Method for controlling voltage of direct current capacitors in double-output and three-switch-set MMC inverter
A technology of DC capacitor and three-switch group, which is applied to the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc. , to achieve the effect of solving the pressure equalization problem
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[0016] In order to further illustrate the content and characteristics of the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited thereto.
[0017] refer to figure 1 , dual-output single-phase three-switch group MMC inverter, including DC power supply U dc , the first capacitor C 1 , the second capacitor C 2 , the third capacitor C 3 , a switch bridge arm, a first load and a second load; the switch bridge arm consists of an upper switch group H, a middle switch group M, a lower switch group L and a coupled inductance ( L H :L L ) in series; the upper switch group H consists of N power switch units (SM H1 , SM H2 ,...,SM HN ) in series, and the middle switch group M consists of N power switch units (SM M1 , SM M2 ,...,SM MN ) in series, and the lower switch group L consists of N power switch units (SM L1 , SM L2 ...
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