Review and Evaluation of Protection Issues and Solutions for Future Distribution Networks

Khan, Asif; Hong, Qiteng; Booth, Campbell

doi:10.1109/upec.2019.8893528

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…However, with the high penetration of distributed generation (DG) units into the DN, a conventional DN has substantially deteriorated specifically in terms of network protection [5][6][7][8]. Consequently, the relay sensitivity and selectivity have been disrupted due to the bidirectional current flow, which has ultimately caused the sympathetic tripping of the primary and backup protection and coordination failure with existing protection devices e.g., reclosure and fuse [9]. Moreover, it is alleged that the problems associated with DN protection are highly dependent on the network size and the type of integrated DGs.…”

Section: Background and Motivationmentioning

confidence: 99%

Optimal directional overcurrent relay coordination based on computational intelligence technique: a review

Ramli¹,

Usama²,

Mokhlis³

et al. 2021

Turkish Journal of Electrical Engineering and Computer Sciences

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An exponential increase in diverse load demand in the last decade has influenced the integration of more power plants into the power system. This increases the fault current due to the bidirectional flow of current, resulting in unwanted tripping of the relays if not properly coordinated. Therefore, it is imperative to ensure the installation of relays in the grid being able to sense the fault current from any direction (i.e. upstream or downstream). This can be accomplished by introducing an optimal directional overcurrent relay (DOCR) coordination scheme into the system. This paper presents an in-depth review of the applications of various optimization techniques for optimal coordination of directional overcurrent relays (DOCRs) in integrated power networks. The review highlights the advantages and limitations of techniques implemented to mitigate the DOCR coordination issues. Furthermore, potential research directions for optimal DOCR coordination are also discussed in this paper.

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Section: Background and Motivationmentioning

confidence: 99%

Optimal directional overcurrent relay coordination based on computational intelligence technique: a review

Ramli¹,

Usama²,

Mokhlis³

et al. 2021

Turkish Journal of Electrical Engineering and Computer Sciences

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“…only IIDG1 uses V/F (voltage and frequency) controller and rest of the IIDGs are PQ controlled. The detailed models of these controllers are discussed in [9]. Fig.…”

Section: Simulation Model Of Microgrid and Overcurrent Relaymentioning

confidence: 99%

Performance Analysis of the Overcurrent Protection for the Renewable Distributed Generation Dominated Microgrids

Khan

Hong

Booth

2020

2020 IEEE Region 10 Symposium (TENSYMP)

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This paper aims to present a study of the conventional protection scheme i.e. overcurrent (OC) protection's malfunctioning in the microgrids dominated by inverter interfaced distributed generator (IIDG) under a range of scenarios by injecting faults at different locations of the network. Due low cost and inherent backup protection, overcurrent protection scheme is generally used in the distribution network and microgrids. However, integration of IIDG in large number might introduce several protection challenges for microgrids. Different literature discusses the protection issues that might arise in microgrids due to addition of distributed generation, but those challenges are not practically studied. Hence, in this paper several fault cases by changing fault positions and using different combinations of IIDG in the network are simulated to fully explore the protection challenges and to analyze as well as to demonstrate the effectiveness of the overcurrent relays in the IIDG dominated microgrids.

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“…However, a normal DN has significantly degraded in terms of network protection due to the widespread adoption of DG units [8], [9], [10], [11]. Due to the bidirectional current flow, the sensitivity and selectivity factor of each relay has been compromised, resulting in unnecessary trip of the main and secondary protection schemes together with the coordination sequence of merging protection components such as breaker and fuse failed [12], [13]. Furthermore, it has been asserted that these issues with the protection of DN vary greatly depending on the scale of the network and the integrated DGs used.…”

Section: Introductionmentioning

confidence: 99%

The Recent Development of Optimal DOCR Protection Strategies for Sustainable Power Systems via Computational Intelligence Techniques

et al. 2022

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In the past decade, there has been unprecedented growth in distributed generation (DG) to cater to more load demand in the power grid. However, as the volume of these resources in the distribution network (DN) continues to increase, new challenges in voltage regulation, system stability, and protection coordination have emerged. The system is substantially changed when multiple types of DGs are incorporated into DN. These include new fault condition sources, different fault stages, a blinding influence on the protection scheme, a decrease in the relays' range, and a decline in the ability of existent relays to detect low-level fault currents. Due to the bidirectional current flow, this raises the fault current and, if improperly coordinated, causes the relays to trip unintentionally. Since fault current can flow in either direction (i.e. upstream or downstream), it is crucial that grid-mounted relays can detect it. This goal can be reached by including an optimal directional overcurrent relay (DOCR) coordination scheme in the system. In fact, DOCRs in interconnected power grids need to be coordinated effectively. This paper gives a comprehensive overview of the uses of various optimization strategies. The evaluation examines the benefits and drawbacks of the strategies used to address DOCR coordination problems. Additionally, this paper discusses future lines of inquiry for optimum DOCR coordination.INDEX TERMS Computational intelligence, directional overcurrent relay, distributed generation, distribution network, renewable energy resources. NOMENCLATURE TMS mTime multiplier setting. ROT RCOT ,k Characteristic operational time DOCR. TMS minMinimum range of time multiplier setting.

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Review and Evaluation of Protection Issues and Solutions for Future Distribution Networks

Cited by 7 publications

References 32 publications

Optimal directional overcurrent relay coordination based on computational intelligence technique: a review

Optimal directional overcurrent relay coordination based on computational intelligence technique: a review

Performance Analysis of the Overcurrent Protection for the Renewable Distributed Generation Dominated Microgrids

The Recent Development of Optimal DOCR Protection Strategies for Sustainable Power Systems via Computational Intelligence Techniques

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