摘要
在电力系统中,电能质量问题将会直接影响发、供、用三方面的根本利益。而架空输电线路的运维质量与电力系统水平有密切关系,若能通过在线监测装置对放电现象做出判断,那么整个系统的安全稳定性能将会大大提高,由此架空输电线路放电现象的监查就显得格外重要。架空线路的放电以电晕放电为主,电晕放电通常表现为一种电磁脉冲信号,因此具有很宽的频带范围,它往往伴随着功率损耗、无线干扰或噪声污染等问题。由于检测电晕放电情况可反映线路运行状态并提供维护的参考信息,因此探究了射频电磁波检测天线的设计,选择200~300 MHz的放电检测频段,利用Hilbert分形天线原理和软件仿真研究了基层材料、阶数、馈电点位置、导线长度及导线宽度五种影响因素并进行了仿真,选取最优结果以得到最终的模型参数。
In the power system,the problem of power quality will directly affect the fundamental interests of power generation,supply and use.The operation and maintenance quality of overhead transmission line is closely related to the level of power system.If the discharge phenomenon can be judged by on-line monitoring device,the safety and stability of the whole system will be greatly improved.Therefore,the investigation of discharge phenomenon of overhead transmission line is particularly important.The discharge of overhead lines is mainly corona discharge.Corona discharge is usually an electromagnetic pulse signal,so it has a wide frequency band.It is often accompanied by power loss,wireless interference or noise pollution.The detection of corona discharge can reflect the operation state of the line and provide reference information for maintenance.In this paper,the design of RF electromagnetic wave detection antenna is explored.The discharge detection frequency band of 200~300 MHz is selected,and five influencing factors such as base material,order,feed point position,conductor length and conductor width are simulated by using Hilbert fractal antenna principle and software.The optimal results are selected to obtain the final model parameters.
作者
柳竺江
薛琰
田河
刘伟亮
LIU Zhujiang;XUE Yan;TIAN He;LIU Weiliang(Dongguan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Dongguan 523000,China)
出处
《电工技术》
2022年第5期128-131,共4页
Electric Engineering
