Chen, JunruJunruChenLiu, MuyangMuyangLiuMilano, FedericoFedericoMilanoO'Donnell, TerenceTerenceO'Donnell2021-08-202021-08-202020 Elsev2020-10Electric Power Systems Research0378-7796http://hdl.handle.net/10197/12443The increase in the use of Converter-Interfaced Generation (CIG) in the power system will require these generators to not only feed the power but also establish the voltage and maintain the grid stability. Virtual Synchronous Generator (VSG) control of the CIG is proposed to fulfill this requirement since it mimics the dynamics of synchronous generation. This paper takes the all-Island Irish transmission system as an example to investigate the frequency stability of the system as it migrates towards 100% CIG under VSG control and quantifies the minimum conditions for frequency support to sustain the system under 100% CIG. Simulations are carried out considering the worst contingency in the Irish grid which is the loss of largest infeed, namely, the disconnection of the HVDC interconnector to the UK. The results are compared and discussed considering other scenarios that include primary frequency control of conventional power plants.enThis is the author’s version of a work that was accepted for publication in Electric Power Systems Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electric Power Systems Research (187, (2020)) https://doi.org/10.1016/j.epsr.2020.106475Virtual synchronous generatorFrequency controlConverter-interfaced generationAll-island irish transmission system100% penetrationJournal Article18710.1016/j.epsr.2020.1064752020-07-2415/SPP/E312515/IA/3074883710https://creativecommons.org/licenses/by-nc-nd/3.0/ie/