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Fully Distributed Peer-to-Peer Optimal Voltage Control with Minimal Model Requirements

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This paper addresses the problem of voltage regulation in a power distribution grid using the reactive power injections of grid-connected power inverters. We first discuss how purely local voltage control schemes cannot regulate the voltages within a desired range under all circumstances and may even yield detrimental control decisions. Communication and, through that, coordination are therefore needed. On the other hand, short-range peer-to-peer communication and knowledge of electric distances between neighbouring controllers are sufficient for this task. We implement such a peer-to-peer controller and test it on a 400 V distribution feeder with asynchronous communication channels, confirming its viability on real-life systems. Finally, we analyze the scalability of this approach with respect to the number of agents on the feeder that participate in the voltage regulation task.

Author(s):

Lukas Ortmann    
ETH Zurich
Switzerland

Alexander Prostejovsky    
Technical University of Denmark
Denmark

Kai Heussen    
Technical University of Denmark
Denmark

Saverio Bolognani    
ETH Zurich
Switzerland

 

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