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A fundamental frequency-sorting algorithm with staircase modulation is proposed to balance the floating capacitors for modular multilevel converters. The driving pulses are assigned to the submodules at every fundamental period according to their charging capabilities for the capacitors. The charging capabilities of the driving pulses can be evaluated by sorting the voltage increments of the capacitors...
Modular multilevel converters (MMCs) become more and more attractive in high-voltage and high-power applications. The balance of the floating capacitor voltages is vital for MMCs. In order to balance the capacitor voltages, a fundamental frequency sorting strategy with Phase Disposition PWM is proposed in this paper. A dual sorting method, which sorts the capacitor voltage increments and the present...
Voltage faults and harmonics are some of the main problems in the modern electric power distribution system. Traditional solutions are proved to have several drawbacks. In this paper, a novel AC-AC series voltage compensator without large energy storage elements is proposed to deal with the above voltage problems in the power system, which only requires partial power conversion. In addition, only...
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