Simulation and comparative analysis of single-phase H bridge micro inverters with conventional PI control and virtual output impedance control: a case study

Modelling, control design, and analysis of the inner control's loops intended for single‐phase voltage‐controlled inverter‐based microgrid

“…Various conventional and advanced control techniques have been adopted for the inner control implementation intended for voltage-controlled VSIs-based MG [11][12][13][14][15][16][17][18][19][20][21]. Among them are classical linear control systems with single or multiple proportional-integral (PI) feedback/feedforward loops [11][12][13][14][15][16], proportional-resonant (PR) control strategies [17][18][19], and advanced control strategies, such as model predictive control (MPC) [20], and sliding mode control (SM) [21], etc.…”

“…Various conventional and advanced control techniques have been adopted for the inner control implementation intended for voltage-controlled VSIs-based MG [11][12][13][14][15][16][17][18][19][20][21]. Among them are classical linear control systems with single or multiple proportional-integral (PI) feedback/feedforward loops [11][12][13][14][15][16], proportional-resonant (PR) control strategies [17][18][19], and advanced control strategies, such as model predictive control (MPC) [20], and sliding mode control (SM) [21], etc. However, the double-loop inner control scheme based on the PI controller, which consists of cascaded external voltage and internal current control loops (CCLs), is the most popular technique that has been applied to regulate the output voltage of the voltage-controlled VSIs.…”