DefinePK

Abstract

Integration of Renewable Energy Resources (RERs) such as wind turbines and photovoltaic (PV) in to the electric power distribution network is on the increase. One of the integration requirements, in accordance with IEEE 1547 and UL 1741, is the islanding detection, basically implemented as Under Over Voltage (UOV) protection. This method has high Non Detection Zone (NDZ) due to the standard utility allowable voltage operation limits. In this paper, an inverter DC-Link voltage is used as an alternative for islanding detection with reduced NDZ compared with the UOV. MATLAB/ Simulink was used to simulate a 0.1 MW inverter-based, grid-connected PV system, as a test bench for the proposed islanding detection method.