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        Performance of wide-area power system stabilizers during major system upsets: investigation and proposal of solutions

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        Author
        Benasla, Mokhtar
        Denai, Mouloud
        Liang, Jun
        Allaoui, Tayeb
        Brahami, Mostefa
        Attention
        2299/23798
        Abstract
        Wide-area damping controllers (WADCs) are effective means of improving the damping of inter-area oscillations and thereby ensuring a secure operation of modern highly stressed interconnected power systems; however, their implementation costs are high. Therefore, the controller must be well configured and designed to ensure its cost-effectiveness. Several techniques have been proposed in the literature to design effective controllers and good results have been achieved. However, some important practical aspects that could potentially impact the performance of the designed controller have not been addressed or studied in sufficient detail in these previous works. One such aspect is assessing the performance of the designed controllers under major system upsets resulting in large deviations in the frequency and fluctuations in the power. These may lead to controller saturation which could negatively impact its damping performance or even cause instability. In this paper, the impact of such large upsets is investigated on several test systems via extensive small- and large-signal analyses and it is shown that, during severe transients, controller saturation may occur and persist over a long period of time, posing a potential threat to the power system stability. This paper presents a very effective solution to alleviate this problem and help design more robust WADCs. The simulation results show that the proposed solution works well and leads to improved power system stabilisers performance during transient upsets.
        Publication date
        2021-01-03
        Published in
        Electrical Engineering
        Published version
        https://doi.org/10.1007/s00202-020-01168-3
        License
        Other
        Other links
        http://hdl.handle.net/2299/23798
        Relations
        School of Physics, Engineering & Computer Science
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