Study on summation exponents of harmonic of electrified railway

This paper studies how to apply summation laws of harmonic proposed by IEC 61000-3-6 to electrified railway harmonic. It is be proved in this paper that the summation exponents in IEC 61000-3-6 are not suitable for summation of harmonic produced by electrified railway in utility based on statistic and calculation of a lot of measurement harmonic data of electrified railway. Summation exponents suitable for electrified railway harmonic are proposed in this paper. Simulation and calculation results prove that summation exponents proposed for electrified railway in this paper are more close to practice.