Incremental Conductance based Adaptive Poleplacement MPPT Controller Design for Solar Photo Voltaic System

Abstract

The maximum power that could be extracted from the solar panel is necessary to improve the efficiency of a photo voltaic (PV) system. At every changing environmental condition, there will be a certain voltage (Vmpp) at which solar panel delivers maximum power. This voltage should be tracked online accurately, so that the solar panel could be operated at maximum efficiency. This paper presents an effective way to track this voltage accurately. As the solar irradiance changes, the power-voltage (P-V) characteristics of the solar panel also varies. In this paper, the Vmpp is found using incremental conductance method. A boost converter is used to operate the solar panel at Vmpp. The system is dynamic in nature. An auto tuned poleplacement controller is proposed to implement the control action effectively. The controller gains are adjusted online depending on the changes in the system parameters.