Signal injection based fault location scheme for medium voltage DC shipboard power system [articol]

Abstract

In this article, a fault location technique for medium voltage direct current (MVDC) shipboard power systems is presented. Accurate prediction of the fault location helps in restoration of the power in MVDC shipboard power systems. A portable device using probe power circuit (PPC) is used to estimate the location of the fault. The same circuit can be used to locate the fault in different zones of the MVDC shipboard power systems. The location of the fault is estimated using a non-iterative technique based on damping frequency and attenuation of the probe current. The proposed method using PPC is tested for fault close to PPC and different fault resistances. Test results indicate that the proposed method is simple, reliable, effective and accurate in locating the fault in MVDC shipboard power systems.