Energy supply network, method and aircraft or spacecraft

The present invention provides an energy supply network, especially for an aircraft or spacecraft, comprising a first coupling device (2), the first coupling device (2) being configured to couple the energy supply network to an external energy source (9), a first high voltage direct current, HVDC, segment, the first HVDC segment (3) being coupled to the first coupling device (2) and a second HVDC segment (4), the second HVDC segment (4) being coupled to the first coupling device (2). The present invention furthermore provides a corresponding method and an aircraft or spacecraft.