Optimal coordination of directional over current relays using a modified real coded genetic algorithm: A comparative study

Thakur, Manoj; Kumar, Anand

doi:10.1016/j.ijepes.2016.03.036

Cited by 51 publications

(28 citation statements)

References 47 publications

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“…To show the importance of considering all the required short-circuit types in different system topologies, protection coordination examples of an IEEE 6-bus [24] and a radial power system without distributed generation depicted in Figures 9 and 10, respectively, have been examined. The lines data used for calculations are entered in Tables 1 and 2.…”

Section: Protection Coordination Examplementioning

confidence: 99%

“…All the maximum short-circuit contributions considered in n i and m i nodes for all fault paths are entered in Tables 7 and 8. In the objective function design in Section 5 and in many publications, too [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], the selectivities met only in the primary and secondary nodes have been assumed. To verify the selectivity is met, not only in these nodes but in the entire protected section (between the primary and secondary nodes), different short-circuits placements have been explored in the protected section.…”

Section: Protection Coordination Examplementioning

confidence: 99%

“…For each protection, only one coefficient is looked for, and the linear programming can be used. Other publications [24][25][26][27][28][29][30] have dealt with the determination of time multipliers M Oi and pickup currents I pcOi with predetermined slope. In the latter, the optimization is nonlinear and a more sophisticated optimization method must be used.…”

mentioning

confidence: 99%

“…In the latter, the optimization is nonlinear and a more sophisticated optimization method must be used. However, all the aforementioned works [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] have mainly focused on the optimization process itself, but not much attention has been paid to choosing the proper short-circuit contributions types; additionally, only the maximum and minimum short-circuit contributions have been taken into account (and/or the current contributions values, without a calculation process description, have only been mentioned). As will be described in the article, the maximum and minimum short-circuit contributions can only be used if the short-circuit contributions flowing through primary and selective protections are the same.…”

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confidence: 99%

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Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Ehrenberger

Švec

2017

Energies

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This paper proposes a new approach to the distributed generation system protection coordination based on directional overcurrent protections with inverse-time characteristics. The key question of protection coordination is the determination of correct values of all inverse-time characteristics coefficients. The coefficients must be correctly chosen considering the sufficiently short tripping times and the sufficiently long selectivity times. In the paper a new approach to protection coordination is designed, in which not only some, but all the required types of short-circuit contributions are taken into account. In radial systems, if the pickup currents are correctly chosen, protection coordination for maximum contributions is enough to ensure selectivity times for all the required short-circuit types. In distributed generation systems, due to different contributions flowing through the primary and selective protections, coordination for maximum contributions is not enough, but all the short-circuit types must be taken into account, and the protection coordination becomes a complex problem. A possible solution to the problem, based on an appropriately designed optimization, has been proposed in the paper. By repeating a simple optimization considering only one short-circuit type, the protection coordination considering all the required short-circuit types has been achieved. To show the importance of considering all the types of short-circuit contributions, setting optimizations with one (the highest) and all the types of short-circuit contributions have been performed. Finally, selectivity time values are explored throughout the entire protected section, and both the settings are compared.

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Section: Protection Coordination Examplementioning

confidence: 99%

Section: Protection Coordination Examplementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Ehrenberger

Švec

2017

Energies

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“…At the stage of the selection process, each individual contained in the GA has the value obtained from the evaluation process. The value of the evaluation process is the value that will be used as a benchmark to get a good solution due to the highest value [8].…”

Section: Genetic Algorithm (Ga)mentioning

confidence: 99%

Cost Optimization of Multi-Level Multi-Product Distribution Using An Adaptive Genetic Algorithm

Sarwani

Mahmudy

Naba

2017

JITeCS

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Abstract. Distribution is the challenging and interesting problem to be solved. Distribution problems have many facets to be resolved because it is too complex problems such as limited multi-level with one product, one-level and multi-product even desirable in terms of cost also has several different versions. In this study is proposed using an adaptive genetic algorithm that proved able to acquire efficient and promising result than the classical genetic algorithm. As the study and the extension of the previous study, this study applies an adaptive genetic algorithm considering the problems of multi-level distribution and combination of various products. This study considers also the fixed cost and variable cost for each product for each level distributor. By using the adaptive genetic algorithm, the complexity of multi-level and multi-product distribution problems can be solved. Based on the cost, the adaptive genetic algorithm produces promising result compared to the existing algorithm

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References

2021

Optimal Coordination of Power Protective Devices With Illustrative Examples

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Optimal coordination of directional over current relays using a modified real coded genetic algorithm: A comparative study

Cited by 51 publications

References 47 publications

Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Cost Optimization of Multi-Level Multi-Product Distribution Using An Adaptive Genetic Algorithm

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