Abstract
With the constant increase of energy consumption in the world, the efficiency of systems and equipment is becoming more important. Uninterruptible Power Supply (UPS) is an equipment that provides safe and reliable supply for critical load systems, that is, systems where a supply interruption can lead to economical or even human losses. The Double Conversion UPS is the most complete UPS class in terms of load protection, regulation, performance, and reliability, however, it has lower efficiency and higher cost because of its high number of power converters. Silicon Carbide devices are emerging as an opportunity to construct power converters with higher efficiency and higher power density. The main purpose of this work is to design a three-phase AC-DC-AC converter using Silicon Carbide for Double Conversion UPS applications. The aim is to maximize efficiency and minimize volume and mass. The methodologies to size and choose the main hardware components are described in detail. Experimental results obtained with the prototype prove the high efficiency and high power density achievable with Silicon Carbide Metal Oxide Semiconductor Field Effect Transistor (MOSFETs).
Highlights
Final energy consumption in the form of electricity accounts for a large share of the world’s energy consumption, and may reach more than 50% in some countries [1]
Rational use of electricity and energy efficiency of the generation-storage-distribution-consumption cycle become very important for engineers and researchers that aim the sustainable development
Among the various types of loads present in the electrical system, we can highlight the critical loads, that is, loads that cannot have the supply of electricity interrupted regardless of the environmental conditions and failures in the electrical system
Summary
Final energy consumption in the form of electricity accounts for a large share of the world’s energy consumption, and may reach more than 50% in some countries [1]. The consumption of electric energy presents accelerated growth, for example, it has increased about 56% in Brazil and 455% in China between 2000 and 2014 [1]. Against this scenario, rational use of electricity and energy efficiency of the generation-storage-distribution-consumption cycle become very important for engineers and researchers that aim the sustainable development. Examples of critical loads are: Telecommunications and information technology systems, hospital equipment, and banking systems. In order to supply such loads, Uninterruptible Power Supplies (UPS) are often used
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