Improved Identification of Natural Frequencies of Fault-Originated Travelling Waves

This paper explores the electromagnetic transient travelling waves initiated by faults in electrical power networks with a focus on identifying their associated natural frequencies. Prior research has introduced fault-inferred mother wavelets to address the limitation that traditional mother wavelets typically only detect initial natural frequencies. This paper analyses how the alternative use of L<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</inf> normalization, together with modifications to the Q factor, enables traditional mother wavelets to attain performance comparable to that of fault-inferred mother wavelets in identifying all expected natural frequencies. In this way, this approach also mitigates the dependency on a specific case and the additional complexity involved in constructing fault-inferred mother wavelets.