FAULT LINE SELECTION AND LOCATION SCHEME OF FLEXIBLE DC DISTRIBUTION NETWORK BASED ON BWO-VMD

Dai Zhihui; Jiang Ying; Shi Chen; Shi Junyang; Yang Yishi

doi:10.19912/j.0254-0096.tynxb.2025-0318

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 663-674. DOI: 10.19912/j.0254-0096.tynxb.2025-0318

FAULT LINE SELECTION AND LOCATION SCHEME OF FLEXIBLE DC DISTRIBUTION NETWORK BASED ON BWO-VMD

Dai Zhihui, Jiang Ying, Shi Chen, Shi Junyang, Yang Yishi

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Abstract

This paper proposes a fault line selection and location method based on Variational Mode Decomposition （VMD） optimized by the Beluga Whale Optimization （BWO） algorithm. By constructing an objective function based on the quality factor, the BWO algorithm adaptively optimizes the VMD parameters, thereby enhancing the extraction capability of transient fault features. A transient energy criterion is established using the Intrinsic Mode Function （IMF） components of differential currents to accurately identify fault lines and fault types. Furthermore, the Teager Energy Operator （TEO） is employed to extract traveling-wave characteristics for high-precision fault location. A six-terminal ring-type flexible DC distribution network model is developed in PSCAD/EMTDC. Simulation results demonstrate that the proposed method achieves high accuracy and exhibits strong adaptability and robustness in fault line selection and location.

Key words

fault location / nonlinear signal processing / energy analysis / flexible DC distribution network / variational mode decomposition / beluga whale optimization

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Dai Zhihui, Jiang Ying, Shi Chen, Shi Junyang, Yang Yishi. FAULT LINE SELECTION AND LOCATION SCHEME OF FLEXIBLE DC DISTRIBUTION NETWORK BASED ON BWO-VMD[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 663-674 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0318

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