Power electronic transformer system and control method thereof
A technology for power electronics and transformers, applied in the field of power electronic transformer systems and their control, can solve the problems of increasing the difficulty of system control and increasing the volume of the system, and achieve the advantages of reducing the difficulty of control, reducing capacitance, reducing volume and cost. Effect
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[0047] Examples:
[0048] Since the output voltage Uout of a single module contains 2 times frequency fluctuations, the output voltages of m modules in phase A contain 2 times frequency fluctuations after being connected in parallel, the output voltages of m modules in phase B are connected in parallel contain 2 times frequency fluctuations, and the output voltage of m modules in phase C The parallel connection contains 2 times frequency fluctuations, and the phase difference of the three-phase output voltage is 120°. The three-phase voltages of A, B and C are connected in parallel to offset the 2 times frequency fluctuations. The total output voltage fluctuation of the system is small, so the capacitance values of capacitors C1 and C2 small.
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