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A microgrid is a controllable component of the smart grid defined as a part of distribution network capable of supplying its own local load even in the case of disconnection from the upstream network. Microgrids incorporate large amount of renewable and non-renewable distributed generation (DG) that are connected to the system either directly or by power electronics (PE) interface. The diversity of...
We discuss the evolving role of communication and control for automatic load management in electric distribution systems. We start by reprising a description of the Athens project - one of the earliest deployed examples of automatic load management at consumers enabled by communication signals. We observe that the use of communication for such systems has gone through distinct phases in its evolution...
This paper develops a voltage/frequency regulation scheme for an islanded distributed energy resource (DER) unit. The DER can be either a distributed storage (DS) unit or a dispatchable distributed generation (DG) unit. The DER unit is represented by a (time-varying) DC voltage source that is electronically interfaced to an aggregate of loads. The electronic interface consists of a voltage-sourced...
New energy generation systems, such as photovoltaic cells or fuel cells are increasing in application on distribution networks. These power sources require an inverter to connect to an AC network. There is the possibility that sub-network containing inverter power sources will be disconnected from the utility system to become isolated networks. This paper focuses on an isolated distribution network...
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