Publicerad: 2019-02-26
ISBN: 978-91-7685-148-7
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
This paper describes the modeling of a frequency controller that can be applied when islanding occurs at a power distribution network with a single distributed generator. The controller function requires bus frequency measurements which, for design purposes, need to be derived (computed) during dynamic simulations. Therefore, this paper also proposes a simple new frequency computation technique that can be used during dynamic simulations. The paper also addresses a technique for stochastic modeling of load uncertainties in the time-domain using the Modelica Noise library’s features. The performance of the islanded controller is evaluated under load uncertainties, different PMU (phasor measurement unit) reporting rates and communication latencies.
frequency computation, islanded controller, random load variation, PMU, distribution network, synchrophasors,Modelica, OpenIPSL
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