Design and Implementation of an Embedded System for Islanding Detection and Control Action in PV Inverter system

Abstract

Abstract Many countries utilize hybrid energy systems for power generation. Transmission lines are used to deliver electricity to remote places from a variety of sources. During islanding, power lines are broken or damaged by natural or man-made causes. If not detected, animal life may be endangered. This paper presents anti-islanding technique that can be used to detect and prevent islanding. In this work, a prototype is developed using microcontroller for an anti-islanding PV inverter control system. The system detects islanding and disconnects the load from the source inverter and switches off the inverter. This technique continuously monitors the output power. A sudden drop in output power is indicative of islanding. The system immediately isolates the PV inverter from the output load and switches off all processing devices. A relay is used to isolate the PV inverter from the load. In the system developed here source isolation time is equal to relay switching time.