Abstract
From the electrical point of view, the concept of smart community (SC) was defined as a distributed system consisting of a set of smart homes, distributed energy resources (DERs) and energy storage systems (ESSs) using SC controllers to enable smart power management. In this context, the SC energy management system (SCEMS) acts as aggregator of these resources, aiming to assure benefits for every SC stakeholder by setting the SC operation. The references given by the SCEMS must be accurately tracked by the energy routers (ERs), intended as one of the key components of the SC, acting as smart interface between the utility grid and the prosumers’ DER and ESS. This study proposes a flexible, robust and simple control strategy for a single-phase ER. The ER regulates the active and reactive powers in grid-connected (GC) mode, and the voltage and frequency when operating in stand-alone (SA) mode. A seamless transition between SA and GC is demonstrated, avoiding undesired transients. The design and implementation of the proposed control strategy is progressively explained. Finally, this is tested via simulation (in PSCAD/EMTDC software) and verified with the experimental prototype.
Highlights
Nowadays, there is a shift in the electricity generation and in its management toward the smart grid (SG) approach
This section encompasses the development and setup of the energy routers (ERs) prototype. It has been experimentally tested in the same simulation scenarios, for a proper comparison and operating analysis
The ER was installed inside a cabinet (Fig. 15)
Summary
There is a shift in the electricity generation and in its management toward the smart grid (SG) approach. The SC electrical energy trading requires that the power converter acting as interface between the DER and AC SC may locally work as current-controlled and voltage-controlled voltagesource inverter [2], providing a seamless connection from SA to GC mode [29]. This seamless transition from SA to GC SC operation allows a reliable utility grid restoration (e.g. in a blackout event), taking the advantage of the distributed ER. The ER operation is validated via simulations with PSCAD/EMTDC tool and experiments through an ER prototype
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