Generation control circuit for photovoltaic modules

Photovoltaic modules must generally be connected in series in order to produce the voltage required to efficiently drive an inverter. However, if even a very small part of photovoltaic module (PV module) is prevented from receiving light, the generation power of the PV module is decreased disproport...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2001-05, Vol.16 (3), p.293-300
Main Authors: Shimizu, T., Hirakata, M., Kamezawa, T., Watanabe, H.
Format: Article
Language:English
Subjects:
Choppers
Circuits
Costs
Energy efficiency
Inverters
Lighting control
Maximum power
Modules
Photovoltaic cells
Photovoltaic systems
Power generation
Power generation economics
Power supply
Receiving
Solar cells
Solar power generation
Tracking
Voltage
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Summary:Photovoltaic modules must generally be connected in series in order to produce the voltage required to efficiently drive an inverter. However, if even a very small part of photovoltaic module (PV module) is prevented from receiving light, the generation power of the PV module is decreased disproportionately. This greater than expected decrease occurs because PV modules which do not receive adequate light cannot operate on the normal operating point, but rather operate as loads. As a result, the total power from the PV modules is decreased if even only a small part of the PV modules are shaded. In the present paper, a novel circuit, referred to as the generation control circuit (GCC), which enables maximum power to be obtained from all of the PV modules even if some of the modules are prevented from receiving light. The proposed circuit enables the individual PV modules to operate effectively at the maximum power point tracking, irrespective of the series connected PV module system. In addition, the total generated power is shown experimentally to increase for the experimental set-up used in the present study.
ISSN:0885-8993
1941-0107
DOI:10.1109/63.923760