交流电晕笼无线电干扰校准试验研究  

Research on Calibration Experiments of Radio Interference With AC Corona Cages

作　　者：陈小月[1] 蓝磊[1] 裴春明[2] 肖国洲 文习山[1] 陈豫朝[2] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]中国电力科学研究院,湖北省武汉市430074

出　　处：《中国电机工程学报》2016年第11期3141-3148,共8页Proceedings of the CSEE

摘　　要：利用电晕笼进行无线电干扰的试验研究在国内外得到了广泛应用。其中无线电干扰试验结果的校准是很重要的工作内容之一。电晕笼中单点单脉冲电晕电流的模拟试验可以考虑单脉冲激励与测量回路响应之间的关系,并且能实际测量注入电晕电流的大小,是电晕笼无线电干扰试验的基础。该文搭建了电晕笼单点单脉冲电晕电流模拟试验平台,重现电晕笼中单点电晕时单个电晕脉冲的传播特性,在单个模拟电晕脉冲激励条件下,测量了两种常用的无线电干扰测量方式下电晕电流响应。并考虑全线起晕的情况,通过单个脉冲电晕电流与均匀起晕的总电流的关系,将单点电晕放电的试验结果计算推导得到电晕点均匀分布时测量得到的电晕电流,从而得到电晕笼试验的试验校准系数。实验结果与仿真结果有较好的一致性。其中,带耦合电容在电容侧测量方式下得到的信号最强,有利于保证测量精度,实验结果与仿真结果相对误差仅1.8%。Radio interference experimental method based on corona cage has been widely used at home and abroad, in which calibration of the results is one of the most important task of radio interference test. The single-point single-pulse corona current simulation experiment could consider the relationship between single-point pulse excitation and the response of test circuit. What is more, the single-point pulse excitation current could be observed in the simulation experiment, which is the foundation of calibration experiment. This paper presented a simulation experiment scheme for measurement of corona current in AC corona cage. In the condition of single-point pulse excitation, this paper measured the current responses in two common radio interference＇s measurement approaches by simulating the propagation characteristics of single-point corona pulse in corona cage. Considering the corona onset along the whole line evenly, this paper extended the experiment result of single-point corona discharge at different points to the total corona current along the whole conductor approximately. In this case, the test calibration factor of corona cage experiment was obtained. The experiment results are in good agreement with the simulation results with an error of 1.8% for the capacitance side with coupling capacitance case. The results also reveal that the signals which are measured at capacitance side in the experiment with coupling capacitance have the highest amplitude, from which the measurement accuracy may benefit.

关 键 词：电晕笼 电晕电流 单脉冲 无线电干扰 校准系数 模拟试验 

分 类 号：TM835[电气工程—高电压与绝缘技术]