Hybrid vehicle

Method for operating hybrid energy system in a vehicle comprising:

• an autonomous power supply and being connectable to an external power supply infrastructure along the route of the vehicle;
• a first high voltage circuit comprising a first traction motor for propelling the vehicle connected to an energy storage system by a first power converter;
• a second high voltage circuit comprising a second traction motor for propelling the vehicle connectable to an external power supply by a second power converter;
• and where the first high voltage circuit and the second high voltage circuit are connectable by a third power converter and by a parallel controllable switch between the first and the second power converters, the method comprising
• operating the hybrid energy system in alternative modes, comprising at least:
• an autonomous power supply mode involves operating the first traction motor using the energy storage system;
• an external power supply mode involves connecting the third power converter and operating one or both of the first and second traction motors using the external power supply;
• and
• a combined autonomous and external power supply mode involves operating the first traction motor using the energy storage system and the second traction motor using the external power supply.