Sma Solar Technology Ag

Karel De Brabandere

Sven Bremicker

Daniel Premm

Tobias Mueller

Vitali Sakschewski

Stijn Stevens

Yehia Tarek Fawzy

Tobias Müller

Lars Cramer

A method for the operational control of an inverter designed for DC/AC voltage conversion that has at least one direct-voltage input and that can be connected to a power supply grid via at least one alternating-voltage output, the inverter being involved in a power flow interaction with the grid in such a manner that, during operation of the inverter, a leakage current Ican occur, wherein the leakage current Iis controlled in the operational control.

Method for the operational control of an inverter

A method for grid support by means of an inverter is disclosed, wherein the grid is supported by feeding in compensation currents. The method includes measuring a prevailing grid state, and breaking down voltages measured for measuring the prevailing grid state into symmetrical components of the grid state including positive sequence system components and negative sequence system components. The method further includes determining symmetrical components of a compensation current including positive sequence system components and negative sequence system components of the compensation current as functions of deviations of the positive sequence system components and negative sequence system components of the grid state from reference values, and feeding-in a compensation current as the vector sum of the determined symmetrical components of the compensation current.

Method for stabilizing an electric grid

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Kassel, Germany

Karel De Brabandere