The objective of this project team was was to identify stability issues related to major grids reaching high levels of IBR penetration. The effort was centered on stability issues that are substantively altered or aggravated by the differences between IBR and synchronous resources. The project team investigated oscillations that have been observed or are anticipated in grids with IBR, and identified gaps in our understanding that should be addressed in future R&D efforts.
Approach
There are broad systemic stability issues, such as small signal stability, first swing transient stability and voltage stability. The PT will start with consideration of the latest IEEE stability definitions, but not be unduly constrained by them. The participants will refine the current understanding with respect to high IBR systems. The PT will focus on the stability issues that are most impacted by high levels of IBR and of highest importance to the industry and FSOs.
Efforts will include investigation of stability margins, metrics and indicators of approach to stability limits. The G-PST Pillar 1 Tool Inventory will be used as a starting point in the identification of tools for analysis, root cause assessment, and planning functions.
Deliverables
Deliverable will include a report summarizing the current experience, state-of-the-art understanding and gaps, and synopsis of available tools and techniques as a basis for future R&D. A Policy Brief summarizing the results for policy makers will be prepared, and a webinar summarizing the results for a technical audience will be presented.
Completed Work:
Diagnosis and Mitigation of Observed Oscillations in IBR-Dominant Power Systems
This practical guide is a starting point for people who encounter oscillatory behavior, a sort of field guide or diagnostician’s assistant.