Will Grid Harmonics Affect the Lighting Quality of LED Lamps
If a batch of LED lamps are installed in a new factory, it is found that the LED lamps flash during commissioning, which seriously affects the lighting quality. The power quality analysis of the power grid on site shows that the content of 3rd / 5th / 11th harmonic is high, up to 3%. It is not determined that the high content of power grid harmonic is the direct cause of LED lighting instability.
LED manufacturers use pwr2000w high-performance programmable AC power supply to synthesize harmonics and simulate the harmonic AC of the new factory. The influence of harmonics on the lighting quality of LED lamps is verified by adjusting the 3rd / 5th / 11th harmonic content respectively through high-performance programmable AC power supply. The test shows that the content of 3rd / 5th / 11th harmonic is lower than 0.5%, and the illumination of LED lamps is normal, that is, the high harmonic leads to the instability of LED lamps. According to the voltage harmonic requirements of European standard en50160:2010 voltage characteristics of public power supply system (as shown in Figure 1), more strict grid harmonic immunity verification is carried out for LED lamps (as shown in Figure 2).
Figure 1 voltage harmonic requirements in en50160: 2010 voltage characteristics of public power supply system
Fig. 2 LED lamp grid harmonic immunity test
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 function to accurately simulate various normal or abnormal power supply conditions, test and verify the performance and function of electronic products in the fields of consumer electronics, information and communication technology, new energy and so on.
Typical application of high performance programmable AC power supply
1. Typical application functions
Voltage and frequency regulation output
Phase angle adjustment output
Harmonic synthesis output
Test output according to IEC standard
AC / DC hybrid output
List programming simulation output
Step programming simulation output
Line simulation output
2. Typical application fields
household electrical appliances
system integration
Information and communication technology (ICT)
Energy storage and photovoltaic inverter
Car wireless charging
Test certification test
Verification of electrical components
Electronic equipment R & D
Selection table of high performance programmable AC power supply
-Pro stands for professional version, * 1 only applies to professional version
