Protecting Distance between Radar Stations and UHV Power Transmission Lines

Jiangong Zhang1, Jiawei Yang2, *, Bo Tang2, Bin Hao2, Gan Zheyuan1
1 State Key Laboratory of Power Grid Environmental Protection, Wuhan Branch of China Electric Power Research Institute, Wuhan, 430074, China
2 College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei Province, China

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© 2018 Zhang et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei Province, China; Tel: 13669070675; E-mail:


With the construction of UHV (Ultra-High Voltage) transmission lines and radar stations, the interference of UHV transmission lines to air intelligence radar stations has become increasingly prominent. Aiming at the problem that it is difficult to solve the loss of radar detection range caused by UHV transmission lines, the idea of using RCS (Radar Cross Section) of UHV transmission towers as an intermediate parameter to solve the radar detection range loss is proposed. In order to solve the problem of accuracy when using Physical Optics (PO) to solve such electromagnetic scattering problems of complex structures, the traditional PO method needs to be improved when used in the calculation of the large-size’s scattering field like the UHV tower. It is proposed to use Incremental Length Diffraction Coefficient (ILDC) to revise the diffraction of the edge of the tower, and to study the coupling conditions with the PO method, so as to solve the scattering field of the complex structure of the tower. Based on this, 5 UHV transmission towers’ model is established to simulate the UHV transmission lines, and the regular variation of radar detection loss with the distance between the two systems is studied. These results show that when the distance between the UHV transmission lines and the radar station is more than 2200 m, the loss can reach within 0.9 dB of the standard, which is in line with the standard for the construction around the air intelligence radar station.


The issue of electromagnetic interference between UHV transmission lines and radar stations has become increasingly serious, the specification of guard spacing requires a study of radar detection losses.

Materials and Methods

In this study, RCS was used as an intermediate parameter to solve the radar detection loss, the PO-ILDC method was used to improve the accuracy of solving electromagnetic field.

Result and Conclusion:

The RCS-based detection power loss method proposed in this paper saves the resources and the economic cost to a certain extent. The PO-ILDC method is more accurate to solve the complex structure’s electromagnetic field.

When the UHV construction is adjacent to the radar station, according to the maximum frequency of the interference loss, it should be away from the radar station at least 2,200 meters.

Keywords: UHV power transmission lines, Air defense surveillance radar station, Electromagnetic interference, RCS, The detector distance, PO-ILDC.