Resonance mechanisms of a single line-to-ground fault on ungrounded systems

• Autorzy: Jiang Jun , Liu Ling

Identyfikatory

DOI

10.24425/aee.2020.133037

• Języki publikacji: EN

Abstrakty

EN

As for a single line-to-ground fault in an ungrounded distribution system, the power-frequency current is too low to detect the fault. The transient current is more palpable than that at a power-frequency of 50 or 60 Hz. It is an effective method to estimate the fault using the transient fault current. To analyze and calculate the transient current of single line-to-ground faults, an equivalent circuit is proposed in this paper. This model is based on distributed parameters of power lines. And it contains positive, negative and zero sequence information. The transient equivalent circuit consists of equivalent resistance, equivalent inductance and equivalent capacitance. And the method of calculation the equivalent elements is also submitted. MATLAB simulation results show that the new transient equivalent circuit has higher accuracy and stronger adaptability compared with the traditional one.

Słowa kluczowe

EN

power distribution faults; single line-to-ground fault; transient characteristics; ungrounded distribution system

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2020
• Tom: Vol. 69, nr 2
• Strony: 455--466
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wz.

Twórcy

autor

Jiang Jun

• Shandong Polytechnic China

autor

Liu Ling

• Shandong Polytechnic China

Bibliografia

• [1] C37.230-2007 –IEEE Guide for Protective Relay Applications to Distribution Lines, IEEE, 2008:1–100 (2008), DOI: 10.1109/IEEESTD.2007.4447926.
• [2] Short T.A., Electric Power Distribution Handbook, Second Edition, Boca Raton: CRC Press (2014).
• [3] Northcote-Green J., Wilson R.G., Control and automation of electrical power distribution systems, CRC Press, ISBN 9780824726317 – CAT# DK2951 (2006).
• [4] Venkatesh C., Swarup K.S., Steady-state error estimation in distance relay for single phase to ground fault in series-compensated parallel transmission lines, IET Generation Transmission and Distribution, vol. 8, no. 7, pp. 1318–1337 (2014).
• [5] Meng J. et al., Zero-sequence voltage trajectory analysis for unbalanced distribution networks on single-line-to-ground fault condition, Electric Power Systems Research, vol. 161, pp. 17–25 (2018).
• [6] Zhang X.-P., Chen H., Analysis and selection of transmission line models used in power system transient simulations, International Journal of Electrical Power and Energy Systems, vol. 17, no. 4, pp. 239–246 (1995).
• [7] Wang Peng et al., A novel neutral electromagnetic hybrid flexible grounding method in distribution networks, IEEE Transactions on Power Delivery, vol. 32, no. 3, pp. 1350–1358 (2017).
• [8] Lehtonen Matti, Tapio Hakola, Neutral earthing and power system protection: earthing solutions and protective relaying in medium voltage distribution networks, ABB Transmit (1996).
• [9] Xue Yongduan et al., Construction of Transient Equivalent Circuits of Single-phase Earth Fault for Isolated Neutral Systems, Proceedings of the CEE (in Chinese), vol. 33, no. 34, pp. 223–232 (2013).
• [10] Xue Yong Duan, Li J., Xu B.Y,. Transient equivalent circuit of single-phase earth faults on isolated neutral system, International Conference and Exhibition on Electricity Distribution IET, pp. 1–4 (2013), DOI: 10.1049/cp.2013.0741.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)