Marcelo A. Perez

Marcelo A. Perez

Universidad Técnica Federico Santa María

H-index: 41

Latin America-Chile

About Marcelo A. Perez

Marcelo A. Perez, With an exceptional h-index of 41 and a recent h-index of 29 (since 2020), a distinguished researcher at Universidad Técnica Federico Santa María, specializes in the field of Power electronics, multilevel converters, smart grids.

His recent articles reflect a diverse array of research interests and contributions to the field:

Common-Mode-Voltage Regulation of Modular Multilevel Converters Through Model Predictive Control

Operation Assessment of a Hybrid Distribution Transformer Compensating for Voltage and Power Factor Using Predictive Control

Stability Analysis of a Hybrid Distribution Transformer with a Series/Parallel Converter Connected to the Primary/Secondary Side

Circulating Active Power Flow Analysis in a Hybrid Transformer With the Series Converter Connected to the Primary Side

State-feedback control of a hybrid distribution transformer for power quality improvement of a distribution grid

Circulating Active Power Flow and DC-Link Voltage Ripple in Hybrid Transformers

A Predictive Control Scheme for a Single-Phase Grid-Supporting Quasi-Z-Source Inverter and Its Integration With a Frequency Support Strategy

An Improved Indirect Pulse-Width Modulation Technique for Modular Multilevel Converters

Marcelo A. Perez Information

University

Universidad Técnica Federico Santa María

Position

___

Citations(all)

16737

Citations(since 2020)

7568

Cited By

12390

hIndex(all)

41

hIndex(since 2020)

29

i10Index(all)

92

i10Index(since 2020)

67

Email

University Profile Page

Universidad Técnica Federico Santa María

Marcelo A. Perez Skills & Research Interests

Power electronics

multilevel converters

smart grids

Top articles of Marcelo A. Perez

Common-Mode-Voltage Regulation of Modular Multilevel Converters Through Model Predictive Control

Authors

Jiapeng Yin,NingYi Dai,Jose I Leon,Marcelo A Perez,Sergio Vazquez,Leopoldo G Franquelo

Journal

IEEE Transactions on Power Electronics

Published Date

2024/3/14

Modular multilevel converters (MMCs) have emerged as an attractive converter topology for renewable energy integration systems. A smooth operation of an MMC depends on the proper regulation of multiple control variables, e.g., phase current, circulating current, capacitor voltage, etc. The model predictive control (MPC) is an excellent candidate for such a scenario since different control objectives can be simultaneously handled in a unified cost function. Although extensive research has been conducted in the literature, a computationally efficient MPC implementation capable of regulating the common-mode voltage (CMV) of the ac-side neutral point of an MMC as a control target has not been properly investigated. This article proposes such an MPC strategy that can flexibly regulate the CMV by incorporating the CMV tracking error into the cost function. The biggest challenge is the dramatically increased number …

Operation Assessment of a Hybrid Distribution Transformer Compensating for Voltage and Power Factor Using Predictive Control

Authors

Esteban I Marciel,Carlos R Baier,Roberto O Ramírez,Carlos A Muñoz,Marcelo A Pérez,Mauricio Arevalo

Journal

Mathematics

Published Date

2024/3/5

Hybrid Distribution Transformers (HDTs) offer a compelling alternative to traditional low-frequency transformers (LFTs), providing auxiliary services in addition to standard functionalities. By integrating LFTs with power converters, HDTs enhance the operational capabilities of the system. The specific configuration in which converters are connected to the transformer allows for the provision of multiple services. This can not only prevent network failures but also extend the lifespan of its components, an outcome that is highly desirable in a distribution grid. This article discusses an HDT developed to mitigate voltage fluctuations in the grid and to decrease the reactive power drawn from the secondary side of traditional LFTs. A finite-control-set model predictive control (FCS-MPC), in conjunction with linear controllers, is utilized for the effective management of the HDT converters. Two separate control loops are established to regulate voltage and reactive power on the secondary side of the transformer. Results from Hardware-in-the-Loop (HIL) testing affirm the proficiency of HDT in reducing grid voltage variations by 15% and in cutting reactive power consumption by up to 94%. The adopted control strategy and topology are demonstrated to be effective in stabilizing voltage and reactive power fluctuations while concurrently facilitating the charging of the converters’ DC link directly from the grid.

