Abstract
This paper investigates the impacts of large synchronverters (SV) integration on transient stability and strength of electric power systems. Large Synchronverters account for large amounts of electrical energy injected into the power grid through power converters, as in PV and off shore wind power sources. Potential stability problems may occur when large power converters are connected to weak power systems (PES). An SV is an inverter that mimics a synchronous generator (SG). Methodologically, the SV performances are contrasted to the standard SG of like parameters in terms of system strength and transient stability. These criteria are quantified respectively by the Short-circuit Ratio (SCR) and the critical clearing time (CCT). The penetration ratio of SV generation is increased to the detriment of SG power. Due to their current controllers’ limitations, the SV participation in short-circuit currents is reduced to nominal values, diminishing the network strength. Although SVs have similar properties as SGs and have variable virtual inertia, this study reveals many limitations that must be taken into account when planning their integration into the network. In opposition, SGs enhance the transient stability margin even in weaker systems. Hence, strong buses in a PES indicated by large SCR and CCT feature larger amounts of SG power compared to the power generated by SVs.
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Aouini, R., Ben Kilani, K., Elleuch, M., TRAN, Q.T. (2021). Large Synchronverter Integration in Power Electrical System: Impacts on SCR and CCT. In: Bououden, S., Chadli, M., Ziani, S., Zelinka, I. (eds) Proceedings of the 4th International Conference on Electrical Engineering and Control Applications. ICEECA 2019. Lecture Notes in Electrical Engineering, vol 682. Springer, Singapore. https://doi.org/10.1007/978-981-15-6403-1_16
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DOI: https://doi.org/10.1007/978-981-15-6403-1_16
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