Control method for direct-current transmission
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
Abstract
In a method for controlling a rectifier and an inverter, which are connected together by a direct current circuit, a measuring direct current voltage and respectively, a measuring direct current are measured at at least one measuring point of the direct current circuit and are transmitted to a direct current control for controlling the rectifier and/or an inverter control for controlling the inverter. The direct current control controls the rectifier in such a manner that a total of a difference direct current voltage and a differential direct current is minimal and the inverter control of the inverter is controlled in such a manner that the difference between the differential direct current of the differential direct current voltage is minimal. The method is reliable and is economical. Accordingly, the desired flow of the direct current control and the desired flow of the inverter control are identical.
-
Citations
11 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification