Steady-State Analysis of a Faulted Three-Phase Four-Wire System Supplying Induction Motors with Neutrals Connected and Other Single-Phase Line-to-Neutral Loads

摘要

Four wire Wye connected ac power systems exhibit peculiar steady state fault characteristics when the fourth wire of three phase induction motors is connected. The loss of one phase of power source due to a series or shunt fault results in currents higher than anticipated on the remaining two phases. A theoretical approach to compute the fault currents and voltages is developed. A FORTRAN program is included in the appendix.