【摘要】 针对传统先导法对导线运行电压模拟与上行先导起始判断的不足,对上行先导起始判据进行改进,并建立先导发展模型。通过研究上行先导起始过程空间电场变化情况,得到了以平均场强为判据的改进上行先导起始模型,与Peek判据对比发现,传统先导模型夸大了雷云对先导的吸引能力。通过实例分析验证了所提模型的有效性,并应用所提模型分析输电线路绕击特性,提出雷电防护措施。更多还原

【Abstract】 Aiming at the shortcomings of the traditional pilot method in the simulation of wire operating voltage and the initial judgment of the upstream pilot,a pilot development model is estalbished. By studying the spatial electric field changes during the initial process of the upstream pilot,an improved upstream pilot initial model based on the average field strength is obtained. Compared with the Peek criterion,it is found that the traditional pilot model exaggerates the ability of thundercloud to attract the pilot. Case analysis verifies the validity of the model which is applied to analyze the shielding characteristics of transmission lines,and lightning protection measures are proposed.更多还原