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This work presents a novel dc-dc bidirectional buck–boost converter between a battery pack and the inverter to regulate the dc-bus in an electric vehicle (EV) powertrain. The converter is based on the versatile buck–boost converter, which has shown an excellent performance in different fuel cell systems operating in low-voltage and hard-switching applications. Therefore, extending this converter to higher voltage applications such as the EV is a challenging task reported in this work. A high-efficiency step-up/step-down versatile converter can improve the EV powertrain efficiency for an extended range of electric motor (EM) speeds, comprising urban and highway driving cycles while allowing the operation under motoring and regeneration (regenerative brake) conditions. DC-bus voltage regulation is implemented using a digital two-loop control strategy. The inner feedback loop is based on the discrete-time sliding-mode current control (DSMCC) strategy, and for the outer feedback loop, a proportional-integral (PI) control is employed. Both digital control loops and the necessary transition mode strategy are implemented using a digital signal controller TMS320F28377S. The theoretical analysis has been validated on a 400 V
Catalina González-Castaño; Carlos Restrepo; Samir Kouro; Enric Vidal-Idiarte; Javier Calvente. A Bidirectional Versatile Buck–Boost Converter Driver for Electric Vehicle Applications. Sensors 2021, 21, 5712 .
AMA StyleCatalina González-Castaño, Carlos Restrepo, Samir Kouro, Enric Vidal-Idiarte, Javier Calvente. A Bidirectional Versatile Buck–Boost Converter Driver for Electric Vehicle Applications. Sensors. 2021; 21 (17):5712.
Chicago/Turabian StyleCatalina González-Castaño; Carlos Restrepo; Samir Kouro; Enric Vidal-Idiarte; Javier Calvente. 2021. "A Bidirectional Versatile Buck–Boost Converter Driver for Electric Vehicle Applications." Sensors 21, no. 17: 5712.
In this paper, a design driven comparison between two 190 kVA industrial three-phase two-level voltage source converter (2L-VSC) designs based in silicon carbide (SiC) and silicon (Si) for 690 V grids is presented. These two designs were conceived to have the same nominal power, while switching at reasonable switching speeds and requiring the same case to ambient thermal impedance. Under these conditions, the designs were studied to detect the potential gains and limitations that a pragmatic converter design could feature when using these two technologies regarding cost, efficiency, size and weight. To achieve this, experimentally determined semiconductor characteristics were used to perform simulations, the results of which were then used to design the essential parts of the converter. These designed parts were then corroborated with manufacturers, from which physical characteristics of all designed components were obtained. The results show that the SiC based design presents substantial weight savings and an 11% system cost reduction, while preserving its traditional characteristics such as improved overall efficiency when compared to the silicon based design under the given design requirements and constraints.
Carlos Fuentes; Marcus Müller; Steffen Bernet; Samir Kouro. SiC-MOSFET or Si-IGBT: Comparison of Design and Key Characteristics of a 690 V Grid-Tied Industrial Two-Level Voltage Source Converter. Energies 2021, 14, 3054 .
AMA StyleCarlos Fuentes, Marcus Müller, Steffen Bernet, Samir Kouro. SiC-MOSFET or Si-IGBT: Comparison of Design and Key Characteristics of a 690 V Grid-Tied Industrial Two-Level Voltage Source Converter. Energies. 2021; 14 (11):3054.
Chicago/Turabian StyleCarlos Fuentes; Marcus Müller; Steffen Bernet; Samir Kouro. 2021. "SiC-MOSFET or Si-IGBT: Comparison of Design and Key Characteristics of a 690 V Grid-Tied Industrial Two-Level Voltage Source Converter." Energies 14, no. 11: 3054.
Energy structures from non-conventional energy source has become highly demanded nowadays. In this way, the maximum power extraction from photovoltaic (PV) systems has attracted the attention, therefore an optimization technique is necessary to improve the performance of solar systems. This article proposes the use of ABC (artificial bee colony) algorithm for the maximum power point tracking (MPPT) of a PV system using a DC-DC converter. The procedure of the ABC MPPT algorithm is using data values from PV module, the P-V characteristic is identified and the optimal voltage is selected. Then, the MPPT strategy is applied to obtain the voltage reference for the outer PI control loop, which in turn provides the current reference to the predictive digital current programmed control. A real-time and high-speed simulator (PLECS RT Box 1) and a digital signal controller (DSC) are used to implement the hardware-in-the-loop system to obtain the results. The general system does not have a high computational cost and can be implemented in a commercial low-cost DSC (TI 28069M). The proposed MPPT strategy is compared to the conventional perturb and observe method, results show the proposed method archives a much superior performance.
