Adaptive Traveling Wave Protection Strategy for Distribution Network Based on SVMD and Temporal Homological Class Flux Mapping
To address the issues of maloperation and misjudgment in existing protection methods under highimpedance grounding, complex topologies, and non-fault transient disturbances, an adaptive traveling wave protection strategy for distribution networks based on Successive Variational Mode Decomposition (SVMD) and temporal homological class flux mapping is proposed. First, the signals acquired by broadband current sensors are processed with a 50 Hz notch filter, a high-pass filter, and an SVMD-wavelet threshold denoising procedure to eliminate interference, thereby ensuring the stability and reliability of the extracted topological features. Subsequently, the criterion of temporal homological class flux mapping is investigated to determine the adaptive traveling wave protection operation logic. Finally, a typical 10 kV radial distribution network model is built, and a comprehensive analysis of the proposed protection performance is conducted. The results demonstrate that the proposed method operates reliably and stably under various system configurations, fault locations, and fault resistances, meeting the requirements for practical engineering applications.