Fig. 12From: Improved voltage tracking of autonomous microgrid technology using a combined resonant controller with lead-lag compensator adopting negative imaginary theoremBlock diagram of three-phase load a consumer, b nonlinear, c unknown, d unbalanced. Three-phase load voltage for closed-loop with MIMO NI-RLLC controller for load e consumer, f nonlinear, g unknown, h unbalanced. Open-loop load voltage response of load i consumer, j nonlinear, k unknown and l unbalancedBack to article page