An algorithm for DC segmentation of AC power systems to mitigate electromechanical oscillations
Abstract
In the last decades, various events have shown that electromechanical oscillations are a major concern for large interconnected Alternative Current (AC) power systems. DC segmentation - a method that consist in turning large AC grids into a set of asynchronous AC clusters linked by Direct Current (DC) links - is a promising solution to mitigate this and other issues. However, no systematic segmentation procedure for a given AC power system exists so far. This paper aims at filling this gap and proposes an algorithm for DC segmentation for a given AC power system to mitigate electromechanical oscillations. In this proposal, DC segmentation is implemented with High Voltage Direct Current links based on Voltage Source Converters (VSC-HVDC). The algorithm uses small-signal stability techniques and the concept of dominant inter-area oscillation paths to stop the main inter-area mode of the power system. The algorithm will be explained using a six-generator test system and it will then be used on the Nordic 44 test system. The proposed algorithm for DC segmentation has been validated by means of non-linear time-domain simulation and small-signal stability analysis (SSSA).
Cite
@article{arxiv.2302.09931,
title = {An algorithm for DC segmentation of AC power systems to mitigate electromechanical oscillations},
author = {Mathieu Robin and Javier Renedo and Juan Carlos Gonzalez-Torres and Aurelio Garcia-Cerrada and Abdelkrim Benchaib and Pablo Garcia-Gonzalez},
journal= {arXiv preprint arXiv:2302.09931},
year = {2023}
}