This paper presents the variation in current harmonics injected by the LED lamps and their effect on harmonic estimation in the low-voltage network. Lighting consumes a significant portion of total electricity consumption in residential, commercial and industrial sectors. The energy-efficient lights, for example, light-emitting diode lamps, are reducing this share significantly over the last few years. These nonlinear LED lamps are the source of current harmonics and reduce the power quality in the low-voltage grid. The estimation of the magnitude by which they affect the power quality is essential for network operators. However, the thermal stability of the lamps is a prime consideration for the accurate assessment of the power quality. This paper investigates the effect of thermal stability on current harmonics injected by LED lamps.

本文介绍了LED灯注入的电流谐波的变化及其对低压电网谐波估算的影响。照明消耗了住宅，商业和工业部门总用电量的很大一部分。在过去几年中，节能灯（例如发光二极管灯）正在大幅度减少这一份额。这些非线性LED灯是电流谐波的来源，并降低了低压电网的电能质量。对于网络运营商来说，估计它们对电能质量的影响程度至关重要。但是，灯的热稳定性是准确评估电能质量的主要考虑因素。本文研究了热稳定性对LED灯注入的电流谐波的影响。