Catalina Gonzalez-Castano; Carlos Restrepo; Samir Kouro; Jose Rodriguez. MPPT Algorithm Based on Artificial Bee Colony for PV System. IEEE Access 2021, 9, 43121 -43133.
AMA StyleCatalina Gonzalez-Castano, Carlos Restrepo, Samir Kouro, Jose Rodriguez. MPPT Algorithm Based on Artificial Bee Colony for PV System. IEEE Access. 2021; 9 ():43121-43133.
Chicago/Turabian StyleCatalina Gonzalez-Castano; Carlos Restrepo; Samir Kouro; Jose Rodriguez. 2021. "MPPT Algorithm Based on Artificial Bee Colony for PV System." IEEE Access 9, no. : 43121-43133.
This paper proposes a new method for maximum power point tracking (MPPT) of the photovoltaic (PV) system while using a DC-DC boost converter. The conventional perturb and observe (P&O) method has a fast tracking response, but it presents oscillation around the maximum power point (MPP) in steady state. Therefore, to satisfy transient and steady-state responses, this paper presents a MPPT method using support vector machines (SVMs). The use of SVM will help to improve the tracking speed of maximum power point of the PV system without oscillations near MPP. A boost converter is used to implement the MPPT method, where the input voltage of the DC-DC converter is regulated using a double loop where the inner loop is a current control that is based on passivity. The MPPT structure is validated by hardware in the loop, a real time and high-speed simulator (PLECS RT Box 1), and a digital signal controller (DSC) are used to model the PV system and implement the control strategies, respectively. The proposed strategy presents low complexity and it is implemented in a commercial low-cost DSC (TI 28069M). The performance of the MPPT proposed is presented under challenging experimental profiles with solar irradiance and temperature variations across the panel. In addition, the performance of the proposed method is compared with the P&O method, which is traditionally most often used in MPPT under demanding tests, in order to demonstrate the superiority of the strategy presented.
Catalina González-Castaño; James Marulanda; Carlos Restrepo; Samir Kouro; Alfonso Alzate; Jose Rodriguez. Hardware-in-the-Loop to Test an MPPT Technique of Solar Photovoltaic System: A Support Vector Machine Approach. Sustainability 2021, 13, 3000 .
AMA StyleCatalina González-Castaño, James Marulanda, Carlos Restrepo, Samir Kouro, Alfonso Alzate, Jose Rodriguez. Hardware-in-the-Loop to Test an MPPT Technique of Solar Photovoltaic System: A Support Vector Machine Approach. Sustainability. 2021; 13 (6):3000.
Chicago/Turabian StyleCatalina González-Castaño; James Marulanda; Carlos Restrepo; Samir Kouro; Alfonso Alzate; Jose Rodriguez. 2021. "Hardware-in-the-Loop to Test an MPPT Technique of Solar Photovoltaic System: A Support Vector Machine Approach." Sustainability 13, no. 6: 3000.
Sebastian Rivera; Samir Kouro; Sergio Vazquez; Stefan M. Goetz; Ricardo Lizana; Enrique Romero-Cadaval. Electric Vehicle Charging Infrastructure -- From Grid to Battery. IEEE Industrial Electronics Magazine 2021, PP, 1 .
AMA StyleSebastian Rivera, Samir Kouro, Sergio Vazquez, Stefan M. Goetz, Ricardo Lizana, Enrique Romero-Cadaval. Electric Vehicle Charging Infrastructure -- From Grid to Battery. IEEE Industrial Electronics Magazine. 2021; PP (99):1.
Chicago/Turabian StyleSebastian Rivera; Samir Kouro; Sergio Vazquez; Stefan M. Goetz; Ricardo Lizana; Enrique Romero-Cadaval. 2021. "Electric Vehicle Charging Infrastructure -- From Grid to Battery." IEEE Industrial Electronics Magazine PP, no. 99: 1.
