Power supply network connected to a transport system

The network has a connection point (PCO) for connecting the network to an upstream electrical network (REA). A first electrical network (RE1) comprises a power output (SP) for distributing energy recovered from a transportation system (ST) and the upstream electrical network. A second electrical network (RE2) supplies power to power consumption points (Sc1-Sc3) e.g. travelator and escalator. A supervising unit (UC) monitors energy distribution of the power output when the peak power required by the transportation system is lower than operating power (Pf) that is available upstream.