LAPSE:2019.0304
Published Article
LAPSE:2019.0304
Modeling and Controller Design of PV Micro Inverter without Using Electrolytic Capacitors and Input Current Sensors
Faa Jeng Lin, Hsuang Chang Chiang, Jin Kuan Chang
February 27, 2019
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.
Keywords
active-clamped current-fed push-pull DC-DC converter, incremental conductance maximum power point tracking, input current, ripple voltage cancellation technique, sensorless
Suggested Citation
Lin FJ, Chiang HC, Chang JK. Modeling and Controller Design of PV Micro Inverter without Using Electrolytic Capacitors and Input Current Sensors. (2019). LAPSE:2019.0304
Author Affiliations
Lin FJ: Department of Electrical Engineering, National Central University, Taoyuan 32001, Taiwan
Chiang HC: Department of Electrical Engineering, National United University, Miaoli 360, Taiwan
Chang JK: Department of Electrical Engineering, National Central University, Taoyuan 32001, Taiwan
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Journal Name
Energies
Volume
9
Issue
12
Article Number
E993
Year
2016
Publication Date
2016-11-25
Published Version
ISSN
1996-1073
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PII: en9120993, Publication Type: Journal Article
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LAPSE:2019.0304
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doi:10.3390/en9120993
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Feb 27, 2019
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CC BY 4.0
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[v1] (Original Submission)
Feb 27, 2019
 
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Feb 27, 2019
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Original Submitter
Calvin Tsay
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