Open AccessJournal Article
Relay Curve Selection Approach for Microgrid Optimal Protection
TLDR
In this paper, the authors proposed a curve optimization approach for microgrid protection, where a hybrid GA and linear programming method (LP) is also used for finding the optimal settings and curve of relays.Abstract:
Islanded and grid-connected are two working modes for microgrids, which they impose some challenges on overcurrent protection system. Microgrid Short Circuit (SC) level is different in both modes which causes maloperation of relays. Therefore, a new idea, relay, or method is necessary to solve this problem. This paper proposes a curve optimization approach for microgrid protection. Over Current Relays (OCRs) have different kinds, depended on their parameters like standard inverse and extremely inverse. SC variation in two modes of microgrid can be compensated by appropriate relay curve selection. In this paper, OCR curve optimization and selection is proposed for better protection coordination and microgrid protection. A hybrid Genetic Algorithm (GA) and linear programming method (LP) is also used for finding the optimal settings and curve of relays. Proposed method is applied to Canadian distribution benchmark and modified IEEE 14 bus. The results indicate that the OCR curve selection is efficient tool for microgrid protection coordination and fast fault detection..read more
Citations
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Journal ArticleDOI
Power system protection with digital overcurrent relays: a review of non-standard characteristics
Hasan Can Kilickiran,Hasan Can Kilickiran,Ibrahim Sengor,Hüseyin Akdemir,Bedri Kekezoglu,Ozan Erdinc,Ozan Erdinc,Nikolaos G. Paterakis +7 more
TL;DR: Based on the literature review, recommendations for further research in this area and a list of the requirements for devising robust non-standard relay characteristics are presented.
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Optimization of Size and Cost of Static VAR Compensator using Dragonfly Algorithm for Voltage Profile Improvement in Power Transmission Systems
J. Vanishree,V. Ramesh +1 more
TL;DR: The weakest buses for implementing the reactive power compensators at the weakest buses there are identified by eigenvalue decomposition technique on partitioned Y-admittance matrix and the size and cost of the SVC are optimized using dragonfly algorithm.
Proceedings ArticleDOI
Fault characterization and protective system design for a residential DC microgrid
TL;DR: This paper addresses discrimination of sudden short circuit faults using an ultra-fast normally-on Silicon Carbide (SiC) Junction Field Effect Transistor (JFET)-SiC based solid state circuit breaker (SSCB).
Journal ArticleDOI
A Non-Standard Characteristic Based Protection Scheme for Distribution Networks
TL;DR: This paper introduces a non-standard characteristic and then proffers an unconventional protection strategy, which utilizes a double characteristic, which is tested on the IEEE 14 Bus distribution system including synchronous generator based DG connection and shows that the proposed characteristic and protection scheme are able to provide a substantial decrease in the operation time of the relays while meeting the coordination requirements.
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Overcurrent Protection Assessment with high PV Penetration in a Distribution Network
TL;DR: The operational impacts study of PVs on the protection coordination which has been done for a satisfied backup and selectivity protection with a reliable and effective relay setting suggestion and some measures have been recommended as well to mitigate the PV impacts with an acceptable penetration level.
References
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Journal ArticleDOI
Microgrid Protection Using Communication-Assisted Digital Relays
TL;DR: In this article, a protection scheme using digital relays with a communication network is proposed for the protection of the microgrid system and the increased reliability of adding an additional line to form a loop structure is explored.
Journal ArticleDOI
Optimal Protection Coordination for Microgrids With Grid-Connected and Islanded Capability
TL;DR: A microgrid protection scheme that relies on optimally sizing fault current limiters and optimally setting directional overcurrent relays is proposed, and is tested on two medium-voltage networks.
Journal ArticleDOI
Optimum Coordination of Directional Overcurrent Relays Using the Hybrid GA-NLP Approach
P P Bedekar,S R Bhide +1 more
TL;DR: A hybrid method to overcome the drawback of GA and NLP method, and determine the optimum settings of OCRs is proposed.
Journal ArticleDOI
Considering Different Network Topologies in Optimal Overcurrent Relay Coordination Using a Hybrid GA
TL;DR: The results show a robust and optimal solution can be efficiently obtained by implementing the proposed hybrid GA method and a new hybrid method is introduced.
Journal ArticleDOI
A Modified Particle Swarm Optimizer for the Coordination of Directional Overcurrent Relays
TL;DR: The coordination of directional overcurrent relays (DOCR) is treated in this paper using particle swarm optimization (PSO), a recently proposed optimizer that utilizes the swarm behavior in searching for an optimum.