基于紫外成像的电晕放电海拔因素的研究  

Study on the Altitude Factors of Corona Discharge Based on UV Imaging

作　　者：陈磊 邓慰[2,3] 周仿荣 李炼炼[2,3] 刘云鹏[4] 王胜辉[4] 鄢哲[2,3] 

机构地区：[1]云南电力试验研究院(集团)有限公司电力研究院,昆明650217 [2]国网电力科学研究院,武汉430074 [3]国家电网公司,北京100031 [4]华北电力大学,保定071003

出　　处：《电瓷避雷器》2013年第6期124-129,共6页Insulators and Surge Arresters

摘　　要：基于视频分析和图像处理的方法提取紫外成像放电区域的面积,并将其转化为表征电晕放电强度的参数,分别在高原地区(海拔为1 895 m)和平原地区(海拔为17 m)进行了棒-板间隙放电紫外成像特征的定量研究,分析了海拔高度对极不均匀电极模型间隙放电的影响。试验表明:在电压等级逐渐升高的情况下,高原地区较平原地区先出现明显的紫外成像光斑,即随着海拔高度的增加,起晕电压会降低;在相同的试验条件下,相同电压等级下高原地区的紫外成像光斑面积为平原地区的1.5～3倍,即随着海拔高度的增加,电晕放电强度会相应增加;相同的电压等级时,紫外成像仪的增益越小,高原地区与平原地区的紫外成像光斑面积比越大,即研究海拔因素时,还需考虑到增益的影响。Based on video analysis and image processing technology, the spot area in UV imaging was calculated, and it was selected as a corona discharge quantity parameter. At high altitudes （1895m） and the low altitudes （17m）, the UV imaging quantity test was carried on by rod-plate electrodes gaps discharge. The altitude as the influence on non-uniform field discharge gap model was studied. It showed that： With the increase of voltage, the UV imaging of high altitudes came first, in other words, the corona＇s onset was decreased as the altitude increased; Under the same test condition, the spot area in UV imaging at high altitudes was 1.5 to 3 times as that at low altitudes when the applied voltage was same. It meant that the corona current strength was increased as the increase of altitude. At the same voltage, the ratio of spot area in UV imaging between high altitude and low altitude increased as the gain of UV imaging instrument decreased. It meant that the gain of UV imaging instrument should be taken into account when studying the altitude factors on discharging current strength.

关 键 词：海拔因素 紫外成像 光斑面积 极不均匀电场 间隙放电 

分 类 号：TM855[电气工程—高电压与绝缘技术]