Solar photovoltaic and commercial power combined power supply system and control method thereof

Abstract

The invention discloses a solar photovoltaic and commercial power combined power supply system and a control method thereof, and belongs to the field of new energy power supply systems. The structure of the system comprises a photovoltaic array, a commercial power supply, a DC / DC converter, a PFC converter and a DC / AC inverter, wherein the photovoltaic array and the commercial power supply are connected with a direct current bus through the DC / DC converter and the PFC converter respectively and supply power to an alternating current load through the DC / AC inverter. In the invention, for fullyutilizing solar, the DC / DC converter can operate with the maximum power of a photovoltaic battery; meanwhile, the commercial power is used as an auxiliary power supply, three power supply modes are realized, and the stable work of the load under various conditions is ensured.

Description

technical field [0001] The invention relates to a power supply system, in particular to a power supply system combined with a solar photovoltaic array and mains power and a power supply control method thereof, belonging to the field of new energy power supply systems. Background technique [0002] With the continuous improvement of human living standards, the demand for energy has increased significantly. As a non-renewable energy source, fossil energy is becoming increasingly exhausted, and the environmental pollution it causes is becoming increasingly serious. As a green new energy power supply method, solar photovoltaic power supply has been more and more applied. Its biggest advantage is that it can be regenerated and has no pollution to the environment. [0003] The biggest characteristic of solar photovoltaic cells is that the external characteristic curve changes with light intensity and temperature. In order to maximize the use of solar energy, the DC converter is ...

AI Technical Summary

Problems solved by technology

[0004] The currently proposed solar power supply system cannot guarantee the continuous and stable operation of the load. Therefore, in order to fully use the solar energy and ensure that the load can work normally and stably at all times, an auxiliary power supply must be added to supply power to the load when the solar photovoltaic cannot meet the requirements. as a backup when needed

Images