Utilising Rate of Change of Positive Sequence of Voltage as an Anti-Islanding Strategy for Distributed Generation

Abstract

The modern electrical grid portrays an increase in Distributed Generation (DG) application in order to satisfy the demand of electricity. These DG infiltrations altered the classical grid architecture hence affecting the grid protection structure specifically in related to the islanding situation. Unintentional islanding brings serious threat to the maintenance personnel in charge of the islanded grid, electrical instruments as well as the DG connected in the microgrid. A lot of researches were already conducted and continuously done in the chase of an ideal anti-islanding strategy, whilst the ideal one is yet to be acquired. This paper proposes an islanding detection strategy based on monitoring the rate of change of positive sequence of voltage (ROCOPV). Simulations are conducted for several islanding situations that include the deficit, surplus, and balanced islanding cases, hence the output procured is promising. The ROCOPV efficiently detect all demonstrated islanding cases within 0.05 s without any non-detection zone (NDZ).