I am interested in all aspects of innovations in renewable energy systems for the conversion, delivery, and its use in electrical form. The aim is to contribute in expanding the utilization of renewable energy resources in the world by addressing technical challenges impeding their utilization, including reducing their cost, and improving their overall efficiency, operation, control, integration and reliability. One of our targets is to enable high penetration of solar energy onto the electric grid by addressing associated technical challenges:

Grid Performance and Reliability: focuses on achieving high penetration at the distribution level and on the transmission grid in a  safe, reliable and effective cost.
Power Electronics: to develop devices with advanced control structures that maximize the power output from the renewable energy systems and and also ensure a safe, reliable, and controllable interface to the electric grid.
Dispatchability: our vision is to enable the grid connected solar energy systems to be dispatched in a way similar or better than conventional power plants.
Featured Contributions:

We have extensively worked on solar PV systems, and some of the featured contributions are summarized:

  • A reduction in the heavy computational time needed for simulating large, partially shaded PV systems has been provided by a proposed PV circuit model, which offers comparable accuracy but requires less computational time.
  • The estimation of power peaks for partially shaded PV systems is now possible in a few seconds as opposed to the few hours previously required with existing methods. This was also utilized for the first-time development of a model-based MPPT for partially shaded PV systems which improves the dynamics of the tracking.
  • The use of MPPT methods that combine model-based and heuristic techniques, which feature reduced tracking power losses, has been facilitated by reducing their cost and complexity through the elimination of the previously required temperature measurements.
  • Misleading power losses have been eradicated for partially shaded PV systems through the development, for the first time, of a model-based MPPT method for use with partially shaded PV systems. The new method avoids the curve scanning required with existing MPPT methods.
  • Mismatch power losses in partially shaded PV systems have been minimized by the development of a new reconfiguration algorithm that reduces the time delay inherent in existing methods.

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