A Normal Form-based Power System Out-of-step Protection

Date
2022-07
Authors
Ugwuanyi, Nnaemeka Sunday
Kestelyn, Xavier
Thomas, Olivier
Marinescu, Bogdan
Wang, Bin
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract

This paper proposes a new system-level application for monitoring out-of-step (OOS) events in power systems. As already known, amplitude-dependent frequency shift is a nonlinear phenomenon of electromechanical oscillations under large disturbances. The frequency shift indicates the system’s nearness to instability. This new tool utilizes the Normal Form method to identify the named phenomenon, leading to accelerated OOS detection. The proposed strategy is illustrated and compared to the equal-area criterion method in a single-machine-infinite-bus power system. Extensive tests on IEEE 3- and IEEE 50-machine power systems prove the efficacy and potential of the proposed method for online warnings of instability and ranking of vulnerable system modes.

Description
This version is the accepted manuscript and is embargoed until August 1, 2024. See final published version at https://doi.org/10.1016/j.epsr.2022.107873
Keywords
normal form, oscillation frequency drift, out-of-step detection, transient stability
Citation
Ugwuanyi, N. S., Kestelyn, X., Thomas, O., Marinescu, B., & Wang, B. (2022). A normal form-based power system out-of-step protection. Electric Power Systems Research, 208, 107873. doi:https://doi.org/10.1016/j.epsr.2022.107873
Department
Electrical and Computer Engineering