US 12,218,607 B2
Method for controlling a power converter, and power converter system having such a power converter
Rodrigo Alonso Alvarez Valenzuela, Nuremberg (DE); Andreas Lorenz, Erlangen (DE); and Dominik Schuster, Diespeck (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 17/416,615
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Dec. 19, 2018, PCT No. PCT/EP2018/085832
§ 371(c)(1), (2) Date Jun. 21, 2021,
PCT Pub. No. WO2020/125968, PCT Pub. Date Jun. 25, 2020.
Prior Publication US 2022/0077766 A1, Mar. 10, 2022
Int. Cl. H02M 7/483 (2007.01); H02M 1/32 (2007.01)
CPC H02M 7/483 (2013.01) [H02M 1/327 (2021.05); H02M 7/4835 (2021.05)] 10 Claims
OG exemplary drawing
 
1. A method for controlling a power converter, in which a setpoint of a control parameter is limited by at least one limiting value, which comprises the step of:
determining, at predetermined time intervals, several limiting values for several control parameters, with each limiting value for a respective control parameter being determined as a function of a power converter temperature;
selecting at least one limiting value of said several limiting values in a prioritized manner according to requirements placed on the power converter or on an energy transmission;
limiting the setpoint of the control parameter of the power converter based on the at least one limiting value selected;
selecting the control parameter from the group consisting of a reactive current on an AC-voltage side of the power converter, an actual current on the AC-voltage side of the power converter, a current on a DC-voltage side of the power converter, a power converter-internal circulating current, a voltage on the DC-voltage side of the power convert, a voltage on the AC voltage side of the power converter, a frequency on the AC-voltage side of the power converter, a total energy at the power converter, and any linear combination of control parameters; and
controlling the power converter to limit at least one of an active power or a reactive power of the power converter based on the setpoint of the control parameter limited by the at least one limiting value.