| 引用本文: | 罗汶雯,王孟夏,张 强,杨 明,王明强.山火环境下架空导线热-力学状态模拟[J].电力系统保护与控制,2025,53(22):89-99.[点击复制] |
| LUO Wenwen,WANG Mengxia,ZHANG Qiang,YANG Ming,WANG Mingqiang.Thermal-mechanical state simulation of overhead conductors under wildfire conditions[J].Power System Protection and Control,2025,53(22):89-99[点击复制] |
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| 摘要: |
| 模拟山火环境下架空导线的热-力学状态，对评估输电走廊山火故障概率及电网运行风险具有重要价值。针对火灾环境下架空导线热力学状态的仿真需求，提出了山火环境下架空导线热-力学状态模拟方法。首先，分析了山火对架空导线热-力学状态的影响机理。然后，将火焰和烟气对导线的热辐射和热对流传热量融入架空导线的热平衡模型中。在此基础上，结合架空导线力学方程，构建了综合描述山火、导线载流及运行环境对架空导线热-力学状态影响的数学模型并求解，从而模拟了山火蔓延过程中给定时段内架空导线的温度、应力及弧垂。最后，通过算例分析验证了所提方法的有效性，并分析了山火环境下线路载流对导线热-力学状态的影响，为山火环境下输电线路对地放电概率估计、电网运行风险分析和安全控制决策提供支持。 |
| 关键词: 山火 架空导线 热-力学状态 热特性 弧垂 |
| DOI：10.19783/j.cnki.pspc.241737 |
| 投稿时间：2024-12-26修订日期：2025-04-22 |
| 基金项目:国家自然科学基金项目资助(52377106) |
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| Thermal-mechanical state simulation of overhead conductors under wildfire conditions |
| LUO Wenwen1,WANG Mengxia1,ZHANG Qiang2,YANG Ming1,WANG Mingqiang1 |
| (1. School of Electrical Engineering, Shandong University, Jinan 250061, China;
2. Shandong Power Dispatching and Control Center, Jinan 250022, China) |
| Abstract: |
| Simulating the thermal-mechanical state of overhead conductors under wildfire conditions is of great value for evaluating the probability of wildfire-induced faults in transmission corridors and assessing power grid operational risks. To meet the simulation requirements for the thermal-mechanical state of overhead conductors in wildfire environments, a thermal-mechanical state simulation method for overhead conductors under wildfire conditions is proposed. First, the influence mechanism of wildfires on the thermal-mechanical state of overhead conductors is analyzed. Then, the thermal radiation and convective heat transfer from flames and smoke are incorporated into the conductor thermal balance model. On this basis, the mechanical equations of the conductors are coupled to construct and solve a comprehensive mathematical model that describes the combined effects of wildfire, current loading, and environmental conditions on the thermo-mechanical state of overhead conductors. This allows the simulation of conductor temperature, stress, and sag within a given time period during wildfire spreading. Finally, case studies verify the effectiveness of the proposed method and analyze the impact of line current loading on the conductor’s thermal-mechanical state under wildfire conditions. The results provide technical support for estimating ground discharge probability, assessing power grid operational risks, and developing safety control strategies for transmission lines exposed to wildfires. |
| Key words: wildfire overhead conductors thermal-mechanical state thermal characteristics sag |
