MDPI Multidisciplinary Digital Publishing Institute;Basel: MDPI AG
摘要:
摘要： This paper outlines the modeling and controller design of a novel two-stage photovoltaic (PV) micro inverter (MI) that eliminates the need for an electrolytic capacitor (E-cap) and input current sensor. The proposed MI uses an active-clamped current-fed push-pull DC-DC converter, cascaded with a full-bridge inverter. Three strategies are proposed to cope with the inherent limitations of a two-stage PV MI: (i) high-speed DC bus voltage regulation using an integrator to deal with the 2nd harmonic voltage ripples found in single-phase systems; (ii) inclusion of a small film capacitor in the DC bus to achieve ripple-free PV voltage; (iii) improved incremental conductance (INC) maximum power point tracking (MPPT) without the need for current sensing by the PV module. Simulation and experimental results demonstrate the efficacy of the proposed system. 出版者： Basel: MDPI AG 出版日期： 2016-12-01 出處： Energies (Basel), 2016-12, Vol.9 (12), p.993 資源來源： ProQuest - Publicly Available Content Database 版權： Copyright MDPI AG 2016 識別號： ISSN: 1996-1073 識別號： EISSN: 1996-1073 識別號： DOI: 10.3390/en9120993
