期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 28, 期 6, 页码 2895-2911出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2012.2227279
关键词
Photovoltaic cells; solar energy; solar power generation
资金
- Lien-Chang Electronics Enterprise Company Ltd. [991206]
- National Science Council [NSC 99-2632-E-033-001-MY3, NSC 100-2221-E-415-001, NSC 101-2221-E-033-051-MY2]
This paper presents a two-phased tracking that forms a photovoltaic (PV) power-increment-aided incremental-conductance (PI-INC) maximum power point tracking (MPPT) to improve the tracking behavior of the conventional INC MPPT. The PI-INC MPPT performs, using either variable-frequency constant-duty control (VFCD) or constant-frequency variable-duty control (CFVD), with reference to a collectively called threshold-tracking zone (TTZ), beyond which a power-increment (PI) tracking along the P-pv-V-pv curve executes and within which an INC tracking along the I-pv-V-pv curve toward maximum power point (MPP) does. Delay tracking due to ambiguous conductance-increment detection in the flat portion of the left-hand side of the MPP along the I-pv-V-pv curve will not appear in the PI-INC MPPT by using the PI tracking with clear and correct power-increment detection along the P-pv-V-pv curve. In addition, the merit of INC MPPT to accurately track against the random solar insolation change still retains in the PI-INC MPPT that uses INC tracking toward MPP along the I-pv-V-pv curve when tracking in the TTZ. Modeling and analysis of two typical PV power converters with VFCD and CFVD controls are addressed for implementing the tracking of the PI-INC MPPT in design and experiment. The tracking behavior of PI-INC MPPT and the conventional INC MPPT is assessed and compared through elaborate experimental tests.
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