Modular converters such as the multilevel cascaded H-bridge (CHB) are an attractive option for multiple applications mainly because of the inherent modularity and fault tolerant operation. This paper is focused on the CHB converter operating with unbalanced conditions (different dc voltages and/or modulation indexes). Under these circumstances, applying the conventional control and modulation strategies, the output voltage harmonic spectrum is degraded. In this paper, a generalized variable-angle phase-shifted PWM technique for CHB converters with a large number of power modules (> 3) is presented. The method considers all possible cells‘ combinations to form groups and assigns the role of each cell in the group. This cell role defines the identifier of the cell in the variable-angle PS-PWM technique. In steady state, in each group of cells the harmonic distortion of the CHB output voltage located at twice the carrier frequency fc is eliminated whilst the distortion at 4fc is also diminished. Experimental results show how the proposed technique achieves a superior harmonic performance without introducing any significant disadvantage.
Abraham Marquez Alcaide; Jose I. Leon; Ramon Portillo; Jiapeng Yin; Wensheng Luo; Sergio Vazquez; Samir Kouro; Leopoldo G. Franquelo. Variable-Angle PS-PWM Technique for Multilevel Cascaded H-Bridge Converters With Large Number of Power Cells. IEEE Transactions on Industrial Electronics 2020, 68, 6773 -6783.
AMA StyleAbraham Marquez Alcaide, Jose I. Leon, Ramon Portillo, Jiapeng Yin, Wensheng Luo, Sergio Vazquez, Samir Kouro, Leopoldo G. Franquelo. Variable-Angle PS-PWM Technique for Multilevel Cascaded H-Bridge Converters With Large Number of Power Cells. IEEE Transactions on Industrial Electronics. 2020; 68 (8):6773-6783.
Chicago/Turabian StyleAbraham Marquez Alcaide; Jose I. Leon; Ramon Portillo; Jiapeng Yin; Wensheng Luo; Sergio Vazquez; Samir Kouro; Leopoldo G. Franquelo. 2020. "Variable-Angle PS-PWM Technique for Multilevel Cascaded H-Bridge Converters With Large Number of Power Cells." IEEE Transactions on Industrial Electronics 68, no. 8: 6773-6783.
This paper provides a detailed analysis of the power electronics solutions enabling bipolar dc grids. The bipolar dc grid concept has proven to be more efficient, flexible and higher in quality than the conventional unipolar one. However, despite its many features, these systems still have to overcome their issues with asymmetrical loading to avoid voltage imbalances, besides meeting regulatory and safety requirements that are still under development. Advances in power electronics and the large-scale deployment of dc consumer appliances has put this growing architecture in the spotlight, as it has drawn the attention of different research groups recently. The following pages provide an insightful discussion regarding the topologies that enable these architectures, their regulatory requirements besides their features and level of development. Additionally, some future trends and challenges in the further development of this technology are discussed to motivate future contributions that address open problems and explore new possibilities.
Sebastian Rivera; Ricardo Lizana F.; Samir Kouro; Tomislav Dragicevic; Bin Wu. Bipolar DC Power Conversion: State-of-the-Art and Emerging Technologies. IEEE Journal of Emerging and Selected Topics in Power Electronics 2020, 9, 1192 -1204.
AMA StyleSebastian Rivera, Ricardo Lizana F., Samir Kouro, Tomislav Dragicevic, Bin Wu. Bipolar DC Power Conversion: State-of-the-Art and Emerging Technologies. IEEE Journal of Emerging and Selected Topics in Power Electronics. 2020; 9 (2):1192-1204.
Chicago/Turabian StyleSebastian Rivera; Ricardo Lizana F.; Samir Kouro; Tomislav Dragicevic; Bin Wu. 2020. "Bipolar DC Power Conversion: State-of-the-Art and Emerging Technologies." IEEE Journal of Emerging and Selected Topics in Power Electronics 9, no. 2: 1192-1204.
