摘要
试验线段可直接用于研究输电线路无线电干扰特性,在国内外得到了较为广泛的应用。与实际输电线路不同,试验线段电晕产生的无线电干扰电流在端部会产生反射,需要研究短线与长线无线电干扰频谱间存在的关系,以保证测试结果和数据分析方法的有效性。为此,基于无线电干扰电流传播机理建立计算模型,验证了短线测量无线电干扰的有效性,研究了试验线段无线电干扰的测量方法和数据分析方法,分析了不同终端特性(开路、短路、接电容)等效以及测量点对无线电干扰测量的影响。分析表明,这些方法都可以用于测量无线电干扰电流和空间无线电干扰。短线频谱上极大值和极小值的包络线取平均值就可以得到同样电晕电流情况下实际输电线路无线电干扰频谱。
With the improvement of voltage levels,radio interference caused by transmission line has attracted much attention.Test line can be directly used to study the transmission line radio interference characteristics,which provides a reliable basis for engineering design,and it has been more widely used at home and abroad.Which is different from actual transmission line at the connecting ends,test line radio interference current produced by corona will reflect at the end,and measurement results can＇t be directly applied to practical circuit.So we need to study the radio spectrum relationship between short and long lines,to ensure that test results and data analysis method is reliable.The model in this paper is based on the radio interference current spread mechanism,and the simulation results show the effectiveness of radio interference measurement on test line.It also gives the methods of measurement and data analysis of the radio interference on test line,the equivalent of different terminals（open circuit,short circuit,capacitors） and the impact of measuring points.These methods can be used to measure radio interference currents and space radio interference.The averaged envelope of spectrum on the short-term maximum and minimum values is the actual transmission line radio interference spectrum with same corona current circumstances.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第12期2978-2983,共6页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2011CB209402-4)~~
