Title:
Overcoming Communication Delays in Distributed Frequency Regulation
Overcoming Communication Delays in Distributed Frequency Regulation
Author(s)
Ramachandran, Thiagarajan
Nazari, Masoud H.
Grijalva, Santiago
Egerstedt, Magnus B.
Nazari, Masoud H.
Grijalva, Santiago
Egerstedt, Magnus B.
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Abstract
This paper proposes a general framework for determining
the effect of communication delays on the convergence
of certain distributed frequency regulation (DFR) protocols for
prosumer-based energy systems, where prosumers are serving
as balancing areas. DFR relies on iterative and distributed
optimization algorithms to obtain an optimal feedback law
for frequency regulation. But, it is, in general, hard to know
beforehand how many iterations suffices to ensure stability. This
paper develops a framework to determine a lower bound on the
number of iterations required for two distributed optimization
protocols. This allows prosumers to determine whether they can
compute stabilizing control strategies within an acceptable time
frame by taking communication delays into account. The efficacy
of the method is demonstrated on two realistic power systems
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Date Issued
2016-07
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