Design and implementation of industrial uninterruptible power supply

Abstract

Providing a steady flow of power is important for mission-critical electrical loads. Slight variations in the voltage may cause these loads to fail in a way that back-up generators cannot quickly respond to. Uninterruptible power supply (UPS) systems provide a nearly instantaneous solution to these power quality problems. Designing and implementing a UPS system was the main objective of this project. Many modern UPS systems are power electronics systems composed of an online double-conversion rectifier-inverter, a battery management system, and a set of bypass systems. For this project, a Vienna rectifier and three level inverter double-conversion topology was selected for its simplicity and high efficiency. The design topology was implemented using Matlab/Simulink software in order to demonstrate a proof of concept for the UPS system. As an extension of this project, additional work was done in an attempt to physically realize the system. Prototype hardware and software were developed and tested.