Modeling of the Adjustable DC Voltage Source for Industrial Greenhouse Lighting Systems

The article considers issues related to the implementation of energy-efficient power supply modes for high-pressure discharge lamps (HID lamps). In comparison with the standard AC power supply mode, the proposed DC power supply approach with a cyclic change in the polarity of the supply voltage allows to increase the light output by up to 20%. The purpose of the article is to develop a mathematical model of a regulated DC source necessary for controlling the light flux during operation. The developed model reflects the dependence of the effective value of the load voltage on the ratio of the load resistance to the internal resistance of the power supply, the conditional frequency and the fill capacity factor when powered from a single-half-period rectifier. The presented model makes it possible to optimize the mode of changing the electrical parameters of the electronic ballast when regulating the light flux of high-pressure discharge lamps. The model was tested by simulation modeling in the Multisim environment, which showed the high efficiency of the obtained dependencies. The use of the developed mathematical tools in the design of electronic ballast devices will make it possible to effectively control the light output. This mode can be used for lighting industrial greenhouse complexes.