交流电晕笼无线电干扰试验校准方法的讨论  

Discussion on Calibration Method of AC Corona Cage Radio Interference Measurement

作　　者：王晓燕[1,2] 邬雄[2] 赵建国[1] 张广洲[2] 陈豫朝[2] 

机构地区：[1]山东大学电气工程学院,济南250061 [2]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第1期112-117,共6页High Voltage Engineering

基　　金：国家电网公司科技项目(SG0861)~~

摘　　要：利用电晕笼试验可以获得不同型号导线的激发函数,进而估计导线电晕产生的无线电干扰水平。通常在进行无线电干扰试验之前要首先完成校准试验,获得校准因子、求取导线产生的全部射频电流,然后代入公式计算某种导线的激发函数。文中给出了两种校准试验方法:一种是电路分析方法,这种方法需要计算测量耦合回路各组成部分阻抗;另一种是试验方法,该方法采用稳定放电间隙完成对电晕源产生的电晕电流的测量。依据给出的两种方法,定义了理论校准因子、电容校准因子和试验校准因子3个概念。理论校准因子是电晕笼校准因子的上限,通过试验测量是无法得到的。电容校准因子可以通过测量导线与笼壁之间的电容获得,试验校准因子则需要通过放电试验结合电晕笼各部分的阻抗分析最终获得,电容校准因子和试验校准因子的结果可以相互印证。此外,还指出了影响校准试验因子精度的相关因素并与国际无线电干扰委员会提供的试验结果作了对比。Radio interference level can be estimated with excitation function by the use of corona cage experiment of diverse conductors.The influences of dimension of corona cage,calibration factor and full radio noise current generated by bundles should be obtained by calibration experiment before radio interference measurement.Consequently,we put forward two calibration methods,one is circuit analysis method in which impedance of each element of coupling circuit should be calculated,the other is test method in which corona current caused by stable spark-gap is measured.Based on the two methods,three calibration factors are defined,namely,the theory calibration factor,capacitance calibration factor,and experiment calibration factor.The maximum factor of each cage is theory calibration factor which can not be achieved by experiment measurement.Capacitance calibration factor is defined by calibration between bundles and test cage while experiment calibration factor can be got from spark experiment,and results are analyzed with impedance of each apartment of corona cage.Moreover,the identity of capacitance calibration factor and experiment calibration factor is confirmed,and some issues affecting the test precision of experiment calibration factor are introduced.The results are compared with the formula provided by International Special Committee on Radio Interference.

关 键 词：电晕笼 无线电干扰 激发函数 电晕电流 校准因子 耦合回路 

分 类 号：TM851[电气工程—高电压与绝缘技术]