Stability Analysis of a Hybrid Distribution Transformer with a Series/Parallel Converter Connected to the Primary/Secondary Side

Authors

Alvaro Carreno,Mariusz Malinowski,Marcelo A Perez

Published Date

2024/1/8

Hybrid Distribution Transformers (HDTs) have been proposed as a promising solution to power quality issues in distribution networks. HDTs combine a classical Low-Frequency Transformer (LFT) with a series and parallel connected power converters. In this paper, the stability of HDT is analyzed using their equivalent impedance/admittance models. This paper considers that the power converters are decoupled by the DC-Link, which simplifies the analysis. The stability is assessed using the Generalized Nyquist Criteria (GNC) and the singular value decomposition. The results show that the HDT is stable when each power converter is designed with proper stability margins and due to the power converters partial power operation.

Circulating Active Power Flow Analysis in a Hybrid Transformer With the Series Converter Connected to the Primary Side

Authors

Alvaro Carreno,Mariusz Malinowski,Marcelo A Perez,Carlos R Baier

Journal

IEEE Transactions on Industrial Electronics

Published Date

2024/1/8

Hybrid distribution transformers (HDTs) have been proposed as an alternative to conventional transformers (low-frequency transformers) and solid-state transformers, combining the reliability of low-frequency transformers (LFTs) and the controllability of power converters. Although there are several HDT configurations, those that connect the series converter on the primary side and the parallel converter on the secondary side can improve the operating conditions of the main LFT. Nevertheless, during voltage sag compensation, there is a circulating active power flow (CAPF) between the main LFT and the power converters. This CAPF increases the total power circulating through the LFT, which finally affects the overall efficiency of the HDT. This article presents an analysis of the different operating conditions of the HDT, their relationship with the CAPF, and their impact on the efficiency of the HDT. Two methods to …

State-feedback control of a hybrid distribution transformer for power quality improvement of a distribution grid

Authors

Alvaro Carreno,Marcelo Perez,Mariusz Malinowski

Journal

IEEE Transactions on Industrial Electronics

Published Date

2023/4/3

A hybrid distribution transformer (HDT) combines a power converter and a conventional low-frequency transformer (LFT) in a single device. The most recurrent configuration consists of a shunt converter fed by the auxiliary winding (AW) of the LFT and a series converter connected to the low-voltage grid. Nonetheless, load harmonics circulate through the power converter and LFT, affecting their lifetime. In this work, an HDT composed of a series converter connected to the primary side through coupling transformers and a shunt converter directly connected to the secondary side is presented. The HDT model and discrete-time state-feedback control are presented. The results show that the HDT can improve the power quality of the grid, focused on extending the LFT lifetime.

Circulating Active Power Flow and DC-Link Voltage Ripple in Hybrid Transformers

Authors

Alvaro Carreno,Mariusz Malinowski,Marcelo A Perez

Published Date

2023/10/16

Hybrid Distribution Transformers (HDTs) are a promising solution to power quality problems on distribution networks, allowing for precise voltage and current regulation. HDTs that connect the series converter on the primary side are subject to a Circulating Active Power Flow (CAPF) between the Low-Frequency Transformer (LFT) and the power converters that appear when compensating for voltage disturbances. This paper analyzes the cause of the CAPF and its behavior, considering varying grid conditions and the impact of the CAPF on the DC-Link ripple.

