DOI: https://doi.org/10.15407/techned2020.05.054

EARTH FAULT PROTECTION IMPROVEMENT ON DISTRIBUTION NETWORKS

Authors
V.F. Syvokobylenko*, V.A. Lysenko**
Donetsk National Technical University,
Shibankova sq., 2, Pokrovsk, Donetsk region, 85300, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript ; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
* ORCID ID : https://orcid.org/0000-0002-7720-0540
** ORCID ID : https://orcid.org/0000-0002-6411-3114

Abstract

The purpose of the article is to improve the single-phase earth fault protection for compensated electrical networks by eliminating the disadvantages of the known protection methods. The developed mathematical model revealed the possibility of non-selective protection operation due to the influence of aperiodic components in currents and voltages in transients. Insufficient sensitivity of protection at phase to earth faults due to active resistors greater than 10-20 ohms was also detected. The dependence of the reactive power on the frequency of the signals, isolated by the Hoertzel filters was obtained. These filters are taken as a basis because they require less computational cost than a discrete Fourier transform. It is suggested to perform differentiation before applying current and voltage of zero sequence to the frequency filters, which reduces the influence of aperiodic components on the phase errors of the relay and greatly enhances the useful signals. To increase the sensitivity of the relay when the phase is grounded through active resistance up to 100 Ohms, the relay circuit includes Hoertzel filters (for current and voltage) to select the components for two different frequencies (both higher than fundamental), and reactive power is found as the sum of power for the first and second frequencies. The sensitivity of enhanced protection algorithms compared to known algorithms is increased 10-20 times. References 13, figures 6, tables 2.

Key words: phase-to-earth fault, compensated electrical network, selective protection, Hoertzel algorithm, zero-sequence current and voltage, reactive power.

Received: 17.02.2020
Accepted: 26.06.2020
Published: 25.08.2020

References
1. Amin Ghaderi, Herbert L. Ginn, Hossein Ali Mohammadpour High impedance fault detection. Electric Power Systems Research. 2017. Vol. 143. Pp. 376-388. DOI: https://doi.org/10.1016/j.epsr.2016.10.021
2. Farughian A., Kumpulainen L., Kauhaniemi K. Review of methodologies for earth fault indication and location in compensated and unearthed MV distribution networks. Electric Power Systems Research. 2018. Vol. 154. Pp. 373-380. DOI: https://doi.org/10.1016/j.epsr.2017.09.006
3. Gururajapathy S.S., Mokhlis H., Illias H.A. Fault location and detection techniques in power distribution systems with distributed generation: A review. Renewable and Sustainable Energy Reviews. 2017. Vol. 74. Pp. 949-958. DOI: https://doi.org/10.1016/j.rser.2017.03.021
4. Santos W.C., Lopes F.V., Brito N.S.D., Souza B.A. High-Impedance Fault Identification on Distribution Networks. IEEE Transactions on Power Delivery. 2017. Vol. 32. No 1. Pp. 23-32. DOI: https://doi.org/10.1109/TPWRD.2016.2548942
5. Hajibandeh N., Faghihi F., Ranjbar H., Kazari H. Classifications of disturbances using wavelet transform and support vector machine. Turkish journal of electrical engineering & computer sciences. 2017. Vol. 25. Pp. 832-843. DOI: https://doi.org/10.3906/elk-1511-124
6. Xuan Z., Xie S., Sun Q. The Empirical Mode Decomposition Process of Non-stationary Signals. 2010 International Conference on Measuring Technology and Mechatronics Automation. Changsha City, 2010. Pp. 866-869. DOI: https://doi.org/10.1109/ICMTMA.2010.280
7. Altonen J., Wahlroos A., V#228;h#228;kuopus S. Application of Multi-Frequency Admittance-Based Fault Passage Indication in Practical Compensated Mv-Network. 24-th International Conference on Electricity Distribution. Glasgow, 2017. No 0967. DOI: https://doi.org/10.1049/oap-cired.2017.0967
8. Ha H., Subramanian S. Transient earth fault detection on compensated earthed system. 22th International Conference and Exhibition on Electricity Distribution. Stockholm, 2013. No 0119. DOI: https://doi.org/10.1049/cp.2013.0567
9. Kyrylenko O.V., Seheda M.S., Butkevych O.F., Mazur T.A. Mathematical modeling in power engineering. Lviv: Lvivska politekhnika, 2013. 608 p. (Ukr)
10. Pitot F., Venkataraman K., Vassilevsky N., Teon C.P. Wattmetric earth fault protection – innovation for compensated distribution networks 23rd International Conference on Electricity Distribution. Lyon, 2015. No 0963.
11. Syvokobylenko V.F., Lysenko V.A. Microprocessor selective protection from the phase to the earth fault in electric networks with petersen coil in neutral. Tekhnichna Elektrodynamika. 2019. No 2. Pp. 54-62. (Rus) DOI: https://doi.org/10.15407/techned2019.02.54
12. Michalik M., Rebizant W., Lukowicz M., Seung-Jae Lee, Sang-Hee Kang. High-impedance fault detection in distribution networks with use of wavelet-based algorithm. IEEE Transactions on Power Delivery, 2006. Vol. 21. No 4. Pp. 1793-1802. DOI: https://doi.org/10.1109/TPWRD.2006.874581
13. Syvokobylenko V.F., Derkachev S.V. Equivalent sinusoids method for digital measuring devices of relay protection. Zbirnyk naukovykh prats DonNTU. Seriia Obchysliuvalna tekhnika ta avtomatyzatsiia. 2015. No 1(28). Pp. 215-221. (Rus)

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