Rykov, K.K.RykovDuarte, J.L.J.L.DuarteSzpek, M.M.SzpekOlsson, J.J.OlssonZeltner, S.S.ZeltnerOtt, L.L.Ott2022-03-122022-03-122014https://publica.fraunhofer.de/handle/publica/38487010.1109/ISGT.2014.6816385The paper discusses aspects of modelling and operation of low-voltage DC-grids with aggregated power and load modules in terms of small-signal stability. Multiple power modules connected to the common DC-bus potentially may become a reason of voltage instabilities due to background harmonics interactions. Unfortunately, in a practical grid implementation, usually the internal structure of the converters including control algorithms and parameters is not fully known for the users. A technique of experimental impedance identification, applied to each module and which consequently enables for the relatively simple and effective analysis of the aggregated system, is described.en670conference paper