A new optimal approach for coordination of overcurrent relays in interconnected power systems

Abyaneh, H.A.; Dabbagh, Hossein A.; Karegar, Hossein Kazemi; Sadeghi, S.H.H.; Khan, Rudaba

doi:10.1109/tpwrd.2002.803754

Cited by 151 publications

(95 citation statements)

References 15 publications

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“…Linear programming approach based on interval analysis concept was also used for solving the directional over current relays (DOCRs) coordination problems. These techniques also considers the effect of network uncertainty in defining the relay coordination problem [32,33]. In [34][35][36], linear programming methods were discussed in which constraints relaxation was also considered for optimal coordination of over current relays for interconnected power networks.…”

Section: Mathematical Based Optimization Methodsmentioning

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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Section: Mathematical Based Optimization Methodsmentioning

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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“…The pickup current limits are chosen so that the lower limit is equal to maximum load current after being multiplied by 1.3, and the upper limit is equal to the minimum fault current at the far end of the faulted bus [18].…”

Section: Optimization Of Relay Coordinationmentioning

confidence: 99%

An Optimized Adaptive Protection Scheme for Distribution Systems Penetrated with Distributed Generators

Osman

Hassan

Sulaiman

2014

Reliability Modeling and Analysis of Smart Power Systems

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“…In power transmission systems, these relays are considered a reliable and low cost alternative compared with distance or pilot relays [1,2]. Moreover, DOCRs are used for the protection of meshed distribution systems with possible integration of distributed generation (DG) units [3][4][5][6][7][8]. One of the main challenges while designing protection schemes is to ensure accurate coordination of all relays in a power system [9].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, in the literature, optimisation techniques have been commonly used to solve the protection coordination problem of interconnected systems [3][4][5][11][12][13][14][15][16][17][18][19]. In such studies, the DOCRs tripping times are governed by an inverse time-current characteristic.…”

Section: Introductionmentioning

confidence: 99%

Dual‐setting characteristic for directional overcurrent relays considering multiple fault locations

Saleh¹,

Zeineldin²,

Al-Hinai³

et al. 2015

IET Generation, Transmission & Distribution

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Optimal relay settings are determined where coordination constraints are modelled considering only either one fault location (near end or midpoint) or two fault locations (near and far end) on a feeder. This study, first, investigates whether considering one or two fault locations is sufficient to guarantee proper coordination for faults at all other locations on a feeder. The results show that violations, in the coordination constraints, can occur at various points along the feeder if the relays are coordinated considering one or two fault locations. In addition, considering multiple fault locations while determining the optimal relay setting can avoid such problem but on the expense of the overall relay tripping time. Thus, a dual-setting characteristic for directional overcurrent relays (DOCRs) is proposed instead of the conventional inverse time-current characteristic. The study is conducted on the power transmission system of IEEE 24-bus and the power distribution system of IEEE 14-bus. The proposed characteristic achieves notable reduction in total DOCRs operating time over the conventional characteristic for both test systems while achieving proper coordination across a broader range of possible fault locations.

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A new optimal approach for coordination of overcurrent relays in interconnected power systems

Cited by 151 publications

References 15 publications

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

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

An Optimized Adaptive Protection Scheme for Distribution Systems Penetrated with Distributed Generators

Dual‐setting characteristic for directional overcurrent relays considering multiple fault locations

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