A new objective function for adaptive distance and directional over-current relays coordination

Moravej, Zahra; Ardebili, Hemad Mohaghegh

doi:10.1002/etep.2592

Cited by 7 publications

(1 citation statement)

References 24 publications

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“…e faults occurred between 2017 and 2020. Each IED has a distance function as primary protection and a directional overcurrent function as backup [38]. e authors collected the line's impedance from the respective field IEDs to test the presented algorithm against the actual fault records, presented in Table 9.…”

Section: Actual Fault Recordsmentioning

confidence: 99%

Transmission Line Distance Protection Algorithm Based on Bayesian Inference

Tiferes

Manassero

2022

International Transactions on Electrical Energy Systems

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This paper presents a distance protection method based on estimating the resistances and inductances seen by the relay using a least-squares (LS) approach combined with the application of Bayesian inference (BI) to determine fault probabilities in the protected zone over time. The use of BI in the presented algorithm increases the security and reliability of the LS-based line protection approach, which, although fast, may yield impedance estimates with numerical inaccuracies and therefore configures a solution capable of detecting faults internal to the protected zone rapidly and dependably. The authors tested the proposed algorithm using data sets obtained from transmission line fault simulations performed in Alternative Transients Program (ATP), which considered noisy measurements, current transformer (CT) saturation, capacitive-coupling voltage transformer (CCVT) transients, switching onto fault, close-in faults, frequency variations, uncertainties in the line’s parameters, and power swings. Furthermore, the authors tested the presented method against measurements recorded by field protection equipment during seventy-nine actual fault events on four existing 500 [kV] lines. The results indicate that the proposed algorithm is a fast, secure, and reliable distance protection solution and that using BI to the LS-based distance protection approach increases security while maintaining fast fault detection.

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Section: Actual Fault Recordsmentioning

confidence: 99%

Transmission Line Distance Protection Algorithm Based on Bayesian Inference

Tiferes

Manassero

2022

International Transactions on Electrical Energy Systems

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Optimum Over Current Relays Coordination for Radial Distribution Networks Using Soft Computing Techniques

Godwal

Kanojia

Nimje

2022

Soft Computing and Optimization

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Optimizers for optimal coordination of distance relays and non-standard characteristics of directional overcurrent relays

2023

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In this paper, different methods are utilized to solve the coordination issue involving directional overcurrent relays (DOCRs) and distance relays. The proper coordination of DOCRs and distance relays is a critical issue for system security in electrical networks. Finding the DOCRs setting, pickup current(Ip) and timed dial setting (TDS), and operating time for zone-2 of distance relays is the primary objective of solving the coordination problem. The constant parameters A & B of the directional overcurrent relay that are responsible to control the form of the relay´s characteristics as well as the Ip and TDS have been regarded as variables in this problem. The optimal value for these four DOCR settings has been determined using different optimization techniques. The primary and backup relays must operate sequentially and without any violations, and this must be guaranteed by optimization techniques. In order to determine the operation time for zone-2 and DOCRs setting, optimization methods are examined utilizing the 8-bus and IEEE 30-bus networks. Different optimization algorithms, including recent and traditional techniques, are compared. The obtained results show the superiority of the genetic algorithm (GA) in solving the coordination problem of distance relays and DOCRs. Also, the obtained results prove the ability of the GA method compared to the particle swarm algorithm (PSO), grey wolf optimization (GWO), water cycle technique (WCA), equilibrium optimizer (EO), African vultures optimization algorithm (AVOA), flow direction algorithm (FDA), and gorilla troops optimizer (GTO) techniques.

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A new objective function for adaptive distance and directional over-current relays coordination

Cited by 7 publications

References 24 publications

Transmission Line Distance Protection Algorithm Based on Bayesian Inference

Transmission Line Distance Protection Algorithm Based on Bayesian Inference

Optimum Over Current Relays Coordination for Radial Distribution Networks Using Soft Computing Techniques

Optimizers for optimal coordination of distance relays and non-standard characteristics of directional overcurrent relays

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