Wavelet Analysis of Dynamic Behaviors of the Large Interconnected Power System

TL;DR

This paper applies wavelet transform to analyze disturbance propagation in a large interconnected power system, providing insights into oscillations, generator groups, and system dynamics for improved system monitoring.

Contribution

It introduces wavelet analysis for localizing disturbances and identifying low-frequency oscillations in large power systems, enhancing understanding of system behavior.

Findings

Wavelet transform effectively localizes disturbance propagation.

Identification of coherent generator groups.

Insights into system speed retardation.

Abstract

In this paper, the simulation of the disturbance propagation through a large power system is performed on the WSCC 127 bus test system. The signal frequency analysis from several parts of the power system is performed by applying the Wavelet Transform (WT). The results show that this approach provides the system operators with some useful information regarding the identification of the power system low-frequency electromechanical oscillations, the identification of the coherent groups of generators and the insight into the speed retardation of some parts of the power system. The ability to localize the disturbance is based on the disturbance propagation through the power system and the time-frequency analysis performed by using the WT is presented along with detailed physical interpretation of the used approach.