Method for operating a converter circuit, and apparatus for...

Details Method for operating a converter circuit, and apparatus for... Method for operating a converter circuit, and apparatus for...

2009-02-20

2011-10-25

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

Reexamination Certificate

active

08045347

ABSTRACT:
A method for operating a converter circuit is disclosed. Such a converter circuit has a converter unit with a multiplicity of actuatable power semiconductor switches and is connected to a three-phase electrical AC mains system and in which the actuatable power semiconductor switches are actuated by means of an actuation signal (SA) formed from a control signal (SR), and the control signal (SR) is formed by adjusting an H-th harmonic component of system currents (iNH) to a system current setpoint value (iNHref), wherein H=1, 2, 3 . . . . For the purpose of reducing a harmonic component in the system voltages, the system current setpoint value (iNHref) is formed by adjusting the absolute value of an H-th harmonic component of the system voltages (uNH) to the absolute value of a prescribable system voltage setpoint value (uNHref). An exemplary apparatus carries out the method.

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L.A. Serpa et al., “A Modified Direct Power Control Strategy Allowing the Connection of Three-Phase Inverter to the Grid through LCL Filters,” IEEE, 2005, pp. 565-571.

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