电晕笼内多分裂导线电晕损耗

摘要

当输电线路的导线表面场强超过空气的击穿场强时,输电线路上就产生电晕放电,导线附近区域的空气放电产生热、光、可听噪声和无线电干扰等,同时伴随着大量的电晕损耗,系统研究线路电晕损耗及其影响因素具有重要的工程应用及理论价值.建立电晕笼内多分裂导线的平面及三维仿真模型,分别对2种模型下的多分裂导线表面电场进行仿真分析,研究了特高压大电晕笼防护段尺寸对多分裂导线表面场强的影响,从而确定大电晕笼防护段最佳尺寸.根据三维模型仿真结果,试验测量电晕笼内多分裂导线在不同降雨率下的电晕损耗,可作为实际线路电晕损耗估算的参考.%When the electric-field intensity on the transmission line conductor surface is bigger than the air breakdown strength, the corona discharge happens. The air near the conductor is punctured and heat, light, audible noise, radio interference and massive corona loss is produced. The systematic research on power line corona loss is very important to engineering application. 2D and 3D models of the corona cage is established and simulated to analyze the surface electric-field intensity of the bundle conductor. The influence of the protection section size of the corona cage on the electric-field intensity of the conductor surface is simulated to determine the optimal section size. Corona loss of the bundle conductor in the corona cage under different rainfall rate is measured based on the 3D model simulation results, which provides important reference for corona loss estimation.