不同海拔高度交流电晕电流脉冲特性实验研究

刘永聪; 何旺龄; 刘兴发; 何泽宇; 蓝磊; 鲁海亮

刘永聪,何旺龄,刘兴发,何泽宇,蓝磊,鲁海亮.不同海拔高度交流电晕电流脉冲特性实验研究[J].电测与仪表,2024,61(2):41-48.
LIU Yongcong,HE Wangling,LIU Xingfa,HE Zeyu,LAN Lei,LU Hailiang.Experimental research on the characteristics of AC corona current pulse at different altitudes[J].Electrical Measurement & Instrumentation,2024,61(2):41-48.

不同海拔高度交流电晕电流脉冲特性实验研究

Experimental research on the characteristics of AC corona current pulse at different altitudes

DOI：10.19753/j.issn1001-1390.2024.02.006

中文关键词: 电磁环境海拔高度交流电晕特性小电晕笼电晕电流脉冲

英文关键词:electromagnetic environment, altitude, AC corona characteristics, small corona cage, corona current pulse

基金项目:国家自然科学基金资助项目（51507119）

作者中文名	作者英文名	单位
刘永聪	LIU Yongcong	武汉大学电气与自动化学院
何旺龄	HE Wangling	武汉大学电气与自动化学院；华北电力大学电力工程系
刘兴发	LIU Xingfa	电网环境保护国家重点实验室
何泽宇	HE Zeyu	武汉大学电气与自动化学院
蓝磊	LAN Lei	武汉大学电气与自动化学院
鲁海亮	LU Hailiang	武汉大学电气与自动化学院

摘要点击次数: 923

中文摘要:

不同海拔高度下交流电晕特性的变化规律是高海拔地区线路设计的基础。文章利用可移动式小电晕笼和高频电流测量系统在20 m~4 320 m范围内的5个海拔高度点进行实验，采集了1 mm直径细铜丝在不同施加电压下的电晕电流脉冲、无线电干扰和可听噪声水平数据；通过对实测数据的统计分析及拟合，得到了海拔高度对电晕电流脉冲特性的影响规律，并分析了不同海拔高度下电晕电流同无线电干扰和可听噪声水平的关联关系。研究表明，随着海拔高度增加，交流电晕电流脉冲的幅值增大，幅值概率分布逐渐分散，一个周期内交流电晕电流脉冲的数量增加，脉冲形成时间变得更加均匀；将电晕电流有效值作为中间变量，研究海拔高度对交流线路电晕效应的影响，得到电晕电流有效值与导线施加电压呈线性函数关系，该线性函数的斜率k、截距b均为海拔高度h的三次函数；无线电干扰和可听噪声水平均与电晕电流有效值呈对数增长关系，其中可听噪声与电流有效值的函数关系随海拔高度变化而改变。

英文摘要:

The changing law of AC corona characteristics at different altitudes is the basis of line design in high altitude areas. This paper uses a movable small corona cage and a high-frequency current measurement system to conduct experiments at 5 altitude points within the range of 20 m~4 320 m, and collects the corona current pulse, radio interference and audible noise level data of 1mm diameter thin copper wire under different applied voltages. And through statistical analysis and fitting of the measured data, the effect of altitude on the corona current pulse characteristics and the relationship between corona current and radio interference and audible noise level at different altitudes are obtained. Studies have shown that as the altitude increases, the amplitude of the AC corona current pulse increases, and the probability distribution of the amplitude gradually disperses. The number of AC corona current pulses in a cycle increases, and the pulse formation time becomes more uniform. By the RMS of corona current regarded as an intermediate variable, the influence of altitude on the corona effect of AC lines is studied, and the RMS of corona current is linearly related to the applied voltage of the wire. And the slope k and intercept b of this linear function are both cubic functions of altitude h. The radio interference and audible noise level has a logarithmic growth relationship with the RMS of the corona current, and the functional relationship between the audible noise and the RMS of the current changes with altitude.

查看全文查看/发表评论下载PDF阅读器

关闭