Abstract
This paper describes the modeling of definite time overcurrent relay using MATLAB/Simulink tool. The model is developed as a Simulink block which accepts input from the user to feed relay settings. The model is validated on Simulink for different values of pickup values and time delays. A hardware model implementation is carried out using ATMega328 microcontroller and ACS712 current sensor. The performance of the hardware model is tested on a radial feeder network with the backup protection relays operating at a time delay of 0.5 s. The results are satisfactory and accurate and therefore can be used in digital relays and applied in relay systems. In addition to this, a hardware model with different inverse definite minimum time characteristics is included along with different interfacing elements such as keypads, LCD, LEDs. The hardware model designed is ready to use for any overcurrent applications and shows accurate and satisfactory behavior.
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Acknowledgements
Special acknowledgments for G H Patel College of Engineering and Technology, Vallabh Vidhyanagar, India, for letting us to use switchgear and protection laboratory which helped us to do this research work.
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Mehta, P., Makwana, V.H. (2018). Radial Feeder Protection by Definite Time Overcurrent Relay. In: Kher, R., Gondaliya, D., Bhesaniya, M., Ladid, L., Atiquzzaman, M. (eds) Proceedings of the International Conference on Intelligent Systems and Signal Processing . Advances in Intelligent Systems and Computing, vol 671. Springer, Singapore. https://doi.org/10.1007/978-981-10-6977-2_17
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DOI: https://doi.org/10.1007/978-981-10-6977-2_17
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