Lighting of control rooms in energetics

The use of modern automated process control systems based on display terminals makes it necessary to pay special attention to the creation of optimal conditions for the visual work of personnel. When designing the lighting of such workplaces, special requirements (inadmissibility of excessive lighting and restriction of pulsation) must be taken into account. Lighting control systems for LED light sources use PWM control, while the duty cycle of the signal varies over a wide range. A mathematical model that takes into account the peculiarities of perception of flickering illumination by the organs of vision has been created. Analytical studies have shown that the values of pulse ratio equal to 0.5 increases the probability of visual fatigue, and the increase in the frequency of PWM control is justified from the point of view of the illumination hygienic effect on the organs of vision.