A module-integrated isolated solar micro-inverter without electrolytic capacitors

• Published in: International journal of circuit theory and applications Vol. 42; no. 6; pp. 572 - 583
• Main Authors: Chiu, Huang-Jen, Lo, Yu-Kang, Chuang, Ching-Chun, Yang, Chung-Yu, Cheng, Shih-Jen, Kuo, Min-Chien, Huang, Yi-Ming, Jean, Yuan-Bor, Huang, Yung-Cheng
• Format: Journal Article
• Language: English
• Published: Bognor Regis Blackwell Publishing Ltd 01.06.2014; Wiley Subscription Services, Inc
• Subjects: Capacitance; Conversion; electrolytic capacitor; Electrolytic capacitors; harmonic suppression; maximum power point tracking; module-integrated isolated solar micro-inverter; Photovoltaic cells; Solar cells; Solar power generation; Tracking; Utilities
• ISSN: 0098-9886; 1097-007X
• DOI: 10.1002/cta.1871

This paper presents a module‐integrated isolated solar micro‐inverter. The studied grid‐tied micro‐inverters can individually extract the maximum solar power from each photovoltaic (PV) panel and transfer to the AC utility system. A harmonic suppression technique is used to reduce the DC‐bus capacitance. Electrolytic capacitors are not needed in the studied solar micro‐inverter. High conversion efficiency, high maximum power point tracking accuracy and long lifespan can be achieved. The operation principles and design considerations of the studied PV inverter are analyzed and discussed. A laboratory prototype is implemented and tested to verify its feasibility. Copyright © 2012 John Wiley & Sons, Ltd. This paper presents a module‐integrated isolated solar micro‐inverter. The studied grid‐tied micro‐inverters can individually extract the maximum solar power from each photovoltaic (PV) panel and transfer to the AC utility system. A harmonic suppression technique is used to reduce the DC‐bus capacitance. Electrolytic capacitors are not needed in the studied solar micro‐inverter. High conversion efficiency, high maximum power point tracking accuracy and long lifespan can be achieved.