| 引用本文: | 王强,楼文娟,徐海巍,王礼祺.考虑时变气象参数的输电导线覆冰数值仿真[J].哈尔滨工业大学学报,2022,54(11):11.DOI:10.11918/202112105 |
| WANG Qiang,LOU Wenjuan,XU Haiwei,WANG Liqi.Numerical simulation of icing on transmission conductors considering time-varying meteorological parameters[J].Journal of Harbin Institute of Technology,2022,54(11):11.DOI:10.11918/202112105 |
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| 摘要: |
| 近年来输电线路覆冰灾害频发,给电网运行带来了极大威胁。现有研究大多未考虑时变气象条件对导线覆冰所产生的影响。为对线覆冰增长情况进行有效预测,给输电线路融冰除冰和舞动预警提供重要参考。本文基于导线覆冰机理和欧拉气液两相流模型,提出了考虑时变气象参数时变影响下的输电线路导线覆冰数值仿真方法。在此基础上建立了基于FLUENT和FENSAP-ICE软件的导线覆冰增长数值模拟框架,利用三维仿真模型,研究了温度、风速、空气中的液态水含量、水滴中值体积直径等时变气象参数和导线直径等因素对输电线路导线覆冰质量及覆冰形状的影响,结果表明导线覆冰形状受风速、过冷却水滴中值体积直径、空气中的液态含水量和导线直径影响较大,受温度影响较小。最终利用真实输电线路现场覆冰监测数据以及相应的气象数据对仿真计算方法的有效性进行了验证。预测结果与输电线路覆冰监测结果吻合度较好,考虑时变气象参数的方法比不考虑时变参数的方法更能有效地预测导线实时覆冰形状和质量,表明本文提出的导线覆冰仿真方法具有较好的精度。 |
| 关键词: 输电线路 导线覆冰 数值模拟 气象参数 时变 |
| DOI：10.11918/202112105 |
| 分类号:TM726.3 |
| 文献标识码:A |
| 基金项目:国家自然科学基金重点项目(51838012) |
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| Numerical simulation of icing on transmission conductors considering time-varying meteorological parameters |
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WANG Qiang,LOU Wenjuan,XU Haiwei,WANG Liqi
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(College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China)
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| Abstract: |
| Frequent icing disasters on transmission lines have brought a great threat to the power grids. Most existing studies ignored the effects of time-varying meteorological conditions. To effectively predict the growth in line icing and provide reference for transmission line deicing and early warning of galloping, on the basis of the icing mechanism of conductors and the Euler gas-liquid two-phase flow model, we proposed a numerical simulation method for icing of transmission lines under the influence of time-varying meteorological parameters. A numerical simulation framework of conductor icing growth was established based on FLUENT and FENSAP-ICE software. The influence of different parameters on the quality and shape of the ice coating on the conductor of the transmission line was analyzed using 3D simulation model. Results show that the ice coating shape of the conductor was greatly affected by the wind speed, the median volume diameter of the supercooled water droplet, the liquid water content in the air, and the diameter of the conductor, but little affected by temperature. Finally, the validity of the simulation calculation method was verified by using the on-site icing monitoring data of real transmission lines and the corresponding meteorological data. The prediction results were in good agreement with the monitored results of transmission line icing, indicating that the proposed method has good accuracy. |
| Key words: transmission conductors conductors icing numerical simulation meteorological parameter time-varying |
