A Short Term Recursive Matrix Pencil Based Distribution System Protection Scheme

The occurrence of a single line to ground (SLG) fault including high impedance faults (HIFs) in different grounding systems results in a fault current with low magnitude. This causes difficulties for the existing protection unit to detect the fault and identify the faulty feeder. To overcome, this manuscript aims for a new fault detection approach based on the sliding window-based recursive matrix pencil method (RMPM). The proposed method begins with the reconstruction of the fault signal using RMPM and then computes the transient error by subtracting the reconstructed fault signal from the original signal. This transient error is used as a fault detection index (FDI) which is also used to classify the faulty feeder. Results show the effectiveness of the addressed method, obtained by simulating different worst scenarios (fault and non-fault).