Close Menu

ECE Research Seminar Series

Event Date 

November 16, 2018 - 12:45pm to 1:45pm


Siegel Hall Auditorium
3301 S. Dearborn
Chicago, IL 60616


The Electrical and Computer Engineering Department is honored to present our seminar speaker, Dr. Mohammad Amin, Senior Research Associate, ECE, IIT, and his talk, "Integration of Wind Power: Stability and Interaction Issues"


Field experience has shown that subsynchronous oscillation and harmonic resonance can occur in the large-scale integration of wind farms into the grid. The oscillations can appear in the presence of background harmonics due to the interaction of the wind energy conversion system’s (WECS’s) converter controller, and the impact of the interconnection system impedance. However, the root causes of these oscillations observed in the field are not entirely understood and they can be attributed to various sources within the components and controllers of the interconnected system. This work discusses the possible causes of these oscillations by investigating the impact of controllers and components in the wind farm (WF) and in the voltage-source converter-based HVDC transmission system. In order to understand this phenomenon, the impedance of the WF from the ac collection point is analytically derived to identify potential resonance points. The impedance frequency responses of the WF indicate the potential resonance at low frequency. The origin of these oscillations can be attributed to the propagation of the WECS resonance through the WECS full converter dc link and the interaction between the WECS and the HVDC system. Once the source and the load impedance are identified, an impedance-based stability method is adopted in order to determine the stability. In an attempt to improve the oscillatory phenomena, an active damping scheme is implemented in the control of the converter. An alternative solution for mitigating such instability and interaction problem is proposed to use the Virtual Synchronous Machine-based controller for the WECS converters.


 Mohammad Amin received the M.Sc. degree in electric power engineering from the Chalmers University of Technology, Sweden, and the Ph.D. in Engineering Cybernetics from Norwegian University of Science and Technology, Norway in 2011 and 2017, respectively. From 2011 to 2013, he was an Assistant Professor with the Dept. of Electrical and Electronic Engineering at International Islamic University Chittagong. In 2015, he was a visiting scholar at the Shanghai Jiao Tong University in China. Currently, Dr. Amin is a senior research associate at the Illinois Tech SYNDEM Smart Grid Lab in the Dept. of ECE at Illinois Institute of Technology. Dr. Amin has research experiences from five countries: USA, Norway, China, Sweden, and Bangladesh.  His research interest includes Power electronics application to the power system, power electronics converter control, HVDC, smart grid, micro grid, and integration of wind/solar energy.