Location strategies and evaluation of detection algorithms for earth faults in compensated MV distribution systems

The compensation of MV distribution systems improves on the one hand the supply quality and imposes on the other hand higher constraints on earth fault detection and location strategies. Three new algorithms for the detection of permanent, resistive single phase earth faults are discussed. After a first implementation in the network, model testing showed the influence of important parameters on the algorithms accuracy, also for transient earth faults. Finally a novel strategy for fault location in compensated systems with a complex radial structure is outlined.