Title: A Review on Islanding Detection Techniques for a Grid Connected Photovoltaic Systems
Authors: M.Vinay Kumar, U.Salma, V.Vikas
Volume: 2
Issue: 8
Pages: 195-203
Publication Date: 2018/08/28
Abstract:
Photovoltaic (PV) system, as a distribution generation (DG) is mostly preferred due to enormous advantages like solar energy available throughout the globe and throughout the year, free of cost, reduced emissions pollution free, highly reliable, no moving parts and less maintenance. Still there are few technical concerns, one of them is islanding phenomenon, hence islanding must be detected and the islanded DG’s must be disconnected from the left over part of the system. As per standard codes and grid codes limits, for a low power, less cost, current controlled inverter used in domestic PV system, the inverter should stop functioning after islanding condition is detected. Islanding detection techniques (IDT)are reviewed in this paper for anti-islanding protection of a grid connected PV system. These are broadly classified into four categories namely, Passive methods, Active methods, Hybrid methods and Communication based methods. Active methods are generally preferred over methods due to small Non detection zone (NDZ). Passive methods circuit design and operation are simple but it suffers from large NDZ, hence in performance, as compared to Passive methods. Hybrid method integrates both Passive methods and Active method. The advantages and disadvantages of each method are discussed