A Predictive Control Scheme for a Single-Phase Grid-Supporting Quasi-Z-Source Inverter and Its Integration With a Frequency Support Strategy

Authors

Carlos R Baier,Felipe A Villarroel,Miguel A Torres,Marcelo A Pérez,Jesús C Hernández,Eduardo E Espinosa

Journal

IEEE Access

Published Date

2023/1/12

Small grid-connected inverters are not friendly to the electrical grid, in the sense they do not take any action to support the grid when contingency events occur. For example, because of their relatively low power capacity, small grid-connected inverters are not designed to provide dynamic frequency support to the grid. On the other hand, it is well known that microgrids and weak grids including distributed generation would benefit significantly if all of the grid-connected converters could support and help against grid frequency disturbances. Within the family of small grid-connected converters, single-phase quasi-Z-source inverters (QZSI) have become an attractive topology, because they represent a reliable and economical alternative, and can be very efficient in applications that demand small or medium powers. However, a major disadvantage is that the control strategy must manage both direct current and …

An Improved Indirect Pulse-Width Modulation Technique for Modular Multilevel Converters

Authors

Jiapeng Yin,NingYi Dai,Sergio Vazquez,Abraham Marquez,Jose I Leon,Marcelo A Perez,Leopoldo G Franquelo

Journal

IEEE Transactions on Power Electronics

Published Date

2023/10/3

For a modular multilevel converter (MMC) operating in the medium-voltage range, carrier-based pulsewidth modulation (PWM) methods are good options for modulating the converter, as harmonic contents of the phase voltage/current can be centered around the carrier frequency and/or its multiples. However, in the relevant literature, arm voltage references are mostly normalized by the submodule (SM) capacitor voltage reference, leading to the so-called direct modulation, while the indirect modulation considering the capacitor voltage ripples receives much less attention. This article investigates the indirect modulation of MMCs, focusing on a specific PWM method where only two SMs per phase operate in PWM mode in each control period. It is found that the direct PWM (DiPWM) generates phase voltages/currents that contain high-amplitude low-order harmonics, while the indirect PWM (IndiPWM) presents well …

Deadbeat voltage control for a grid-forming power converter with LCL filter

Authors

Javier Samanes Pascual,Leyre Rosado Galparsoro,Eugenio Gubía Villabona,Jesús López Taberna,Marcelo A Pérez

Journal

IEEE transactions on industry applications, 59 (2), 2023

Published Date

2023

Grid-forming power converters are controlled as voltage sources to regulate the grid voltage and frequency. These converters can increase power system strength if they impose a voltage waveform resilient to grid transients. For this reason, in this paper, we propose a deadbeat control strategy of the capacitor voltage for high power converters with LCL filter. To damp the LCL resonant poles, an active damping strategy is developed, based on a modification of the deadbeat control law. With this purpose, a notch filter is applied to the electrical variables allowing to emulate different damping resistances for the fundamental component and the harmonics. As a result, the active damping does not introduce tracking errors of the fundamental frequency component, while it provides damping to the filter resonance. The proposed strategy does not require knowledge of the grid impedance, an interesting feature in grid-connected power converters because the grid impedance is generally unknown. Experimental results validate the proposed strategy.

Eccentric and concentric contraction of multifidus lumborum and longissimus muscles during flexion–relaxation test using discrete wavelet transform

Authors

Rony Silvestre,Juan Carlos Letelier,Marcelo Perez,Manuela Cifré,Carlos De la Fuente

Journal

Sport Sciences for Health

Published Date

2023/9

PurposeMuscle activation can reflect the stability of the lumbar spine based on the electrical features and kinematics during a dynamic test. However, there is a lack of knowledge of the activation of paravertebral muscles i.e., during the flexion–relaxation test. Hence, we determine the band frequency differences between eccentric (ECC) and concentric (CON) contraction during the flexion–relaxation test in healthy untrained participants without lumbar pain, both multifidus lumborum and longissimus muscles.Methods40 healthy participants (aged 30.6 ± 6.9 years) were recruited. Kinematic and surface electromyography were collected to compare the ECC and CON spectral characteristics of both multifidus lumborum and longissimus. The bursts were transformed using a discrete wavelet transform (Daubechies). The band frequencies were compared through mean comparison test with alpha set to 5%.ResultsBoth …

Flux Compensation in a Hybrid Transformer with the Series Converter Connected on the Primary-Side

