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INCREMENTAL CONDUCTANCE ALGORITHM USED IN APROGRAMMABLE MICROCONTROLLER AS MAXIMUM POWER POINT TRACKER

Marius Marcu, Titu Niculescu, Florin Popescu, Razvan Slusariuc

Abstract

The conversion of the solar energy depends mostly on the irradiance of the Sun at the level of the photovoltaic panel. Another significant factor that modifies the solar energy conversion is the temperature at the surface of the PV panel. The energy output of the Sun is fairly constant, but the solar irradiance varies significantly from one hour to another and changes throughout the day. In this paper we are presenting the design of a simple but effective MPPT (Maximum Power Point Tracker) charge controller based on incremental conductance algorithm embedded into Atmega 2560 microcontroller so this problem can be solved with this battery charge controller using an MPPT algorithm. The voltage of the solar panels operating at their peak power point at Standard Testing Conditions is 25CпїЅ is higher than the batteryпїЅs voltage. As solar module operating temperature goes down, the voltage increases so the MPPT controller is able to capture the excess module voltage to charge the batteries. As a result, a MPPT controller in low temperature conditions can produce up to 20% пїЅ 25%. The charge controller will use the microcontroller, DC-DC buck boost circuit, sensors that will read the electrical information from the photovoltaic panel and the battery. The goal is to have efficient charging of the battery bank using this MPPT algorithm implemented in the microcontroller.

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DOI resolver: doi.org/10.5593/sgem2017/42/s17.046

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