Grid-connected inverter

An inverter, inverter module technology, applied in the irreversible DC power input into AC power output, AC power input into DC power output, output power conversion devices and other directions, can solve the problem of low conversion efficiency, electromagnetic problems such as poor compatibility, to achieve the effect of improving electromagnetic compatibility

Active Publication Date: 2010-03-10
SHENZHEN KSTAR NEW ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a grid-connected inverter, which aims to solve the problems of low conversion efficiency and poor electromagnetic compatibility in the existing single-phase full-bridge grid-connected inverter

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Embodiment Construction

[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 in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] figure 1 The structure of the grid-connected inverter provided by the embodiment of the present invention is shown, and for the convenience of description, only the parts related to the present invention are shown.

[0020] The grid-connected inverter includes a DC power supply 100, a storage module 200 connected to the DC power supply 100, an inverter module 300 connected to the storage module 200, and an output module 400 respectively connected to the inverter module 300 and the power grid. The inverter also includes a freewheeling circuit 500, which is respectively connected to the inver...

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Abstract

The invention is applicable to the technical field of inverters and provides a grid-connected inverter which comprises a direct current power supply, a storing module which is connected with the direct current power supply, an inversion module which is connected with the storing module, an output module which is connected with the inversion module and a grid respectively and a continuing current circuit which is connected with the inversion module and the output module respectively. In the invention, on the basis of a traditional single-phase full-bridge grid-connected inverter, the grid-connected inverter introduces the continuing current circuit and is matched with a corresponding modulation mode, thus solving the existing problems of the traditional single-phase full-bridge grid-connected inverter when adopting double-polarity modulation and single-polarity modulation and increasing the inversion efficiency and the electromagnetic compatibility of the inverter effectively.

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to a grid-connected inverter. Background technique [0002] Grid-connected inverters are generally divided into photovoltaic grid-connected inverters, wind power grid-connected inverters, power equipment grid-connected inverters and other power generation equipment grid-connected inverters. The grid-connected inverter can directly convert the regenerative clean power generated by photovoltaic arrays and wind generators into sine wave AC power with the same frequency and phase as the grid and feed it into the grid. [0003] When the traditional single-phase full-bridge grid-connected inverter adopts bipolar modulation, the conversion efficiency of the inverter is low, and when the traditional single-phase full-bridge grid-connected inverter adopts unipolar modulation, the inverter The electromagnetic compatibility (EMC, electromagnetic compatibility) performance is poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M1/14H02M7/537H02J3/18
CPCY02E40/30
Inventor 胡高宏陈永华
Owner SHENZHEN KSTAR NEW ENERGY CO LTD
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