Model Predictive Direct Current Control for a grid-connected converter: LCL-filter versus L-filter

Finite Control Set Model Predictive Current Control for Grid-Connected Voltage-Source Converters With <italic>LCL</italic> Filters: A Study Based on Different State Feedbacks

“…damping resistance A well-known approach to mitigate these losses is to use a virtual resistance (VR) based active damping concept by using additional feedback of the filter-voltage uf [30] [31] [43]. This method simulates a damping resistance by injecting an additional converter-side current component.…”

“…The simple cost function (30) proves to be beneficial as well. However, this approach requires control and prediction horizons > 1 due to the fact that the predicted value of cannot be directly manipulated by when utilizing the Euler-forward discretization.…”

“…Thus, special attention has to be paid while introducing active damping methods to FCS-MPC applications, such as suggested in [30]- [32]. In this work, online optimized FCS-MPC approaches for grid-connected VSC with LCL filters based on different state feedbacks are presented with the objective to minimize switching losses (via lower switching frequencies) and achieve acceptable current distortion.…”

Model predictive control of three-level four-leg flying capacitor converter operating as Shunt Active Power Filter

“…Recently a significant interest in application of predictive control, to different power converters [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] . Finite control-Set Model Predictive Control (FS-MPC) became very popular, because it performs the states selection, according to defined requirements, bringing an immediate and the most effective solution during the operation what fits very well to the assumptions of SAPF operation.…”

“…Recent papers show applications of FS-MPC to 2-level converter for 3-leg and 4leg SAPF [10][11][12][13][14][15][16][17][18] as well as multilevel converters e.g. Neutral-Point Clamped (NPC) or FCC [15], [19][20][21][22][23][24][25]. However, none of those positions considered FS-MPC application to 4-leg FCC operating as SAPF.…”