Short-time transient tracking algorithm for a non-residential facility based on characteristic indices

Abstract Impulsive transients can stimulate power system resonance and generate oscillatory transients and interferences in the action of power electronic devices connected to an electrical installation. These transients can be propagated to different points in the installation and provoke interferences in the equipment. This paper presents an algorithm based on the wavelet transform to identify transient phenomena at different points in the electrical installation and to track the transient to estimate if it is propagated to other points in the installation. The transient propagation is established firstly according with the time difference (Δt) between transients registered at different points, secondly some IEEE std. 1159-209 suggested indices like energy, amplitude and decay time are computed to see the differences between the transients identified as propagated and the rest of them. The experimentation is done in a non-residential building at five different points. The results show several differences in the indices between the group of transients classified as propagated and the rest of them.