Finite Control Set Model Predictive Control (FCS-MPC) chooses at each sampling period the input control vector state without using a modulator. Therefore, it belongs to the direct control family. As a consequence, the conventional implementation of FCS-MPC presents variable switching frequency. This makes difficult the design of the output filter. This paper investigates the Period Control Approach (PCA-MPC) to achieve a fixed switching pattern, similar to that of modulated strategies placed at a desired frequency. PCA-MPC cannot reach a reference switching frequency without a steady state error. Nonetheless, it is more than capable of reaching a fixed switching pattern, with clean spectrum at a wide range of switching frequencies. This feature is used here to design an embedded control objective to reach the desired switching frequency. The implementation of the cost function is done through modification of PCA-MPC measurements. These modifications allow one to obtain fast and precise estimates of the switching frequency, which in turn permits a fast control. The performance of this control strategy is evaluated through simulation and corroborated by experimental validation on a two-level three-phase, power converter.
Matias Aguirre; Samir Kouro; Christian Alexis Rojas; Sergio Vazquez. Enhanced Switching Frequency Control in FCS-MPC for Power Converters. IEEE Transactions on Industrial Electronics 2020, 68, 2470 -2479.
AMA StyleMatias Aguirre, Samir Kouro, Christian Alexis Rojas, Sergio Vazquez. Enhanced Switching Frequency Control in FCS-MPC for Power Converters. IEEE Transactions on Industrial Electronics. 2020; 68 (3):2470-2479.
Chicago/Turabian StyleMatias Aguirre; Samir Kouro; Christian Alexis Rojas; Sergio Vazquez. 2020. "Enhanced Switching Frequency Control in FCS-MPC for Power Converters." IEEE Transactions on Industrial Electronics 68, no. 3: 2470-2479.
Single-stage voltage step-up inverters, such as the Dual Boost Inverter (DBI), have a large operating range imposed by the high step-up voltage ratio, which together with the converter of non-linearities, makes them a challenge to control. This is particularly the case for grid-connected applications, where several cascaded and independent control loops are necessary for each converter of the DBI. This paper presents a global current control method based on a combination of a linear proportional resonant controller and a non-linear sliding mode controller that simplifies the controller design and implementation. The proposed control method is validated using a grid-connected laboratory prototype. Experimental results show the correct performance of the controller and compliance with power quality standards.
Diana Lopez-Caiza; Freddy Flores-Bahamonde; Samir Kouro; Victor Santana; Nicolas Muller; Andrii Chub. Sliding Mode Based Control of Dual Boost Inverter for Grid Connection. Energies 2019, 12, 4241 .
AMA StyleDiana Lopez-Caiza, Freddy Flores-Bahamonde, Samir Kouro, Victor Santana, Nicolas Muller, Andrii Chub. Sliding Mode Based Control of Dual Boost Inverter for Grid Connection. Energies. 2019; 12 (22):4241.
Chicago/Turabian StyleDiana Lopez-Caiza; Freddy Flores-Bahamonde; Samir Kouro; Victor Santana; Nicolas Muller; Andrii Chub. 2019. "Sliding Mode Based Control of Dual Boost Inverter for Grid Connection." Energies 12, no. 22: 4241.
In this paper, a detailed hard switching behavior comparison between a 1700V SiC Mosfet module and a 1700V Si IGBT module was performed in an identical low inductive commutation circuit for comparable driving conditions. To accomplish this, devices using same module formats were used and carefully selected to match thermal characteristics in the exact same commutation circuit. Furthermore, a simulation of the modules in inverter operation based on the experimental results and complimented by datasheet based on-state values and foster thermal models has been performed to study losses, junction temperatures and current utilization. These results are further discussed to highlight advantages and limitations regarding these state-of-art SiC devices versus relative cost when contrasted with a comparable Si-based device.
Carlos D. Fuentes; Samir Kouro; Steffen Bernet. Comparison of 1700-V SiC-MOSFET and Si-IGBT Modules Under Identical Test Setup Conditions. IEEE Transactions on Industry Applications 2019, 55, 7765 -7775.
AMA StyleCarlos D. Fuentes, Samir Kouro, Steffen Bernet. Comparison of 1700-V SiC-MOSFET and Si-IGBT Modules Under Identical Test Setup Conditions. IEEE Transactions on Industry Applications. 2019; 55 (6):7765-7775.
