Advanced Coordination Method for Overcurrent Protection Relays Using Nonstandard Tripping Characteristics

Keil, T.; Jaeger, Johann

doi:10.1109/tpwrd.2007.905337

Cited by 105 publications

(68 citation statements)

References 2 publications

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“…Application of random search technique (RST) for solving the relay coordination problems are also discussed in [38]. In [39], an advanced relay coordination method for over current relays using nonstandard tripping characteristics was applied successfully for solving the relay coordination problems.…”

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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“…By doing so, flexibility was introduced in the characteristics, nonetheless, the actual potential of microprocessor-based OCRs in terms of providing non-standard characteristics was not revealed. A logarithmic function based non-standard characteristic was proposed in [21]. The study showed that protection coordination could be achieved by utilizing a mathematical function, which is unfamiliar to protection literature.…”

Section: Relevant Literaturementioning

confidence: 99%

A Non-Standard Characteristic Based Protection Scheme for Distribution Networks

et al. 2018

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Abstract:The increasing number of distributed generation (DG) units in the distribution systems poses a challenge on protection systems in terms of coordination. In addition, the single characteristic based conventional protection causes an increase in the primary operation time of the relays due to the coordination between relay pairs. As a consequence, earlier studies investigated the utilization of non-standard characteristics and protection schemes in order to ease the insufficiencies of the standard approach. However, a commonly accepted protection approach that mitigates the effect of DG while providing lower primary operating time by levering the benefits of the non-standard protection strategy has not been developed so far. In order to overcome the aforementioned drawbacks of traditional protection, this paper firstly introduces a non-standard characteristic and then proffers an unconventional protection strategy, which utilizes a double characteristic.The suggested protection approach is tested on the IEEE 14 Bus distribution system including synchronous generator based DG connection. The results show 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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“…With the programmable feature of microprocessor-based relays, in [17][18][19][20][21] non-standard characteristics are proposed to improve the EDN protection in the presence of DG units. However, the proposed characteristics are not suitable for fuse saving applications.…”

Section: Proposed Recloser Characteristicmentioning

confidence: 99%

Self-Adaptive Relaying Scheme of Reclosers for Fuse Saving in Distribution Networks with DG

Jamali¹,

Borhani-Bahabadi²

2017

IJPER

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Abstract. With growing penetration of distributed generation (DG) in electrical distribution networks (EDNs), miscoordination between fuse and recloser is more likely. This is the result of change of direction, as well as the magnitude of the fault current in the presence of DG where fuse saving cannot be achievd with standard recloser characteristics. This paper proposes a self-adaptive relaying scheme of reclosing operation for fuse saving in EDNs with DG. The recloser is programmed with a new non-standard characteristic using only the local voltage and current magnitude measurements. The proposed relaying scheme is tested for various fault conditions in a 20 kV Iranian radial EDN containing DG units at different locations. It is shown that the proposed scheme is not affected by the presence of DG units whereas the conventional relays fail the protection coordination. The proposed characteristic maintains proper recloser-fuse coordination for all fault types and different DG conditions. Keywords: Fuse saving, distributed generation, electric distribution network, non-communication protection, self-adaptive relaying scheme IntroductionFuse saving is a common protection strategy that prevents nuisance fuse blowing during transient faults by fast operation of the recloser located at the head of a feeder before the blown up of its downstream fuses. After a predefined time, enough for the fault clearance, the recloser reenergises the feeder and restores the power supply. Since 50% to 80% of faults occurring in electrical distribution networks (EDNs) have transient nature [1], the fuse saving strategy can improve the system security and reliability. By incorporation of distributed generation (DG) units in EDNs, the fault current level and direction can change and cause miscoordination between the recloser and its downstream fuses. The fault current passing through the recloser decreases and at the same time the fuse fault current increases because of the DG contribution to the fuse fault current [2]. Therefore, the fuse may blow up before the fast operation of the recloser.Several methods are presented in the literature for fuse-recloser coordination in the presence of DG. In [3, 4] a complete study is carried out on a test EDN to find the best DG locations and also the best recloser setting to minimise the loss of coordination between the fuse and the recloser under different fault conditions. In order to achive the best location and size of DG, different cases must be studied by changing DG size and location for each possible fault location. This method needs to be tailored for each EDN individually. In addition, any change in the number of DG units, can cause a miscoordination between the recloser and fuses. Thus, it may be very time consuming or even infeasible to find the best DG location and related recloser setting for large EDNs.The method of [5] uses power electronic switches to disconnect all DG units after a fault inception and before any fuse blow up. This method does not require any upgrade of the prote...

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Advanced Coordination Method for Overcurrent Protection Relays Using Nonstandard Tripping Characteristics

Cited by 105 publications

References 2 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

A Non-Standard Characteristic Based Protection Scheme for Distribution Networks

Self-Adaptive Relaying Scheme of Reclosers for Fuse Saving in Distribution Networks with DG

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