1. Micro-inverter fed solar Photovoltaic power generation system
Global Renewable Energy Summit, White Orchid Convention Center, Bangalore, 23rd – 25th April, 2015
Micro-inverter fed solar Photovoltaic power generation system
Central Inverter: Poor redundancy
High Efficiency
String Inverter: Partial shading issue.
DC Cabling: High current stress
Expensive
Micro-Inverter:
Total power converter integrated with panel
Usually Single-phase output(LT)
No dc cabling , hence no dc protection requirement
Maximum possible energy extraction from panels(25-30% increase on annual aggregate)
2-stage power conversion system(variable DC-fixed VDC-LTAC)commercially deployed.
Inverter topology : H-bridge(isolation and reduce size of filtering)
DC-DC converter topology : Resonant Converter based(inherent soft switching)
Series LCL : inherent dc blocking capability
Transformer leakage can doubled as series inductance
Usually frequency controlled (Parameter variation affects gain)
P.Elanchezhian
Senior Research Fellow,
Energy Efficiency and Renewable Energy Division,
Central Power Research Institute,
Prof. Sir. C. V. Raman Road,
Bangalore
Ph: