The IPC technology-a new approach for substation updating with passive short-circuit limitation

Abstract

The paper presents a new approach to fault current limitation based on the interphase power controller (IPC) technology. From a power system point of view, this IPC has the same function as a transformer: it handles its share of the load current but, during a fault, it does not contribute to the fault current. It thus allows a substation to be updated without increasing the fault level. A four-transformer 315-120 kV substation is used to illustrate the concept.