Chicago/Turabian StyleCarlos D. Fuentes; Samir Kouro; Steffen Bernet. 2019. "Comparison of 1700-V SiC-MOSFET and Si-IGBT Modules Under Identical Test Setup Conditions." IEEE Transactions on Industry Applications 55, no. 6: 7765-7775.
This paper presents an analyses of an Energy Storage System (ESS) for grid-tied photovoltaic (PV) systems, in order to harness the energy usually lost due to PV array oversizing. A real case of annual PV power generation analysis is presented to illustrate the existing problem and future solutions. Three PV modeling techniques have been applied to estimate non-measured non-harnessed PV power to provide an ESS energy and power sizing strategy. Moreover, a control strategy to store or release power from the DC-link, without modifying the Maximum Power Point Tracking (MPPT) strategy, is presented. The results show an estimation of the annual power loss caused by oversizing the PV array. The ESS sizing strategy gives insight into not only the energy requirements, but also the power requirements of the system. Simulation results show that the proposed ESS control strategy is capable of harnessing the extra power without modifying the existing power converter of the PV plant nor its control strategy.
Nicolas Muller; Samir Kouro; Pericle Zanchetta; Patrick Wheeler; Gustavo Bittner; Francesco Girardi. Energy Storage Sizing Strategy for Grid-Tied PV Plants under Power Clipping Limitations. Energies 2019, 12, 1812 .
AMA StyleNicolas Muller, Samir Kouro, Pericle Zanchetta, Patrick Wheeler, Gustavo Bittner, Francesco Girardi. Energy Storage Sizing Strategy for Grid-Tied PV Plants under Power Clipping Limitations. Energies. 2019; 12 (9):1812.
Chicago/Turabian StyleNicolas Muller; Samir Kouro; Pericle Zanchetta; Patrick Wheeler; Gustavo Bittner; Francesco Girardi. 2019. "Energy Storage Sizing Strategy for Grid-Tied PV Plants under Power Clipping Limitations." Energies 12, no. 9: 1812.
Multilevel converters are widely considered to be the most suitable configurations for renewable energy sources. Their high-power quality, efficiency and performance make them interesting for PV applications. In low-power applications such as rooftop grid-connected PV systems, power converters with high efficiency and reliability are required. For this reason, multilevel converters based on parallel and cascaded configurations have been proposed and commercialized in the industry. Motivated by the features of multilevel converters based on cascaded configurations, this work presents the modulation and control of a rooftop single-phase grid-connected photovoltaic multilevel system. The configuration has a symmetrical cascade connection of two three-level T-type neutral point clamped power legs, which creates a five-level converter with two independent string connections. The proposed topology merges the benefits of multi-string PV and symmetrical cascade multilevel inverters. The switching operation principle, modulation technique and control scheme under an unbalanced power operation among the cell are addressed. Simulation and experimental validation results in a reduced-scale power single-phase converter prototype under variable conditions at different set points for both PV strings are presented. Finally, a comparative numerical analysis between other T-type configurations to highlight the advantages of the studied configuration is included.
Cristian Verdugo; Samir Kouro; Christian A. Rojas; Marcelo A. Perez; Thierry Meynard; Mariusz Malinowski. Five-Level T-type Cascade Converter for Rooftop Grid-Connected Photovoltaic Systems. Energies 2019, 12, 1743 .
AMA StyleCristian Verdugo, Samir Kouro, Christian A. Rojas, Marcelo A. Perez, Thierry Meynard, Mariusz Malinowski. Five-Level T-type Cascade Converter for Rooftop Grid-Connected Photovoltaic Systems. Energies. 2019; 12 (9):1743.
Chicago/Turabian StyleCristian Verdugo; Samir Kouro; Christian A. Rojas; Marcelo A. Perez; Thierry Meynard; Mariusz Malinowski. 2019. "Five-Level T-type Cascade Converter for Rooftop Grid-Connected Photovoltaic Systems." Energies 12, no. 9: 1743.
