ABC to DQ Transformation for Three-Phase Inverter Design as Prime Mover Speed Control in Microgrid System

Abstract

Microgrid is known as a distributed energy resource group that functions as a group classified into a number of microgrids, to facilitate robust control and operation infrastructure in future distribution systems. The control and design of the inverter and the technique of operating the microgrid testbed in stand-alone or parallel can affect the system frequency, with uncertain loading dynamics can make the frequency value increase or decrease. To overcome this problem, it is necessary to control the rotational speed of an inverter-based induction motor so that the frequency value remains 50 Hz $( \pm 1$%). The method of regulating the rotational speed of the induction motor in this study uses two methods, namely open loop and closed loop using a control vector. The closed loop results system is almost at the IEEE standard limit of 50 Hz $(\pm 1$%).