SDSU power systems professor, alumnus honored

Reinaldo Tonkoski
Reinaldo Tonkoski

Reinaldo Tonkoski, an associate professor in the South Dakota State University Department of Electrical Engineering and Computer Science, has been honored for his part with an Institute of Electrical and Electronic Engineers work group.

Tonkoski and 21 colleagues from around the world received the 2020 IEEE Power & Energy Society Working Group Recognition Award for the technical report, “Microgrid Stability Definitions, Analysis and Modeling.”

The IEEE Power and Energy Society provides the world's largest forum for sharing the latest in technological developments in the electric power industry, for developing standards that guide the development and construction of equipment and systems, and for educating members of the industry and the general public.

Tonkoski and alumnus Ujjwol Tamrakar were part of a work group that produced the technical report, which was published in April 2018 and included faculty and power industry leaders from around the world. Tamraker earned his doctorate in electrical engineering in May.

The award was announced July 20 and is one of only two work group awards given by the IEEE Power and Energy Society, one for a technical report and one for a standard or guide.

The technical report developed guidelines for analyzing microgrid stability. A microgrid is a group of distributed energy resources—including renewable energy resources, energy storage systems and loads—that operate together locally to serve a certain geographic area (e.g., college campus, hospital complex, business center, neighborhood).

Microgrids exist in various sizes and configurations. They can be large and complex networks with various generation resources and storage units serving multiple loads or small and simple systems supplying a single customer.

Stability analysis in power systems is extremely important because it ensures the ability of the system to return to normal operation within a minimum possible time after having undergone any transience or disturbance.

Tonkoski, who is also a visiting faculty member at Sandia National Laboratories, has been on the SDSU faculty since 2012 and has research interests in grid integration of sustainable energy in power systems, power electronics and control systems. He is also an associate editor for three major IEEE journals.

The full report can be viewed at:

A webinar on the findings can be found at: