　I″ k cUn cUn 1 380 = I″= √ = k 2 √ 3 √0.0011382+0.00432 3 Zk √3 √R 2+Xk k =49303A ip ip=κ √2 I″ k39319A=118137A=118kA 33311A=99933A=100kA 29110A=87330A=87.3kAκ 1.02+0.98e-3Rk/Xk=1.02+0.98e-3 ip=1.465√2 49303=102132AIb=1.465F5EIb=µI″ k tmin=0.02s µ=0.8436 Ib=0.8436 tmin=0.05s µ=0.7136 Ib=0.7136 tmin=0.10s µ=0.6236 Ib=0.62362.3 F349303=41592A 49303=35183A 49303=30745A~I″ kip RL=roL=0.013 XL=xoL=0.008 23=0.3m 23=0.19m 0.0012+0.0003=0.0014 0.0047+0.000024=0.0043 cUn/√ 3 IbRk=KGRG+RL=0.916 Xk=KGX″+XL=0.916 dZk= √ 0.00142+0.004472 =0.0047 I″ k万方数据

低压柴油发电机组配电系统短路电流计算

大型数据中心低压柴油发电机组配电系统短路电流计算作者： 作者单位： 刊名： 英文刊名： 年，卷(期)： 引用次数： 王玉卿， 王振声， 王莉， Wang Yuqing， Wang Zhensheng， Wang Li 中国建筑设计研究院 智能建筑电气技术 ELECTRICAL TECHNOLOGY OF INTELLIGENT BUILDINGS 2007，1(1) 0次参考文献(2条) 1.国家质量技术监督局 GB/T 15544-1995.三相交流系统短路电流计算 1995 2.王振声.王玉卿 35～6/0.4kV配变电系统短路电流计算实用手册 2004本文链接：http:///Periodical_znjzdqjs200701006.aspx 下载时间：2009年11月24日