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Abstract
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| The term flicker is used to refer to the subjective impression that is experienced by human beings when subjected to changes occurring in the illumination intensity of light sources. One of the reasons for the complexity in the evaluation of this phenomenon is the human factor involved in its definition, since it forces one to take into account the characteristics of the physiological process of perception. From an electrical point of view, flicker is caused by voltage fluctuations with an amplitude which is generally much lower than the threshold of immunity for elec- trical equipment. So, it can be said that the major effect of rapid voltage fluctuations is flicker. Voltage variations on the order of only a few tenths of a percent can produce a very significant malaise, especially if the frequency of repetitive deviations is between 8 and 10 Hz. Fluctuating loads such as arc furnaces, welders, etc., whose power demand experiences wide and rapid variations, can be potential sources of voltage fluctuations producing flicker. Different mitigation methods oriented to decrease voltage variations caused by these type of loads can be applied in order to reduce flicker levels. | |
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International
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No |
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Book Edition
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0 |
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Book Publishing
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ISBN
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978-0-470-06561-7 |
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Series
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Book title
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Handbook of Power Quality |
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From page
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135 |
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To page
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162 |