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Power conversion device and method for controlling output impedance of power conversion device

A technology of power conversion device and output impedance, applied in the direction of converting DC power input to DC power output, irreversible DC power input converting to AC power output, output power conversion device, etc., can solve problems such as low accuracy performance

Active Publication Date: 2019-05-31
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a power conversion device and a method for controlling the output impedance of the power conversion device, so as to solve the problem of low accuracy and performance of the method for judging the working state of the power conversion device in the prior art

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  • Power conversion device and method for controlling output impedance of power conversion device
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  • Power conversion device and method for controlling output impedance of power conversion device

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Embodiment Construction

[0070] In the scenario where the photovoltaic power generation system includes an optimizer, there are many on-site wiring, and the optimizer is usually installed on the back of the photovoltaic module (for example, fixed on the bracket of the photovoltaic module or the frame of the photovoltaic module), so during the installation of the photovoltaic system, After the installation of the photovoltaic modules and the optimizer is completed, it is necessary to determine whether the optimizer can work normally, so that the installation of the photovoltaic modules and the optimizer can be guaranteed to be normal after the installation and construction, and there is no need to check the relevant wiring because of the installation of the optimizer. Thereby avoiding the complicated and heavy construction operations required to check the wiring related to the optimizer.

[0071]In the prior art, after a single optimizer is connected to a photovoltaic module and powered on, the output v...

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Abstract

A power conversion device and a method for controlling the output impedance of the power conversion device to solve the problem in the prior art that the method for determining the operating state ofthe power conversion device is low in accuracy. The method includes steps of adjusting the output impedance of the power conversion device to a first impedance when the power conversion device does not satisfy a start condition; and adjusting the output impedance of the power conversion device to a second impedance when the power conversion device satisfies the start condition, wherein the first impedance is not equal to the second impedance.

Description

technical field [0001] The present application relates to the technical field of power converters, in particular to a power conversion device and a method for controlling the output impedance of the power conversion device. Background technique [0002] Photovoltaic (PV) power generation is the most common way of utilizing solar energy, which can directly convert light energy into electrical energy, and has the advantages of high reliability, long service life, and environmental protection. Such as figure 1 As shown, a photovoltaic power generation system generally includes a photovoltaic module, an optimizer and an inverter, wherein the input terminal of the optimizer is connected to the output terminal of the photovoltaic module, which is used to realize the maximum power tracking of the photovoltaic module or fast shutdown. The output ends of two optimizers are connected in series and then connected to the DC input end of the inverter, which can realize the output power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M1/36H02J3/38
CPCH02M1/36H02M7/48G05F1/67H02M3/158H02M3/1582Y02E10/50H02S40/32H02S50/10H02J3/38
Inventor 姚晓锋
Owner HUAWEI DIGITAL POWER TECH CO LTD