Strategy for introduction of high-voltage DC power supply system at NTT group

Okuno, Takashi; Okamura, Shintaro; Ooi, Yasuyuki; Hirose, Keikichi; Nishii, R.

doi:10.1109/intlec.2015.7572452

Cited by 2 publications

(1 citation statement)

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“…Nippon telegraph and telephone (NTT) is a Japanese telecommunications company headquartered in Tokyo that has carried out substantial research on the distribution of high voltage DC power to telecommunications and data center applications. NTT published an article in 2015 [68] on the implementation of a 100-kW system with a maximum rated voltage of 400 VDC as a distributed voltage to meet the basic requirements of ITU-T L.1201 [69] international standards.…”

Section: Nippon Telegraph Telephone Facilitymentioning

confidence: 99%

A comprehensive review of distributed power system architecture for telecom and datacenter applications

Darla

Chitra

2021

IJPEDS

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With the dominating utility of the internet, it becomes critical to manage the efficiency and reliability of telecom and datacenter, as the power consumption of the involved equipment also increases. Much power being wasted through the power conversion stages by converting AC voltage to DC voltage and then stepping down to lower voltages to connect to information and communication technology (ICT) equipment. 48/12 VDC is the standard DC bus architecture to serve the end utility equipment. This voltage level is further processed to multiple lower voltages to power up the internal auxiliary circuits. Power losses are involved when it is converted from higher voltage to lower voltages. Therefore, the efficiency of power conversion is lower. There is a need to increase the efficiency by minimizing the power losses which occur due to the conversion stages. Different methods are available to increase the efficiency of a system by optimizing the converter topologies, semiconductor materials and control methods. There is another possibility of increasing the efficiency by changing the architecture of a system by increasing the DC bus voltage to higher voltages to optimize the losses. This paper presents a review of available high voltage options for telecom power distribution and developments, implementations and challenges across the world.

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Section: Nippon Telegraph Telephone Facilitymentioning

confidence: 99%