학술논문
Phase-frequency characteristic of zero sequence networks in neutral indirectly grounded power system
Document Type
Conference
Author
Source
2009 44th International Universities Power Engineering Conference (UPEC) Universities Power Engineering Conference (UPEC), 2009 Proceedings of the 44th International. :1-5 Sep, 2009
Subject
Language
Abstract
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.