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On The Value of Communication Links in Voltage-VAR Control for Distribution Networks: A Game Theoretic Perspective

Event Type
Seminar/Symposium
Sponsor
Grainger CEME
Location
2017 ECEB
Date
Mar 13, 2017   4:00 - 5:00 pm  
Speaker
Kaiqing Zhang
Views
52

Slides

Video

 

Abstract

Distributed energy resources (DERs) offer an opportunity to regulate voltage profiles in distribution networks through reactive power (VAR) support. The problem can be cast as to achieve a desired voltage profile by optimally coordinating the limited VAR resources. Limited by the communication capability in current distribution networks, the optimal voltage-VAR control results based on centralized or distributed optimization/control algorithms may be unachievable. Hence, it is important to understand the communication-optimality tradeoff in voltage-VAR control to facilitate communication resource deployment. To this end, we first characterize the voltage-VAR control problem with scarce communication links from a game theoretic perspective. The property of the Nash equilibrium is analyzed and the conditions for the uniqueness are investigated. We also propose a distributed voltage regulation algorithm to achieve the NE under limited communications. To further understand the value of communication links, we propose a bi-level optimization problem for communication link placement and provide some preliminary numerical results for this NP-hard problem.

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