Title

Modeling And Analysis Of Dc-Link Voltage For Three-Phase Four-Wire Two-Stage Micro-Inverter

Abstract

DC-link voltage control plays a key role for two-stage micro-inverter application. Modeling &analysis of dc-link voltage is investigated in this paper. The first-stage circuit employs transient maximum power point tracking method to realize fast MPP tracking without causing output distortion and dc-link variation. In order to keep dc-link voltage constant, injecting current to grid varies with the output of a positive feedback of dc-link voltage regulator at steady situation. Two disturbances to cause dc-link constant are investigated and small signal model of dc-link voltage is also built while considering dynamic response. Followed by the small signal model of dc-link voltage, the dc-link capacitance is also calculated. The performance of dc-link voltage control is verified by experimental results based on a 400 watt two-stage three-phase four-wire prototype with grid-connected, the input voltage from 35V to 60V, dc-link voltage 400Vdc and AC output voltage 110V RMS. © 2014 IEEE.

Publication Date

1-1-2014

Publication Title

Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Number of Pages

3000-3005

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/APEC.2014.6803731

Socpus ID

84900393985 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84900393985

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