High Harmonics Restraining Active Power Filter for AC Electric Vehicles

Takashi MAEDA; Tomoki WATANABE; Masanao SEKIMOTO; Katsuyoshi HOSHI; Takashi SHIOTA

doi:10.2219/rtriqr.41.26

PAPERS

High Harmonics Restraining Active Power Filter for AC Electric Vehicles

Takashi MAEDA, Tomoki WATANABE, Masanao SEKIMOTO, Katsuyoshi HOSHI, Takashi SHIOTA

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Keywords: AC electric motor vehicle, active power filter, reactance matrix, main transformer, harmonic current

JOURNAL FREE ACCESS

2000 Volume 41 Issue 1 Pages 26-31

DOI https://doi.org/10.2219/rtriqr.41.26

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Abstract

PWM-controlled line-side GTO converters of modern AC electric vehicles inject harmonic currents depending on their carrier frequency into the feeding overhead line. When they coincide with the variable resonance frequency of the line-distributed constants, the resonance currents become considerably high in amplitude and cause damage to the substations protection systems. Various counter-measures are taken to cope with this problem. In the case of trains equipped with a number of PWM converters, the problem is solved by the phase shifting operation method. For short trains, however, other solutions should be considered. Our proposal consists of parallel-connected active power filter. To verify the proposed method, a trial 200 kVA single-phase active power filter on board a vehicle was tested in the field and experimental results.

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