PENG Shiyi, LIAO Haoshuang, LIU Yuan, et al. High-voltage Disconnector Closing State Recognition Based on Multi-granularity Spatiotemporal Sequence Similarity Algorithm[J]. 2025, 53(6): 101-107.
PENG Shiyi, LIAO Haoshuang, LIU Yuan, et al. High-voltage Disconnector Closing State Recognition Based on Multi-granularity Spatiotemporal Sequence Similarity Algorithm[J]. 2025, 53(6): 101-107. DOI: 10.20204/j.sp.2025.06013.
High-voltage Disconnector Closing State Recognition Based on Multi-granularity Spatiotemporal Sequence Similarity Algorithm
Aiming at the dynamic variation characteristics of the drive motor power curve during the closing process of a GIS disconnector, this paper proposes a state recognition method based on the multi-granularity spatiotemporal sequence similarity algorithm (MGSSA). The algorithm introduces a dual-dimensional granularity adjustment mechanism in both time and space, enabling the synchronous perception of local anomalies and global trends in power curves by adjusting matching weights and gap penalties. Power data from normal and incomplete closing operations were collected on an experimental platform, and similarity calculations and discrepancy analyses were performed using MGSSA. Results demonstrate that this method achieves high accuracy and robust performance in detecting the terminal segment anomalies of power curves and identifying faults such as poor contact. Compared with traditional time-series comparison algorithms, MGSSA exhibits stronger adaptability under high-noise and non-stationary sequence conditions, making it suitable for the online recognition of disconnector closing states and fault early warning.
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