The catenary power supply system for the Pedralba de la Pradería – Orense high-speed section of ADIF’s Madrid-Galicia high-speed line is the 2×25 kV, 50 Hz system, which requires the construction of auto-transformer stations. The advantages of this system are, among others, the greater distance between substations, which can reach up to 70 km, and the reduction of electromagnetic disturbances. The electrical dimensioning has been carried out in accordance with the guidelines given by ADIF, which resulted in the line capacity study for the section, considered with the powers that have definitely been considered for the traction transformers and autotransformers. The 2×25 kV electrification system supplies power at 50 kV voltage between the contact line and the feeder, and the rolling stock draws power at 25 kV voltage between the contact line and the rail, which requires the installation of 55/27.5 kV ratio autotransformers every approximately 15 km. To house these autotransformers and their auxiliary equipment, two types of facilities were built near the tracks, depending on whether the autotransformers are installed near the neutral zones between substations, final autotransformer stations (ATF), or along the route, intermediate autotransformer stations (ATI). Each traction substation corresponds to an area, which includes the auto-transformer stations associated with the substation in the area, and which is defined as the catenary path that, in normal, non-degraded operating mode, is fed by that substation.
Client / Property: ADIF / ADIF
Award Date: 2019
Tender budget (VAT excluded): 12.121.342,86 €
Time of execution (bidding):
- 9 months (construction)
- 24 months (maintenance)
Scope:
The scope of the project begins at the center’s feeder exit gantries. This scope includes the definition of all electrical switchgear, both exterior and interior, and at all voltage levels, as well as all associated civil works (definition of the platform with its sanitation, drainage, oil collection and urbanization networks, access roads, technical building, foundations and metallic structure), auxiliary services (lighting and power, ventilation, air conditioning, fire protection, access control, video surveillance, distributed control system, etc.), ground networks and protection against atmospheric discharges, as well as pipelines for exterior connections to the railway platform, platform and improvement of the access road.), grounding networks and protection against atmospheric discharges, also including the conduits for the external connections to the railway platform, the platform and the improvement of the access road.
Key partners and collaborators:
This project was carried out in a joint venture with the company Eiffage.