Photovoltaic (PV) systems composed by two energy conversion stages are attractive from an operation point of view. This is because the maximum power point tracking (MPPT) range is extended, due to the voltage decoupling between the PV system and the dc-link. Nevertheless, the additional dc-dc conversion stage increases the volume, cost and power converter losses. Therefore, central inverters based on a single-stage converter, have been a mainstream solution to interface large-scale PV arrays composed of several strings connected in parallel made by the series connections of PV modules. The concept of partial power converters (PPC), previously reported as a voltage step-up stage, has not addressed in depth for all types of PV applications. In this work, a PPC performing voltage step-down operation is proposed and analyzed. This concept is interesting from the industry point of view, since with the new isolation standards of PV modules are reaching 1500 V, increasing both the size of the string and dc-link voltage for single-stage inverters. Since grid connection remains typically at 690 V, larger strings impose more demanding operation for single-stage central inverters (required to operate at lower modulation indexes and demand higher blocking voltage devices), making the proposed step-down PPC an attractive solution. Theoretical analysis and an experimental test-bench was built in order to validate the PPC concept, the control performance and the improvement of the conversion efficiency. The experimental results corroborate the benefits of using a PPC, in terms of increasing the system efficiency by reducing the processed power of the converter, while not affecting the system performance.
Jaime Wladimir Zapata; Samir Kouro; Gonzalo Carrasco; Thierry A. Meynard. Step-Down Partial Power DC-DC Converters for Two-Stage Photovoltaic String Inverters. Electronics 2019, 8, 87 .
AMA StyleJaime Wladimir Zapata, Samir Kouro, Gonzalo Carrasco, Thierry A. Meynard. Step-Down Partial Power DC-DC Converters for Two-Stage Photovoltaic String Inverters. Electronics. 2019; 8 (1):87.
Chicago/Turabian StyleJaime Wladimir Zapata; Samir Kouro; Gonzalo Carrasco; Thierry A. Meynard. 2019. "Step-Down Partial Power DC-DC Converters for Two-Stage Photovoltaic String Inverters." Electronics 8, no. 1: 87.
Giovanni Spagnuolo; Samir Kouro; Dmitri Vinnikov. Photovoltaic Module and Submodule Level Power Electronics and Control. IEEE Transactions on Industrial Electronics 2019, 66, 3856 -3859.
AMA StyleGiovanni Spagnuolo, Samir Kouro, Dmitri Vinnikov. Photovoltaic Module and Submodule Level Power Electronics and Control. IEEE Transactions on Industrial Electronics. 2019; 66 (5):3856-3859.
Chicago/Turabian StyleGiovanni Spagnuolo; Samir Kouro; Dmitri Vinnikov. 2019. "Photovoltaic Module and Submodule Level Power Electronics and Control." IEEE Transactions on Industrial Electronics 66, no. 5: 3856-3859.
The following topics are dealt with: machine control; aircraft power systems; power convertors; electric vehicles; permanent magnet motors; DC-DC power convertors; invertors; synchronous motors; battery powered vehicles; electric current control.
Mario Lopez; Marcelo A. Perez; Samir Kouro. Current Control of Interleaved DC-DC Converter in Continuous and Discontinuous Mode. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) 2018, 1 -6.
AMA StyleMario Lopez, Marcelo A. Perez, Samir Kouro. Current Control of Interleaved DC-DC Converter in Continuous and Discontinuous Mode. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC). 2018; ():1-6.
Chicago/Turabian StyleMario Lopez; Marcelo A. Perez; Samir Kouro. 2018. "Current Control of Interleaved DC-DC Converter in Continuous and Discontinuous Mode." 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) , no. : 1-6.
During the last decades, AC systems dominated the power transmission and distribution applications almost exclusively. However, a recent convergence of needs originated in different sectors (renewable energy conversion, information technology and transportation) have accelerated the development of DC systems. Nowadays, DC systems are present at both transmission and distribution levels, offering high-performance solutions with enhanced efficiency and reliability, besides reducing the number of power conversion stages involved and uninterrupted power delivery. For LVDC active networks, two kinds of architectures are possible: unipolar and bipolar. Despite being a more sophisticated and technically complex solution, bipolar structure provide several advantages over conventional unipolar ones. Higher availability, efficiency and flexibility are just a few advantages featured by bipolar systems. This chapter presented a brief overview covering the different aspects of bipolar LVDC networks. Distribution converter topologies, balancing stages and also their control schemes are discussed in order to highlight the efforts being made in this growing architecture.
Sebastian Rivera; Ricardo Lizana; Samir Kouro; Bin Wu. Bipolar-type DC microgrids for high-quality power distribution. DC Distribution Systems and Microgrids 2018, 245 -266.
