Predicting and preventing problems associated with remote fault clearing voltage dips

The authors offer general techniques for predicting, preventing, reducing, and coping with problems associated with remote fault clearing voltage dips. They show how to combine accepted analysis tools to predict all the important characteristics of voltage dips. The basic tools include a computer program to calculate unbalanced fault currents and voltages, reliability data, fault clearing device characteristics, and an optional transient analysis program. Difficult calculations should be performed by any of several good analysis programs that are available. These programs can evaluate alternate configurations to optimize system performance. These techniques allow engineers to anticipate and possibly prevent voltage dip problems. finally, the authors offer suggestions for coping with voltage dips that cannot be eliminated