Modified Robust Droop Control Based On Arctan Control Strategy For Proportional Load Sharing Between Parallel Operated Inverters

Abstract

In DG unit operation, the Inverter plays a vital role in interfacing energy sources. Effective interfacing energy can successfully be accomplished by operating inverters with effective control techniques. Many researchers have worked on the inverters' control in a microgrid. This study discusses the control method for inverters for proper control of frequency, power sharing and voltage used in an isolated microgrid. The study introduces a control strategy made of the virtual impedance droop control with arctan function as a primary controller, and the current controller is used as a secondary controller in single phase microgrid. Comprehensive simulations have been carried out to approve the proposed control strategy's capability in terms of stabilization of frequency, voltage, and power proportionately among the micro sources in the isolated microgrid.