TENOR: power supply with a single AC/DC conversion stage and distributed energy storage adapted for telecommunication and computing systems

This paper presents the evolution of the energy power supply of telecommunication systems. The exchange and transmission equipment, centralized or distributed, need less and less power. The power is essentially used under electronic voltage (80 % under 5 V and 3 V for new technologies and some 12 V). Only 20 % of the power is delivered under 54 V for the remote power supply of the subscriber line. This voltage is no longer useful for the GSM radio network and FTTC optical network. Until now, the standardized voltage interface 48 V or 60 V remains the reference for telecommunication equipment. This voltage is supplied by decentralized DC cabinets having 1 hour autonomy, installed near the system or even integrated in the system itself. These cabinets are powered by the high availability GEODE AC source under 3 phase AC 400 V voltage of the public mains. Associated computers for complementary services, are powered by UPS providing an autonomy of 10 to 15 min. The standardized interface with the equipment is in this case the single phase public AC mains 230 V voltage. So, in the same centers, two uninterrupted power sources, DC 48 V and AC 230 V, run together with two standardized voltage interfaces, DC and AC. The TENOR project´s aim is the unification of these two power supply methods with a single AC interface applicable to any size of installation. This result can be achieved through the new concept of distributed energy storage