METHOD FOR PRODUCING AN OUTPUT VOLTAGE AND ASSEMBLY FOR PERFORMING THE METHOD
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Abstract
In a method for generating with a modular multilevel power converter (M2C) having a plurality of sub-modules a frequency-variable output voltage, the sub-modules are switched on and off to generate from an input voltage discrete voltage steps approximating an approximately sinusoidal alternating output voltage having a first angular frequency located between a zero frequency and a second angular frequency, and the input voltage is controlled or regulated as a function of the first angular frequency so as to be located between a lower angular frequency, which is equal to or greater than the zero frequency, and a third angular frequency, such that the input voltage increases with increasing first angular frequency, thereby reducing capacitor complexity in the power converter.
16 Citations
30 Claims
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1-15. -15. (canceled)
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16. A method for generating with a modular multilevel power converter (M2C) having a plurality of sub-modules a frequency-variable output voltage, comprising:
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switching the sub-modules on and off to generate from an input voltage discrete voltage steps approximating an approximately sinusoidal alternating output voltage having a first angular frequency located between a zero frequency and a second angular frequency, and controlling or regulating the input voltage as a function of the first angular frequency so as to be located between a lower angular frequency, which is equal to or greater than the zero frequency, and a third angular frequency, such that the input voltage increases with increasing first angular frequency, thereby reducing capacitor complexity in the power converter. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An assembly for generating from a DC input voltage a frequency-variable output voltage approximating an approximately sinusoidal alternating output voltage having a first angular frequency located between a zero frequency and a second angular frequency, comprising:
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a modular multilevel power converter (M2C) comprising a DC input side and a plurality of sub-modules connected in series and each forming a branch, with each branch generating a corresponding output voltage having the first angular frequency, and a device producing a variable DC output voltage and being connected to the DC input side of the power converter, wherein the variable DC output voltage is varied commensurate with the first angular frequency, thereby reducing capacitor complexity in the power converter. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification