Fault Location and Compensation of the Harmonic Content of the Residual Fault Current during Single-Phase to Ground Faults in Compensated Networks

Abstract

Ground fault location in compensated networks

has been considered as a challenging task until recently. Several

methods have been elaborated, most of them have not been able

to prove their capability under field conditions, or they are too

expensive or complicated.

This paper presents a new fault location technique, which uses

current injection parallel to the Petersen coil. Simulation and

field test results show the accuracy of the method. The injecting

device is further used to decrease the harmonics in the residual

fault current. This zero sequence active filtering method is

analyzed in detail using computer simulations and compared to

field test results.