Patent ID: 7729138

Claim:
A method for controlling a rectifier and an inverter being connected to one another via a DC circuit, in a field of power distribution and transmission, which comprises the steps of: measuring a measured DC voltage and a measured direct current at least one measurement point in the DC circuit; forwarding the measured DC voltage and the measured direct current to at least one of a rectifier control system for controlling the rectifier and an inverter control system for controlling the inverter; the rectifier control system and the inverter control system each determining a difference between a predetermined nominal DC voltage and the measured DC voltage received, resulting in a difference DC voltage and, furthermore, determining a difference between a nominal direct current and the measured direct current received resulting in a difference direct current, with the difference DC voltage and the difference direct current being in a normalized form; controlling, via the rectifier control system, the rectifier such that a sum of the difference DC voltage and the difference direct current is minimized; controlling, via the inverter control system, the inverter such that the difference between the difference direct current and the difference DC voltage is minimized; and setting the nominal direct current through the rectifier control system and the nominal direct current through the inverter control system to be identical.