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Energies 2018, 11(3), 593; https://doi.org/10.3390/en11030593

Voltage Distribution–Based Fault Location for Half-Wavelength Transmission Line with Large-Scale Wind Power Integration in China

1
Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
2
Harbin Institute of Technology, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Received: 1 February 2018 / Revised: 26 February 2018 / Accepted: 1 March 2018 / Published: 8 March 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

Large-scale wind farms are generally far away from load centers, hence there is an urgent need for a large-capacity power transmission scheme for extremely long distances, such as half-wavelength transmission lines (HWTLs), which can usually span thousands of kilometers from large-scale wind farms to load centers. An accurate fault location method for HWTLs is needed to ensure safe and reliable operation. This paper presents the design of a modal voltage distribution–based asynchronous double-end fault location (MVD-ADFL) scheme, in which the phase voltages and currents are transformed to modal components through a Karenbauer transformation matrix. Then, the modal voltage distributions along transmission lines are calculated by voltage and current from double ends. Moreover, the minimums and intersection points of calculated modal voltages from double ends are defined as the fault location estimation. In order to identify incorrect fault location results and reduce calculation errors for the correct ones, air modal and earth modal voltage distributions are applied in the fault location estimations. Simulation results verify the effectiveness of the proposed approach under different fault resistances, distances, and types. Lastly, a real-time digital simulator (RTDS)–based hardware-in-the-loop (HIL) test is undertaken to validate the feasibility of implementing the proposed approach. View Full-Text
Keywords: half-wavelength transmission line; asynchronous double-end fault location; large-scale wind power integration; modal voltage distribution; hardware-in-the-loop test half-wavelength transmission line; asynchronous double-end fault location; large-scale wind power integration; modal voltage distribution; hardware-in-the-loop test
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Cao, P.; Shu, H.; Yang, B.; An, N.; Qiu, D.; Teng, W.; Dong, J. Voltage Distribution–Based Fault Location for Half-Wavelength Transmission Line with Large-Scale Wind Power Integration in China. Energies 2018, 11, 593.

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