International Journal of Science, Engineering and TechnologyAuthors: Aarthi Bala K R, Dheebiga R, Nithya K, Vidhyasri G
Abstract: Solar PV systems face a key challenge: their output power keeps changing with sunlight and temperature. To deal with this, we developed a single-switch isolated DC-DC boost converter paired with an MPPT algorithm to pull maximum power from a PV panel under varying conditions. The converter uses a flyback-based topology with just one MOSFET switch, keeping the design simple and affordable. An Arduino Nano runs the Perturb and Observe algorithm, constantly checking PV voltage and current and adjusting the PWM duty cycle to stay at the maximum power point. We tested the system in MATLAB/Simulink and converted a 25V PV input to 200V output, achieving a voltage gain of 8 at 50 kHz switching frequency. Converter efficiency came out to 94.8% with MPPT tracking efficiency of 99.2%. The result is a low-cost, practical solution for standalone DC power applications using solar energy.
