ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Asessment of the Disaster-Inducing Potential of Typhoon-Generated Winds on Overhead Transmission Lines
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
Summary: Based on China''s design codes for building structures and major overhead transmission lines, this study adopts the generalized extreme value distribution theory and historical surface meteorological monitoring data to calculate the return period basic wind speeds and basic wind pressures at 5-year, 10-year, 15-year, 30-year, 50-year and 100-year intervals for meteorological observation stations. This paper takes the wind pressure generated by the maximum typhoon wind and the extreme wind pressure generated by extreme gale as the disaster-inducing factors of typhoon gale for transmission lines, and establishes a disaster assessment model for transmission lines under typhoon gale by combining the wind pressure disaster threshold indicators of different types of transmission lines: low-voltage (≤1 kV), medium-voltage (10 kV–35 kV), high-voltage (66 kV–220 kV), and ultra-high voltage and above (≥330 kV). According to the impact of typhoon gale on transmission lines, the disaster level of typhoon gale on transmission lines is divided into four grades: medium, relatively high, high and extremely high, and the corresponding disaster impacts on low-voltage transmission lines, medium-voltage transmission lines, high-voltage transmission lines, ultra-high voltage and above transmission lines are specified. The disaster data from the meteorological disaster management system of the China Meteorological Administration between 2012 and 2023 are used to verify the rationality of the developed disaster assessment model for transmission lines under typhoon gale. Among the 205 samples with transmission line damage or power supply interruption caused by typhoons, the model identifies 183 samples with disaster risk on transmission lines, achieving an assessment accuracy of 89.3%. For the 162 samples of power disasters caused by typhoons of typhoon-level or above intensity landing in China, the model identifies 146 samples with disaster risk on transmission lines. Among these, the proportions of samples with medium, relatively high, high and extremely high grades in the total samples are 26.5%, 36.4%, 14.8% and 12.3% respectively, and the assessment accuracy reaches 90.1%, indicating that the overall performance of the model is satisfactory. The developed assessment model can conduct pre-disaster pre-assessment and rapid post-disaster assessment by combining typhoon forecast or real observation data, which provides scientific and technological support for typhoon meteorological services for the power industry.
Keywords:
Project Supported:
Clc Number:
Mobile website
