Coordination of directional overcurrent relays in the interconnected power systems using effective tuning of harmony search algorithm

Rajput, Vipul N.; Pandya, Kartik S.

doi:10.1016/j.suscom.2017.05.002

Cited by 44 publications

(49 citation statements)

References 31 publications

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“…According to , one of the objective functions (OFs) that has been used in Noghabi et al and Bedekar and Bihde is the sum of operating times of primary relays.

OF = Min \sum_{i = 1}^{M} W_{i} . t_{pi}

where M is the total number of primary relays, t p is the operation time, and W is a weight coefficient for the operation of relay that is usually considered as equal to unity …”

Section: Modeling Of Optimal Coordination Of Docrmentioning

confidence: 99%

“…where M is the total number of primary relays, t p is the operation time, and W is a weight coefficient for the operation of relay that is usually considered as equal to unity. 28 As it is clear, in the OF above the operating time of backup relay is not taken into account. Therefore, the operating time of backup relay may be very high.…”

Section: The Objective Functionmentioning

confidence: 99%

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A robust approach for coordination of directional overcurrent relays in active radial and meshed distribution networks considering uncertainties

Shabani¹,

Karimi

2018

Int Trans Electr Energ Syst

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Summary Penetration of distributed generations in distribution networks (active distribution networks) has resulted in some problems such as change in short circuit level and direction of fault current flow. Such conditions may cause some relays to malfunction. In this paper, a method for coordinating directional overcurrent relays in active distribution networks taking uncertainties into consideration is proposed. These uncertainties include changes in operation conditions, changes in fault conditions, error in measuring equipment, and outage of distributed generations. Therefore, an optimization frame with new variables is presented, which can be used to create different characteristic curves. Taking uncertainties into account causes the number of constraints to increase and the problem of coordination of directional overcurrent relays to become more complicated. Thus, a two‐step approach is used to solve this problem. In the first step, an algorithm is used to form the constraints of the problem, then, in the second step, a hybrid optimization algorithm consisting of the cuckoo search algorithm and linear programming is proposed. The simulation results for active radial and meshed distribution networks are presented to demonstrate the effectiveness of the proposed approach.

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“…According to , one of the objective functions (OFs) that has been used in Noghabi et al and Bedekar and Bihde is the sum of operating times of primary relays.

OF = Min \sum_{i = 1}^{M} W_{i} . t_{pi}

where M is the total number of primary relays, t p is the operation time, and W is a weight coefficient for the operation of relay that is usually considered as equal to unity …”

Section: Modeling Of Optimal Coordination Of Docrmentioning

confidence: 99%

Section: The Objective Functionmentioning

confidence: 99%

A robust approach for coordination of directional overcurrent relays in active radial and meshed distribution networks considering uncertainties

Shabani¹,

Karimi

2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

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“…Traditionally, the subject of settings determination for directional overcurrent protection elements have focused on the problem of ensuring selectivity by proposing basic to advanced techniques for the proper coordination of these elements in transmission and distribution networks [4][5][6][7], thus leaving the definition of direction determination settings, such as the Relay Characteristic Angle (RCA), or the limits of directional regions (forward and reverse) to general guidelines and typical values [4], which, from the author's practical experience, have resulted, in some cases, in non-selective tripping for faults outside of the protected line, or non-tripping for certain fault conditions within the protected line, without performing further analysis oriented to evaluate the performance of the general settings criteria. Even in recent years, few publications [7][8][9][10][11] have been made on the subject of proposing settings or evaluating its performance in directional overcurrent elements based on fault simulations; however, they deal with very specific application problems of directional overcurrent elements, such as underground cable systems [7] or mutually-coupled transmission lines [9], cross country faults in medium voltage loops [10], and the impact of fault current limiters and wind turbines on the direction determination algorithms [11], without addressing the problem related to the determination or evaluation of the settings defining the performance of the direction determination algorithm.…”

