Smart control of power electronic converters in Photovoltaic systems Conference

Mohamed, A, Mohammed, OA. (2012). Smart control of power electronic converters in Photovoltaic systems .

cited authors

  • Mohamed, A; Mohammed, OA

authors

abstract

  • This paper presents an overview of the techniques used to control the power electronic converters used to integrate renewable energy sources to the electric grid. Moreover, a smart fuzzy-PID controller for DC-DC boost converters, which are the most commonly used converters as voltage regulators in Photovoltaic (PV) systems, is presented. Details about the educational side of these concepts; in-class, simulation and experimental demonstrations are also included. The proposed fuzzy-PID controller maximizes the stable operating range by tuning the PID parameters ultimately at various loading conditions. Then, a fuzzy logic approach is used to add a factor of intelligence to the controller such that it can detect a change in the operating point and move among different values of proportional gain (Kp), integral gain (Ki) and derivative gain (Kd) based on the system conditions. This controller allows optimal control of boost converters at any loading condition with no need to retune parameters or possibility of failure. Moreover, the paper presents the methodology to teach a novel technique to move between the PI and PID configurations of the controller such that the minimum overshoot and ripple are obtained, which increases the controller applicability for utilization of PV systems in supplying sensitive loads. This paper gives an excellent educational presentation of several aspects related to control theory, renewable energy engineering and power electronics. © 2012 American Society for Engineering Education.

publication date

  • January 1, 2012