Impact on reliability in active networks with distributed generation interconnection

The impact of distributed generation interconnection on reliability indices is analyzed in this paper. The reliability indices of sample network with re-closing, alternate feed, anti-islanding, intentional islanding are calculated respectively. Distributed generators often have a negative impact on reliability indices through re-closing failure, unintentional islanding and other improper strategies. The splitting islanding and self-startup islanding with auto re-closing can improve system reliability. The evaluation model of system reliability for dispersed generators interconnection and SAIFI-Island Curve are also derived. Impact of islanding on reliability indices can be observed obviously in island planning and splitting optimization through evaluation model and SAIFI-Island Curve.