Abstract:
The presentation will commence by showcasing the PHIL testing of grid forming inverters tuned in 6 different ways to achieve synchronization stability enhancement. The testing took place in ICCS-NTUA’s premises as part of ERIGrid 2.0 Transnational Access (TA) collaborative work between University of Sevilla and ICCS-NTUA. The lessons learned using a voltage-type amplifier will be discussed. Next, our recent work on cyber-security of inverter-dominated microgrids will be presented. Cyber-attacks targeting the power controller of GFM and the synchronization loop of GFL will be discussed, as well as the impact of those attacks on the physical layer, that may cause the disconnection of units or even black out in an islanded system. The experiments using a PHIL testbed will be presented. Lately, ICCS-NTUA research is focused on digital twins as a key technology that can facilitate dynamic observability, real time disturbance analysis and testing of future scenarios that include new critical equipment. In that frame, the use of digital twin for the evaluation of data driven based dynamic security assessment of non-interconnected islands will be presented that developed for the actual system operating in Rhodes, a Greek non-interconnected island.
Alkistis Kontou – ICCS - NTUA