Patent ID: 9665110
Date: 2017-05-30
CPC Classifications: G05F,H02M

Claim:
1. A parallel current-sharing control method without a current-sharing bus, for implementing parallel current sharing of direct-current outputs of a plurality of power conversion submodules, wherein a voltage control module and a plurality of power conversion submodules are comprised, characterized in that: the voltage control module and the plurality of power conversion submodules having parallel outputs form an outer voltage loop, the voltage control module samples a terminal voltage signal output by the parallel power conversion submodules and outputs an outer voltage loop control signal to the power conversion submodules, and the power conversion submodules receive the outer voltage loop control signal; the power conversion submodules comprise respective inner current loops and sample respective current feedback signals to generate inner current loop control signals, and the inner current loop control signals are superposed with the outer voltage loop control signal to control output of the power conversion submodules.