2021 **Abstract:** This paper demonstrates the splitting of the modular multilevel converter real-time simulation model into several independent parts through the use of the virtual capacitor concept. As a result, the number of state-space matrices the real-time solver needs to take into account gets significantly reduced, offering the possibility for substantial reduction of the simulation step size. Consequently, real-time simulation quality increases. The proposed concept was verified on a large-scale hardware-in-the-loop sys…

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“…The schematics of the HIL platform that is used in this paper is shown in Fig. 2 and is based on the interconnection of 10 RT Boxes to model the M3C, but shares the same control hardware as the setup used for IMMC described in [13] and [21]. One RT Box, hosting the input ac grid as well as the ac output application (ac machine or ac grid), will be referred to as Application RT Box.…”

confidence: 99%

“…The schematics of the HIL platform that is used in this paper is shown in Fig. 2 and is based on the interconnection of 10 RT Boxes to model the M3C, but shares the same control hardware as the setup used for IMMC described in [13] and [21]. One RT Box, hosting the input ac grid as well as the ac output application (ac machine or ac grid), will be referred to as Application RT Box.…”

confidence: 99%

“…Where L Σx = L x + L br 3 for the equivalent circuit seen from the input ac side, and L Σy = L y + L br 3 for the equivalent circuit seen from the output ac side. Equations ( 16) to (21) are equivalent as the equations from the initial model seen in Fig. 6, thus this initial model can be interchanged with the one from Fig.…”

confidence: 99%