Design and Simulation of a Novel Modular Converter-Transformer for AC/DC, DC/AC and DC/DC Operations

Francesco Castelli Dezza, Nicola Toscani (), Matteo Benvenuti, Riccardo Tagliaretti, Vincenzo Agnetta, Mattia Amatruda and Samuel De Maria
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Francesco Castelli Dezza: Mechanical Department, Politecnico di Milano, 20156 Milan, Italy
Nicola Toscani: Mechanical Department, Politecnico di Milano, 20156 Milan, Italy
Matteo Benvenuti: Mechanical Department, Politecnico di Milano, 20156 Milan, Italy
Riccardo Tagliaretti: ePEBB s , 20122 Milan, Italy
Vincenzo Agnetta: Terna, 00156 Rome, Italy
Mattia Amatruda: Terna, 00156 Rome, Italy
Samuel De Maria: Terna, 00156 Rome, Italy

Energies, 2024, vol. 17, issue 23, 1-36

Abstract: This manuscript describes the research and the development of a novel family of modular AC/DC, DC/AC and DC/DC converters for high-voltage interconnections between AC and DC lines or between two DC lines. Such devices are bidirectional and they integrate a three-phase power transformer. The relationship existing between AC and DC voltages in each module for rectifier and inverter operations is analogous to the one set in single-phase thyristor bridges. Due to the novelty of this topic, a low-voltage, low-power prototype was sized to make a first validation of its predicted behavior. This converter should realize all the operating modes allowed by the new family of devices, namely, AC/DC, DC/AC and DC/DC conversions. Its rated phase voltage is 230 V rms and it should be able to carry at least 1 kW. Thus, a switching model of the device was realized first. The simulated behavior of this prototype is deeply discussed in this paper during steady-state, transient and DC-fault operations.

Keywords: modular converter; multilevel converter; HVDC; converter transformer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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