Power Oscillation Damping at Multi-Feeder Nodes Following Equipment Failure Using a STATCOM

Anedi Oko Ganongo; Mathurin Gogom; Haroun Abba Labane; Gilbert Ganga

doi:10.46604/peti.2026.16262

Authors

Anedi Oko Ganongo Polytechnic Superior National School, Marien Ngouabi University, Brazzaville, Republic of the Congo https://orcid.org/0009-0008-5156-2819
Mathurin Gogom Polytechnic Superior National School, Marien Ngouabi University, Brazzaville, Republic of the Congo
Haroun Abba Labane Polytechnic University of Mongo, Mongo, Republic of Chad
Gilbert Ganga Polytechnic Superior National School, Marien Ngouabi University, Brazzaville, Republic of the Congo

DOI:

https://doi.org/10.46604/peti.2026.16262

Keywords:

damping, equipment failure, power oscillations, STATCOM, transient overvoltages

Abstract

This study aims to investigate the effectiveness of a static synchronous compensator (STATCOM) in damping power oscillations caused by equipment failure at multi‑feeder nodes. A theoretical framework based on differential equations and numerical simulation is developed to model transient behavior following feeder loss. The framework is evaluated using the Liouesso‑Ouesso network in the Republic of the Congo as a case study by comparing system responses with and without STATCOM compensation. Simulation results show that equipment failures produce oscillations lasting about three cycles, which can trigger cascading protection trips. Integrating a STATCOM reduces oscillation duration to half a cycle and lowers the peak overvoltage from 1.63 pu to 1.0 pu. In multi‑feeder configurations, the loss of one feeder causes unequal current redistribution, which can lead to nuisance relay tripping. The STATCOM mitigates these effects by reducing overcurrent duration below typical relay pickup times.

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