特高压无补偿线路潜供电弧电气特征与弧柱形态  

Investigation on Electrical Characteristics and Arc Column Morphology of Secondary Arc on UHV Transmission Lines

作　　者：李润昌 刘洪顺[1,2] 娄杰 孙秋芹[3] 马昕[2] 李庆民[4] LI Runchang;LIU Hongshun;LOU Jie;SUN Qiuqin;MA Xin;LI Qingrnin(Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment, School of Electrical Engineering, Shandong University, Jinan 250061, China;School of Control Science and Engineering, Shandong University, Jinan 250061, China;College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China)

机构地区：[1]山东大学电气工程学院特高压输变电技术与装备山东省重点实验室,济南250061 [2]山东大学控制科学与工程学院,济南250061 [3]湖南大学电气与信息工程学院,长沙410082 [4]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《高电压技术》2018年第4期1359-1366,共8页High Voltage Engineering

基　　金：国家自然科学基金青年基金(51507095)~~

摘　　要：为研究潜供电弧电压–电流的电气特征与弧柱形态变化规律,搭建了特高压无补偿输电线路潜供电弧低压模拟实验平台。在此基础上,分析了潜供电弧电压和电流的电气特征,涉及暂态过程变化规律、放电功率和放电能量。当潜供电流为10、30 A时,放电功率最大值范围在2~3 MW之间,持续时间0.27~0.38 s。放电结束时,10、30 A潜供电弧放电能量达到9×10~9 J以上。除此以外,对实验电弧进行了二值掩膜图像处理,分析了其形心、电弧长度和电弧半径等弧柱形态。使用形心运动轨迹定量描述了电弧弧柱的运动,根据形心运动轨迹与链式电弧电流元受力分析,潜供电弧在电磁力作用下发生整体左右偏移;垂直方向上潜供电弧主要在热浮力作用下不断上升。对比实验结果与计算结果可知,实验电弧长度未超过相应熄弧时刻最大长度计算值;电弧直径的实验结果与计算结果在数量级上相符。In order to investigate the electrical characteristics of the voltage-current and the morphologic development of secondary arc,we built a low-voltage simulative experimental platform of secondary arc for UHV transmission lines without compensation.On the basis of the experimental platform,the electrical characteristics of the voltage and current were analyzed,involved with development rules of transient process,discharge power,and discharge energy of the secondary arc.When the secondary arc current is 10 A and 30 A,the maximum range of discharge power is in the range of 2~3 MW and its duration is about 0.27~0.38 s.When the discharge is over,the discharge energy of 10 A or 30 A secondary arc is greater than 9×10~9 J.In addition,binary mask image was processed,and the centroid,the arc length and the arc radius of the secondary arc were also analyzed.The centroid trajectory quantitatively describes the movement of the arc column,on the basis of the centroid trajectory and the force analysis of current element in cascaded chain model for secondary arc,the secondary arc shifts overall horizontally under the effect of the electromagnetic force and rises vertically mainly under the effect of the thermal buoyancy.By comparing the experimental results and computational results,the arc length does not exceed the corresponding maximum computation value of the arc length at arc extinction time.The experimental results of the arc radius is also consistent to its computation results in the order of magnitude.

关 键 词：特高压 潜供电弧 物理实验 弧柱运动 放电能量 

分 类 号：TM501.2[电气工程—电器]