Measurements of the electromagnetic interference beside CRH3

This paper measures and analyses the electromagnetic interference generated by pantograph catenary system of high-speed trains on the Wuhan-Guangzhou passenger line, mainly including the choice of location, the polarization and placement of the antenna, the instrument settings and so on. Through fully considering the sweep time, the discharge time and arc shape, the paper optimizes and improves the test method which has been defined in the standard of GB/T24338.2, then the article proposes an acquisition way which suitable for electromagnetic interference spectrum of high-speed train. Combined with the test data, the paper focuses on the influence which comes from the different polarization mode of log-periodic antenna and the influence of RBW (resolution bandwidth) for the spectrum curve and internal parameters, then put forward what the standard needs to improve further.