Design and Implementation of Overcurrent Protection Relay

Suliman, Mohammed Y.; Ghazal, Mohammed

doi:10.1007/s42835-020-00447-0

Cited by 16 publications

(3 citation statements)

References 20 publications

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“…Based on MATLAB, they introduced the modeling and simulation methods of the protection system and provided actual test results for different faults. Results found that relay protection could quickly respond to steady-state faults, distinguish the fault states, and isolate the faulty section without affecting other networks [ 15 ]. Abdel-Salam et al (2017) proposed a multifunctional digital relay.…”

Section: Literature Researchmentioning

confidence: 99%

A security technology of power relay using edge computing

2021

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The purposes are to find the techniques suitable for the safety relay protection of intelligent substations and discuss the applicability of edge computing in relay protection. Regarding relay protection in intelligent substations, edge computing and optimized simulated annealing algorithm (OSAA) are combined innovatively to form an edge computing strategy. On this basis, an edge computing model is proposed based on relay fault traveling waves. Under different computing shunt tasks, OSAA can converge after about 1,100 iterations, and its computing time is relatively short. As the global optimal time delay reaches 0.5295, the corresponding computing time is 456.27s, apparently better than the linear search method. The proposed model can reduce the computing time significantly, playing an active role in the safe shunting of power relays. The simulation also finds that the voltage and current waveforms corresponding to the fault state of Phase A are consistent with the actual situations. To sum up, this model provides a reference for improving and optimizing intelligent substation relay protection.

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Section: Literature Researchmentioning

confidence: 99%

A security technology of power relay using edge computing

2021

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“…To detect the fault current, it must firstly compare the alternating current value (I) of frequency (f) entering the OCR with the pre-set current constant value of the latter. For this, it is mandatory to convert the fundamental sinusoidal filtered signal of the current into DC form [14,15], and by measuring its slope (S) at zero crossing we obtain its peak value (I f ) as follows.…”

Section: Introductionmentioning

confidence: 99%

Modelling and performance testing of a digital over-current relay enhanced designed model

Sekhane

Djamel

Labed

2022

Electrical Engineering & Electromechanics

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Introduction. The over-current relay is widely used to protect distribution and transmission electrical systems against excessive currents occurring due to short circuit or overload conditions. Many works have been carried out in the field of models simulation design of digital over-current relays in the literature, but unfortunately many of them are more complex design models, have very slow execution time and only work in simple faults cases. Purpose. The purpose of this work is to present the performance of a modified and improved model of a digital over-current relay designed in Simulink/MATLAB environment with more simplified design, faster execution time, and able to operate under more complex fault conditions. Methodology. Before starting tests, modelling of over-current relay is presented in details, of which the basic logics of the proposed model to implement inverse and instantaneous characteristics are well explained. Afterwards, various tests are carried out for the performance analysis of the enhanced designed relay model in terms of: operating speed for eliminating faults that has arisen, ability to distinguish between a fault current and load starting current, capacity distinguish between real and temporary fault currents, the way to manage variable faults over time, and the degree of harmony between primary protection relay and back-up protection relay. Originality. The originality of our proposed work consists in the development and improvement of a digital over-current relay model designed in Simulink/MATLAB environment in such way that it becomes able to operate under new harsh test conditions. This developed designed model is implemented and applied in a 400V radial distribution power system with a load that causes a starting current. Results. The obtained values of simulation are compared with the theoretically calculated values and known existing models. The obtained results after various tests validate the good performance of our enhanced designed model.

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“…Several studies in many of last year's technique-based research have set out aims for effective HIF detection. These techniques involve the algorithm of frequency-time [11], multi-layer, neural-network feed-forward type [12], the Kalman-filter approach [13], the ratio of low order harmonics [14]. Wavelet transform WT has been extensively utilized for signal processing for its ability to detect the component of frequency and its position with time [15].…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Suliman,

Alkhayyat

2021

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Detecting high impedance faults (HIFs) is one of the challenging issues for electrical engineers. This type of fault occurs often when one of the overhead conductors is downed and makes contact with the ground, causing a high-voltage conductor to be within the reach of personnel. As the wavelet transform (WT) technique is a powerful tool for transient analysis of fault signals and gives information both on the time domain and frequency domain, this technique has been considered for an unconventional fault like high impedance fault. This paper presents a new technique that utilizes the features of energy contents in detail coefficients (D4 and D5) from the extracted current signal using a discrete wavelet transform in the multiresolution analysis (MRA). The adaptive neurofuzzy inference system (ANFIS) is utilized as a machine learning technique to discriminate HIF from other transient phenomena such as capacitor or load switching, the new protection designed scheme is fully analyzed using MATLAB feeding practical fault data. Simulation studies reveal that the proposed protection is able to detect HIFs in a distribution network with high reliability and can successfully differentiate high impedance faults from other transients.

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Design and Implementation of Overcurrent Protection Relay

Cited by 16 publications

References 20 publications

A security technology of power relay using edge computing

A security technology of power relay using edge computing

Modelling and performance testing of a digital over-current relay enhanced designed model

Archives of Electrical Engineering

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