Analysis of voltage sag sensitivity of LED lamps

Voltage sag is one of the serious power quality problems especially for sensitive equipment. Electronic devices such as personal computers, lighting system may malfunction due to voltage sag events and may cause nuisance and financial losses in some cases. The purpose of this paper is to investigate the sensitivity of various low wattage LED lamps during voltage sag. The test is based on current testing standard and utilizes modern industrial power corruptor and advanced photo detector. Results show that all the tested lamps are sensitive to voltage sags in terms of both depth and duration of sag.