A Two-Terminal Directional Protection Method for HVDC Transmission Lines of Current Fault Component Based on Improved VMD-Hilbert Transform

Shuhao Liu, Kunlun Han (), Hongzheng Li, Tengyue Zhang and Fengyuan Chen
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Shuhao Liu: Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530000, China
Kunlun Han: Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530000, China
Hongzheng Li: Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530000, China
Tengyue Zhang: Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530000, China
Fengyuan Chen: Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530000, China

Energies, 2023, vol. 16, issue 19, 1-21

Abstract: The traveling wave protection of high voltage direct current (HVDC) transmission lines is susceptible to the influence of transition resistance. As a backup protection, current differential protection has absolute selectivity, but usually requires an increase in delay to avoid misoperation caused by distributed capacitance on the line, resulting in a longer action time. Based on this, a two-terminal directional protection method for HVDC transmission lines is proposed based on Sparrow Search Algorithm (SSA)-Variational Mode Decomposition (VMD) and Hilbert phase difference. On the basis of analyzing the directional characteristics of the current fault component at both ends of the rectifier and inverter sides under different faults, SSA is first used to optimize the parameters of VMD. The residual components representing the direction of the current fault component at both ends are extracted through VMD, and then the Hilbert phase difference of the residual components at both ends is calculated to identify faults inside and outside the line area. In addition, fault pole selection can be achieved based on the ratio of the sum of multi-band Hilbert energy of single-terminal voltage fault components at the positive and negative poles. Simulation experiments have shown that the proposed protection scheme can quickly and effectively identify fault and has good tolerance to transition resistance and noise interference.

Keywords: HVDC; current and voltage fault components; Sparrow Search Algorithm; Variational Mode Decomposition; Hilbert transform; fault identification (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: 2023
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