Study of harmonic generated by electromagnetic and electronic ballast used in street lighting

In this paper, several high power lighting networks based on high pressures sodium (HPS) lamps have been set up. These have been chosen because of they are used in public lighting. Both electromagnetic and electronic ballast have been used with the mentioned lamps. They have also been tested with different levels of power using dimming for a 220 V power supply in the case of electronic ballast which can dim the lamp output smoothly and uniformly. This paper focuses on the voltage and current harmonic characterization of modern HPS lamps connected to both electromagnetic and dimmable electronic ballasts. Harmonics under full and reduced power for several HPS lamps have been measured.