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Risk warning technology for the whole process of overhead transmission line trip caused by wildfire

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Abstract

Wildfire disasters on overhead transmission lines seriously threaten the safe and stable operation of large power grids and the normal use of electricity. After a wildfire occurs near a transmission line, it is often inefficient to take measures afterward. In order to guide the early warning of wildfire disasters on overhead transmission lines and strengthen the active prevention of them, this paper proposes a method for calculating the occurrence risk of overhead transmission line wildfires that considers the hazards of vegetation burning. Compared with conventional methods, the considerations are more comprehensive. A calculation method for wildfire trip risk coefficient based on tripping probability and transmission load that does not need to calculate the wildfire spread process is proposed, and the calculation is simpler. For the first time, a comprehensive calculation method for the whole-process tripping risk of overhead transmission lines caused by wildfires combined with the wildfire occurrence risk and the trip risk coefficient is proposed, compared with methods that calculated only the risk level of wildfires and ones that calculated only the tripping probability, comprehensively analyzing the entire process from the potential factors of wildfires to the danger of tripping, which is more scientific. Application cases showed that this method accurately reflected the risk of wildfire trips on overhead transmission lines, thereby guiding the optimization of the wildfire prevention resource deployment in advance and improving wildfire prevention in power grids.

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Acknowledgements

This work was supported by the State Grid Major S&T Project (NO. 5216A0180009). The authors would like to thank the Editor and the reviewers whose comments and suggestions have been very helpful in improving the quality of this study.

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Authors and Affiliations

  1. State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment, Changsha, China

    Yu Liu, Bo Li, Chuanping Wu, Baohui Chen & Tejun Zhou

  2. State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center, Changsha, 410007, China

    Yu Liu, Bo Li, Chuanping Wu, Baohui Chen & Tejun Zhou

Authors
  1. Yu Liu
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  2. Bo Li
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  3. Chuanping Wu
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  4. Baohui Chen
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  5. Tejun Zhou
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Contributions

Study conception and design were the work of YL, data collection was performed by CW and BL, data analysis was performed by YL, algorithm-performance testing was performed by BC, and the case study was performed by TZ and BL. The manuscript was written by YL.

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Correspondence to Yu Liu.

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Liu, Y., Li, B., Wu, C. et al. Risk warning technology for the whole process of overhead transmission line trip caused by wildfire. Nat Hazards 107, 195–212 (2021). https://doi.org/10.1007/s11069-021-04579-y

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  • DOI: https://doi.org/10.1007/s11069-021-04579-y

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