PARALLEL OPERATING APPARATUS OF TRAIN'S ASSIST POWER CONVERTER

摘要

A parallel operating apparatus of an auxiliary power converter for trains is provided to normally supply an auxiliary power regardless of malfunction of a specific auxiliary power converter by arranging four converter groups in two auxiliary power converters. A current value transceiving part(40) transmits/receives a DC output value to/from a computer of a control room. A correcting part(42) outputs a correcting voltage corresponding to the DC output value. An adder adds a DC voltage of a common output terminal of four converter groups to the correcting voltage outputted from the correcting part. A first subtracter subtracts a feedback DC voltage from the output voltage of the adder. A voltage control part(50) outputs a voltage for correcting the DC output. A multiplier multiplies the output voltage of the voltage control part by sintheta of a phase detecting part, and outputs a response current. A second subtracter subtracts a first feedback current from the response current of the multiplier. A first current control part(56) outputs a current for correcting the DC output. A first PWM(Pulse Width Modulation) signal generating part(58) generates a PWM signal corresponding to the output current of the first current control part.