Performance analysis of the Slip mode frequency shift islanding detection method under different inverter interface control strategies

This paper investigates the performance of Slip mode frequency shift (SMS) islanding detection method (IDM) in the presence of different inverter interface control strategies (IICS). The Impact of the two constant-current and constant-power IICS when the inverters are equipped with SMS-IDM, are compared and analyzed from detecting islanding point of view. This study is based on time-domain simulations in the MATLAB/Simulink. Performance of the SMS-IDM is tested under UL-1741 test condition. The results of study prove that, SMS-IDM efficiency can be degraded by the power regulator of the constant-power control strategy. So, efficiency of the SMS-IDM on islanding detection with constant-current control strategy is much higher than the constant-power control. Therefore, to improve the performance of the SMS-IDM with constant-power IICS, A new hybrid islanding detection method combination of the SMS-IDM and reactive power deviation is proposed. Finally, performance of the proposed method is evaluated under the UL-1741 antiislanding test condition, load switching and loads with high quality factor.