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The first part of this paper contains a short review on problems related to distribution system operators' (DSOs) current practice regarding earth fault location and sustained faulty operation of compensated networks. A new device and method are then presented that have been implemented recently at Hungarian DSOs. This technique uses current injection parallel to the Petersen coil for fault location,...
The harmonic content of the short circuit current during single-phase to earth fault is discussed in networks with compensated neutrals. An overview of different methods to decrease the harmonics in the fault current is given. The zero sequence active filtering method is analyzed in detail using computer simulations. Two compensation algorithms are compared based on their efficiency when operation...
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