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Power conversion device and ground impedance value detection method

A technology of power conversion and ground impedance, applied in output power conversion devices, power supply testing, impedance measurement, etc.

Inactive Publication Date: 2018-01-16
DELTA ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, if the insulation of the power conversion equipment to the ground is poor, it is easy to generate leakage, which will lead to equipment failure or accidents

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  • Power conversion device and ground impedance value detection method
  • Power conversion device and ground impedance value detection method
  • Power conversion device and ground impedance value detection method

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Embodiment Construction

[0059] The following is a detailed description of the embodiments in conjunction with the accompanying drawings to better understand the embodiments of the present case, but the provided embodiments are not intended to limit the scope of the disclosure, and the description of the structure and operation is not intended to limit it. The order of execution, any recombined structure of components, and devices with equivalent technical effects are all within the scope of the present disclosure. In addition, according to industry standards and common practice, the drawings are only for the purpose of assisting explanation, and are not drawn according to original scale. In fact, the dimensions of various features can be arbitrarily increased or decreased for the convenience of illustration. In the following description, the same components will be described with the same symbols for easy understanding.

[0060] Unless otherwise specified, the terms used throughout the specification ...

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Abstract

The invention provides a power conversion device and a ground impedance value detection method. The power conversion device comprises a DC-DC conversion circuit, a DC-AC conversion circuit and an insulation detection circuit, wherein the DC-DC conversion circuit is used for converting DC input voltage to DC bus voltage; the DC-AC conversion circuit is electrically connected with the DC-DC conversion circuit for converting the DC bus voltage to AC voltage; and the insulation detection circuit is electrically connected between the DC-DC conversion circuit and the DC-AC conversion circuit for detecting the ground impedance value of the power conversion device according to the DC bus voltage. The power conversion device provided by the invention can improve the detection accuracy of the groundimpedance value of the power conversion device.

Description

technical field [0001] The present disclosure relates to the technical field of power converters, in particular to a power converter capable of detecting ground impedance. Background technique [0002] In the existing solar power generation system, in order to be connected in parallel with the mains power, it is necessary to set up a power conversion device to convert the direct current output by the solar module into alternating current. [0003] However, if the insulation of the power conversion equipment to the ground is poor, electric leakage is likely to occur, which in turn leads to equipment failure or accidents. For this reason, power conversion equipment needs to provide a ground impedance detection function to ensure the normal operation of the equipment. Contents of the invention [0004] An embodiment of the present disclosure is a power conversion device. The power conversion device includes: a DC-DC conversion circuit for converting a DC input voltage into ...

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Application Information

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IPC IPC(8): G01R27/18G01R31/14G01R31/40H02M1/00H02M3/07H02M7/5387
Inventor 蔡宗翰侯博仁顾振维林信晃
Owner DELTA ELECTRONICS INC