LED lighting harmonic immunity test case

LED has the advantages of good light quality, low energy consumption, long life, small size, etc., and is gradually replacing traditional fluorescent lamps and fluorescent lamps, and is widely used in various fields. In practical applications, power grid harmonics have a non-negligible impact on the work of LED lamps.

For example, a new factory installs a batch of LED lamps. During the debugging stage, it is found that the LED lamps flicker, which seriously affects the lighting quality. The on-site power quality analysis of the power grid shows that the 3/5/11th harmonic content is high, up to 3%. It is not yet determined that the high content of power grid harmonics is the direct cause of the instability of LED lighting.

LED manufacturers use PWR2000W high-performance programmable AC power supplies to synthesize harmonics, simulating harmonic AC power in new factories. The 3/5/11th harmonic content is adjusted by a high-performance programmable AC power supply to verify the influence of harmonics on the light quality of LED lamps. The test shows that the 3/5/11th harmonic content is less than 0.5%, and the LED lighting is normal, that is, the high harmonics cause the LED lighting to be unstable. With reference to the voltage harmonic requirements of the European standard EN50160: 2010 version of "Voltage Characteristics of Public Power Supply Systems" (as shown in Figure 1), more stringent grid harmonic immunity verification is carried out for LED lamps.

ZLG Zhiyuan high-performance programmable AC power supply can not only output AC, DC and AC-DC, but also integrate voltage fluctuation and harmonic synthesis functions to accurately simulate various normal or abnormal power supply conditions, test and verify consumer electronics, information and communication technology, new The performance and function of electronic products in energy and other fields.