H _∞ robust control with improved harmonics suppression for inverter‐based distributed generation systems

Internal Model-Based Cascaded Control Approach for Multi-Functional Grid Interactive Converters

“…In literature various control schemes are reported for GICs to interface the renewable energy based DGs to the utility grid [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. To ensure good power quality at PCC either additional compensating devices or GICs with multifunctional capabilities shall be utilized [8][9][10][11].…”

“…Various control techniques based on PI controller, proportional resonance (PR) controller, sliding mode controller (SMC), model predictive controller (MPC) and intelligent controllers are discussed for regulating power flows and to improve power quality in a grid connected MG (GC-MG) [10][11][12][13][14][15][16][17][18][19][20][21]. In [10], authors have utilized PI controller for integrating renewable energy resources to MG with low THD under ideal conditions.…”

“…Similarly, a quasi-PR controller is utilized for improving the tracking capability of the overall system [16]. A variety of new emerging control approaches for current control of gridconnected converters have been recently proposed in literature [17][18][19][20][21][22][23][24]. In [17], a robust control strategy using H∞ controller is designed and implemented to improve the current quality under the presence of distortions in grid voltages.…”

“…A variety of new emerging control approaches for current control of gridconnected converters have been recently proposed in literature [17][18][19][20][21][22][23][24]. In [17], a robust control strategy using H∞ controller is designed and implemented to improve the current quality under the presence of distortions in grid voltages. In [18][19][20], SMC and its variants are implemented to improve the system performance under unbalanced operating conditions.…”