An Overview on Voltage Stability Indices as Indicators of Voltage Stability for Networks with Distributed Generations Penetration
International Journal of Science, Technology and Society
Volume 3, Issue 4, July 2015, Pages: 214-219
Received: Jun. 23, 2015; Accepted: Jul. 1, 2015; Published: Jul. 22, 2015
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Author
Haruna Musa, Department of Electrical Engineering, Bayero University, Kano, Nigeria
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Abstract
The increase in Distributed Generation (DG) penetration in distribution network can be used as a means of addressing the increasing load demand without the upgrade of transmission lines. However, this increasing demand despite the supplementary supply from DG sources can cause the system to operate at its maximum capacity or at point of voltage collapse. It therefore, becomes necessary to determine the maximum capacity limit of the system before voltage collapse occurs due to instability. This paper reviews the concept of voltage stability index (VSI) as an indicator of a weak bus that is closed to its maximum allowable limit or the most critical line to voltage collapse in a network. The review also evaluates various voltage stability indices including those originally developed for transmission systems. Subsequently, their adequacies are quantitatively compared and from the comparison, it is observed that the existing voltage stability indices would be inadequate for assessing the most sensitive bus or line on the verge of voltage collapse for modern distribution systems.
Keywords
Distributed Generation, Penetration, Voltage Stability, Voltage Stability Index, Voltage Collapse
To cite this article
Haruna Musa, An Overview on Voltage Stability Indices as Indicators of Voltage Stability for Networks with Distributed Generations Penetration, International Journal of Science, Technology and Society. Vol. 3, No. 4, 2015, pp. 214-219. doi: 10.11648/j.ijsts.20150304.26
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