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POWER TRANSMISSION AND DISTRIBUTION …
Tom Penick 05/10/99 Page 1 of 11 POWER TRANSMISSION AND DISTRIBUTION ee368 INDEX attentuation and buck voltage per unit rod voltage per unit and Mengele wave ratio ' of two to a single LOSSLESS LINEMost TRANSMISSION lines fall into this category. Theformulas are simplified since 0 R and +=V0 ZBeAezz =I = (gamma) propagationconstant = attenuation constant = phase constant [rad/m]A = voltsB = voltsZ0 = characteristic or surgeimpedance [ ]when LR << and CG << then:CLGLCR22+= and LC = dZdRRS + =sinhcosh0 IVVddZRRS + =coshsinh0 IVICLZ=0 SHORT TRANSMISSION LINEA TRANSMISSION line is considered short when there is asmall angular variation, z << 1 LINE BASICSL ocations along thetransmission line aretraditionally referencedfrom the receiving = -dz= 0 VSdVRBAR+=V)(10 BAzR =Id = length [m]VS = voltage (complex) at thesending end [v]VR = voltage (complex) at thereceiving end [v]IS = source current (complex)[A]IR = load current (complex)[A]z = distance from the receivingend (a negative value orzero) [m] = (gamma) propagationconstant.
Tom Penick tomzap@eden.com www.teicontrols.com/notes 05/10/99 Page 1 of 11 POWER TRANSMISSION AND DISTRIBUTION EE368 INDEX attentuation constant.....3
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