INVERTER FOR A POWER GENERATION SYSTEM AND METHOD FOR OPERATING SUCH AN INVERTER

• Main Authors: PREINING, Pascal, CHALUPAR, Daniel, GRASBÖCK, Richard
• Format: Patent
• Language: English; French; German
• Published: 02.12.2020
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSMISSION

The invention relates to an inverter (200) for a power generation system (1000) comprising a DC-input (205), an AC-output (203) with an output filter (204) with a filter capacitor (CFilter) for transmission of an inverter current (I_Inverter) and for connection with a grid (300) of a grid impedance (ZGrid), wherein a ripple control transmitter (400) for transmitting a ripple control signal (I_Ripple) is in connection with the grid (300), and further comprising a controller (201) adapted to control a transmitter (201c) for a regulation of the inverter current (I_Inverer), and a method for operating such an inverter (200). According to the invention, the controller (201) comprises a detector (201) for determining the actual current (iCapRipple) of the ripple control signal (I_Ripple) across the filter capacitor (CFilter) and a regulator (201b) for regulating the inverter current (I_Inverter) based on the determined actual current (iCapRipple) of the ripple control signal (I_Ripple) and the grid impedance (ZGrid), and that the transmitter (201c) is adapted for transmitting the regulated inverter current (I_Inverter") via the AC-output (203) to the grid (300).