送電用鉄塔の発生軸力に基づく着雪時風速算定手法－関西電力送配電供給区域への適用－

カテゴリ：部門大会

論文No：065

グループ名：【B】令和7年電気学会電力・エネルギー部門大会

発行日：2025/9/5

タイトル(英語)：Wind Speed Estimation Method for Snow Resistance Design Based on Axial Forces of Transmission Tower: Application to the Supply Area of Kansai Transmission and Distribution

著者名：岡﨑友紀（電力中央研究所），松宮央登（電力中央研究所/京都大学），杉本聡一郎（電力中央研究所），早田直広（電力中央研究所），端本謙次（関西電力送配電），岸本泰昌（関西電力送配電）

著者名(英語)： Yuki Okazaki (Central Research Institute of Electric Power Industry), Hisato Matsumiya (Kyoto University), Soichiro Sugimoto (Central Research Institute of Electric Power Industry), Naohiro Soda (Central Research Institute of Electric Power Industry), Kenji Habamoto (Kansai Transmission and Distribution, Inc.), Yasumasa Kishimoto (Kansai Transmission and Distribution, Inc.)

キーワード：送電用鉄塔,着雪時風速,極値統計解析,transmission tower,wind speed for snow resisance design,extreme value analysis

要約(日本語)：In the snow resistance design of transmission towers, the weight of snow accretion on power lines and the wind loads that occur during snow accretion should be carefully evaluated. To determine the optimized design loads, we performed extreme value analyses of the axial forces of the tower members for 50 winter seasons spanning 1970–2020. In addition, the ‘required wind speed’ was calculated, which must act simultaneously with the design snow thickness specified in JEC-5101:2022 to determine the extreme values of the axial forces. Sensitivity analyses of the required wind speeds with respect to tower specifications were performed using three tower models typically used in Kansai Transmission and Distribution. We found that the required wind speed increases as the relative contribution of the wind load exceeds that of the snow accretion load. In the supply area of Kansai Transmission and Distribution, the most conservative wind speeds derived using this method are significantly lower than the values specified in JEC-5101:2022. Furthermore, the main members of the transmission tower tend to experience their quite heavy axial forces during light snow accretion periods accompanied by strong winds and not during heavy snow accretion periods.

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