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Photovoltaic solid transformer

A solid-state transformer, photovoltaic technology, applied in photovoltaic power generation, instruments, regulating electrical variables, etc., can solve the problem of low efficiency of isolated DC/DC converters, and achieve the effect of improving efficiency

Active Publication Date: 2018-01-19
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a photovoltaic solid-state transformer to solve the problem of low efficiency of isolated DC / DC converters in the prior art

Method used

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0049] The invention provides a photovoltaic solid-state transformer to solve the problem of low efficiency of isolated DC / DC converters in the prior art.

[0050] Specifically, the photovoltaic solid-state transformer includes three phase circuits, and the three phase circuits can be figure 1 shown in star connection, it can also be figure 2 Delta connection shown; see figure 1 or figure 2 , the phase circuit includes: filters, multiple H-bridge modules and multiple high-voltage isola...

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Abstract

The invention provides a photovoltaic solid transformer. Each of three phase circuits which are connected in a star-shaped or triangular mode of the photovoltaic solid transformer comprises a filter,a plurality of H bridge modules and a plurality of high-voltage isolation type DC / DC converters; MPPT control of the photovoltaic solid transformer is realized by the H bridge modules, so that the high-voltage isolation type DC / DC converter does not need to control MPPT of a photovoltaic plate connected to the photovoltaic solid transformer or regulate voltage in real time, therefore, the value ofa gain range of the high-voltage isolation type DC / DC converter can be small, and compared with the prior art, the high-voltage isolation type DC / DC converter has the characteristic that the efficiency is improved further.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic solid-state transformer. Background technique [0002] In the field of photovoltaic power generation, with the development of power electronics technology, solid-state transformers, a device based on components such as power semiconductors and capacitors and inductors, which have at least the functions of power transformer isolation and voltage transformation, are gradually replacing traditional power transformers; and Integrating the inverter and the solid-state transformer into a whole is called a photovoltaic solid-state transformer. Because of its synergistic effect, its overall benefit is higher than that of a pure solid-state transformer, and it has become the research direction of many scholars and experts. [0003] Photovoltaic solid-state transformers in the prior art are composed of DC / DC and DC / AC. Among them, DC / DC generally adopts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/335H02J3/38
CPCY02E10/56
Inventor 顾亦磊庄加才王新宇徐君
Owner SUNGROW POWER SUPPLY CO LTD
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