Publications de Andrea Cervone

Second Harmonic Induced Resonant Modes of Fixed-Frequency Operated LLC Converters

Drazen Dujic, Tianyu Wei, Andrea Cervone

The fixed-frequency operated LLC converters can provide a fixed voltage gain with galvanic isolation between the input and output. However, when applied in two-stage AC/DC converters, the equivalent current that flows through the LLC converter, which corre ...

Institute of Electrical and Electronics Engineers (IEEE)2025

Active Filtering of Second-Order Harmonic in Two-Stage Single-Phase AC/DC Converters with Frequency Modulated Series-Resonant Converters

Drazen Dujic, Andrea Cervone

Series Resonant Converters allow an efficient, galvanically isolated, and load-independent DC/DC conversion, and can be used as isolation DC/DC units in two-stage single-phase AC/DC converters. However, in such systems, the single-phase Active Front End un ...

Institute of Electrical and Electronics Engineers (IEEE)2025

Performance Evaluation of Isolated DC/DC Converters in Modularized Bridge Rectifier Solid-State Transformer

Drazen Dujic, Andrea Cervone

Modularized Bridge Rectifier (mBR) is a promising architecture of single-stage solid-state transformer. Without the presence of AC/DC active rectifier, the system performance solely depends on the control and optimization of isolated DC/DC converters. This ...

IEEE2025

Novel Modulation with Flexible Power Distribution for Single-Phase Dual-Port DC-AC Converters

Andrea Cervone

Dual-port dc-ac converters utilizing the Neutral-Point-Clamped (NPC) multilevel topology are increasingly considered for the compact integration of multiple sources and loads in various applications. NPC-based dual-port converters (NPCDPC) allow the interc ...

Institute of Electrical and Electronics Engineers Inc.2024

Active Power Decoupling for Single-Phase Input-Series-Output-Parallel Solid-State Transformers

Drazen Dujic, Tianyu Wei, Andrea Cervone

Solid-state transformers with input-series outputparallel structures are being considered for a variety of applications requiring MVAC to LVDC conversion. Due to the singlephase AC/DC conversion at the input side, all floating cells of the solid-state tran ...

2024

An Asymmetric Perturbation Signal for Enhanced Perturbation Injection Capabilities of a Grid-Connected Converter

Drazen Dujic, Jules Christian Georges Macé, Andrea Cervone

Impedance estimation is an important tool for grid- converter interaction evaluation. Using existing grid-connected converters for perturbation injection enables grid impedance estimation during operation without additional hardware (namely dedicated pertu ...

2024

Stability Analysis of Second-Order Harmonic Active Filters for Input-Series/Output- Parallel Solid State Transformers

Drazen Dujic, Tianyu Wei, Andrea Cervone

Solid-State Transformers with Input-Series/Output- Parallel configuration offer a convenient solution for AC/DC power conversion, thanks to their modularity, scalability and flexibility. However, as known, they are affected by a second-order harmonic rippl ...

2024

Stability Analysis of Input-Series/Output-Parallel Solid-State Transformers Equipped with Second-Order Harmonic Active Power Filters

Drazen Dujic, Tianyu Wei, Andrea Cervone

Solid-State Transformers with Input-Series/Output-Parallel configuration offer a convenient solution for AC/DC conversion due to their scalability and modularity. In this configuration, each module experiences a second-order harmonic ripple caused by local ...

2024

Modularized Diode Rectifiers: A New Family of Solid-State Transformers

Drazen Dujic, Andrea Cervone

Solid-State Transformers are conventionally based on a multi-stage architecture, with an input and/or an output AC/DC converter (for interfacing with the AC grid and/or the load), and with an isolated DC/DC conversion stage (to provide insulation and volta ...

Institute of Electrical and Electronics Engineers (IEEE)2024

Unlocking the Potential of the Modularized Bridge Rectifier Solid-State Transformer

Drazen Dujic, Andrea Cervone

The Modularized Bridge Rectifier is a promising architecture for Solid State Transformers in Medium Voltage AC to Low Voltage DC applications, thanks to the scalability and modularity obtained by integrating multiple galvanically isolated conversion stages ...

2024

Enhancing the Perturbation Injection Capabilities of Grid-Connected Converters with Asymmetric Signals

Drazen Dujic, Jules Christian Georges Macé, Andrea Cervone

Impedance identification is an important tool for the evaluation of grid-converter interactions, and it is based on the injection of a controlled small signal perturbation and in the analysis of the corresponding system response. Using already installed gr ...

2024

Impact of the Distributed Current Controller on the Dynamic Performance of the Modular Multilevel Converter

Drazen Dujic, Max Dupont, Andrea Cervone

The control of a modular multilevel converter can be achieved in various ways. Traditionally, upper-layer energy controllers and middle-layer current controllers are centrally implemented. In some hardware realizations, the submodules also include a local ...

Institute of Electrical and Electronics Engineers Inc.2024

Analysis of a DC Data Center Power Supply with Series-Connected Active and Passive Rectifiers

Drazen Dujic, Andrea Cervone

2024

Optimization of DC-Link Capacitance for Single-Phase ISOP SST Considering the Second Harmonic Pulsating Power in LLC Converter

Drazen Dujic, Tianyu Wei, Andrea Cervone

2024

Ripple Voltage and Loss Reduction of Single-Phase ISOP SST by Eliminating the Second Harmonic Current in LLC Converters

Drazen Dujic, Tianyu Wei, Andrea Cervone

In two-stage solid-state transformers with input-series output-parallel structure, the LLC converter operating at a fixed switching frequency is a common choice for the isolated DC/DC conversion stage because it can provide a high efficiency and a fixed vo ...

2024

Dynamics analysis for DC transformers integration in hybrid AC‐DC power distribution networks

Drazen Dujic, Max Dupont, Jules Christian Georges Macé, Renan Pillon Barcelos, Andrea Cervone

In AC/DC power distributions networks, power converters are interfacing buses to ensure DC voltage regulation and power distribution. Active front ends are used between AC and DC buses and two typical control schemes that can be implemented are voltage reg ...

2023

Learning With Your PETS

Drazen Dujic, Max Dupont, Jules Christian Georges Macé, Renan Pillon Barcelos, Andrea Cervone

Recently, we published an article [1] presenting how the Power Electronics course at the bachelor level is organized by the Power Electronics Laboratory and taught at Ecole Polytechnique Fédérale de Lausanne, EPFL, Switzerland. For those avid readers who m ...

2023

DC Transformer Impact on Voltage Dynamics in Hybrid AC-DC Power Distribution Networks

Drazen Dujic, Max Dupont, Jules Christian Georges Macé, Renan Pillon Barcelos, Andrea Cervone

AC/DC power distribution networks use various types of power converters to interconnect their buses, active front ends between AC and DC buses, and DC transformers between DC buses. Different active front end control methods, like voltage or power regulati ...

VDE Verlag2023

Coupling Dynamics of Second-Order Harmonic Active Filters in Single-Phase Input- Series/Output-Parallel AC-DC Converters

Drazen Dujic, Tianyu Wei, Andrea Cervone

VDE Verlag2023

Fourier-Based Harmonic Control of Plug-and-Play Active Filters for Input-Series/Output-Parallel Solid-State Transformers

Drazen Dujic, Tianyu Wei, Andrea Cervone

2023