Protection coordination of an inverter generation based microgrid for an unbalanced distribution system

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CIRED 2018 Ljubljana WS - 0200 - 20869.pdf (517.94 KB)

Paper number

0200

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Conference name

CIRED 2018 Ljubljana Workshop

Conference date

7 - 8 June 2018

Conference location

Ljubljana, Slovenia

Peer-reviewed

Yes

Short title

Convener

Authors

Bello, Mobolaji, Electric Power Research Institute (EPRI), The United States of America
Maitra, Arindam, Electric Power Research Institute (EPRI), The United States of America
Dugan, Roger, Electric Power Research Institute (EPRI), The United States of America
Gebeyehu, Araya, Southern California Edison (SCE), The United States of America
Araiza, Jorge, Southern California Edison (SCE), The United States of America
Weng, Dean, Electric Power Research Institute (EPRI), The United States of America
McGuinness, Sean, Electric Power Research Institute (EPRI), The United States of America

Abstract

In this paper we examine the protection issues that must be dealt with, to successfully operate a microgrid when the utility experiences a grid outage. Changes in fault current levels within microgrids under grid-tied and islanded conditions present challenges to developing robust and reliable protection schemes. These schemes must provide an effective response in both gridconnected and islanded mode and the transition between these modes. In this study, a section of an actual residential community located in the western part of the United States (U.S.) was considered as part of the microgrid evaluation. A sizing analysis was conducted to select the appropriate sizes of DER; simulated using DER-CAM analysis. The two DERs considered for the study included solar PV and Battery Energy Storage System (BESS). This paper highlights the protection coordination issues when an existing unbalanced distribution system encompassing a residential subdivision is converted into a microgrid with generation sources with low fault contribution. It further explains the strategy to coordinate protection devices during grid connected and islanded microgrid operating regimes.

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Keywords

Publisher

AIM

Date

2018-06-07

Published in

CIRED 2018 Ljubljana Workshop on Microgrids and Local Energy Communities

Permanent link to this record

https://www.cired-repository.org/handle/20.500.12455/1234
http://dx.doi.org/10.34890/382

ISSN

2032-9628

ISBN

978-2-9602415-1-8