NDLI: Current differential relay characteristic for bipolar HVDC transmission line fault detection

Content Provider	IET Digital Library
Author	Saber, Ahmed Zeineldin, Hatem Fouly, Tarek El Durra, Ahmed Al
Abstract	This study proposes a new differential relay characteristic to detect internal faults on bipolar HVDC (high voltage direct current) transmission lines and discriminate accurately and in a timely manner both internal and external faults. In comparison with the conventional differential protection characteristic, the proposed relay characteristic avoids the need for an intentional time delay typically required to avoid nuisance fault detection. The sampling currents of the positive and negative poles are obtained from both line ends, and the noise is eliminated from the current signals using a stationary wavelet transform. Initially, a startup unit is utilised to activate the proposed protection scheme. The proposed current differential scheme adopts a biasing technique, which is based on the inherent transient behaviour of the bipolar HVDC system during both external and internal faults. The HVDC transmission line is implemented on the PSCAD/EMTDC platform utilising the frequency-dependent phase model, and it is tested considering numerous internal and external faults. Finally, the proposed current differential relay characteristic is tested considering different fault resistances up to 1000 Ω as well as different fault locations, including internal HVDC line faults and external faults at both rectifier and inverter sides. The obtained results confirm the robustness of the proposed protection scheme for bipolar HVDC transmission lines fault detection.
Starting Page	5505
Ending Page	5513
Page Count	9
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 23, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/23
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0556
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-09-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bipolar HVDC System Bipolar HVDC Transmission Line Fault Detection Conventional Differential Protection Characteristic Current Differential Relay Characteristic Current Differential Scheme Current Signal D.C. Transmission Different Fault Locations Different Fault Resistances Up to 1000 Ω External Fault Fault Diagnosis Fault Location High Voltage Direct Current HVDC Power Transmission Internal Fault Internal HVDC Line Fault Nuisance Fault Detection Power System Protection Power Transformer Protection Power Transmission Fault Power Transmission Line Power Transmission Protection Protection Scheme Relay Protection Sampling Current Timely Manner Both Internal Transformer And Reactors Wavelet Transform
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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