![]() Secondly, the concepts of primal-dual component were put forward such that the coupled-frequency oscillation components can be described exactly. Firstly, this paper illustrated that generalized-impedances can be obtained either by the system impedance matrixes or by the Jacobian transfer matrix. To reveal the oscillation mechanism and physical meaning of the generalized-impedances, a primal-dual complex circuit representing the GCS was proposed. ![]() Generalized-impedance method transforms the oscillation analysis of grid-connected converter system (GCS) into the resonance between the generalized-impedances of converter and grid, without ignoring coupling terms.
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