DC network stability and dynamic analysis using virtual impedance method

Chen, Dong and Xu, Lie and Yao, Liangzhong; (2012) DC network stability and dynamic analysis using virtual impedance method. In: IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society. IEEE, CAN, 5625 - 5630. ISBN 978-1-4673-2419-9 (https://doi.org/10.1109/IECON.2012.6389036)

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A stability and dynamic assessment method is proposed for converter interfaced DC networks. With the current loop modeled as a 1st order delay, an actively controlled DC terminal converter and its control can be modeled as a virtual impedance in S-domain. Terminal transfer functions can therefore be obtained using Thevenin's equivalent. Based on the modeling method, a case study concerning voltage variation suppression in a multi-terminal DC network is performed using root locus and open-loop margin analysis. The accuracy of the developed DC network model and its effectiveness for assessing system stability and dynamic performance is validated using circuit simulation in time domain.


Chen, Dong ORCID logoORCID: https://orcid.org/0000-0003-2567-7993, Xu, Lie ORCID logoORCID: https://orcid.org/0000-0001-5633-7866 and Yao, Liangzhong;