Research On Harmonic Emission Characteristics Of LED Lamps

LED lamps have high efficiency,low power consumption and energy saving characteristics compared to traditional lamps and other widely used energy-saving lamps.Therefore,both their research,development and promotion have been paid close attention and supported by the government both at home and abroad.However,when the LED lamps have been widely used,the amount of harmonics brought into the lighting system by them can not be ignored,therefore,it is necessary to study the harmonic emission characteristics of LED lamps.The research on the harmonic emission characteristics of LED lamps is instructive to the harmonic suppression of LED lamps,the improvement of the drive circuit structure,the power quality evaluation standards and the improvement of the system.The main work is as follows:1.The harmonic analysis algorithm of LED lamps is researched,and some improvements are put forward in the two aspects of spectral interpolation and window function.2.Study the causes of harmonic generation,according to the working principle of LED lamp driver circuit.The simulation model is established to study the harmonic emission characteristics of the LED light drive circuit.And influence of the harmonic emission characteristics on change of the power supply parameters.3.Under the guidance of simulation results,the experimental platform is built to study the harmonic emission characteristics and power quality of LED lamps under standard power supply.The influence of the change of power supply parameters on the harmonic emission characteristics of LED lamps is further studied.4.The principal component analysis method is introduced to realize the comprehensive evaluation of LED lamps.And the effectiveness of the evaluation is proved.