DATA SMOOTHING BY B-SPLINE WAVELETS FOR DIGITAL DISTANCE PROTECTION

The multiresolution analysis generated by the compactly supported card inal B-spline wavelets for data smoothing is introduced. It is shown t hat the proposed technique has the advantages of high accuracy and low delay and may be used instead of the traditional low-pass filters for power system protection. Its applications in digital distance protect ion are presented in detail. Simulation studies using EMTP have shown that the wavelets-based method can reduce the relaying time and may be suitable for digital distance protection. (C) 1998 Elsevier Science L td. All rights reserved.