A Distributed Generation Islanding Detection Method Based on Artificial Immune System

A passive method of detecting islanding of distrib uted generation inspired by the information processing proper ties of natural immune system is presented in this paper. Accord ing to the functions of the T cells and B cells of the immune sys tem, T-module and B-module for detecting islanding are estab lished. The T-module is used to detect the islanding condition. The B-module plays a role in improving the detection coverage space. The frequency spectra of the inverter output voltage are used as the detecting input signals. The algorithm is implemented with DSP. The results of experiment are presented. It illustrates the validity and efficiency of the approach.