Connection and Disconnection Transients for Micro-grids Under Unbalance Load Condition.
Location: Birmingham, UK
Publication date: 2011-08-30
Published in: European Conference on Power Electronics and Applications 2011, Birminghan (UK) - EPE 2011
ref. DOI: No disponible

Local members

Joan Rocabert

PhD. Senior Researcher

Jose Ignacio Candela

PhD. Senior Researcher. Project Responsible

External members

Azevedo, G.M.S. , Blaabjerg, F.



The recent grid integration of Distributed Energy Resources (DER) possibility the formation of intentional islands in the case of a grid fault conditions. For such island formation is required an active agent capable of governing the micro-grid connection state in a safe mode, especially inconnection and disconnection transients. This paper focuses on the design of a method oriented to carry out a stable intentional disconnection, and later re-connection, of local gridsfrom the main distribution grid in an intentional way; also under unbalance load condition. Seamless transfer between grid-connected and isolated mode has been achieved in an alpha-beta stationary reference frame with a frequency based synchronization control loop. Simulation and experimental results are provided to verify the proper performance of the proposed solution.


Associated projects

National public