Title: Effects of the Reactive Power Injection on the Grid―The Rise of the Volt/var Interaction Chain
Language: English
Authors: Ilo, Albana 
Category: Original Research Article
Issue Date: 2016
Journal: Smart Grid and Renewable Energy Journal 
ISSN: 2151-4844
The major challenge to increase the decentralized generation share in distribution grids is the main- tenance of the voltage within the limits. The inductive power injection is widely used as a remedial measure. The main aim of this paper is to study the effect of the reactive power injection (by what- ever means) on radial grid structures and their impact on the voltage of the higher voltage-level grids. Various studies have shown that, in addition to the major local effect on the voltage at the injection point, the injection of the reactive power on a feeder has a global effect, which cannot be neglected. The reactive power flow and the voltage on the higher voltage level grid are significantly affected. In addition, a random effect is introduced by the DGs which are connected through inverters (using wind or PVs). Although their operation is in accordance with the grid code, a volatile reactive power flow circulates on the grid. Finally, this study proposes the implementation of the “Volt/var secondary control” interaction chain in order to increase the distributed generation share at every distribution voltage level, be it medium or low voltage, and at the same time to guarantee a stable operation of the power grid. Features of Volt/var secondary control loops ensure a resilient behavior of the whole chain.
Keywords: Distributed Generation; LINK-Architecture; Smart Grid; Transmission Grid; Volt; var Control; Volt; var Interdependencies
DOI: 10.4236/sgre.2016.77017
Library ID: AC15216634
URN: urn:nbn:at:at-ubtuw:3-4484
Organisation: E370 - Institut für Energiesysteme und Elektrische Antriebe 
Publication Type: Article
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