Adaptive Protection Coordination Scheme Using Numerical Directional Overcurrent Relays

Alam, Mahamad Nabab

doi:10.1109/tii.2018.2834474

Cited by 176 publications

(93 citation statements)

References 35 publications

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“…Proposed Algorithm 15.7139 This test framework is a highly distributed generator (DG) augmented distribution network comprising of 40 DOCRs as shown in Figure 13. Additionally, the three-phase short circuit framework and system details can be found in [53]. The proposed setting for current transformer ratios and for the relays is shown in Table…”

Section: Methods Objective Functionmentioning

confidence: 99%

Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems

et al. 2019

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In power systems protection, the optimal coordination of directional overcurrent relays (DOCRs) is of paramount importance. The coordination of DOCRs in a multi-loop power system is formulated as an optimization problem. The main objective of this paper is to develop the whale optimization algorithm (WOA) for the optimal coordination of DOCRs and minimize the sum of the operating times of all primary relays. The WOA is inspired by the bubble-net hunting strategy of humpback whales which leads toward global minima. The proposed algorithm has been applied to six IEEE test systems including the IEEE three-bus, eight-bus, nine-bus, 14-bus, 15-bus, and 30-bus test systems. Furthermore, the results obtained using the proposed WOA are compared with those obtained by other up-to-date algorithms. The obtained results show the effectiveness of the proposed WOA to minimize the relay operating time for the optimal coordination of DOCRs.

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Section: Methods Objective Functionmentioning

confidence: 99%

Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems

et al. 2019

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“…This method is tested for inverter‐based DGs and works well for coordinating primary and backup protection. Further, to design a robust scheme to operate under various operating conditions, an advanced strategy has been suggested in Alam . In this scheme, a real‐time online method is facilitated for designing a numerical directional relay integrated with an optimization technique and a communication channel.…”

Section: Protection Strategy For Microgridmentioning

confidence: 99%

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

2020

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Summary The integration of distributed energy resources (DERs) with conventional systems emerges as an intelligent solution for providing uninterrupted and secure power even at times of high load demand. Better load management with a mature fault handling mechanism makes AC a viable option which has an efficiency of 78.24%. In contrast with less power loss and slightly better efficiency of 84.6%, DC microgrid is a reliable option in a low power environment. In order to accommodate all operating conditions and load types, a hybrid system can be designed with a theoretical efficiency of more than 90%. Bidirectional power flows, low inertia, the transition between different modes of operations are the challenges for the protection of alternating current (AC) and direct current (DC) microgrid systems. Power balance fluctuation, absence of zero‐crossing currents, selection of suitable grounding, and coordination between different rating devices restrict the hybrid system to achieve the said efficiency constantly. This paper reviews in detail of existing protection along with grid‐connected algorithms for both modes of operation. Finally, the limitation, major hurdles, and future course of action for a reliable, efficient, and secure hybrid grid system are figured out.

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“…It consists of directional over-current relays with a changeable group of settings and high-speed, secure communication channels. It can be operated in both a centralised and decentralised manner whereby a microgrid's protective settings are updated either online or offline for each change in its topology [162]. In an offline process, all possible settings for different scenarios in a microgrid's grid-tied and islanded modes are first stored in a memory of a supervisory remote control unit (SRCU), then it analyses the microgrid's status to decide the settings of online relays for any change in the network's topology [163].…”

Section: Challenges Of Microgridsmentioning

confidence: 99%

Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

Hossain¹,

Pota²,

Hossain³

et al. 2018

Preprint

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Although microgrids facilitate the increased penetration of distributed generations (DGs) and improve the security of power supplies, they have some issues that need to be better understood and addressed before realising the full potential of microgrids. This paper presents a comprehensive list of challenges and opportunities supported by a literature review on the evolution of converter-based microgrids. The discussion in this paper presented with a view to establishing microgrids as distinct from the existing distribution systems. This is accomplished by, firstly, describing the challenges and benefits of using DG units in a distribution network and then those of microgrid ones. Also, the definitions, classifications and characteristics of microgrids are revised according to their specific roles to provide a sound basis for novice researchers to undertake ongoing research on microgrids.

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Adaptive Protection Coordination Scheme Using Numerical Directional Overcurrent Relays

Cited by 176 publications

References 35 publications

Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems

Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

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