Control of Cascaded H-Bridge Multilevel Inverter with Individual MPPT for Grid-Connected Photovoltaic Generators
A single-phase cascaded H-bridge multilevel inverter for a grid-connected photovoltaic (PV) system with nonactive power compensation is presented in this paper. To maximize the solar energy extraction of each PV string, an individual maximum power point tracking (MPPT) control scheme is applied, which allows the independent control of each dc-link voltage. A generalized nonactive power theory is applied to generate the nonactive current reference. Within the inverters™ capability, the local consumption of nonactive power is provided to realize power factor correction. A single-phase modular cascaded multilevel inverter prototype has been built. Each H-bridge is connected to a 195 W solar panel. Simulation and experimental results are presented to validate the proposed ideas.
- Research Organization:
- Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE EE Office of Solar Energy Technology (EE-2A)
- DOE Contract Number:
- EE0005342
- OSTI ID:
- 1069284
- Report Number(s):
- DOE/EE0005342-2
- Journal Information:
- IEEE Energy Conversion Congress and Exposition (ECCE), Vol. 2012; Conference: IEEE Energy Conversion Congress and Exposition, Raleigh, NC (United States), 15-20 Sep 2012; ISSN 2329-3721
- Publisher:
- IEEE
- Country of Publication:
- United States
- Language:
- English
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