Reasons behind this project:
In the last few years, a growing concern has emerged around the world about possible adverse interactions between existing power electronics interfaced resources. This has been further reinforced by real events leading to a loss of production or to urgent remedial actions by operators. Even if no large-scale issues or blackout events can directly be imputed to this phenomenon, it has attracted a large attention in the community and several transmission system operators have taken investment decisions to protect their grid against these phenomena.
In parallel, a large research effort has been done to try to find representative indicators that would help screening risky situations and identifying weak areas in the grid. Despite the drawbacks of these simple indicators, they all lead to similar trends and results in most of the power systems worldwide: there is a high increase in the risk of adverse interactions between power electronics interfaced resources. Considering the large number of potential
dangerous situations, it appears undoable and unreasonable to invest in a sufficient number of assets (synchronous compensator, static compensator) to avoid these situations. The natural question arising from this observation is: Could such risky situations degenerate into system-wide collapse? Under what conditions?
It is therefore crucial to understand the consequences of these interactions and their impact from a system-wide perspective. A key question for system operators is the overall effect of these interactions: if they remain localized, it may suffice to consider only the resulting effects (loss of a portion of the grid, loss of a few generating units), rather than the interactions themselves. Otherwise, it becomes necessary to conduct simulations with sufficient accuracy to represent the phenomenon in both operational and planning studies while ensuring a good level of performances and robustness.
