Supply line, supply system and method for operating an electric drive

An electrical supply system comprising:

• a first electrical supply line for operating a first electric motor with a first converter for supplying electric energy to the first electric motor depending on a first control variable and a connected network connecting the first converter to a DC voltage source;
• a second electrical supply line for operating a second electric motor with a second converter for supplying electric energy to the second electric motor depending on a second control variable and a connected network connecting the second converter to a DC voltage source;
• a shared oscillation suppression controller for generating first and second correction information,
• a first correction module for generating the first control variable based on a first operating parameter of the first electric motor and on the first correction information, and
• a second correction module for generating the second control variable based on a second operating parameter of the second electric motor and on the second correction information.

A method for operating an electric drive, comprising:

• Supplying electric energy from a DC voltage source to a first converter via a connected network;
• Generating first correction information by taking into consideration a voltage applied to the first converter via a connected network or by taking into consideration a current supplied to the first converter via the connected network, or both;
• Generating a control variable by taking into consideration an operating parameter of a first electric motor and by taking into consideration the first correction information;
• and
• Supplying electric energy from the first converter to an electric motor connected to the first converter in dependence of the control variable.