POWER CONVERSION DEVICE WITH SETS ARRANGED IN PARALLEL

摘要

PROBLEM TO BE SOLVED: To make it possible to perform interrupting operation at high speed when any anomaly occurs in the direct-current voltage and the zero-phase current of a power converter and perform stable operation with very small influence of electromagnetic interference and the like.

SOLUTION: A power conversion device with sets arranged in parallel includes: power converters each having a PWM rectifier 3 and an inverter 4; a PWM rectifier-side arithmetic processing unit that carries out processing for the PWM rectifiers 3; and an inverter-side arithmetic processing unit that carries out processing for the inverters 4. The PWM rectifiers 3 and the inverters 4 are driven by the arithmetic processing units mounted on different control boards 6, 7. When one arithmetic processing unit detects any anomaly in the power conversion device, it transmits an anomaly detection signal to the other arithmetic processing unit through a relay 11 or a photocoupler.

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