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3.3_Orellana: Modelling grid connected VSCs for small signal stability studies

Luis Orellana

Methods to model grid-connected VSC systems in order to study the instability phenomena used in the literature are impedance-based and state-space modelling. Impedance-based is based on the impedance characterization of a system which can be expressed as a transfer function in the s-domain. On the other hand, state-space represents it as a system of linear equations in the time domain, resulting in a state transition matrix which relates the inputs and the outputs of a system.

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