Modeling and simulation of inverse time overcurrent relay using Matlab/Simulink

Hussin, Nur Hafiz; Idris, Muhd Hafizi; Amirruddin, Melaty; Ahmad, Mohd Azmier; Ismail, Mohd Alif; Abdullah, F. S.; Mukhta, Nurhakimah Mohd

doi:10.1109/i2cacis.2016.7885286

Cited by 15 publications

(2 citation statements)

References 4 publications

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“…The fault signals are typically input to the relay. The popular relay protection types are overcurrent [1][2] and distance relays [3][4]. The overcurrent relay analyzes the current signal by comparing the current's magnitude against a predetermined setting.…”

Section: Introductionmentioning

confidence: 99%

Comparative Fault Detection Between DWT and STFT in Overcurrent Relays

Chiradeja,

Ananwattanaporn,

Lertwanitrot

et al. 2024

IEEE Access

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This study proposes a protection relay using a microcontroller to detect and classify faults in transmission lines based on the Wavelet transform. An experimental model was constructed from an actual 115 kV transmission system prototype. The current signal was observed based on the fault type, phase, and position. Clark's transform and the discrete Wavelet transform (DWT) were applied to transform signals for analysis. The positive and zero sequences obtained from Clark's transform were used for fault detection and fault classification, respectively. Moreover, the performances between the DWT and the short-time Fourier Transform (STFT) were compared in terms of accuracy and processing time. In addition, the double-detection technique was used to confirm the accuracy of fault detection. Results show that the proposed method is efficient for fault detection and classification. This finding allows the researcher to choose the appropriate analytical method. Moreover, it can also be used as the basis for overcurrent relay algorithm design in the effort to develop more advanced technologies.

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Section: Introductionmentioning

confidence: 99%

Comparative Fault Detection Between DWT and STFT in Overcurrent Relays

Chiradeja,

Ananwattanaporn,

Lertwanitrot

et al. 2024

IEEE Access

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“…By measuring the current value, an overcurrent relay detects a failure in the power system and separates the faulty zone from the rest of the system. It can be used to safeguard transmission or distribution feeders, transformers, bus couplers, and other components as either primary or secondary protection [5]. Fault analysis can aid in the selection and development of the appropriate protection apparatus.…”

Section: Introductionmentioning

confidence: 99%

An intelligent overcurrent relay to protect transmission lines based on artificial neural network

Al-jawady

Ibrahim

Khalaf

et al. 2023

IJPEDS

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Power systems are susceptible to faults due to system failures or natural calamities. This could be caused by damage to power system components, resulting in an interruption of power delivery to clients. Overcurrent relays are important relays that protect distribution feeders, transmission lines, transformers, and other components. The intelligent relay can perform both primary and secondary functions. Line-to-ground (L-G) faults are the most common occurrence in long transmission lines, posing a serious threat to electrical equipment. This article presents improved fault classification for transmission line overcurrent protection and highlights the use of artificial neural network (ANN) techniques to protect transmission lines of 100 km (terco type). An ANN is used to classify the faults. A back propagation neural network (BPNN) is used in this case. The neural network has been trained to classify faults in transmission lines for overcurrent protection. Various fault conditions are considered. In the event of a fault condition, the output of a neural network will be a tripping signal. The MATLAB neural network tool and the Simulink package are used to model the suggested method.

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