An Efficient MPPT Algorithm for Partially Shaded PV Strings

Autor:	Batzelis, E., Papathanassiou, S.
Jazyk:	angličtina
Rok vydání:	2015
Předmět:	OPERATIONS PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS) Balance of System Components
DOI:	10.4229/eupvsec20152015-5ao.9.4
Popis:	31st European Photovoltaic Solar Energy Conference and Exhibition; 1615-1619 Under partial shading conditions, several power peaks (maximum power points - MPPs) are presented on the P-V curve of a photovoltaic system, hindering the effectiveness of typical maximum power point tracking (MPPT) algorithms, due to possible convergence to a local suboptimal MPP. In this paper, a global MPPT (GMPPT) method for PV strings is proposed, which exploits the theoretical MPP characterization to detect the shading conditions and estimate all MPPs on the P-V curve. The calculations performed do not involve unnecessary operating point variations and output power fluctuations. The proposed method is designed for PV strings illuminated at two irradiance levels and only needs the standard voltage and current sensors of the DC/DC converter.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a9318de2e3a0a0c8ae31a7394bfaf22d Zobrazit plný text záznamu