Fault location and isolation in micro-grids using a digital central protection unit

Sohrab Mirsaeidi, Dalila Mat Said, Mohammad Wazir Mustafa, Mohammad Hafiz Habibuddin and Kimia Ghaffari

Renewable and Sustainable Energy Reviews, 2016, vol. 56, issue C, 1-17

Abstract: Currently, there are significant interests in deployment of renewable and low carbon energy sources in the form of micro-grids for local energy generation. Micro-grids operate in two modes, namely stand-alone and grid-connected. This poses a problem in micro-grid protection settings, in a sense that the fault current magnitude in a micro-grid reduces drastically during its transition from being grid-connected to stand-alone mode of operation. This paper presents a micro-grid protection scheme based on positive-sequence component using PMUs and a digital CPU. The salient feature of the proposed scheme in comparison with the previous works is that it has the ability to protect both radial and looped micro-grids against different types of faults with the capability of single-phase tripping. Furthermore, since the CPU is capable of updating its pickup values (upstream and downstream equivalent positive-sequence impedances of each line) after the first change in the micro-grid configuration (such as transferring from grid-connected to islanded mode and or disconnection of a line, bus, or DER either in grid-connected mode or in islanded mode), it can protect micro-grid against subsequent faults. Finally, in order to verify the effectiveness of the suggested scheme and the CPU, several simulations have been undertaken by using DIgSILENT PowerFactory and MATLAB software packages.

Keywords: Micro-grid; Central protection unit; Grid-connected mode; Islanded mode; Fault location; Fault isolation (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S1364032115012940
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:rensus:v:56:y:2016:i:c:p:1-17

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/600126/bibliographic
http://www.elsevier. ... 600126/bibliographic

DOI: 10.1016/j.rser.2015.10.162

Access Statistics for this article

Renewable and Sustainable Energy Reviews is currently edited by L. Kazmerski

More articles in Renewable and Sustainable Energy Reviews from Elsevier
Bibliographic data for series maintained by Catherine Liu ().