Voltage fluctuation and harmonic emission related to light emitting diode lamps

Abstract

The energy management issue has become crucial at this moment as the power demand has increased rapidly as time goes on. Therefore, a proper usage of energy is more concerned and the energy efficient lighting system had introduced and being widely used to reduce the power demand. However, at the same time, the Power Quality issues have been raised. Lighting system considering as one of the biggest energy consumption from the overall energy consumption of the system especially for commercial building. Most of the energy efficient lighting system are consider as the non-linear load will be creating disturbances to the power system. The relation of active power, price of LED lamps and harmonic current emission will be investigate in this project and at the end of the project, the characteristics of LED lamps with lowest contribution of power quality issue will be proposed. In this project, the focus will be on waveform distortion and voltage fluctuation only. From various type of Light Emitting Diode (LED) lamps available in the market, the LED lamps with active power less than 25W will be studied as there is no dedicated standard requirement for energy efficient lighting system with active power less than 25W. An individual lighting and a group of lighting will be observed on their behavior and the effect of Power Quality issues on voltage fluctuation and harmonic current emission. The measurement of waveform distortion from a LED lamp will be evaluated as specified in MS IEC 61000-3-2. Methodology and test condition specified in MS IEC 61000- 3-2 and MS IEC 61000-4-14 will be adopted for measurement of waveform distortion and inject voltage fluctuation waveform in this project. The results show that there is no relation between active power, price of LED lamps and harmonic current emission. The LED lamps with active power of 18W and colour temperature of 6400K have the lowest contribution in power quality issues.