载流体偏位对大尺寸Rogowski线圈雷电流测量结果的影响  

Influence of Lightning Current-carrying Bus Deviation on the Measured Results of Large Size Rogowski Coils

作　　者：颜楠楠[1] 傅正财[1] 李俊峰[2] 王常飞[2] 

机构地区：[1]上海交通大学电气工程系电力传输与功率变换控制教育部重点实验室,上海200240 [2]河南送变电建设公司,郑州450052

出　　处：《高电压技术》2013年第5期1142-1148,共7页High Voltage Engineering

摘　　要：为获取全雷电流波形,需在特高压输电杆塔等构筑物上直接安装Rogowski线圈对雷电流进行监测,但测量结果会因构筑物的存在而受到影响。为此,研究了大尺寸Rogowski线圈在载流体偏位情况下对测量结果的影响。讨论分析了2种不同尺寸线圈的频谱特性及其参数对频域的影响,并分别在载流体偏心和倾斜这2种情况下对Rogowski线圈测量结果所受的影响进行了试验研究。试验结果表明:载流体偏心对测量结果的影响不大,在0～30cm偏心距离(线圈内径为30cm)范围内线圈的测量相对误差均<4%;而载流体倾斜对测量结果的影响较大,在5kA冲击电流下,载流体倾角从0°变为60°时线圈的测量相对误差从1.17%增加到7.4%,在10kA冲击电流作用下,测量相对误差更大,从1.5%增加到17.9%。建议Rogowski线圈尽量垂直于载流体安装,同时载流体偏心距离小于线圈半径的30%时,偏心对线圈测量的影响在工程应用中可忽略。In order to obtain the current waveform of lightning,Rogowski coil is directly installed on tall structures such as UHV transmission line towers.However,the measured results are influenced by the structure involved.Thus,we investigated the effects of different current-carrying bus positions to a large size Rogowski coil on the measured results.The frequency spectrum characteristics of two different large size coils are analyzed,and the effects of coil parameters on the frequency band are also discussed.Moreover,the impact of current-carrying bus decentration and inclination on the results of Rogowski coil measurement is experimentally investigated.The experimental results show that the decentration has little impact on the measurement results（causing errors less than 4%） when the decentration distance is within 0~30 cm（the inner radius of coil is 30 cm）;but the inclination shows more significant impact： after the inclination angle changing to 60°from 0°,the error of measured current amplitude changes to 7.4% from 1.17% under 5 kA impulse current,and it changes to 17.9% from 1.5% under 10 kA impulse current.It is suggested that Rogowski coils should be located and installed perpendicular to target current-carrying buses,and that in engineering applications,the impact of decentration is ignorable when the decentration distance is less then 30% of the coil radius.

关 键 词：特高压(UHV) 大尺寸Rogowski线圈 频谱特性 载流体 位置影响 雷电流测量 

分 类 号：TM862[电气工程—高电压与绝缘技术]