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.
