Analysis of Real Time Implementation of Resampling Schemes: An Approach Based on IEC 61850-9-2

Signal resampling is a signal processing technique with several applications, among them to improve Sampled Values (SV) signals defined by IEC-61850-9-2. This makes it possible to analyze the SV signal more accurately and robustly for power substation protection. In this sense, this work aims to analyze and compare different resampling schemes, to validate them and explore their advantages. For this, schemes proposed by the literature and using conventional methods are analyzed. In addition, the schemes are implemented in a simulating signal (SV current) considering the signal as a whole and in a real time implementation. From the analyzes carried out, it can be seen that the resampling using the conventional Cubic Spline method presented one of the best performances, considering computational efficiency, spectral leakage, frequency variations and RMS measurements.