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

A solar photovoltaic and power supply system technology, applied in photovoltaic power generation, control/regulation systems, high-efficiency power electronic conversion, etc., can solve problems such as work, unable to guarantee continuous and stable load, and achieve the effect of continuous and stable work

Inactive Publication Date: 2011-01-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

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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

Method used

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

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Embodiment Construction

[0022] The structure of the power supply system of the present invention is as figure 1 As shown, it includes a photovoltaic array, a mains power supply, a DC / DC converter, a PFC (power factor correction) converter and a DC / AC inverter, wherein: the output of the photovoltaic array is connected to the DC bus through the DC / DC converter, The output of the mains power supply is connected to the DC bus through the PFC converter, the input end of the DC / AC inverter is connected to the DC bus, and the output of the DC / AC inverter supplies power to the AC load.

[0023] The specific circuit of the power supply system of the present invention is as figure 2 shown. The DC / DC converter is composed of Boost circuit 1, full bridge converter 2 and rectification filter circuit 3 connected in series; the PFC converter is composed of PFC rectifier circuit 4 connected to Boost PFC circuit 5; the DC / AC inverter is composed of The inverter circuit 6 is connected to the filter output circuit ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/00H02M3/335H02M1/42
CPCY02E10/56Y02B70/126Y02B70/10Y02P80/10
Inventor 王伟金科
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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