电晕笼交流单根导线电晕损失的计算分析  

Calculation and Analysis on Corona Loss of AC Single Conductor in Corona Cage

作　　者：尤少华[1] 律方成[1] 刘云鹏[1] 万启发[2] 赵志斌[1] 

机构地区：[1]河北省输变电设备安全防御重点实验室(华北电力大学),河北省保定市071003 [2]国网电力科学研究院,湖北省武汉市430074

出　　处：《中国电机工程学报》2012年第1期162-170,4,共9页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2011CB209401);教育部霍英东教育基金基础性研究课题(121058);中央高校基本科研业务费专项资金(09ZG06);高等学校博士学科点专项科研基金(20100036110004)~~

摘　　要：电晕损失是导线电晕特性研究的重要内容之一。为了建立电晕笼内导线电晕损失的计算模型,将模拟电荷法应用于电晕笼内导线电晕损失计算。采用线电荷模拟交流导线,对正方型截面笼壁分别作镜像处理。当导线模拟电荷量超过起晕电荷量时,分别计算导线上每个模拟电荷点向空间发射的电荷量。考虑空间电荷的影响,计算电晕笼空间的合成电场。仿真模拟电荷发射、迁移、复合过程,计算电晕笼中空间电荷运动,计算迁移过程中电荷运动产生的能量损失。进行电晕笼单根光滑导线、单根钢芯铝绞线LGJ—300/40、单根钢芯铝绞线LGJ—400/35电晕损失测量试验。仿真结果与试验结果对比,结果基本一致。因此采用模拟电荷法能够较好地建立电晕笼内单根导线电晕损失的计算模型。Corona loss is an important content in the research of conductor characteristics. In order to establish a calculation model for corona loss of a conductor in a corona cage, the charge simulation method was applied. An AC conductor was simulated by line charges, which were mirrored by square section cage walls. As simulation charge exceeded corona onset charge, every simulation charge point launched charge to space respectively. Considering the impact of space charges, the total electric field strength in the corona cage was calculated. Charges＇ emission, migration and recombination were simulated; space charge＇s motion in the corona cage was calculated; and energy loss of charge movement was calculated. Corona losses of the single smooth conductor, the single stranded conductor LGJ-300/40, and the single stranded conductor LGJ-400/35, were measured in the corona cage. Comparison shows that simulation results are basically in agreement with test results; and therefore, the charge simulation method could be adopted to establish the corona loss calculation model for single conductors.

关 键 词：电晕笼 电晕损失 单根导线 模拟电荷法 空间电荷 计算模型 

分 类 号：TM835[电气工程—高电压与绝缘技术] TM851