Multifunctional photovoltaic UPS (uninterruptible power supply) system and control method thereof

Abstract

The invention discloses a multifunctional photovoltaic UPS (uninterruptible power supply) system and a control method thereof. The multifunctional photovoltaic UPS system comprises a photovoltaic battery, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a fifth switch unit, a DC (direct current) / DC (direct current) unit, a storage battery, a two-way DC / DC unit, an inverter unit and a controller unit, wherein the controller unit is electrically connected with the first unit switch, the second switch unit, the third switch unit, the fourth switch unit and the fifth switch unit; and the inverter unit, the two-way DC / DC unit and the DC / DC unit are electrically connected with the controller unit respectively. The multifunctional photovoltaic UPS system is used for controlling the on-off of the first unit switch, the second switch unit, the third switch unit, the fourth switch unit and the fifth switch unit through the controller unit and has the functions of UPS, photovoltaic off-grid generation and photovoltaic grid generation, and the controller unit is used for optimizing work modes of the system, improving the utilization efficiency of photovoltaic resources and exerting utility to the greatest extent.

Description

technical field [0001] The invention relates to the field of photovoltaic inverter power supplies, in particular to a multifunctional photovoltaic UPS system and a control method thereof. Background technique [0002] With the continuous growth of the world's energy demand and the increasingly serious environmental pollution problems, the development of new energy and renewable energy has been paid more and more attention by countries all over the world. As a new energy industry, photovoltaic power generation has the advantages of green and environmental protection. UPS is a constant voltage and constant frequency uninterruptible power supply with energy storage device and inverter as the main component, which provides uninterrupted power supply for loads. [0003] Photovoltaic power generation products and UPS products currently on the market have single functions, resulting in insufficient utilization of resources. Photovoltaic power generation includes two modes of pho...

AI Technical Summary

Problems solved by technology

[0003] Photovoltaic power generation products and UPS products currently on the market have single functions, resulting in insufficient utilization of resources

Photovoltaic power generation includes two modes of photovoltaic off-grid power generation and photovoltaic grid-connected power generation. At present, the price of photovoltaic battery plates is relatively high, resulting in high cost of photovoltaic power generation. Combining photovoltaic off-grid power generation, UPS and photovoltaic grid-connected power generation functions to achieve The maximum utilization of resources has important value

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