NDLI: Line protection in inverter supplied networks

Content Provider	IEEE Xplore Digital Library
Author	Dewadasa, M. Ghosh, A. Ledwich, G.
Copyright Year	2008
Description	Author affiliation: Sch. of Eng. Syst., Queensland Univ. of Technol., Brisbane, QLD (Dewadasa, M.; Ghosh, A.; Ledwich, G.)
Abstract	New protection methods are required to protect a distribution system when supplied by current limited converters. In this paper, a method of converter control is proposed to limit the current by reducing the voltage in the faulted phase or phases while keeping the voltage of the healthy phases unaltered. Unsymmetrical fault analysis is performed to calculate the sequence currents and voltages at the relay location, when system is supplied by a converter. Based on that converter control, distance relay performances have been evaluated in both grid-connected and islanded mode operations. Distance relay, combined with MHO and negative sequence impedance directional characteristics, is proposed as a protection scheme for the distribution system for different types of faults under the current limited environment. The results are validated through PSCAD/EMTDC simulation and MATLAB calculations.
Starting Page	1
Ending Page	6
File Size	526945
Page Count	6
File Format	PDF
ISBN	9780733427152
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-14
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Univ of New South Wales
Subject Keyword	Performance evaluation Unsymmetrical faults Protective relaying Current supplies Inverters Voltage control PSCAD Apparent impedance Sequence components Performance analysis EMTDC Impedance Protection Distance protection
Content Type	Text
Resource Type	Article

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