On Microgrid Evolution to Local Area Energy Network (E-LAN)

What is it about?

Owing to the increasing penetration of information and communication technologies and power electronics, low-voltage microgrids with distributed generation may progressively evolve to Local Area Energy Networks (E-LANs), that is, energy networks with degrees of flexibility, reliability, robustness, and readiness similar to LANs of digital devices. Thanks to grid meshing and synergistic exploitation of the control potential of distributed energy resources, E-LANs can provide an independent control of the currents flowing in each feeder of the grid. On this basis, new and advanced functionalities become possible, like, simultaneous demand response at multiple utility terminals, active and reactive power steering through grid feeders, active clearing of lines for maintenance. This paper presents an optimal control for E-LANs, which applies to low-voltage grids of any structure and complexity and assures independent control of the power fed by prosumers.

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Why is it important?

Owing to their unprecedented functionalities, E-LANs will play a crucial role in the evolution of electrical systems. However, their analysis, design, and management call for new approaches and tools capable to face the problem as a whole. This paper presents an optimal control approach that exploits every existing energy source and power electronics interface to accomplish the full E-LAN functionality, thus minimizing the need for additional power and control units.

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