Blar i NTNU Open på forfatter "Piegari, Luigi"
-
A Current Controlled Virtual Synchronous Machine Adapted for Operation under Unbalanced Conditions
Avdiaj, Eros; Suul, Jon Are Wold; D'Arco, Salvatore; Piegari, Luigi (Chapter, 2020)This paper presents a comprehensive evaluation of control strategies for operation of a Virtual Synchronous Machine (VSM) under unbalanced conditions in both grid-connected and islanded mode. The basis for the evaluation ... -
Evaluation of Inertia Emulation Strategies for DC- Voltage-Controlled and Power-Controlled Converter Stations in HVDC Interconnections
Puricelli, Francesco Giacomo; D'Arco, Salvatore; Suul, Jon Are Wold; Piegari, Luigi (Chapter, 2020)This paper presents an evaluation of two control schemes for virtual inertia support from the converter terminals of an HVDC interconnection. A point-to-point interconnection between asynchronous power systems is assumed, ... -
Frequency-Adaptive Energy Control for Grid-Forming MMCs Under Unbalanced Conditions
Avdiaj, Eros; D'Arco, Salvatore; Piegari, Luigi; Suul, Jon Are Wold (Peer reviewed; Journal article, 2023)This paper presents a frequency-adaptive energy control strategy for a Modular Multilevel Converter (MMC) which is suitable for grid-forming operation under unbalanced conditions. The average components of the energy sum ... -
Resynchronization of Islanded Virtual Synchronous Machines by Cascaded Phase and Frequency Controllers Acting on the Internal Power Reference
Giudicepietro, Francesco; D'Arco, Salvatore; Suul, Jon Are Wold; Piegari, Luigi (Chapter, 2020)Virtual Synchronous Machines (VSMs) have the capability to operate in grid connected or in islanded mode in the same way as synchronous machines. Furthermore, VSMs can inherently support seamless transition from grid ... -
A Virtual Synchronous Machine-based Control for Eliminating DC-side Power Oscillations of Three-Phase VSCs under Unbalanced Grid Voltages
Avdiaj, Eros; Suul, Jon Are Wold; D'Arco, Salvatore; Piegari, Luigi (Chapter, 2021)This paper presents a Virtual Synchronous Machine (VSM)-based control method for avoiding dc-side power oscillations in grid connected voltage source converters (VSCs) when operating under under unbalanced conditions. The ...