Photovoltaic Power Conditioning System With Line Connection

A photovoltaic (PV) power conditioning system (PCS) with line connection is proposed. Using the power slope versus voltage of the PV array, the maximum power point tracking (MPPT) controller that produces a smooth transition to the maximum power point is proposed. The dc current of the PV array is e...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2006-06, Vol.53 (4), p.1048-1054
Main Authors: Kwon, J.-M., Nam, K.-H., Kwon, B.-H.
Format: Article
Language:English
Subjects:
Arrays
Boost converter
Direct current
inverter
Joints
Linear feedback control systems
Maximum power
maximum power point tracking (MPPT)
Microcontrollers
Personal communication networks
photovoltaic (PV) power conditioning system (PCS)
Photovoltaic cells
Photovoltaic systems
Power conditioning
Power factor
Reactive power
Sensor arrays
Software prototyping
Solar cells
Solar power generation
Voltage control
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Description
Summary:A photovoltaic (PV) power conditioning system (PCS) with line connection is proposed. Using the power slope versus voltage of the PV array, the maximum power point tracking (MPPT) controller that produces a smooth transition to the maximum power point is proposed. The dc current of the PV array is estimated without using a dc current sensor. A current controller is suggested to provide power to the line with an almost-unity power factor that is derived using the feedback linearization concept. The disturbance of the line voltage is detected using a fast sensing technique. All control functions are implemented in software with a single-chip microcontroller. Experimental results obtained on a 2-kW prototype show high performance such as an almost-unity power factor, a power efficiency of 94%, and a total harmonic distortion (THD) of 3.6%
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2006.878329