Power transformer differential protection using current and voltage ratios

Ali, Elsaeed; Helal, Ahmed A.; Desouki, Hussein; Shebl, Kamal M.; Abdelkader, Sobhy M.; Malik, O.P.

doi:10.1016/j.epsr.2017.08.026

Cited by 64 publications

(26 citation statements)

References 23 publications

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“…The combination of circuit breakers, relays and the appropriate relay coordination schemes using the traditional bus protection or artificial intelligence and expert systems [21][22][23][24][25] forms a protective system which may also incorporate automatic fault diagnosis and identification [26][27][28][29]. Protective devices and relays should be well coordinated to act fast and accurately to minimize damages when fault occurs [25,30].…”

Section: Power System Protectionmentioning

confidence: 99%

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Power distribution system fault monitoring device for supply networks in Nigeria

Kareem¹,

Adekitan²,

Awelewa³

2019

IJECE

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Electric power is the bedrock of our modern way of life. In Nigeria, power supply availability, sufficiency and reliability are major operational challenges. At the generation and transmission level, effort is made to ensure status monitoring and fault detection on the power network, but at the distribution level, particularly within domestic consumer communities there are no fault monitoring and detection devices except for HRC fuses at the feeder pillar. Unfortunately, these fuses are sometimes replaced by a copper wire bridge at some locations rendering the system unprotected and creating a great potential for transformer destruction on overload. This study is focused on designing an on-site power system monitoring device to be deployed on selected household entry power cables for detecting and indicating when phase off, low voltage, high voltage, over current, and blown fuse occurs on the building’s incomer line. The fault indication will help in reducing troubleshooting time and also ensure quick service restoration. After design implementation, the test result confirms design accuracy, device functionality and suitability as a low-cost solution to power supply system fault monitoring within local communities.

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Section: Power System Protectionmentioning

confidence: 99%

“…Transformers are the most expensive and critical power system component [12], and it requires utmost protection [30,31] to ensure longevity. Transformer failure may result in a lengthy and costly power outage.…”

Section: Power Transformer Protectionmentioning

confidence: 99%

Power distribution system fault monitoring device for supply networks in Nigeria

Kareem¹,

Adekitan²,

Awelewa³

2019

IJECE

View full text Add to dashboard Cite

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“…A voltage and current ratios‐based differential protection algorithm is presented in Ali et al Its effectiveness and reliability for transformer protection are verified by extensive simulation studies reported in Ali et al However, to enhance the confidence of utilities for the adoption of any theoretical scheme, it is imperative that the viability of any algorithm be demonstrated by implementation and real‐time tests conducted on a physical system. The objective of this paper is to implement and evaluate by experiments, under both normal and abnormal conditions, on a physical system the scheme proposed in Ali et al The real‐time implementation of the proposed scheme is carried out using dSPACE DS1104 and MATLAB/Simulink software. The purpose of using dSPACE is the advantage it offers in linking MATLAB/Simulink to real‐time hardware by introducing its input‐output (I/O) interface blocks into the Simulink model.…”

Section: Introductionmentioning

confidence: 99%

Experimental results of ratios‐based transformer differential protection scheme

Ali

Malik

Abdelkader

et al. 2019

Int Trans Electr Energ Syst

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Summary Implementation of a recently published current and voltage ratios‐based differential protection algorithm proposed for transformers and results of experimental tests carried out on a physical transformer are presented and analyzed in this paper. The implementation is done using dSPACE DS1104 and MATLAB/Simulink software. Experimental studies of transient phenomena, including transformer energization, sympathetic inrush, energization with simultaneous internal fault, external faults under saturation of current transformer, and internal faults of the power transformer, show that the proposed scheme provides accurate, secure, and reliable protection for power transformers.

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“…Differential current gradient vector-based technology [15] was involved in protective schemes of a transformer. Voltage and current ratio [16] based scheme is successfully integrated for inrush and fault discrimination. Power Differential Protection (PDP) [17] signals a new era for protection schemes, which successfully ensure wide area protection with large contingencies.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Monitoring & Adaptive Protection of Power Transformer to Enhance Smart Grid Reliability

Raichura

Chothani

Patel

2019

Electrical, Control and Communication Engineering

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Power transformer is one of the most important pieces of equipment in the grid to reliably and efficiently transmit power to the consumers. Asset management and protection are the best concepts for prolongation of transformer lifespan as well as for the increase of grid reliability. This article presents electrical and non-electrical parameter-based power transformer monitoring and protection. Various data such as core flux, age of asset, heat generation, current harmonics and temperature are monitored in real time and processed accordingly to enhance the working capability of the transformer. The proposed scheme is successfully tested on 15 kVA laboratory transformer using Arm CORTEX-M4 processor. A Fitness Function (Ff) is estimated from the collected data to examine the working condition of the transformer. Moreover, voltage, current and power-based inrush detection as well as Adaptive Power Differential Protection (APDP) are applied to protect the transformer against fault. The hardware implementation and result validation prove the effectiveness of the proposed scheme in enhancing reliability of the distribution grid.

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Power transformer differential protection using current and voltage ratios

Cited by 64 publications

References 23 publications

Power distribution system fault monitoring device for supply networks in Nigeria

Power distribution system fault monitoring device for supply networks in Nigeria

Experimental results of ratios‐based transformer differential protection scheme

Real-Time Monitoring & Adaptive Protection of Power Transformer to Enhance Smart Grid Reliability

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