Dr.Yi

The frequency scan technique has been widely used in both academic and industrial applications to accurately
characterize the external frequency-domain behavior of power systems (or any other systems with linear characteristics). Its
straightforward implementation and ease of use have contributed to its popularity across a wide range of application scenarios. This
presentation introduces the fundamental theory underlying the technique, its typical application scenario and illustrative examples.
In addition, it shares practical experiences and observed phenomena encountered during the development and enhancement of
RTDS-FSAT tool since 2019.

Biography:

Yi Qi joined RTDS since 2018 and is currently the R&D Manager, Power electronics modelling, working under the leadership of
Dr. Yi Zhang. He received his Ph. D degree from University of Manitoba in 2019 under the supervision of Dr. A. M. Gole. His current
work focuses on the research and development of 1) Frequency Scan & Analysis Tools (FSAT); 2) Data center modelling; 3) the
control algorithms for IBR-BESS; as well as 4) Universal Converter Models (UCM).

Dr.Kaiyang

Modern power systems with high penetrations of inverter-based resources exhibit tightly coupled dynamics across multiple
timescales, ranging from fast electromagnetic transients to slower electromechanical responses. These characteristics challenge
conventional simulation approaches, which often struggle to achieve both accuracy and computational efficiency. This seminar
presents a heterogeneous multiscale framework that enables efficient time-domain simulation by adaptively bridging fast and slow

dynamics. The method leverages short bursts of detailed simulations to inform a reduced macro-scale evolution, achieving on-the-
fly model reduction without relying on predefined simplified models. The proposed approach provides a scalable and accurate tool for analyzing the dynamic behavior of inverter-rich power systems.

Biography:

Kaiyang Huang is an incoming Assistant Professor in the Department of Electrical Engineering and Computer Science at South
Dakota State University. He received his Ph.D. in Electrical Engineering from the University of Tennessee, Knoxville, where he was
advised by Dr. Kai Sun. His research focuses on modeling, simulation, and control of multiscale power systems, with an emphasis
on inverter-rich grids. His work develops advanced computational methods for electromagnetic transient (EMT) simulation,
multiscale modeling, and dynamic analysis to improve the accuracy and efficiency of large-scale power system studies.

Prof.Guang

Biography:

Professor Guangya Yang has been conducting research on stability, control, and protection of low-inertia power
systems since 2014. He has been leading the development of real-time hardware-in-the-loop testbeds at DTU. Dr. Yang is the
convenor of IEC 61400-21-5, “Wind Energy Generation Systems – Part 21-5: Configuration, Functional Specification, and Validation
of Hardware-in-the-Loop Test Benches for Wind Power Plants.He regularly delivers industry training programs on offshore wind
power systems, covering topics such as control strategies, design principles, grid code compliance, system stability, protection, and
electromagnetic transient simulation. In this talk, he will present several case studies demonstrating the use of EMT simulation in
low-inertia power systems, and outline a vision for future real-time EMT-based testbeds to support the secure design and validation
of complex energy projects.

Address:Denmark