Abstract
The problems of Electromagnetic Interference in Airborne Intelligence Radar Stations near the AC UHV Transmission Lines are researched in this paper, which is mainly active interference. The calculation method for the interferences is analysed, and then the proper protection distances of the AC UHV transmission line to the radar station are given. The paper analyzed the active interference of AC UHV transmission lines, and focuses on the active interference caused by the line corona on the active radar of nearby airborne intelligence when the transmission line is under normal operation. In the end, this paper proposes the recommended values of active interference protection distance for 1000kV AC UHV transmission lines and airborne intelligence radar stations.
Highlights
With the rapid development of current science and technology, UHF radio stations(such as analog TV and digital TV broadcasting station, military aviation radars, etc. ),which have strict requirements on the surrounding electromagnetic environment
The paper analyzed the active interference of AC UHV transmission lines, and focuses on the active interference caused by the line corona on the active radar of nearby airborne intelligence when the transmission line is under normal operation
The interference effects of high-voltage overhead transmission lines and substations considered in the electromagnetic environment protection criteria mainly come from two aspects: First, the high-voltage overhead transmission lines, substations, etc. in the live operation, will produce radio interference; Second, the high-voltage overhead transmission lines, towers and other facilities are used as obstacles, if they are too close to the radar station, it will destroy the requirement of the reflector surface of the radar array, which will cause the deformation of the radar lobe and affect the detection performance
Summary
With the rapid development of current science and technology, UHF radio stations(such as analog TV and digital TV broadcasting station, military aviation radars, etc. ),which have strict requirements on the surrounding electromagnetic environment. This paper proposes the recommended values of active interference protection distance for 1000kV AC UHV transmission lines and airborne intelligence radar stations. For the radio interference level of High-voltage overhead transmission lines above 30MHz, the above has mainly come from accidental factors such as sparks discharge of iron towers, insulators strings, and metal fittings. The measurement results show that the difference between the active radio interference generated by the UHV transmission line and the background noise is very small. The guard spacing is 1600m when the working frequency is 80MHz~300MHz; the guard distance for the radar up to the operating frequency of 300MHz~3000MHz is 1000m
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