The increasing integration of inverter-based resources (IBRs) into the power
grid introduces new challenges, requiring detailed electromagnetic transient
(EMT) studies to analyze system interactions. Despite these needs, access to
the internal firmware of power electronic devices remains restricted due to
stringent nondisclosure agreements enforced by manufacturers. Per affrontare questo problema,
we explore three system identification techniques: sweep frequency response
analysis (SFRA), step excitation method (SEM), and eigensystem realization
algoritmo (ERA). SFRA employs sinusoidal signals of varying frequencies to
measure the system’s frequency response, while SEM and ERA utilize step
functions to derive time-domain responses and transform them into
Laplace-domain transfer functions. All three approaches are shown to provide
consistent results in identifying the dq admittance of grid-forming inverters
(GFM) over a frequency range of 1 Hz to 100 Hz.

Questo articolo esplora i giri e le loro implicazioni.

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