A voltage-based frequency controller for inverter-based systems in microgrids

Abstract

This paper presents a novel voltage-based controller for frequency control in inverter-based isolated microgrids through load voltage regulation. The proposed controller, described here in detail, makes use of the load sensitivity to operating voltage to regulate load consumption. The performance of the controller is evaluated and validated through simulation studies on PSCAD/EMTDC based on medium voltage distribution network benchmark. The controller offers two significant advantages: it decreases the system dependency on energy storage systems, and allows for higher penetration of renewable energy and hence less fuel consumption. The controller only requires a local feedback signal, and hence no extra communication infrastructure is needed.