Comparison between Three Different Types of Variable Step-Size P&O MPPT Technique

Abstract

The P-V curve of solar cell is nonlinear, depending on both illuminance and temperature. The MPPT technique is compulsory in order to maintain the output power of the solar cell at its maximum value. P&O MPPT technique is the most commonly used in the industry; however, the main problem is to strike a balance between tracking time and tracking accuracy. To solve the problem, variable-step size MPPT algorithms have been reported in the literatures. In this paper, three different types of variable step-size MPPT methods are implemented and compared.