mmc flying capacitor sub-module capacitor voltage balance control method
A capacitor voltage, flying capacitor technology, applied in electrical components, output power conversion devices, AC power input conversion to DC power output, etc. Hardware requirements and other issues to achieve the effect of reducing computational complexity, reducing rated voltage, and improving stability
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[0031] The method for controlling the capacitor voltage balance of the MMC flying capacitor sub-module of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.
[0032] Such as figure 1 As shown, the structure of the modular multilevel converter includes phase-parallel A-phase bridge arms, B-phase bridge arms and C-phase bridge arms. The A-phase bridge arm is composed of the A-phase upper bridge arm 1 and the The A-phase lower bridge arm 4 is connected in series, the end of the A-phase upper bridge arm 1 away from the A-phase lower bridge arm 4 is connected to the positive pole of the DC bus, and the A-phase lower bridge arm 4 is far away from the A-phase upper bridge arm 1 end. Connect the negative pole of the DC bus bar, the intersection of the upper bridge arm 1 of the A phase and the lower bridge arm 4 of the A phase leads to the a phase of the three-phase power supply, and the phase B bridge arm is compose...
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