On 3rd June 2025 Prof. Ing. John Licari represented TenSyGrid at the CETPartnership stakeholder event at Malta, where he delivered an insightful presentation that captured the audience’s attention. He discussed the stability analysis tools, highlighting the features of Phasor-Domain Transients (PDT) simulations and Electromagnetic Transients (EMT) simulations.
Prof. Licari emphasized the importance of understanding the limitations of these tools, particularly in the context of inverter-based resources. He pointed out that PDT models may fail to reveal potential control instability, leading to results that could produce inaccurate conclusions. One of the specific objectives of the #TenSyGrid project is to develop a modelling framework for power systems with a high penetration of power electronic devices, aimed at accurately capturing the relevant nonlinear dynamics.
During the event, Prof. Licari shared preliminary results comparing a multilinear Phase-Locked Loop (PLL) model against a nonlinear trigonometric-based counterpart. He described a simulation model involving a converter connected to an equivalent grid representation through a filter and a line section. An induced unstable operation condition was forced during the simulation, and remarkably, the multilinear model was able to depict the same behaviour as the nonlinear model.
The presentation sparked great interest among attendees, fostering engaging discussions about the future of stability analysis in power systems.
Picture Courtesy for this and featured image: Prof. John Licari
