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Study on Fluorescent Lamp Flicker with Self-Oscillating Electronic Ballast under Voltage Containing Interharmonic

Author: ZhouHaiBing
Tutor: YongJing
School: Chongqing University
Course: Electrical Engineering
Keywords: Inter-harmonics Self-oscillating electronic ballast Power fluctuations Flicker Flicker limit curve
CLC: TM923.61
Type: Master's thesis
Year: 2009
Downloads: 41
Quote: 0
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Abstract


With the rapid development of power electronics technology, especially the wide application of frequency control devices in the power system and a variety of non-linear load increasing number of more and more inter-harmonics injected into the grid. Inter-harmonic any non-integer multiples of the fundamental frequency voltage or current signal. The major negative effects of inter-harmonics cause voltage fluctuations and flicker, which causes the light source Guang Shan change, affect people's visual comfort and efficiency. The large number of facts and experiments showed that fluorescent lamps have a very significant the role of inter-harmonic voltage flicker effect, and even higher frequency of inter-harmonics can lead to the human eye can perceive Guang Shan change. This caused great concern in the domestic and foreign scholars, and actively work to obtain a certain amount of research. But so far, there is no generally accepted standards and evaluation methods based on fluorescent flicker between the harmonic limit, Research fluorescent flicker effect in the role of inter-harmonic voltage for further study of harmonic suppression measures and inter-harmonics compatible with standard has important theoretical significance and practical value. Papers according to the working principle of the self-oscillating electronic ballast, fluorescent high frequency state equivalent circuit of the electronic ballast fluorescent mathematical models and theoretical analysis; switching function method based on the modulation theory, deduced fluorescent lamps contain between harmonic components of the power supply voltage power response, established a line of fluorescent instantaneous power waveform envelope fluctuations in depth and fluctuation frequency harmonic amplitude and frequency of the relationship between the curve in between the harmonic voltage under fluorescent power fluctuation characteristics. Created mathematical model of self-oscillating electronic ballast fluorescent structures through the use of mathematical software Matlab / Simulink tools in the power system simulation module simulation circuit for fluorescent lamps in the role of inter-harmonic voltage power fluctuations of the simulation, the the result is basically consistent with the theoretical analysis. In addition, the paper also qualitatively by physical experiments on the role of inter-harmonic voltage self-oscillating electronic ballast fluorescent lamp voltage fluctuations verified, thus proving the mathematical model based on the self-oscillating electronic ballast fluorescent theory the rationality of the analysis. Fluorescent instantaneous power waveform and its luminous flux waveform analysis, and combined with the existing research, the relationship between the the fluorescent luminous flux fluctuations and power fluctuations; and will obtained by IEC flickermeter. Based incandescent meet the instantaneous flicker visual sensitivity S (t) = 1 the critical flux fluctuation curve extended to fluorescent lamps, based on the theoretical analysis of the mathematical model created by the self-oscillating electronic ballast fluorescent, contains a single supply voltage and a pair of harmonic components The fluorescent flicker limit curve.

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CLC: > Industrial Technology > Electrotechnical > Electrification,electrical energy application > Electrical lighting > Attachment > Ballast
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