Multi-Machine Synchronous Islanding Achieved in a Laboratory Test Bed Utilizing PMUs

This paper describes a multi-machine synchronous islanding technique. This can be used to aid management of both intentional and unintentional island operation where the part of the grid becomes fragmented from the bulk utility grid. The multi-machine control scheme presented builds upon previous work on single machine control by the authors. The control scheme presented is realized and tested using a physical laboratory test bed which was developed as part of this work. The results show that synchronous islanding was successfully demonstrated. The ability of the system to maintain frequency and phase angle during a considerable load step was acceptable.