Abstract:
The Electromagnetic Transients Program (EMTP) after minor adaptation is utilized to simulate the grounded fault of a cable in a steel-pipe. The zero sequence impedance be...Show MoreMetadata
Abstract:
The Electromagnetic Transients Program (EMTP) after minor adaptation is utilized to simulate the grounded fault of a cable in a steel-pipe. The zero sequence impedance became nonlinear during the fault period, because the zero sequence current in a steel-pipe induced a magnetic saturation effect. Consequently, the zone protection of a cable in a steel-pipe has a serious error if a traditional distance relay is used. To correct this possible malfunction a novel idea using the proposed digital relay is presented. The physical zero sequence impedance will dynamically be modified according to the zero sequence current in case of a grounded fault. With such real cable data, an accurate fault location of cable in a steel-pipe is accordingly estimated.
Published in: Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137)
Date of Conference: 05-05 March 1998
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-4495-2
