Hierarchical Control Approach for an Autonomous Microgrid including PV Systems to Mitigate the Impacts of Non-Linear Loads

In this paper, a control approach for enhancing the characteristics of a microgrid system is presented. This microgrid includes a PV system in its DC link beside a DC/DC convertor as the interface for connecting to the system inverter. Due to this, the dynamics of the PV system is also considered. The capability of this control system in maintaining the significant feature of system signals under non-linear load or load variation is also investigated. The secondary controller in this system is designed to not only restore the system voltage and frequency but also preserve the value of active and reactive power before and after its operation. The simulation results show the capability of this control system in maintaining the system performance.