Flicker: Causes, Symptoms, and Cures - Human perception of light flicker is almost always the limiting criterion for controlling small voltage fluctuations

摘要

Voltage fluctuations in power systems can cause a number of harmful technical effects, resulting in disruption to production processes and substantial costs. But flicker, with its negative physiological results, can affect worker safety as well as productivity. Humans can be sensitive to light flicker caused by voltage fluctuations. Generally speaking, flicker can significantly impair our vision and cause general discomfort and fatigue. The physiology of this phenomenon is complex (see "Tracking Human Perceptibility of Flicker" on page 30). In general terms, flicker affects our vision process and brain reaction, almost always producing discomfort and deterioration in work quality. In some situations, it can even result in workplace accidents because it affects the ergonomics of the production environment by causing operator fatigue and reduced concentration levels.