Authors

Alvaro Carreno,Marcelo Perez,Mariusz Malinowski

Published Date

2023/6/14

Hybrid distribution transformers (HDTs) integrate a power converter with a conventional transformer, improving power quality and providing ancillary services. When the series converter is connected to the primary side, it is possible to use this converter to regulate the load voltage. Nonetheless, if there is no proper care in how the voltage is injected, there is a risk of producing a DC offset on the flux of the main Low-Frequency Transformer (LFT). In that case, the transformer can generate inrush currents. The latter can damage equipment and trigger security systems. This work presents an HDT connected in series to the medium-voltage grid through Coupling Transformers (CTs). The series converter is used to regulate the flux of the main LFT to its rated value and indirectly regulate the load voltage. A flux regulator and a simple flux estimator are presented. Results show that the series converter can successfully …

Power-Converter-Enabled Microbrewery

Authors

Nicolas Muller,Francisco Navarrete,Lorenzo Reyes-Chamorro,Felipe Valencia Arroyave,José M Villatoro,Marcelo Pérez,Patrick Wheeler

Published Date

2023/12/5

The climate crisis has made cleaner industry processes a necessity. The beer industry relies almost exclusively on fossil fuels to handle their most energy-intensive processes: mashing and boiling. Moreover, most micro breweries use manual or hysteresis control to regulate temperature during this stages, thermally stressing the malt, thus reducing its efficiency. In this context electric breweries, based on solid state relay (SSR), have been proposed to eliminate fossil fuel dependence. However, the direct connection of the heating element to the AC grid, does not solve the malt's thermal stress problem. Moreover, this solution is limited in terms of scalabillity, due to the harmonic content imposed in the grid's current by the hysteresis control of the SSR. This paper proposes a cauer-based thermal model for mashing and boiling during beer fabrication and a power converter configuration for a micro-brewery, where the …

Multi-mode master-slave control approach for more modular and reconfigurable hybrid microgrids

Authors

Diego S D’antonio,Oswaldo López-Santos,Alex Navas-Fonseca,Freddy Flores-Bahamonde,Marcelo A Pérez

Journal

IEEE Access

Published Date

2023/5/26

The increasing demand for energy and the high penetration of distributed energy resources require the evolution of current electrical systems toward smarter and more reliable electric grids. In this regard, microgrids (MG) play a vital role in integrating distributed energy resources (DER), loads, and storage systems. However, microgrid architectures lack versatility and flexibility in terms of control, limiting their expansion. This paper presents a multi-mode master-slave control approach to increase the flexibility of DC-coupled hybrid microgrids. The proposed control scheme allows optimal coordination of the power units connected to each bus. Coordination among buses is also achieved through interlinking and interfacing converters; thus, ensuring the reliable operation of the microgrid. Moreover, this approach considers the possible expansion of the capacity of the MG, providing more degrees of freedom for …

Active Loss Balancing Scheme with Decision Chart for 3L-ANPC-VSCs with IGBTs for Bidirectional Energy Flow Operation

Authors

Alan H Wilson-Veas,Alejandro Peralta,Marcelo A Perez

Published Date

2023/11/26

An active loss balancing (ALB) scheme for the three-level active neutral point clamped voltage source converter (3L-ANPC-VSC) with insulated gate bipolar transistors (IGBTs) is presented in this work. This scheme is based on a decision chart which selects one of the four redundant zero states in terms of the estimated junction temperatures of the power semiconductors, which allows to actively select the most suited state in terms of losses. The decision chart is simplified by using a temperature multiplexer which defines the temperatures to be compared in terms of the voltage and current sign, and two decision charts were compared, one of them based on previous works, and the other one as an improvement. The simulation results show that, in generation operation (voltage and currents in counterphase), the improved proposal has a better performance in terms of maximum junction temperatures, while in motor …

Stochastic resonance exploration in current-driven reram devices

Authors

Albert Cirera,Ioannis Vourkas,Antonio Rubio,Marcelo Perez

Published Date

2022/7/4

Advances in emerging resistive random-access memory (ReRAM) technology show promise for its use in future computing systems, enabling neuromorphic and memory-centric computing architectures. However, one aspect that holds back the widespread practical use of ReRAM is the behavioral variability of resistive switching devices. In this context, a radically new path towards ReRAM-based electronics concerns the exploitation of noise and the Stochastic Resonance (SR) phenomenon as a mechanism to mitigate the impact of variability. While SR has been already demonstrated in ReRAM devices and its potential impact has been analyzed for memory applications, related works have only focused on voltage input signals. In this work we present preliminary results concerning the exploration of SR in current-driven ReRAM devices, commercially available by Knowm Inc. Our results indicate that additive noise …

