Dynamic behaviors of Distributed Generators and Proposed Solutions to Avoid Loss of Critical Generators

As the penetration level of the distributed generations on distribution network will increase, they must take their share of responsibility in the system security and provide flexibility and controllability necessary to support secure system operation. However, following the occurrence of large disturbances on the network (short-circuits, line outage, voltage dips...) the protective disconnection of large amount of DG (distributed generation) plants results in loss of generation and of support to the network that may lead to significant load shedding or in the worse case even a blackout. This paper presents an investigation about the transient stability and the capacity of DG to withstand disturbances of distributed synchronous generators and wind turbine generators on the distribution network. Two proposed control solutions to avoid the loss of generation are presented.