Sponsor: Orange County Section Jt. Chapter, PE31/IA34, Orange County Section Chapter,PEL35
Speaker: Sibin Mohan,

Meeting Date: 21 Nov 2024
Time: 05:00 PM to 06:15 PM
Cost:
Location: UCI Applied Innovation Center
Reservations: IEEE
Summary:
The generation of power system is transitioning from conventional synchronous generators with voltage source behavior to power converter interfaced renewables. Power converters typically excel a current source behavior, which fundamentally changes the dynamics of the power systems and resulting in stability challenges. The new type of control that can enable the converters to operate in a voltage source behavior, referring to as grid forming control (GFC) can mimic behavior of a synchronous generator and can aid in system stability. However, the reported control loops of the GFCs do not have a unified structure across various vendors. This means, different control structures of GFC would lead to different pros and cons in different operational conditions based on their underlining control realization principles, the number of parameters and their setting rooms. Therefore, the stability augmenting voltage source behavior cannot be considered as equal as for all the reported GFC realizations. This paper provides a critical review and discussion on the impact of inner control loop realizations of the GFC’s reported in the literature on their stability during steady state and large disturbances. The analysis revealed that inner loops could negatively impact the voltage source behavior of a GFC due to the complex control structure and the associated challenges of parameter tuning.

Bio: Sibin Mohan, a Ph.D. degree holder in Electrical engineering, has over eight years of experience in power system modeling and studies. He is currently working as a Power system Network studies consultant at Siemens Energy. Prior to this, he worked as a Engineering Manager, at EPE, and as a senior consultant at Quanta Technology. With extensive experience on modeling and studies for HVDC, Inverter Based Generators (IBR) and Large Loads, he has supported clients across multiple ISOs in North America, contributed to the development of Renewable and Large Load projects. He has a strong background in performing dynamic and electromagnetic transient (EMT) modeling, and studies for the integration of Inverter Based Resources (IBR), and HVDC projects. He has published 6 IEEE transaction papers, and more than 15 international conference papers. Actively engaged in the professional community, he is a dedicated member of various IEEE and NERC working groups, focusing on Inverter-Based Resources and large load modeling. Furthermore, he is also volunteering as a reviewer for select IEEE journals and serves as a mirror committee member for Standards Council of Canada (SCC).