Research on hybrid islanding detection technology based on SFS and SVS

In response to the disadvantage that SFS method is not suitable for applications with high-quality factor loads and can cause sinusoidal current distortion, a new hybrid islanding detection method based on SFS and SVS was adopted. The improvement of the chopping formula of SFS method and the problem of mixed use of SFS method and SVS method were studied. With the proposed new method, the performance of islanding detection was improved and the distortion rate of current was reduced. Therefore, the hybrid islanding detection method based on SFS and SVS can overcome the shortcomings of traditional SFS method, improve the success rate of islanding detection, and also improve the power supply quality of DG systems.