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Phase-frequency characteristic of zero sequence networks in neutral indirectly grounded power system

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7 Author(s)
Zhang, W.G. ; Sch. of Electr. Eng., Xi''an Jiaotong Univ., Xi''an, China ; Zhang, B.H. ; You, M. ; Hu, H.S.
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In order to study phase-frequency characteristic of zero sequence current after single-phase earth fault in neutral indirectly grounded power system, this paper starts with the line model of distribution network, and analyzes phase-frequency character of zero sequence impedance for distributed parameter line model. By simulation analyzing, for a single feeder, the factors such as transmission line parameters, length, structure and branch can affect on the characteristic from different aspects. Further more, simulation in PSCAD analyzes phase-frequency character of zero sequence networks after earth fault, and the influence of neutral grounding mode on the character. The study of this paper provides a research basis for the fault line selection methods using transient zero sequence signals.

Published in:

Universities Power Engineering Conference (UPEC), 2009 Proceedings of the 44th International

Date of Conference:

1-4 Sept. 2009

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