WASET
    Omid Borazjani and  Alireza Rajabi and  Mojtaba Saeedimoghadam and  Khodakhast Isapour,  Stability Improvement of AC System by Controllability of the HVDC.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
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    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10002027.