Optimal coordination of directional overcurrent relays using a new time-current-voltage characteristic

Saleh, Khaled A.; Zeineldin, H. H.; Al-Hinai, Amer; El-Saadany, Ehab F.

doi:10.1109/pesgm.2016.7741830

Cited by 38 publications

(85 citation statements)

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“…A commonly used methodology was used for comparison purposes [17]. In this alternative methodology, the protection coordination problem is solved using a linear programming method, applied for a single operation scenario.…”

Section: Validation Of the Methodological Proposalmentioning

confidence: 99%

“…For instance, it has been shown that optimal linear programming can be used to optimize the time dial setting when the pickup current is previously defined using some heuristic rule [16]. In [17], a new time-current-voltage characteristic for directional relays was proposed. The new tripping characteristic integrates the fault voltage magnitude into the time-current curve, forming a three-dimensional tripping curve.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive Protection System for Microgrids Based on a Robust Optimization Strategy

et al. 2018

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Abstract:The development of a proper protection system is essential for the secure and reliable operation of microgrids. In this paper, a novel adaptive protection system for microgrids is presented. The protection scheme is based on a protective device that includes two directional elements which are operating in an interleaved manner, namely overcurrent and undervoltage elements. The proposed protection scheme can be implemented in microprocessor-based relays. To define the settings of the protective device, a robust programming approach was proposed considering a finite set of fault scenarios. The scenarios are generated based on the predictions about the available energy and the demand. For each decision step, a robust optimization problem is solved online, which is based on forecasting with a confidence band to represent the uncertainty. The system is tested and compared using real data sets from an existing microgrid in northern Chile. To assess the performance of the proposed protection system, fault scenarios not considered in the optimization were taken into account. The results obtained show that the proposed protective device is able to manage those failure scenarios, as well as those included in the tuning of the settings. Practical considerations are also discussed.

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Section: Validation Of the Methodological Proposalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adaptive Protection System for Microgrids Based on a Robust Optimization Strategy

et al. 2018

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“…In [112], the bidirectional fault flow is utilised for tripping of near end reverse relays as backup relay. This protection coordination scheme is achieved by dual relay setting for each relay.…”

Section: Dual Setting Protection Schemesmentioning

confidence: 99%

“…In microgrid modes it is observed that, there is small rise in load current from 110 to 150% during fault condition and simultaneously decrease in voltage below 80% of system voltage. In [112][113][114], a method is discussed which utilises the voltage and current signals for protection coordination application in DER connected distribution systems. The author has proposed a voltage-current time inverse protection scheme which can discriminate normal and fault condition in microgrid successfully.…”

Section: Voltage -Current Based Protection Schemesmentioning

confidence: 99%

Protection coordination in distribution systems with and without distributed energy resources- a review

Singh

2017

Prot Control Mod Power Syst

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Emission of greenhouse gases and depletion of fossil fuel reserves are two key drivers, which are forcing the mankind to generate the future energy demand from the renewable energy resources. These resources are generally distributed in nature and are directly integrated at distribution levels. Increasing penetration of the distributed energy resources in distribution power networks creates additional operational and control issues. These are mostly regulatory, economical load dispatching, power quality and protection issues. Generally power distribution systems are protected with the help of dedicated over current based protection schemes. But increasing share of distributed energy resources penetration in electric utilities poses a serious threat to the existing protection coordination schemes of the distribution systems. Distributed energy resources connected distribution networks become interconnected in nature and protection coordination schemes, which are designed for unidirectional flow of fault currents become ineffective/non-functional. Therefore, new protection coordination schemes are required for providing the adequate protection coordination for distributed energy resources connected electric power networks. In the available literature, the protection coordination schemes for radial distribution systems and developments in the area of protection coordination are discussed in detail. A thorough review for all these protection coordination schemes for distribution systems with and without distributed energy resources is done in this review article. It includes the analytical and artificial intelligence based techniques application for coordination of protective relays in the distribution systems. The limitations and research gaps in the area of protection coordination schemes are also presented in this review article. The aim of this research paper is to bring all the available research in the area of relay coordination on one platform, so that it will help the emerging researcher to identify the future scope of relay coordination application for distributed energy resources connected distribution systems.

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“…When these power generating resources are connected at remote end of utilities, these results in weak fault to the installed over current, which are set to operate for upstream large fault currents. Under these scenario, the over current relay based protection coordination scheme fails to discriminate between weak fault current and over load current feeded from the photovoltaic based system [9][10].…”

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confidence: 99%

Optimal protection coordination of voltage-current time based inverse relay for PV based distribution system

Tejeswini

Sujatha

2017

2017 Second International Conference on Electrical, Computer and Communication Technologies (ICECCT)

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Optimal coordination of directional overcurrent relays using a new time-current-voltage characteristic

Cited by 38 publications

References 0 publications

Adaptive Protection System for Microgrids Based on a Robust Optimization Strategy

Adaptive Protection System for Microgrids Based on a Robust Optimization Strategy

Protection coordination in distribution systems with and without distributed energy resources- a review

Optimal protection coordination of voltage-current time based inverse relay for PV based distribution system

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