Electromagnetic environment measurement and analysis of pantograph catenary arc along high-speed railway

Abstract

To analyze the amplitude frequency characteristics of the pantograph catenary arc along a high-speed railway line and evaluate the safety of the general public against electromagnetic exposure, field measurements were obtained at distances of 10 m, 20 m, and 30 m (points A, B, and C, respectively) from the center of a high-speed railway line. The distribution of electric field strengths at different distances was obtained by calculating and analyzing the measured data. The results showed that the frequencies of the pantograph catenary arc were mainly distributed in the range of 2~500 MHz, and there were some pulses in the range of 500~1 000 MHz. The frequencies of the maximum electric field strengths at different points were mainly distributed in the range of 12~16 MHz. The maximum electric field strengths at points A, B, and C were 21.8 mV/m, 18.1 mV/m, and 7.89 mV/m, respectively, which are significantly lower than the general public's limit of controlling the electromagnetic environment (GB 8702―2014) issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine. This indicates that the general public is safe at distances of 10 m, 20 m, and 30 m from the center of a high-speed railway line.

Keywords

• high-speed railway
• pantograph catenary arc
• amplitude frequency characteristics
• safety evaluation