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CONTROL METHOD FOR POWER CONVERTER FOR PARALLEL OPERATION, POWER CONVERTER FOR PARALLEL OPERATION, AND PARALLEL OPERATION POWER CONVERSION SYSTEM
CONTROL METHOD FOR POWER CONVERTER FOR PARALLEL OPERATION, POWER CONVERTER FOR PARALLEL OPERATION, AND PARALLEL OPERATION POWER CONVERSION SYSTEM
PROBLEM TO BE SOLVED: To provide a control method for a power converter for parallel operation that is operated in parallel with an external power converter by a three-phase voltage instruction, the control method reducing a circulating current flowing between power converters without using a special apparatus.;SOLUTION: The control method has: a first two-arm control step of fixing a switching operation in one phase out of three phases and carrying out PWM control in the other two phases; a three-arm control step of carrying out PWM control for a given time in three phases following the first two-arm control step; and a second two-arm control step of fixing a switching operation in a phase different from the phase in which the switching operation is fixed at the first two-arm control step and carrying out PWM control in the other two phases after the three-arm control step.;COPYRIGHT: (C)2012,JPO&INPIT
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