Abstract—Microgrids play a vital role in future distribution networks. In this regard, dispatching the generation & unit commitment strategies are not directly applicable to this kind of generation/demand structure. Transmission systems as part of the conventional power systems have mature strategies for dispatching and especially remedies to cope with congestions in critical paths. In this paper, it is assumed that the main distribution system is composed of different individual microgrids as single identities connected to the distribution grid. Congestion management is of primary concern in the tie lines connecting the microgrids to the utility grid or between the microgrids. Back-to-back Voltage Source Converters (VSCs) as an interfacing facility is used to cope with the congestion in the interconnecting lines. Thyristor Controlled Series Capacitor (TCSC) is also proposed as the controlling device to manage the congestion. Other strategies like using a central controller with communication links to the microsources in order to dispatch remedial actions is also proposed; and ultimately optimal switching of the existing paths are used to mitigate the congestion.

Keywords—congestion management; formatting; Back-to-back Voltage Source Converters (VSCs); Thyristor Controlled Series Capacitor (TCSC); microgrid

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