NDLI: Instantaneous Value and Equal Transfer Processes-Based Current Differential Protection for Long Transmission Lines

Content Provider	IEEE Xplore Digital Library
Author	Minghao Wen Deshu Chen Xianggen Yin
Copyright Year	1986
Abstract	According to the theory of equal transfer process of transmission lines (ETPTL), the voltages along the line and the current through the line transformed by the same linear transferring link still satisfy the original distributed parameter-based transmission-line model. It is proved that the voltage signals near power frequency along the line follow the law of linear distribution. On the basis of the aforementioned analytical results, an ETPTL-based new current differential protection scheme for long transmission lines by using restructured instantaneous value was presented. The primary voltage and current experience equal transfer processes and are transformed to be virtual instantaneous values before they are used by differential protection. According to the instantaneous voltage value of the transmission line, the instantaneous values of the capacitive current can be calculated. After removing this current, the instantaneous value-based differential criterion can be implemented. The results of Alternate Transients Program simulation test results show that the proposed technique has highly reliability, fast speed, excellent performance under high-resistance earth-fault conditions, and phase selection ability.
Sponsorship	IEEE Power Engineering Society
Starting Page	289
Ending Page	299
Page Count	11
File Size	745585
File Format	PDF
ISSN	08858977
Volume Number	27
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power transmission lines Inductance Equivalent circuits Transient analysis Capacitance Capacitors virtual transfer method Coupling capacitor voltage transformer distributed capacitive current equal transfer process of transmission lines instantaneous value-based differential protection transmission line
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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