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Power conversion device and system

A technology of electric energy conversion and circuit, which is applied in the direction of circuit device, output power conversion device, AC power input conversion to AC power output, etc. It can solve the problems of harmonic pollution, high cost, low power factor, etc., and improve the feedback power factor, improved form factor, and high conversion efficiency

Inactive Publication Date: 2011-11-30
新能动力(北京)电气科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a power conversion device to solve the problems of serious harmonic pollution, low power factor and high cost in the prior art when power generation equipment feeds back electric energy to the grid

Method used

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] Figure 5 It is a schematic circuit diagram of the single-phase rectifier bridge circuit in the electric energy conversion device according to the first embodiment of the present invention.

[0032] Such as Figure 5 As shown, the electric energy conversion device in the first embodiment of the present invention is Figure 5 The part in the dotted line box 50, this power conversion device includes three rectifier bridge circuits, each rectifier bridge circuit includes a first input terminal and a second input terminal, for example, in the rectifier bridge circuit in the dotted line box 51, the first The input end and the second input end are point A and point B respectively. exist ...

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Abstract

The disclosure discloses an electric energy conversion device and system, to solve the problems of severe harmonic pollution, low power factor during the electric energy feedback from a power generation device to a power grid in the conventional art. The electric energy conversion device comprises: a plurality of single-phase rectifier bridge circuits, a first input ends of the a plurality of single-phase rectifier bridge circuits are connected with an output end of each phase of an Alternating Current (AC) power supply one to one, and a second input ends of the a plurality of single-phase rectifier bridge circuits are connected together; and a plurality of three-phase fully-controlled bridge circuits, wherein two input ends of each three-phase fully-controlled bridge circuit are connected with two output ends of each the rectifier bridge circuit respectively, or, two input ends of each the three-phase fully-controlled bridge circuit are connected with two output ends of each the rectifier bridge circuit through an inductor respectively. Through the technical solution of the disclosure, the waveform coefficient of the current of the power generation device is improved, the harmonic wave is reduced, and the power factor is improved.

Description

technical field [0001] The present invention relates to the technical field of power electronics, in particular, to an electric energy conversion device and system. Background technique [0002] The power generation and utilization of renewable energy such as wind power, solar power, and tidal power have attracted more and more attention. The general characteristics of these new energy power generation systems are scattered power generation equipment, small single-unit capacity, wide distribution area, and unstable output voltage and current. How to feed back the power generated by these renewable energy power generation The transformation of electric energy generated by power generation equipment into three-phase electricity that can be directly used by industry and civilian use is an urgent problem to be solved in my country and the world. [0003] A kind of wind power generation power feedback equipment in the prior art adopts an AC excitation wire-wound rotor double-fed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/01H02J3/18H02M1/00
CPCH02J3/1835H02M2001/0074Y02E40/30H02M2001/008H02M5/45H02M5/458H02M1/0074H02M1/008
Inventor 张东胜
Owner 新能动力(北京)电气科技有限公司
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