Photovoltaic LED direct-current power supply control system

Abstract

The invention discloses a photovoltaic LED direct-current power supply control system which comprises a photovoltaic array, a controller, an energy storage battery, a drive control module, an LED load, a grid-connected inverter and a public supply network. The controller is connected with the photovoltaic array and used for carrying out voltage conversion on direct currents output by the photovoltaic array to charge the energy storage battery and detecting the electric quantity of the energy storage battery. After the electric quantity of the energy storage battery is saturated, redundant electric energy is input to the grid-connected inverter by the photovoltaic array. The drive control module is connected with the energy storage battery and used for carrying out voltage conversion on output voltages output by the energy storage battery to supply power to the LED load. The grid-connected inverter is connected with the photovoltaic array and the public supply network and used for carrying out contravariant conversion on the redundant electric energy output by the photovoltaic array to form alternating currents to be conveyed to the public supply network. Direct-current direct supply is really achieved, conversion links are reduced, the effects of environmental protection and energy saving are achieved, and meanwhile the functions of peak regulation and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a photovoltaic LED DC power supply control system. Background technique [0002] Energy saving and environmental protection is the theme of the times advocated in the current era, and the problem of new energy utilization proposed for the theme of energy saving and environmental protection is a problem that needs to be solved urgently. New energy (NE), also known as unconventional energy, refers to various forms of energy other than traditional energy. Examples include solar energy, geothermal energy, wind energy, ocean energy, biomass energy, and nuclear fusion energy. In addition, new light sources are also one of the main measures for energy saving and environmental protection. For example, the well-known LED light source has been widely promoted and applied due to its high efficiency, long life, energy saving and environmental protection, and will soon become the mainst...

AI Technical Summary

Problems solved by technology

[0003] However, the current LED lighting is mainly powered by mains power, which is used to drive LED lamps after being stepped down and rectified. The main problems are as follows: (1) The mains power is AC, while LED lamps are DC loads. It is necessary to supply the mains power to LED lamps through a series of conversions. This process has many links, low efficiency and is prone to failure; (2) converting the mains power into a power supply for LED lamps will cause LEDs to work due to fluctuations in the grid voltage. The change of the voltage will cause the change of the driving current. The current accuracy is very low, which will reduce the superior performance of the LED and shorten the service life.

Images