Loss-of-synchronism detection automatics for the networks with distributed generation

Loss-of synchronism processes in the distribution networks with distributed energy resources are considered. They are influenced by new conditions that were not actual for the transmission system. To eliminate the loss-of-synchronism, special detection automatics is used. The application of such an automatics in low-voltage networks with distributed generation is specific. To meet the changed requirements, new algorithm of the automatic device is introduced. It is based on assumptions of voltage range and impedance angle. Equivalent non-synchronous emfs are modeled The method was tested by simulation of the loss-of-synchronism condition that takes place in the distribution networks.