Evaluation of islanding detection of systems with fixed speed wind turbines

This paper provides an analysis of the performance of the under/over frequency and under/over voltage relays for islanding detection of fixed-speed wind turbines. This analysis is based on the performance curves and nondetection zones graphics, which are determined by dynamic simulations using SimPowerSystems/MatLab, FAST (Fatigue, Aerodynamics, Structures, and Turbulence) and TurbSim. The presented nondetection zones are constructed considering variations of: reactive power compensation, mean wind and detection times. Analyses on the performance curves are developed, and the influence of the active and reactive power mismatches on the voltage and frequency variations are realized.