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Extended Operation Range of Photovoltaic Inverters by Current Waveform Shaping

Bruske, Sebastian; Carne, Giovanni ORCID iD icon; Buticchi, Giampaolo; Liserre, Marco; Zhang, He

Abstract:

The grid connection of photovoltaic voltage source inverters depends on the dc-link voltage level that can be supplied
by the maximum power tracking of the photovoltaic system. The inverter disconnects from the grid, if the minimum required dc link voltage level is violated, which leads to unwanted energy curtailments implying losses to the system owner. This paper proposes to apply current waveform shaping to the inverter current in order to reduce the peak value of the voltage waveform at the point of common coupling by which the minimum required dc-link voltage level for power injection is reduced. This extended operation range of photovoltaic inverters is achieved through third harmonic current injection and can be applied to single-phase and three-phase, four-wire inverters without additional converter stages. A control structure for harmonic current injection and harmonic phase determination is presented and validated by simulations and the analysis is verified by experiments.


Postprint §
DOI: 10.5445/IR/1000124070
Veröffentlicht am 30.09.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 02.2021
Sprache Englisch
Identifikator ISSN: 0885-8993, 1941-0107
KITopen-ID: 1000124070
HGF-Programm 37.06.01 (POF III, LK 01) Networks and Storage Integration
Erschienen in IEEE transactions on power electronics
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Band 36
Heft 2
Seiten 1693–1707
Vorab online veröffentlicht am 01.07.2020
Schlagwörter Photovoltaic inverter, harmonic injection, current waveform shaping, distributed generation
Nachgewiesen in Dimensions
Scopus
Web of Science
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
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