Ship shore power supply system and three-phase unbalanced load control method thereof
A technology for shore power supply and ships, which is applied in flexible AC power transmission systems, multiphase network asymmetry reduction, multiphase network elimination/reduction asymmetry, etc. Voltage imbalance and other problems, to ensure stable operation, simple implementation, and small calculation amount
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] see Figure 1-2 The ship shore power supply system of the present invention includes a multi-winding phase-shifting transformer 1 in structure, and the voltage of the shore power grid is divided into 3N groups of winding voltages of different phases through the multi-winding phase-shifting transformer 1, and N is the number of power module units. The multi-winding phase-shifting transformer 1 is connected to a three-phase rectifier 7, and the rectifier 7 adopts a diode rectifier to rectify the winding voltages of 3N groups of different phases, and then use them as DC input signals for each group of H-bridge units 8 composed of power switching devices. After cascading, the voltage is output through the inverter, the filter 3 and the isolation transformer 4 in order to realize power supply to the load. The filter 3 adopts a three-phase LC filter, and a ...
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