Study on Propagation Characteristics of High Frequency Signal in Medium Voltage XLPE Cable Joints
Study on Propagation Characteristics of High Frequency Signal in Medium Voltage XLPE Cable Joints
复制标题
高频信号在中压交联聚乙烯电缆接头中传播特性的研究
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Jianyong Lou
中科院分区：
文献类型：
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作者：
Zhongyi Jiang;Hongwen Liu;Ming Tang;Tiejun Xu;Jiandong Peng;Teng Chen;Jianyong Lou
本文利用CST软件对带接头的8.7/10kV XLPE电缆的传输特性进行了研究。基于有限积分法建立多电缆接头模型，重点研究衰减常数与相速度的关系。仿真结果表明，低频时衰减常数变化巨大，相速度剧烈抖动。值得一提的是，在0GHz到1GHz的频率范围内，有两个相速度变化不大的频段，分别是250MHz到350MHz和650MHz到850MHz。由于在250MHz～350MHz低频范围内衰减常数不大，因此信噪比较高。选择该频率范围内的信号将有助于提高局部放电检测的精度。
In this paper, propagation characteristics of the 8.7/10kV XLPE cable with joints are investigated by using the CST software. Establishing multiple cable joints model based on finite integral method, it focuses on the relationship between attenuation constant and phase velocity. The simulation results show that the phase velocity is violently shaken with the huge change of attenuation constant in low frequency. It is worth mentioning that in the frequency range from OGHz to 1GHz, there are two frequency bands with little change of phase velocity, which are range from 250MHz to 350MHz and from 650MHz to 850MHz. Since the attenuation constant is not large in the low frequency range from 250MHz to 350MHz, the Signal-to-Noise Ratio is high. It will be helpful to improve the accuracy of partial discharge detection if selecting the signal in this frequency range.