• Vishwjeet Kumar Mehta
• Shweta Singh
• Ranjeet Pathak

Nowadays, renewable energy resources play an important role in replacing conventional fossil fuel energy resources. Photovoltaic energy is one of the very promising renewable energy resources which grew rapidly in the past few years. The variation of the operating conditions of the Photovoltaic cell array has one major problem Due to this variation, the voltage at which maximum power can be obtained, is also alter. Solar photovoltaic (PV) systems are distributed energy sources that are an environmentally friendly and renewable source of energy. The objective of this paper is to study and analyze PV systems. In this paper, a PV model is used to simulate PV arrays behavior, and then a Maximum Power Point tracking method using variable step size Perturb and observe (P & O) is proposed in order to control the non inverted buck boost DC-DC converter. Each subsystem is modeled and simulated in a Matlab/Simulink environment. Simulation results shows that the proposed variable step size Perturb and observe (P & O) maximum power point tracking method with non inverted buck boost DC-DC converter gives faster response than the conventional perturb and observe method under rapid variations of operating conditions.

PV technology, MPPT, DC-DC converters, Perturb and observe; Variable step-size

"An investigation of photovoltaic system with maximum power point tracking method ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.328-335, July-2018, Available :http://www.jetir.org/papers/JETIR1807945.pdf

"An investigation of photovoltaic system with maximum power point tracking method ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp328-335, July-2018, Available at : http://www.jetir.org/papers/JETIR1807945.pdf