Photovoltaic power system and communication base station electric power all-in-one machine

Abstract

The invention relates to a photovoltaic power system. The photovoltaic power system comprises a photovoltaic power generation module, a conversion device and a control unit; the conversion device is connected with the photovoltaic power generation module; the control unit controls the conversion device, wherein the conversion device comprises a first direct current / direct current conversion module connected with the photovoltaic power generation module, a second direct current / direct current conversion module connected with the first direct current / direct current conversion module, and a direct current / alternating current conversion module connected with the first direct current / direct current conversion module. The photovoltaic power system converts the direct current output by the photovoltaic power generation module into high-voltage direct current firstly, and then the high-voltage direct current is converted into corresponding alternating current or low-voltage direct current; the low-voltage current is directly used for supplying power for direct current load; the direct current conversion efficiency is greatly improved by ensuring the alternating current conversion efficiency at the same time; and in addition, the conversion operations are all finished through the conversion device, so that the conversion cost is reduced.

Description

technical field [0001] The invention relates to the field of photovoltaic power supply, in particular to a photovoltaic power system and a communication base station power integrated machine. Background technique [0002] The problem of energy shortage is a very important problem in the 21st century, and the best way to solve this problem is to use solar power, which has the advantages of being widely distributed and almost inexhaustible. Solar photovoltaic has been widely used as a pollution-free new energy. [0003] However, no matter whether the existing photovoltaic power generation systems are independent, grid-connected or distributed, few can output both alternating current and direct current. Generally, the photovoltaic power generation system converts the direct current output by the photovoltaic power generation module into alternating current of appropriate voltage through the inverter. The DC output efficiency of AC and DC photovoltaic power generation systems ...

AI Technical Summary

Problems solved by technology

[0003] However, no matter whether the existing photovoltaic power generation systems are independent, grid-connected or distributed, there are few that can output both alternating current and direct current.

Generally, the photovoltaic power generation system converts the direct current output by the photovoltaic power generation module into alternating current of appropriate voltage through the inverter. The DC output efficiency of AC and DC photovoltaic power generation systems is low, and additional conversion devices are required, and the cost is also high

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