Photovoltaic DPP system for maximizing power production method using PV panel bypass circuit

Abstract

This paper is about efficiency enhancement of power capture based on DC power converter by high speed MPPT method in photovoltaic DC power systems. In this paper, approximate Impp measurement method and bypass circuit to high speed MPPT method are applied and verified to increase the power production efficiency of solar panel in the DC power conversion system. P&O algorithm are generally used to control solar panels in the DC power converter such as DDP system. However, the power production efficiency of the solar panel is lowered by lowering the voltage reference value to reduce steady-state ripple. Therefore, this paper presents a method to measure and track the approximate Impp after completely separating the solar panel from the main circuit using the bypass circuit. This can restore power production efficiency within a short period of time and ensure the stability of the system, thereby providing a positive effect to the solar power generation system. Therefore, the generation efficiency could be increased from 61.44 [%] to 99.61 [%]. Copyright © The Korean Institute of Electrical Engineers.