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T-shaped nested neutral point clamping hybrid multilevel converter and power generation system

A neutral point clamping, hybrid multi-level technology, applied in high-efficiency power electronic conversion, conversion of AC power input to DC power output, electrical components, etc. Application prospects and the effect of reducing filter inductance

Pending Publication Date: 2020-06-05
JIANGSU GOODWE POWER SUPPLY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the number of converter output levels increases, the components required for diode-clamped multilevel converters and flying capacitor multilevel converters increase exponentially

Method used

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  • T-shaped nested neutral point clamping hybrid multilevel converter and power generation system
  • T-shaped nested neutral point clamping hybrid multilevel converter and power generation system
  • T-shaped nested neutral point clamping hybrid multilevel converter and power generation system

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Experimental program
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Effect test

Embodiment 1

[0043] Embodiment one: as attached figure 1 As shown, a power generation system includes a power generation device, a level shifter, a filter and a grid e g . Among them, the power generation device is a renewable energy power generation device, such as a photovoltaic power generation device. figure 1 China-Israel power supply E dc and resistor R dc equivalent.

[0044] connected to the power generation unit and the grid e g The level converter between adopts T-type nested neutral point clamp hybrid multilevel converter, and the T-type nested neutral point clamp hybrid multilevel converter includes the first high-frequency power electronic switch tube S1 , the second high-frequency power electronic switch tube S2, the third high-frequency power electronic switch tube S3, the fourth high-frequency power electronic switch tube S4, the fifth high-frequency power electronic switch tube S5, and the sixth high-frequency power electronic switch tube S6 , the first low-frequency...

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PUM

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Abstract

The invention relates to a T-shaped nested neutral point clamping hybrid multilevel converter which comprises a first / second / third / fourth / fifth / sixth high-frequency power electronic switch tube, a first / second low-frequency power electronic switch tube and a first / second clamping capacitor. The first / second / fifth / sixth high-frequency power electronic switch tube is connected in series between a positive electrode P point and a negative electrode N point of a power generation device through a node P1, a node A and a node N1; the fourth / third high-frequency power electronic switch tube is connected in series and is connected with the node A; the first / second clamping capacitor is connected in series and then connected in parallel with two ends of the second / fifth high-frequency power electronic switch tube, and the midpoint is connected with the third high-frequency power electronic switch tube; the first / second low-frequency power electronic switch tube is connected in series between the positive P point and the negative N point of the power generation device. According to the invention, the output waveform quality can be further improved; the filter inductance is reduced; the conversion efficiency is improved; the number of power electronic switching devices is reduced; and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of electric energy conversion, and particularly relates to a T-type nested neutral point clamp hybrid multilevel converter and a power generation system using the same. Background technique [0002] Compared with the two-level converter, the multi-level converter has the advantages of small output voltage and current harmonics, small voltage change rate and high efficiency, and has been widely studied and applied in renewable energy power generation systems in recent years. [0003] Traditional multilevel converters have topologies such as diode-clamped, flying-capacitor, and cascaded H-bridges. However, as the number of converter output levels increases, the components required for the diode-clamped multilevel converter and the flying capacitor multilevel converter increase exponentially. The cascaded H-bridge multilevel converter requires an isolated DC power supply. In order to overcome the deficiencies...

Claims

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Application Information

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IPC IPC(8): H02M7/487H02J3/38
CPCH02M7/487H02M1/0054Y02B70/10
Inventor 陈蓉杨勇黄敏方刚卢进军
Owner JIANGSU GOODWE POWER SUPPLY TECHNOLOGY CO LTD
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