Abstract
This study aims at the investigation of street-lighting feeders and the technical issues which are caused by the substitution of the traditional lamps with the light-emitting diode (LED) ones. Three types of lamps are investigated: fluorescent, high-pressure discharge and LED lamps. Load static behaviour and the total harmonic distortion are examined experimentally, while lighting feeder behaviour is investigated numerically. Experimental results show that the total harmonic distortion and power factor of LED lamps are significantly higher than that of traditional lamps. Numerical investigations have shown that the total lighting feeder behaviour is independent from the lamp types.