Reasons behind this project

The high penetration of inverter-based resources (IBR) is decreasing the accuracy of traditional methods for system stability. Furthermore, the occurrence of new instability phenomena requires new methods to assess the system stability.

Present strategies are mainly based on extensive detailed EMT simulations, which is time consuming, both in term of data collection and computing time.
Stability indexes or weak area indexes, even though not fully accurate, are necessary to point which situations need deep investigations. Moreover they can be calculated efficiently on a full grid in one single computation. Depending on the type of stability, the index can determine the stability of the grid or designate the area or the devices that are weakening the grid.

Objectives

PSSIx will propose and develop new stability indexes for power systems with increased penetration of inverter-based resources. Such simplified indexes, even though not always accurate, are necessary to identify which situations need deep investigations. Moreover they can be calculated efficiently on a full grid in one single computation. Depending on the type of stability, the index can determine the stability of the grid or designate the area or the devices that are weakening the grid.

Project partners

The project team is currently being defined and the project is open to additional partners.

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