Test methodology for validation of multi?frequency models of renewable energy generators using small?signal perturbations

Providing trustworthy and accurate multi-frequency (or harmonic) models for renewable energy generators (REG) is an ongoing challenge harmonic studies. There have been effective attempts to propose design a test device validate the models, mainly based on shunt current perturbations. However, using additional devices perturbations costly converter-based sites. This paper provides specifications extend application of grid emulators voltage appropriate model validation. Besides, effects sequence couplings, initial emissions, power set-points results overlooked in literature. Considering these effects, this proposes generic methodology obtain more domain. The experimental verification proposed demonstrated 7 MVA emulator testing 2 photo-voltaic converter Type 3 wind turbine. way, challenges, specifications, recommendations are presented MW-scale experiments different REGs. Furthermore, couplings emissions calculation investigated compared. applicable validation as well empirical modelling.