Estimation of Multi-Phase Currents Using DC Bus Current and Switching State

The voltage of solar cell strings can be controlled in residential photovoltaic systems using a multi-phase convertor. How-ever, multi-phase convertors require a few current sensors. The authors examined how to reduce the current sensor for each phase of a multi-phase convertor. This paper presents...

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Veröffentlicht in:	Denki Gakkai ronbunshi. D, Sangyō ōyō bumonshi 2019/11/01, Vol.139(11), pp.947-956
Hauptverfasser:	Kawai, Yuu, Okuda, Tatsuya
Format:	Artikel
Sprache:	jpn
Schlagworte:	common current sensor technique Data buses DC bus current sensor Direct current Estimating techniques multi-phase chopper multi-phase convertor Multiphase Photovoltaic cells Residential energy Solar cells Switching
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container_title	Denki Gakkai ronbunshi. D, Sangyō ōyō bumonshi
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creator	Kawai, Yuu Okuda, Tatsuya
description	The voltage of solar cell strings can be controlled in residential photovoltaic systems using a multi-phase convertor. How-ever, multi-phase convertors require a few current sensors. The authors examined how to reduce the current sensor for each phase of a multi-phase convertor. This paper presents the analysis of a multi-phase convertor based on DC bus current, phase currents, and switching state, and it proposes an estimation method for multi-phase currents. The estimation method can be implemented with constant sampling frequency. Experimental results demonstrate the validity of the estimation method of multi-phase currents for current-controlled three-phase convertor.
doi_str_mv	10.1541/ieejias.139.947
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source	Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; J-STAGE (Japan Science & Technology Information Aggregator, Electronic) Freely Available Titles - Japanese
subjects	common current sensor technique Data buses DC bus current sensor Direct current Estimating techniques multi-phase chopper multi-phase convertor Multiphase Photovoltaic cells Residential energy Solar cells Switching
title	Estimation of Multi-Phase Currents Using DC Bus Current and Switching State
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