Photovoltaic power generation system using bypass type direct current converters
A photovoltaic power generation system and DC converter technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve problems such as heat loss, power loss, high cost, etc., and achieve the effects of reducing conversion power, simple design, and cost reduction
Inactive Publication Date: 2015-06-10
ALTENERGY POWER SYST
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Problems solved by technology
The power conversion circuit of the converter must handle all the power output by the photovoltaic panel, which requires the design of the corresponding power, including energy storage devices, switching devices, etc., resulting in high cost
The power loss also corresponds to the power, resulting in corresponding power loss, heat loss and other problems
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[0030] The present invention will be further described below in conjunction with specific embodiment and accompanying drawing, set forth more details in the following description so as to fully understand the present invention, but the present invention can obviously be implemented in many other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific embodiment should not limit the protection scope of the present invention.
[0031] image 3 It is a schematic structural diagram of a photovoltaic power generation system using a bypass DC converter according to an embodiment of the present invention. It should be noted that this and other subsequent drawings are only examples, which are not drawn according to the same scale, and should not be taken as limitations on the protection scope of the actual ...
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The invention provides a photovoltaic power generation system using bypass type direct current converters. The photovoltaic power generation system using the bypass type direct current converters comprises a plurality of solar photovoltaic panels, the direct current converters and an inverter, wherein a cable string which is input by the inverter is divided into a first substring and a second substring; the first substring is formed by connecting output positive electrodes of the solar photovoltaic panels and output negative electrodes of the solar photovoltaic panels in series, the output of each solar photovoltaic panel is correspondingly connected with the output of a direct current converter, and the second substring is formed by connecting input positive electrodes of the direct current converters and input negative electrodes of the direct current converters in series. By means of the photovoltaic power generation system, the switching power can be lowered, the design of electric switching circuits is simplified, the cost is lowered, and the reliability is improved.
Description
technical field [0001] The present invention relates to the technical field of distributed power generation, in particular, the present invention relates to a bypass-type DC converter and a high-efficiency photovoltaic power generation system based on the bypass-type DC converter. Background technique [0002] figure 1 It is a schematic diagram of a connection mode between a solar photovoltaic panel and an inverter in a photovoltaic power generation system in the prior art. like figure 1 As shown, solar photovoltaic panels (PV) are usually connected in series with each other and then input into an inverter to generate alternating current that is fed into the grid or used by a power supply. The output current of the photovoltaic panels connected in series is limited by the photovoltaic panel with the lowest current, which means that each photovoltaic panel does not work at the maximum power point and does not output the maximum power. [0003] The existing series converter...
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IPC IPC(8): H02S40/36H02S40/32
CPCH02S40/00Y02E10/50
Inventor 罗宇浩
Owner ALTENERGY POWER SYST