摘要:
The system (40) for dynamically determining maximum electric current carrying capacities comprises: means (44) for storing a model (54) of a network portion (10), a thermal equilibrium relationship (56), operating limit temperatures and conduction parameters; and a receiver (46) for wind speed values measured by wind measurement stations (24, 26, 28, 30). The system further comprises a computer (48) programmed (62, 64, 66, 68) to: apply a model (60) of wind propagation from at least one selected station towards singular points of the model (54) of the network portion, in order to estimate a wind speed value at each singular point; and calculate at least one maximum capacity value at each singular point on the basis of the thermal equilibrium relationship (56), of each operating limit temperature, of each conduction parameter and of weather parameters (58), taking into account said wind speed value estimated at each singular point in the thermal equilibrium relationship (56).
摘要:
This electric current transmission cable comprises a non-anodized bare conductor (10) based on aluminium or aluminium alloy exhibiting a hydrophilic external specific surface area (S) intended to be in contact with the atmospheric medium and an interior volume (V) intended to conduct an electric current. The external specific surface area (S) of the bare conductor (10) exhibits a first roughness parameter (R), defined as arithmetic mean deviation measureable by profilometry of peaks and troughs with respect to a predetermined mean profile over a reference length or surface, greater than or equal to 1.9 µm. Furthermore, the interior volume (V) of the bare conductor (10) exhibits, down to a depth (P) of at least 300 nm with respect to the external specific surface (S), an oxygen doping of its aluminium-based or aluminium-alloy-based components according to an amount greater than or equal to 20%.