An adaptive solar photovoltaic array reconfiguration method based on fuzzy control

Abstract

As the complicated structure of the PV generation systems and variety of application environments, the mismatch and hot spot phenomena caused by partial shade or non-uniform illumination not only heavily affect the output characteristics of photovoltaic arrays, but also create safety and reliability problems. This paper proposes a self-adaptive reconfiguration method based on fuzzy control, introduces how to apply it to the photovoltaic power generation systems, and explains why fuzzy control based on the shading degree of PV arrays can quickly respond to the changes of external environments. The experimental results show when the partial shade phenomenon occurs, changing the connections of the solar PV submodules using switching matrix can quickly reduce the loss of output power.