Control of Microgrid with Multiple Distributed Generations in Islanded Mode /

Abstract

The integration of distributed generation in an islanded microgrid (MG) presents new challenges of control. Droop control is a widely used control in the hierarchical framework in a microgrid. However, droop control has some limitations which lead to power decoupling issues. The virtual impedance loop adjusts the resistive nature of MG and improves overall droop control of the microgrid system. This research work presents a performance analysis of droop control along with the addition of virtual impedance in the island mode operation of MG. The comparison of droop control along with virtual impedance is analyzed and three different microgrid scenarios were considered i.e. (i) Fault in the transmission line, (ii) Sudden increase in load, (iii) Sudden decrease in load. All these scenarios were simulated in MATLAB/Simulink and the effectiveness of the control strategies was analyzed.