Date of Award

August 2014

Degree Type

Thesis

Degree Name

Master of Science

Department

Engineering

First Advisor

Adel Nasiri

Committee Members

David Yu, Hossein Hosseini

Abstract

Data Center Power Distribution design is very popular today focusing on improved energy efficiency and reduced operating cost. Conventionally data centers use low efficiency electrical power distribution systems with large AC power transformers, high power losses, and AC UPS and PDU power conversions. Most IT servers utilize low voltage level (12V or 48V) as the power source, which requires a step-down transformer and AC to DC rectifiers in every PDU. The "Proposed 380V DC Power Distribution System" promises to deliver high transmission efficiency and low power component cost.

This is a comprehensive design including data center physical architecture and equipment selection, centralized rectifier design, simulation and analysis, power loss analysis, and power requirement and system efficiency calculations.

The core technical contribution is the design and simulation of a Buck-type current source rectifier using efficiency modeling analysis. This special converter is applied to data center power system to replace large scale AC transformers and distributed rectifiers. Related power and efficiency calculations aim to verify the viability, applicability, and practicality of this system design and to minimize power losses.

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