Analysis of Bidirectional Wireless Power Transfer for EV applications

Authors

Ivan Choque,Marcelo A Perez,Johan I Guzman

Published Date

2022/10/17

The wireless power transfer technology for electric vehicles charging has been largely improved during the last years in terms of system configurations, coil design, and control schemes with the aim to achieve higher power, higher efficiency, and longer transmission distance. The compensation stage is usually designed considering sinusoidal voltages and currents. However, the full-bridge converters used to generate the controlled voltage generate a square waveform, requiring design adjustments, reducing the efficiency of the compensation, and impacting the control performance. In this paper, a design guideline for the compensation stage and the evaluation of the performance of the wireless power sources system using power converters instead of sinusoidal sources is given.

El mercado de transporte carretero de cargas en Uruguay

Authors

Pablo Rosselli,Florencia Carriquiry,Marcelo Pérez,Diego Varela,Andrés Pereyra

Published Date

2022/7

Este trabajo presenta un análisis exhaustivo del mercado del transporte de carga por carretera en Uruguay. El mercado está compuesto por un gran número de empresas (aproximadamente 2400), que dan empleo directo a más de 12 000 personas. Con una facturación total anual superior a los USD 1000 millones, la industria presenta un alto grado de competencia entre empresas, que principalmente prestan servicios con baja diferenciación. Por lo tanto, la competencia se basa en gran medida en los precios. No es sorprendente que para las empresas más grandes (sobre las cuales la información está disponible públicamente), la rentabilidad en la industria esté en línea con la observada para la economía en su conjunto. La informalidad (evasión de impuestos y de aportes a la seguridad social) en la industria se ha estimado en alrededor de USD 120 millones anuales, concentrados en pequeñas y medianas empresas. Las políticas públicas para la industria deben centrarse en promover la inversión y las ganancias de productividad en las empresas más pequeñas y en disminuir las externalidades negativas, como los estándares de seguridad y la reducción de emisiones.

A predictive shortest-horizon voltage control algorithm for non-minimum phase three-phase rectifiers

Authors

Felipe A Villarroel,José R Espinoza,Marcelo A Pérez,Carlos R Baier,Jaime A Rohten,Roberto O Ramírez,Esteban S Pulido,José J Silva

Journal

IEEE Access

Published Date

2022/10/6

Three-phase active front end rectifiers are a widely used power topology in applications such as renewable energy interfaces and motor drives, among many others. Its control is usually performed by a cascade combination of linear controllers which must be properly tuned for correct operation, and which depend on the operating point and system parameters. These family of controllers place inherent limits on the system dynamic response. On the other hand, the predictive control approach has been proposed as an alternative technique for these converters due to its fast dynamic response, simple concept, flexibility, multiple objective capability, among other desirable properties. In the case of power converter applications, short prediction horizons are usually used due to computational limitations. However, when short horizons are considered, the non-minimum phase characteristic of the rectifier voltage response …

Unlocking the hidden capacity of the electrical grid through smart transformer and smart transmission

Authors

Marco Liserre,Marcelo A Perez,Marius Langwasser,Christian A Rojas,Ziqi Zhou

Published Date

2022/3/21

Power systems are experiencing a rapid and dramatic transformation driven by the massive integration of nondispatchable renewable energy sources, such as wind and solar, and highly variable loads, such as electric vehicles and air conditioning. This challenges existing grid assets, eventually leading to updating them, which, in turn, increases significantly the costs of sustainable technologies. Power electronics is a pivotal technology for electrical power processing for renewable energies and sustainable transportation. By means of “smart” functionalities, power electronics converters already embedded in such applications can also contribute to guaranteeing the overall system’s stable operation. Anyway, this cooperative contribution from distributed devices may be not enough leading to the need for the voltage transformation and power transmission of “system-level” power electronics solutions. In the case of …

