Case study of energy efficiency and electric power quality

Abstract

This paper describes the results of the electrical energy efficiency and power quality evaluation done in the School of Electrical and Computer Engineering of the University of Campinas (Unicamp) in São Paulo State, Brazil, through the Project named Ecogera. The analysis was based on the electrical signals acquired in the switchgear of the Students Classroom Building of the School of Electrical and Computer Engineering using measurement and energy management instruments. The replacement of the old lightning system using 40 W old fashion fluorescent bulbs mounted on non reflective fixtures by new energy save 32W fluorescent bulbs mounted on reflective fixtures reduced expressively the electrical energy consumption and the installation electrical power demand. The measurements allowed to know the details of harmonic distortions and disturbances that affect voltage magnitude and current.