The analysis of faults in power system
They can be used in the analysis of faults in power system Consider a short section of a transmission line in which phase a is grounded.The fault as occurring on a short stub line,built out from the line at the fault point. Assuming that the power system consists of linear elements the whole system can be reduced to a single generator with an equivalent internal impedance by using Thevenin's theorem.The emfs Ea1, Ea2 ,Ea0 are the symmetrical components of the open circuit voltage to ground before the fault occurred. The prefault Volta are balanced and therefore, Ea1 =Ea Ea2 = 0 And Ea0 = 0 The impedance Z1, Z2 and Z0 are the positive, negative and zero sequence impedance viewed from the fault point. Procedure for fault calculation:- ✍️Zero sequence impedance diagram is...