Study of voltage sag impact on LED lamp consumed currents

The use of light emitting diode (LED) lamps in utility distribution systems is spreading because of the implementation of energy saving policies. These devices may malfunction and consume current peaks due to voltage sags, which are one of the most serious problems for sensitive equipment. This paper investigates the impact of voltage sags on currents consumed by LED lamps, and proposes an equivalent circuit of LED lamps. Simulations with this circuit and experimental measurements are discussed and compared.