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DC/DC converter with embedded MPPT for photovoltaic panels

Posted: 16 Sep 2010     Print Version  Bookmark and Share

Keywords:photovoltaic  DC/DC converter  embedded MPPT 

This article describes a DC/DC converter realised in monolithic structure, including the maximum power point tracking algorithm for photovoltaic panels. The device demonstrates a complete paradigm shift from centralized to distributed intelligence in photovoltaic installations, moving a very important function from the usual central inverter, directly to the panel level.

When compared with classical architectures, the resulting distributed DC-DC/MPPT provides better energy harvesting. The monolithic solution also offers a very compact and inexpensive solution compared with the state of the art discrete approach, making use of mixed digital, analogue and power components.

Photovoltaic systems that convert solar energy into electrical energy are divided into two main categories: stand-alone (or off line) and grid-connected.

The first one is commonly used in rural areas and more often as a back-up system for situations when the grid isn�t available due to a natural disaster or human-caused disruption. Even if they are capable of providing AC power for immediate appliance usage, most of the time these systems make use of energy storage devices such as large capacity batteries, where the energy stored during the day will then be used when sunlight is not available.

On the other hand, grid-connected systems are installed in areas where the grid is present and robust, and able to accept energy feeding from the above described photovoltaic systems.

View the PDF document for more information.

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