Details

Autor(en) / Beteiligte

• TAN, G. H
• WANG, J. Z
• JI, Y. C

Titel

Soft-switching flyback inverter with enhanced power decoupling for photovoltaic applications

Ist Teil von

• IET electric power applications, 2007-03, Vol.1 (2), p.264-274

Ort / Verlag

London: Institution of engineering and technology

Erscheinungsjahr

2007

Beschreibungen/Notizen

• A novel single-phase flyback inverter for photovoltaic applications is proposed to achieve low-frequency ripple current reduction on the DC busbar and to draw sinusoidal current into the AC grid. Based on capacitive idling techniques, the proposed circuit topology is derived from a single-ended primary-inductance converter and two-switch flyback inverter to obtain soft-switching operation for all of the active switches. Compared with a buck-boost inverter and other flyback inverter topologies for AC photovoltaic module systems, no extra active switches are used in the proposed inverter to realise both soft-switching and enhanced power decoupling with only four active switches. Peak-current mode control method is employed in the control schemes to ensure pure sinusoidal current with unity power factor on the AC grid. Laboratory experimental results based on a 500 W prototype are provided to verify the effectiveness of the proposed inverter.