Optimization and Engineering Verification of Transparent Connection Link Fault Tolerance for Icing Monitoring Terminals Based on Measured Field Data of Guizhou Power Grid
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Abstract
With rugged mountainous terrain and frequent freezing rain and icing weather across Guizhou Province, transmission line icing monitoring terminals upload field data via transparent communication links. Subject to mountain electromagnetic interference, low-temperature icing damage and tower construction destruction, such links frequently suffer disconnection, packet loss and excessive transmission delay. Most existing link fault tolerance schemes are developed based on laboratory simulation environments and poorly adapt to complex field operating conditions in Guizhou. Based on field measurement projects of multiple icing monitoring sites in Guizhou, this paper first sorts out inducements and distribution rules of transparent link faults for icing terminals and establishes a hierarchical fault statistical model for links. Afterwards, fault tolerance optimization strategies are designed from three dimensions including terminal hardware access, communication protocol parameter configuration and redundant link networking. Contrast tests before and after optimization are carried out at three key icing monitoring lines of Guizhou Power Grid with four groups of measured statistical tables for quantitative data analysis. Field engineering test results show that the proposed optimization reduces average single-fault duration by 62.7%, raises monthly link online rate from 83.1% to 97.6% and lifts the complete upload rate of icing monitoring data above 99%. The optimization approach fits the on-site deployment conditions of mountain power grids in Guizhou and provides engineering references for icing monitoring communication projects in multiple icing-prone regions across South China.
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