Integrated magnetics based interleaved flyback micropower grid-connected inverter

An interleaved flyback and micro-power technology, which is applied in the direction of irreversible DC power input conversion to AC power output, conversion equipment with intermediate conversion to AC, climate change adaptation, etc., can solve the problem of not helping to reduce the loss of magnetic parts , high working environment temperature, severe temperature changes, etc., to achieve the effect of reducing volume, improving efficiency, and reducing high-frequency eddy current loss

Inactive Publication Date: 2013-01-02
FUZHOU UNIV
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Problems solved by technology

Although soft switching technology can effectively reduce switching losses, it does not help reduce magnetic losses
and figure 1 In the circuit topology, the two transformers are independent, which not only has a larger volume, but also has a relatively large loss
In addition, because it is integrated with the solar panel and exposed to the sun, ...

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  • Integrated magnetics based interleaved flyback micropower grid-connected inverter
  • Integrated magnetics based interleaved flyback micropower grid-connected inverter
  • Integrated magnetics based interleaved flyback micropower grid-connected inverter

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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.

[0019] This embodiment provides an interleaved flyback micro-power grid-connected inverter based on integrated magnetics, including an interleaved flyback conversion circuit using integrated magnetics, characterized in that: the DC voltage of the photovoltaic panel passes through the integrated magnetics The interleaved flyback conversion circuit of the component is transformed into a high-frequency pulse current with a sinusoidal double half-wave envelope whose frequency is twice the grid frequency. The smooth sine wave AC current that can track the grid voltage makes the grid side power factor PF=1.

[0020] Specifically, such as figure 2 As shown, this embodiment provides an interleaved flyback micropower grid-connected inverter based on integrated magnet...

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Abstract

The invention relates to an integrated magnetics based interleaved flyback micropower grid-connected inverter in a two-stage structure. The front stage is an interleaved flyback transform circuit adopting integrated magnetics, wherein interleaved flyback discrete transformers are integrated on one magnetic chip by means of magnetic integration technique. The rear stage is a low-frequency full-bridge inverter circuit, grid-connected current is controlled at the front stage, and power frequency inversion and grid connection are realized by the rear-stage circuit. The integrated magnetics based interleaved flyback micropower grid-connected inverter has the advantages of high power density, high efficiency, low grid-connected current distortion rate, easiness in development, low cost and the like, and is especially suitable for micropower grid-connected inverters.

Description

technical field [0001] The invention relates to an interleaved flyback micro-power grid-connected inverter based on integrated magnetic parts, which is especially suitable for use as an inverter in a micro-power photovoltaic grid-connected power generation system. Background technique [0002] Due to the characteristics of sustainable utilization and low environmental pollution, renewable energy has become an important part of my country's basic national policy of energy conservation and emission reduction. Among many renewable energy sources, solar energy is regarded as one of the ideal future alternative energy sources for mankind due to its advantages such as unlimited reserves, universality of existence, and cleanness of development and utilization. At present, the photovoltaic power generation system architecture mainly includes centralized (Centralized), string (String, including multi-string and single string), and AC module (AC Module). Among them, the centralized t...

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Application Information

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IPC IPC(8): H02J3/38H02M7/48H02M3/28
CPCY02E10/563Y02A30/60Y02E10/56
Inventor 毛行奎王小彬张锦吉
Owner FUZHOU UNIV
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