Power converter arrangement and method for its regulation using voltage setpoint values by use of a pre-modulator

A method for regulation of a power converter configuration having at least one power converter arm with a series circuit of two-pole switching modules, wherein each of the two-pole switching modules having a plurality of semiconductor switches and an energy store, wherein at least some of the two-pole switching modules are switching modules of a first type and at least some further ones of the two-pole switching modules are switching modules of a second type, which comprises the steps of:

• apportioning a voltage setpoint value of a power converter regulator into a first setpoint value portion and a second setpoint value portion;
• apportioning the voltage setpoint value by means of a pre-modulator;
• carrying out an energy regulation by means of an energy regulator, wherein an energy specification for a total energy of the switching modules of the first type that is to be set is provided at an output of the energy regulator;
• transmitting the energy specification to the pre-modulator;
• apportioning the voltage setpoint value in dependence on the energy specification;
• transmitting the first setpoint value portion to a first control module for generating control signals for control of the switching modules of the first type on a basis of the first setpoint value portion;
• transmitting the second setpoint value portion to a second control module for generating control signals for control of the switching modules of the second type on a basis of the second setpoint value portion;
• driving the switching modules of the first type on a basis of the first setpoint value portion;
• and
• driving the switching modules of the second type on a basis of the second setpoint value portion.

A power converter configuration, comprising:

• at least one power converter arm having a series circuit of two-pole switching modules, wherein each of said two-pole switching modules having a plurality of semiconductor switches and an energy store, at least some of said two-pole switching modules are switching modules of a first type and at least some further one of said two-pole switching modules are switching modules of a second type;
• a regulator apparatus for regulation of the power converter configuration and having a pre-modulator, a first control module and a second control module, said regulator apparatus configured to:
• apportion a voltage setpoint value of said regulator apparatus into a first setpoint value portion and a second setpoint value portion by means of said pre-modulator;
• transmit the first setpoint value portion to said first control module for generating control signals for control of said switching modules of said first type on a basis of the first setpoint value portion;
• transmit the second setpoint value portion to said second control module for generating control signals for control of said switching modules of said second type on a basis of the second setpoint value portion;
• drive said switching modules of the first type on a basis of the first setpoint value portion;
• drive said switching modules of the second type on a basis of the second setpoint value portion;
• and
• determine, by means of said pre-modulator, a load flow direction of a power converter load flow from an arm current of the power converter configuration and a direct current on a direct-voltage side.