Cascade Operation of DC-DC Boost Converters in Solar PV System with Individual MPPT Controllers

Abstract: This paper presents Cascade Operation of DC-DC Boost converters with the implementation of individual MPPT controller for each converter. These MPPT controllers track the maximum power from their respective solar photovoltaic panels operating at different irradiation levels. The output voltage of the Cascaded System is delivered to another DC-DC Boost converter which provides the output voltage of required level and reduced ripples. The level of the power delivered to load increases when the load is fed through another DC-DC Boost Converter. This paper also considers the flexibility of operating PV panels at different points and the effect of local panel shadings.

Keywords: PV Array, MPPT, DC-DC Converter, Cascade operations.