| 引用本文: | 刘艳,刘凯,石书祝,徐珂.特高压输电导线的X波段电磁散射特性[J].哈尔滨工业大学学报,2020,52(3):173.DOI:10.11918/201807180 |
| LIU Yan,LIU Kai,SHI Shuzhu,XU Ke.Electromagnetic scattering characteristics of ultra-high-voltage power transmission line at X-band frequencies[J].Journal of Harbin Institute of Technology,2020,52(3):173.DOI:10.11918/201807180 |
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| 摘要: |
| 为阐明特高压输电导线对X波段高分辨率合成孔径雷达卫星信号的电磁散射特性,首先分析了特高压输电导线的几何结构特征和材质,并基于悬链线方程建立导线的物理模型. 然后分析了特高压输电导线的X波段电磁散射特性,其中通过求解圆柱坐标系下的Helmholtz方程获得特高压输电导线的二维绕射系数,并利用增量长度绕射系数方法获得输电导线的三维绕射系数和三维雷达横截面积. 最后针对不同极化模式和不同导线直径,将特高压输电导线雷达横截面积（RCS）的理论计算结果与微波暗室测量结果进行对比分析. 结果表明:垂直-垂直和水平-水平极化模式下,不同直径特高压输电导线RCS理论计算结果与实际测量结果之间的最大平均相对误差为8.1%,初步验证了所提出的特高压输电导线X波段电磁散射特性分析方法的正确性. |
| 关键词: 合成孔径雷达 特高压输电导线 电磁散射 增量长度绕射系数 雷达横截面积 |
| DOI：10.11918/201807180 |
| 分类号:TN955 |
| 文献标识码:A |
| 基金项目:国家电网公司科技项目(GY71-17-043) |
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| Electromagnetic scattering characteristics of ultra-high-voltage power transmission line at X-band frequencies |
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LIU Yan1,LIU Kai1,SHI Shuzhu2,XU Ke3
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(1.State Key Laboratory of Power Grid Environmental Protection (Electric Power Research Institute), Wuhan 430074, China; 2. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China; 3. Heze Power Supply Company, State Grid Shandong Electric Power Company, Heze 274000, Shandong, China)
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| Abstract: |
| To illustrate the electromagnetic scattering characteristics of ultra-high-voltage power transmission line when it is illuminated by high-resolution synthetic aperture radar satellite working at X-band frequencies, the geometric structure and the material properties of ultra-high-voltage power transmission lines were first analyzed, and a physical model was developed for power lines based on the catenary equation. Then, the electromagnetic scattering characteristics of ultra-high-voltage power transmission line at X-band frequencies were analyzed, where the Helmholtz equation in cylindrical coordinates was solved to obtain the two-dimensional diffraction coefficient and, subsequently, the incremental length diffraction coefficient method was employed to acquire the three-dimensional diffraction coefficient and the radar cross section (RCS). Finally, taking into account different polarization modes and diameters of power line, the calculation results of the RCS of power line were compared with the measured anechoic chamber data. Analysis results show that a maximum mean error of 8.1% could be achieved for different diameters of power line, which preliminarily confirms the correctness of the proposed method when it is used for analyzing the electromagnetic scattering characteristics of ultra-high-voltage power transmission line at X-band frequencies. |
| Key words: synthetic aperture radar ultra-high-voltage power transmission line electromagnetic scattering incremental length diffraction coefficient radar cross section |
