Voltage setting device

A voltage setting device, comprising:

• a multi-step voltage output;
• a power converter unit having a first power section and a second power section, said first and second power sections forming a power converter branch;
• said second power section having a group of modules each including at least one energy storage device, a switch group, and a module output;
• and
• a control unit configured for controlling said first power section for providing a branch voltage in accordance with a first voltage step structure and, in at least one control mode, for controlling said group of modules for providing the branch voltage in interaction with said first power section in accordance with a second voltage step structure, wherein the second voltage step structure is finer than the first voltage step structure.

A method of providing an electrical voltage, comprising:

• providing a voltage setting device at least one multi-step voltage output;
• controlling a first power section, which forms at least a section of a power converter branch of the voltage setting device for providing a branch voltage in accordance with a first voltage step structure;
• controlling at least one second power section which, together with the first power section, forms the power converter branch and contains a group of modules each having at least one energy storage device, a switch group, and a module output;
• controlling at least the group of modules for providing the branch voltage in interaction with the first power section in accordance with a second voltage step structure that is finer than the first voltage step structure.