Section: Introductionmentioning

confidence: 99%

Alternative Methodology to Calculate the Directional Characteristic Settings of Directional Overcurrent Relays in Transmission and Distribution Networks

Serna

López-Lezama

2019

Energies

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When addressing the problem of calculating the settings for directional overcurrent elements, the focus is usually the determination of the pickup, time dial and operating characteristic, in order to ensure proper selectivity with adjacent protection elements, thus limiting the problem related to the settings calculation of the direction determination characteristic to the application of typical settings and general guidelines, which cannot provide a reliable measure of the suitability of such settings. The present article describes in detail an alternative methodology for determining these settings, based on a characterization of the power system where the directional protection is to be applied, through the performance of a detailed short-circuit sensitivity analysis. From this, an optimization problem is formulated and solved to obtain the main settings shaping the direction determination characteristic, and then, a series of variables are used to measure the performance of the obtained settings, and even to improve it. The obtained results show the advantages of the application of the proposed methodology over the traditional methodology, based on typical settings and general guidelines, pointing out the risks of using the later.

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“…They are implemented for the same mission in other works . It is proven that effective tuning of heuristic algorithms can serve the purpose of offering fast response protection . In Alipour et al, group search optimization algorithm is improved to meet the coordination problem.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10][11] It is proven that effective tuning of heuristic algorithms can serve the purpose of offering fast response protection. 12 In Alipour et al, 2 group search optimization algorithm is improved to meet the coordination problem. Furthermore, some hybrid algorithms are explored in Radosavljević and Jevtić 13 and Sueiro et al 14 Chabanloo et al 15 proposed another formulation for the coordination problem in which time-current characteristics of DOCRs are selected optimally among available options for conventional relays.…”

Section: Introductionmentioning

confidence: 99%

Coordination of mixed distance and directional overcurrent relays: Miscoordination elimination by utilizing dual characteristics for DOCRs

Yazdaninejadi

Nazarpour

Talavat

2018

Int Trans Electr Energ Syst

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Summary Keeping selectivity among protective devices in electrical grids is of crucial importance. This task in the combinatorial protection scheme of distance and directional overcurrent relays (DOCRs) stands as a complicated problem, especially in interconnected networks. To overcome this issue, this paper proposes an enhanced protection coordination (PC) scheme by employing dual time‐current characteristics (D‐TCCs) for overcurrent relays which are followed by two inverse‐time curves in series. These characteristics simplify the complexity of the problem and yield higher flexibility and extensibility in PC process which helps to meet selectivity requirements. However, these characteristics can be implemented by numerical DOCRs which poses investment costs. Therefore, a techno‐economic optimal replacement model is devised to attain a least‐cost numerical DOCRs deployment plan while eliminating miscoordination and minimizing total operation time of the relays. Furthermore, inverse‐time curves of DOCRs are selected optimally among available options for conventional relays. By doing so, the attained flexibility is intensified which lessens imparted economic burden through alleviating the replacement level of numerical DOCRs. The proposed approach calls the need for making amendments in coordination points to handle coordination problem in the case where both conventional DOCRs and numerical DOCRs with D‐TCCs are present. Therefore, coupled with the conventional selectivity constraints, the constraint associated with new coordination points are all together accommodated in the optimization process. The proposed model demonstrates a mixed integer nonlinear programming fashion which is solved with sine‐cosine algorithm. Several numerical studies are carried out to interrogate the validity of the proposed approach. The obtained results are encouraging.

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Coordination of directional overcurrent relays in the interconnected power systems using effective tuning of harmony search algorithm

Cited by 44 publications

References 31 publications

A robust approach for coordination of directional overcurrent relays in active radial and meshed distribution networks considering uncertainties

A robust approach for coordination of directional overcurrent relays in active radial and meshed distribution networks considering uncertainties

Alternative Methodology to Calculate the Directional Characteristic Settings of Directional Overcurrent Relays in Transmission and Distribution Networks

Coordination of mixed distance and directional overcurrent relays: Miscoordination elimination by utilizing dual characteristics for DOCRs

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