Non-chaotic dc-dc converter for solar/wind energy applications by variable structure control

Solar and wind promises to be a clean supply of renewable energy. The variation in the energy level of these sources due to various environmental factors can put together the entire system into chaos. This necessitates robust DC-DC converters that can manage the nonlinear input as well as load discrepancy while staying in the desired operating range. This paper proposes a robust variable structure controller that ensures the stability of the converter over a wide operating range. This makes the converter suitable for energy sources with nonlinear voltage-current characteristics.