Design and Build Solar Charger With Maximum Power Point Tracking (MPPT) And Proportional Integral Derivative (PID) Control For Lithium-Ion Battery Charging
Rancang Bangun Solar Charger Dengan Maximum Power Point Tracking (MPPT) Dan Kontrol Proportional Integral Derivative (PID) Untuk Pengisian Baterai Lithium-Ion
Solar charger is a tool to charge battery energy by using solar panel. Generally, the process of battery charging using solar charger still uses the Constant Current – Constant Voltage method. The application of Constant Current – Constant Voltage method on solar charger has a flaw on Constant Current mode, when the solar panels is not able to reach the specified current, then a voltage drop will occur so that there is no charging on the battery. The problem faced by using solar charger is the fluctuating output of solar panels is influenced by several parameters, those are temperature, light intensity, and the given load. As of that a control is needed which can track so that the solar panel output can be maximized for battery charging. In this research, by using buck converter as solar charger and MPPT modified incremental conductance as the method in order to search the maximum output power of the solar panel and PID analytical method is used to produce constant output voltage of converter for Li-Ion battery charging. Based on maximum tracking of MPPT modified incremental conductance method at 1000W/m2 Irradiance with a duty cycle of 70% produces 99.53W of maximum power output of buck converter, 12.52V of output voltage of buck converter and 7.95A current. PID Control with parameter values such as KP = 7.8 KI = 50000, and KD = 0.000304 is used to get constant output voltage of 12.6 V of buck converter.
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