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Analysis and control of a non-inverter Buck-Boost power DC-DC converter by state-space modeling and applied to PV systems under MPPT operation

This paper describes the feedback closed loop steady-space with reference input and integral action for distributed power photovoltaic systems including Maximum Power Point Tracking (MPPT). In order to validate the control proposal scheme it was applied to the non-inverter Buck-Boost DC-DC power converter. The MPPT considered was the IC algorithm. Results show how this control technique could be applied in power converters in order to regulate the output voltage. The control scheme was able to follow the reference even for dynamic demand behavior. Under MPPT conditions, the PV output voltage seeks the MPPT reference input signal maximizing the output power.