Protection of active distribution networks incorporating microgrids with multi-technology distributed energy resources

Protection of active distribution networks incorporating microgrids with multi-technology distributed energy resources

The protection of active distribution networks incorporating microgrids with high penetration of Distributed Energy Resources (DERs) can be challenging if traditional protective relays are used. This is mainly due to the changes in the power flow, fault current level, difficulty in protection coordi...

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Bibliographic Details
Published in:Electric power systems research Vol. 202; p. 107575
Main Authors: Adewole, Adeyemi Charles, Rajapakse, Athula D., Ouellette, Dean, Forsyth, Paul
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-01-2022
Elsevier Science Ltd
Subjects:
Adaptive algorithms
Adaptive protection
Algorithms
DER
Diesel generators
Distributed generation
Electricity distribution
Energy sources
Energy storage
Fault detection
Fault diagnosis
Inverter
Microgrid protection
Microgrids
Networks
Penetration
Power flow
Solar energy
Studies
Topology
DER
Inverter
Microgrid protection
Adaptive protection
Microgrids
Online Access:Get full text
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Description
Summary:The protection of active distribution networks incorporating microgrids with high penetration of Distributed Energy Resources (DERs) can be challenging if traditional protective relays are used. This is mainly due to the changes in the power flow, fault current level, difficulty in protection coordination, changes in system topology, and system operating conditions. This paper proposes three new protection algorithms for active distribution networks with large penetration level of inverter-based DERs. These protection algorithms comprise of an adaptive differential protection algorithm, incremental transient energy-based directional protection, and a rate-of-change of current protection. The proposed protection algorithms were tested with a distribution network integrated with wind, solar, diesel generator, and battery storage DERs which are capable of operating in islanded mode forming local microgrids. The distribution system and the proposed protection functions modelled and simulated using the Real-Time Digital Simulator (RTDS®). The results obtained from tests validate the proposed algorithms; and their capability to correctly detect and timely isolate faults without resulting in nuisance tripping of the DERs.
ISSN:0378-7796
1873-2046
DOI:10.1016/j.epsr.2021.107575