NDLI: Asynchronous fault location scheme for half-wavelength transmission lines based on propagation characteristics of voltage travelling waves

Content Provider	IET Digital Library
Author	Nan, Peng Menghan, Cheng Rui, Liang Zare, Firuz
Abstract	Due to prominent attenuation of travelling waves, double-end fault location method produces considerable errors when applied to ultra-high voltage AC half-wavelength transmission (UAHT) lines. In order to address this problem, this study presents a novel fault location scheme based on the attenuation, refraction and reflection principles of aerial-mode voltage travelling waves (AVTWs). In the scheme, the faulted section of an UAHT line is first determined according to the accumulated amplitude ratio of the pre-determined frequency components of AVTWs asynchronously sampled at both terminals of the line. Then, the Teager energy of the first two wavefronts of the AVTW – measured at the terminal in the faulted section – is used to define two factors for selecting the appropriate accurate fault location method. Finally, the single-end travelling wave method is adopted for locating the faults near the line terminal. The presented double-end method utilises the amplitude ratio of AVTWs to locate the faults far from the line terminal. A 1000 kV UAHT line model is considered with various fault conditions in PSCAD/EMTDC simulations. The simulation results and analysis demonstrate that the proposed fault location scheme is accurate and immune to fault distances, fault types, fault impedances and fault inception angles.
Starting Page	502
Ending Page	510
Page Count	9
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 4, Feb (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.5674
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-11-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Accumulated Amplitude Ratio Aerial-mode Voltage Appropriate Accurate Fault Location Method Asynchronous Fault Location Scheme AVTW Double-end Fault Location Method Double-end Method Fault Condition Fault Distances Fault Impedance Fault Inception Angles Fault Location Fault Location Scheme Fault Types Faulted Section Line Terminal Power System Protection Power Transmission Fault Power Transmission Line Power Transmission, Distribution And Supply Pre-determined Frequency Component Prominent Attenuation Reflection Principle Refraction Principle Single-end Travelling Wave Method Travelling Wave UAHT Line Ultra-high Voltage AC Half-wavelength Transmission Line Voltage 1000.0 KV
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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