The HVDC power supply system implementation in NTT group and next generation power supply system

Tanaka, Toru; Matsumori, Hiroaki; Hanaoka, Naoki; Murai, Kensuke; Takahashi, Atsushi; Yajima, Hiroya; Babasaki, Tadatoshi

doi:10.1109/intlec.2014.6972160

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…The key specifications of the system are − The operating voltage of the high voltage DC bus is in the range of 260 V to 400 V DC with a rated voltage of 380 VDC [70]. It is necessary to define the rated voltage of ICT equipment in order to meet this level.…”

Section: Nippon Telegraph Telephone Facilitymentioning

confidence: 99%

“…Intel has conducted a case study [71] to understand the cost and operational benefits in 400 VDC over traditional AC distribution for a 5.5 MW data center. Intel study has a conclusion of energy savings of 7 to 8 percent with a 15 percent capital cost savings and 33 percent space savings at the facility and the reliability improvement of 200 percent.…”

Section: Intelmentioning

confidence: 99%

“…The high voltage DC product range is from 1RU storage systems to 2RU, 3RU, 4RU, Blades, and mainframe. Table 2 shows the line up of high voltage DC ICT equipment from the different organizations [70], and this high voltage DC ICT equipment is expected to be widespread in the future.…”

Section: Intelmentioning

confidence: 99%

“…High voltage DC ICT products line[71] Figure26. DC powered voltages and sites ICT across the globe[73] …”

mentioning

confidence: 99%

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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%

Section: Intelmentioning

confidence: 99%

Section: Intelmentioning

confidence: 99%

“…High voltage DC ICT products line[71] Figure26. DC powered voltages and sites ICT across the globe[73] …”

mentioning

confidence: 99%

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

Darla

Chitra

2021

IJPEDS

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“…() Power source related technology for raising the level of self-sufficiency and supplying power to network equipment (2) Air-conditioning related technology for raising the energy efficiency of air conditioning systems for telecom buildings (3) Technology for integrated operation of network equipment, power supply systems, and air-conditioning systems (4) Technology for reducing power consumption, with network architecture and network equipment designed to contribute to overall network energy efficiency (5) Green telecom infrastructure technology for resource conservation (6) Technology for dealing with electromagnetic radiation, lightning, and other disturbances from the external environment. These Feature Articles introduce R&D work on materials for energy production and storage [] and high-voltage direct current (HVDC) power supplies [2,3], which concern the first three items above. Other articles feature work on reducing power use of network equipment [4] and of optical access systems [5] (item 4), and work on conserving resources for the materials used in the telecom infrastructure [6] (item 5).…”

Section: Six Areas Of Technology Related To Environment and Energymentioning

confidence: 99%

R&D Efforts to Reduce the Burden of ICT Services on the Environment

Watanabe,

Akiyama,

Sugiyama

2015

NTT Technical Review

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Providing telecommunications services requires a telecom infrastructure that comprises network equipment, air-conditioning systems, power supply equipment, access system equipment, and various other facilities. As a telecom provider, NTT manages the full range of such facilities. This article describes research and development efforts to reduce the burden placed on the natural environment by ICT (information and communication technology) services, focusing on what is being done by the NTT research laboratories and NTT Group companies as members of the Green and Sustainable Infrastructure Committee.

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