为了探讨基于有限元法(FEM)的输电线路附近电场的三维分布特点,引入输电线路弧垂方程建立三维模型,计算松江洞泗线上500 k V等级的超高压输电线路的三维电场分布,并与模拟电荷法进行比对,验证了该计算方法的有效性;研究分析了相导线布...为了探讨基于有限元法(FEM)的输电线路附近电场的三维分布特点,引入输电线路弧垂方程建立三维模型,计算松江洞泗线上500 k V等级的超高压输电线路的三维电场分布,并与模拟电荷法进行比对,验证了该计算方法的有效性;研究分析了相导线布置方式、分裂导线尺寸、地形起伏等因素对空间电场强度和分布特征的影响;最后,将计算结果与多组实际测量结果进行对比,其电场强度变化趋势相近、分布特征一致,比二维模型计算结果与实际测量值的偏差从60. 94%缩小至9. 58%。为有限元法在输电线路附近三维空间电场的计算研究提供了重要的理论基础,并对工频电场计算和输电线路选址具有重要意义。展开更多
In the design of high voltage transmission lines inevitably needed to change the arrangement of wires, and the distance between the wires directly affected by changing the arrangement of the wires. The distance betwee...In the design of high voltage transmission lines inevitably needed to change the arrangement of wires, and the distance between the wires directly affected by changing the arrangement of the wires. The distance between the wires is difficult to judge by experiences. Therefore, it is urgently to develop a way to accurately calculating the minimum distance between the wires when changing the arrangement between the two wires, and determine the minimum distance can meet the requirements of standards and regulations or not. Through the thinking, based on the balance equation and the space curve wire calculus method, a more accurate method of calculating the two wires in a variety of conditions the minimum spacing was derivated, and the sensitivity of the minimum distance was analysized based on the method.展开更多
通过建立架空输电线路导线覆冰厚度的力学模型,推导出了导线覆冰厚度及导线弧垂计算公式。利用该公式计算±800 k V复奉线湖南区域导线覆冰厚度,与现场测试结果相比,计算误差为9.02%,可为提前预测导线覆冰厚度提供参考,还可为导线...通过建立架空输电线路导线覆冰厚度的力学模型,推导出了导线覆冰厚度及导线弧垂计算公式。利用该公式计算±800 k V复奉线湖南区域导线覆冰厚度,与现场测试结果相比,计算误差为9.02%,可为提前预测导线覆冰厚度提供参考,还可为导线覆冰防护提供预警。展开更多
文摘为了探讨基于有限元法(FEM)的输电线路附近电场的三维分布特点,引入输电线路弧垂方程建立三维模型,计算松江洞泗线上500 k V等级的超高压输电线路的三维电场分布,并与模拟电荷法进行比对,验证了该计算方法的有效性;研究分析了相导线布置方式、分裂导线尺寸、地形起伏等因素对空间电场强度和分布特征的影响;最后,将计算结果与多组实际测量结果进行对比,其电场强度变化趋势相近、分布特征一致,比二维模型计算结果与实际测量值的偏差从60. 94%缩小至9. 58%。为有限元法在输电线路附近三维空间电场的计算研究提供了重要的理论基础,并对工频电场计算和输电线路选址具有重要意义。
文摘In the design of high voltage transmission lines inevitably needed to change the arrangement of wires, and the distance between the wires directly affected by changing the arrangement of the wires. The distance between the wires is difficult to judge by experiences. Therefore, it is urgently to develop a way to accurately calculating the minimum distance between the wires when changing the arrangement between the two wires, and determine the minimum distance can meet the requirements of standards and regulations or not. Through the thinking, based on the balance equation and the space curve wire calculus method, a more accurate method of calculating the two wires in a variety of conditions the minimum spacing was derivated, and the sensitivity of the minimum distance was analysized based on the method.
