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

Qing Huai, Kaipei Liu, Liang Qin, Jian Le, Kun Wang, Shu Zhu, Yuye Li, Xiaobing Liao and Hua Ding
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Qing Huai: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Kaipei Liu: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Liang Qin: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Jian Le: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Kun Wang: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Shu Zhu: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Yuye Li: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Xiaobing Liao: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Hua Ding: State Grid Energy Conservation Service Co., Ltd., Beijing 100052, China

Energies, 2018, vol. 11, issue 6, 1-30

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.

Keywords: rapid fault diagnosis; AC line fault; BTB HVDC; MMC; discrete wavelet transform modulus maxima (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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