Stability Analysis of Two Power Converters Control Algorithms Connected to Micro-Grids with Wide Frequency Variation

Authors

Jaime Rohten,Felipe Villarroel,Esteban Pulido,Javier Muñoz,José Silva,Marcelo Perez

Journal

Sensors

Published Date

2022/9/19

Distributed power generation, micro-grids, and networks working in islanding mode have strong deviations in voltage quantities. These deviations can be divided into amplitude and frequency. Amplitude deviations are well-known and studied, as they are common in small and big grids. However, deviations on the ac mains frequency have not been widely studied. The literature shows control schemes capable of bearing these variations, but no systematic analysis has been performed to ensure stability. As the majority of power converters are designed for big grids, their analysis and design neglect frequency disturbances, therefore those devices allow a very small frequency operating window. For instance, in power converters that need to be synchronized to the grid, the standard deviation does not go beyond 0.5 Hz, and for grid-tied inverters it does not go beyond 1 Hz, whereas variations of around 8 Hz can be expected in micro-grids. This work presents a comprehensive analysis of the control system’s stability, where two different control schemes for a back-to-back static converter topology are implemented and studied under a wide variable grid frequency. Because the behavior of power converters is nonlinear and coupled, dynamic and static decouplers are usually introduced in the controller, being a key element on the scheme according to the findings. The results show that using just a static decoupler does not guarantee stability under frequency variations; meanwhile, when a dynamic decoupler is used, the operating window can be greatly extended. The procedure shown in this paper can also be extended to other control algorithms …

See List of Professors in Marcelo A. Perez University(Universidad Técnica Federico Santa María)

Marcelo A. Perez FAQs

What is Marcelo A. Perez's h-index at Universidad Técnica Federico Santa María?

The h-index of Marcelo A. Perez has been 29 since 2020 and 41 in total.

What are Marcelo A. Perez's top articles?

The articles with the titles of

Common-Mode-Voltage Regulation of Modular Multilevel Converters Through Model Predictive Control

Operation Assessment of a Hybrid Distribution Transformer Compensating for Voltage and Power Factor Using Predictive Control

Stability Analysis of a Hybrid Distribution Transformer with a Series/Parallel Converter Connected to the Primary/Secondary Side

Circulating Active Power Flow Analysis in a Hybrid Transformer With the Series Converter Connected to the Primary Side

State-feedback control of a hybrid distribution transformer for power quality improvement of a distribution grid

Circulating Active Power Flow and DC-Link Voltage Ripple in Hybrid Transformers

A Predictive Control Scheme for a Single-Phase Grid-Supporting Quasi-Z-Source Inverter and Its Integration With a Frequency Support Strategy

An Improved Indirect Pulse-Width Modulation Technique for Modular Multilevel Converters

...

are the top articles of Marcelo A. Perez at Universidad Técnica Federico Santa María.

What are Marcelo A. Perez's research interests?

The research interests of Marcelo A. Perez are: Power electronics, multilevel converters, smart grids

What is Marcelo A. Perez's total number of citations?

Marcelo A. Perez has 16,737 citations in total.

What are the co-authors of Marcelo A. Perez?

The co-authors of Marcelo A. Perez are Jose Rodriguez, Josep Pou, Leopoldo García Franquelo, Samir Kouro, José R. Espinoza, Mariusz Malinowski.

    Co-Authors

    H-index: 111
    Jose Rodriguez

    Jose Rodriguez

    Universidad Andrés Bello

    H-index: 67
    Josep Pou

    Josep Pou

    Nanyang Technological University

    H-index: 61
    Leopoldo García Franquelo

    Leopoldo García Franquelo

    Universidad de Sevilla

    H-index: 58
    Samir Kouro

    Samir Kouro

    Universidad Técnica Federico Santa María

    H-index: 47
    José R. Espinoza

    José R. Espinoza

    Universidad de Concepción

    H-index: 36
    Mariusz Malinowski

    Mariusz Malinowski

    Politechnika Warszawska

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