An Islanding Detection Methodology for SOFC-Based Static DG Using DWT

As the penetration of renewable-based power generation at a small scale into the distribution system is increasing, there are different challenges in terms of control, operation and protection of a microgrid. The detection of an islanding event—refers to a case of loss of utility grid—is one of the challenges. The usual requirement is to detect this event faster and accurately so as to enable control mechanism to further take care of distributed generation disconnection or mode change. This study presents a discrete wavelet transform-based islanding detection methodology. The rigorous MATLAB-based simulations are conducted for the performance investigation, and the results show that the proposed methodology is accurate and unaffected by the non-islanding events.