Active filters for electric railways and their control methods, as well as power converters and railroad vehicles equipped with them.

摘要

PROBLEM TO BE SOLVED: To provide a power conversion device provided with an active filter for electric railways which reduces the amount of noise current flowing out to a wire while avoiding the possibility of disturbing a communication signal for vehicle control. SOLUTION: As an active filter for electric railway, an arm circuit composed of a smoothing capacitor and a transformer connected to an input side of an inverter for driving a vehicle acceleration / deceleration motor, a series circuit of semiconductor switching elements, and an arm circuit. A first current sensor that detects a first current that energizes between the harmonic filter circuit and the inverter, and a harmonic filter circuit that is connected in series between the and the transformer. The switching signal of the arm circuit is controlled based on the current detection signal of. [Selection diagram] Fig. 1