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Energies 2018, 11(6), 1534; https://doi.org/10.3390/en11061534

Rapid Fault Diagnosis of a Back-to-Back MMC-HVDC Transmission System under AC Line Fault

1
School of Electrical Engineering, Wuhan University, Wuhan 430072, China
2
State Grid Energy Conservation Service Co., Ltd., Beijing 100052, China
*
Author to whom correspondence should be addressed.
Received: 12 May 2018 / Revised: 5 June 2018 / Accepted: 11 June 2018 / Published: 12 June 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

The integration of a modular multilevel converter-based high-voltage direct current (MMC-HVDC) transmission system in power networks has led to a high requirement for the rapidity of fault recognition. This study focused on the rapid fault diagnosis of an alternating current (AC) line fault in a back-to-back (BTB) MMC-HVDC system via fault detection and classification. Discrete wavelet transform and modulus maxima were applied to extract the fault features. Phase-mode transformation and normalization were adopted to widen the application range. Simulation and calculation results indicated that the proposed method can detect all fault types in an AC transmission line on the basis of single-side fault information within 1 ms under different values of transition resistance, fault inception angle, and fault distance. The BTB MMC-HVDC model was built using real-time laboratory (RT-LAB) based on the matrix laboratory (MATLAB) software platform, and the fault diagnosis algorithm was performed in MATLAB. View Full-Text
Keywords: rapid fault diagnosis; AC line fault; BTB HVDC; MMC; discrete wavelet transform modulus maxima rapid fault diagnosis; AC line fault; BTB HVDC; MMC; discrete wavelet transform modulus maxima
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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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Huai, Q.; Liu, K.; Qin, L.; Le, J.; Wang, K.; Zhu, S.; Li, Y.; Liao, X.; Ding, H. Rapid Fault Diagnosis of a Back-to-Back MMC-HVDC Transmission System under AC Line Fault. Energies 2018, 11, 1534.

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