Optimal coordination of directional overcurrent relays using improved mathematical formulation

Rajput, Vipul N.; Adelnia, Farhad; Pandya, Kartik S.

doi:10.1049/iet-gtd.2017.0945

Cited by 58 publications

(25 citation statements)

References 20 publications

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“…The value of TMS for the backup relays can be easily calculated using equation (4), which is deduced based on the equations (1) and (3).…”

Section: Constraintsmentioning

confidence: 99%

“…Definitely, each portion in the protected zones has a primary protection and backup protection for providing a high level of security for the electrical network systems [1], [2]. Protection devices should be coordinated such that: primary protection will provide the first defense to clear the faulty section, and if it fails the backup protection should operate after a predefined time interval called time margin (Δt) [3], [4].…”

Section: Introductionmentioning

confidence: 99%

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Analytical Method for Directional over Current Relays Coordination in Micro Grids

Abul’Wafa¹,

Mahmoud²,

Mohamed³

2019

IJRTE

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Microgrids are consisting of interconnected loads and distributed generators which can operate with and without utility. The significant implementation of microgrids challenged the protection engineers especially in designing protection microgrid schemes. This challenge comes from the bi-directional fault current variation and the dynamic behavior of microgrids. The implementation of artificial intelligent (AI) techniques for coordinating the directional overcurrent relays (DOCRs) in Microgrids (MGs) is a promising solution. However, all the (AI) techniques estimate the solutions and achieve the objective function after an extensive number of iterations. This paperwork proposes an analytical method for solving the coordination of (DOC) relays in meshed Microgrids which operates in grid connected mode. The proposed analytical method needs a lesser simulation time than the (AI) techniques to find the proper settings for the coordinated directional overcurrent relays (DOCRs). A file code is written using MATLAB software to implement and test this methodology. Index Terms: Analytical methodology, directional overcurrent (DOC) relays coordination, artificial intelligent (AI), microgrids (MGs).

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“…The value of TMS for the backup relays can be easily calculated using equation (4), which is deduced based on the equations (1) and (3).…”

Section: Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical Method for Directional over Current Relays Coordination in Micro Grids

Abul’Wafa¹,

Mahmoud²,

Mohamed³

2019

IJRTE

View full text Add to dashboard Cite

show abstract

“…In recent years, the access of large-scale new energy power further aggravates the influence of random factors on the power system. As the first line of defense to ensure the safety of the power grid, the reliable operation of the relay protection system is of great significance to the safety and stability of the power system, but its rejection and misoperation are also one of the important factors that trigger or accelerate the system disturbance (Rajput et al 2018). Therefore, researchers in this field have done a lot of research on it.…”

Section: Introductionmentioning

confidence: 99%

Relay Protection of Multilevel Differential Distribution Network Based on Feeder Segment Switch

Wang

2021

Preprint

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In order to solve the problems existing in the traditional relay protection methods, such as poor relay safety and large fault location error of distribution network, this paper proposes a multilevel differential relay protection method based on feeder segment switch. The configuration principle and the selection principle of multilevel range are determined, and the objective function of multilevel difference distribution network feeder segment switch configuration is set. After considering the target of economic benefit, the main feeder of distribution network is segmented and a contact switch is set at the end of the feeder. The equivalent topology of multilevel differential distribution network is analyzed to make the power supply at the first end of the line connected with the substation, which is regarded as the ideal voltage source. Considering the jurisdiction index of the switch, greedy algorithm is adopted to optimize the switch configuration of feeder segment. This paper analyzes the protection misoperation of multilevel differential distribution network and the sensitivity of feeder segment switch to realize the relay protection of multilevel differential distribution network. The experimental results show that the proposed method has higher safety and lower fault location accuracy, and is feasible to some extent.

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“…Heuristic methods such as particle swarm optimisation (PSO) [14], genetic algorithm (GA) [15–17], differential evolution (DE) algorithm [18–20], teaching learning‐based optimisation algorithm [21], seeker algorithm [22], biogeography‐based optimisation (BBO) algorithm [23], fuzzy‐based GA [24], an improved moth‐flame optimisation [25] and sine cosine algorithm [26] are introduced to determine the optimal settings of DOCRs.…”

Section: Introductionmentioning

confidence: 99%

Hybrid VNS–LP algorithm for online optimal coordination of directional overcurrent relays

Damchi

Dolatabadi

2020

IET Generation, Transmission & Distribution

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Optimal coordination of directional overcurrent relays using improved mathematical formulation

Cited by 58 publications

References 20 publications

Analytical Method for Directional over Current Relays Coordination in Micro Grids

Analytical Method for Directional over Current Relays Coordination in Micro Grids

Relay Protection of Multilevel Differential Distribution Network Based on Feeder Segment Switch

Hybrid VNS–LP algorithm for online optimal coordination of directional overcurrent relays

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