AMA StyleSebastian Rivera, Ricardo Lizana, Samir Kouro, Bin Wu. Bipolar-type DC microgrids for high-quality power distribution. DC Distribution Systems and Microgrids. 2018; ():245-266.
Chicago/Turabian StyleSebastian Rivera; Ricardo Lizana; Samir Kouro; Bin Wu. 2018. "Bipolar-type DC microgrids for high-quality power distribution." DC Distribution Systems and Microgrids , no. : 245-266.
This paper presents a new partial power converter (PPC) for the DC-DC stage of electric vehicle (EV) fast charging stations. The proposed converter handles only a fraction of the total power delivered from the grid to the battery, increasing the overall system efficiency and power density, while potentially reducing the cost of the charger. The proposed topology is based on a switched capacitor between the AC terminals of an H-bridge converter, and does not require high frequency isolation transformers to provide a controllable voltage source between the DC-link and the battery. The proposed concept can be implemented using interleaved power cells, which can improve the power quality, reduce inductor size, and enable scalability for higher power rating chargers. The operating principle, partial operation analysis, control scheme, and simulation results are presented to validate the proposed concept.
Sebastian Rivera; Daniel Pesantez; Samir Kouro; Peter W. Lehn. Pseudo-Partial-Power Converter without High Frequency Transformer for Electric Vehicle Fast Charging Stations. 2018 IEEE Energy Conversion Congress and Exposition (ECCE) 2018, 1208 -1213.
AMA StyleSebastian Rivera, Daniel Pesantez, Samir Kouro, Peter W. Lehn. Pseudo-Partial-Power Converter without High Frequency Transformer for Electric Vehicle Fast Charging Stations. 2018 IEEE Energy Conversion Congress and Exposition (ECCE). 2018; ():1208-1213.
Chicago/Turabian StyleSebastian Rivera; Daniel Pesantez; Samir Kouro; Peter W. Lehn. 2018. "Pseudo-Partial-Power Converter without High Frequency Transformer for Electric Vehicle Fast Charging Stations." 2018 IEEE Energy Conversion Congress and Exposition (ECCE) , no. : 1208-1213.
Two-stage photovoltaic (PV) configurations have become increasingly popular due to the decoupling between the inverter dc-link voltage and the PV voltage, adding flexibility to extend the MPPT range. However, the additional dc-dc converter increases the power converter losses. The concept of partial power converters (PPC), which reduce the amount of power handled by the dc-stage can mitigate this effect. However, the type of topology, its power and voltage rating, efficiency, and operating range can vary significantly depending on the function (boosting or reducing voltage) and type of PV application and scale (micro-, string- or multi-sting inverter). This paper analyses of the possible configuration of connections of PPC depending on the application and scale of the PV system, and introduces a new buck-type PPC. Three solutions for practical PV systems are further elaborated, including experimental validation. Results show that the PPC concept greatly improves the overall PV system efficiency with the added benefit that the dc-dc stage power ratings achieved are only a fraction of the PV system, reducing size and cost of the power converter without affecting system performance.
Jaime W. Zapata; Samir Kouro; Gonzalo Carrasco; Hugues Renaudineau; Thierry Meynard. Analysis of Partial Power DC–DC Converters for Two-Stage Photovoltaic Systems. IEEE Journal of Emerging and Selected Topics in Power Electronics 2018, 7, 591 -603.
AMA StyleJaime W. Zapata, Samir Kouro, Gonzalo Carrasco, Hugues Renaudineau, Thierry Meynard. Analysis of Partial Power DC–DC Converters for Two-Stage Photovoltaic Systems. IEEE Journal of Emerging and Selected Topics in Power Electronics. 2018; 7 (1):591-603.
Chicago/Turabian StyleJaime W. Zapata; Samir Kouro; Gonzalo Carrasco; Hugues Renaudineau; Thierry Meynard. 2018. "Analysis of Partial Power DC–DC Converters for Two-Stage Photovoltaic Systems." IEEE Journal of Emerging and Selected Topics in Power Electronics 7, no. 1: 591-603.
This work presents a partial power converter allowing us to obtain, with a single DC-DC converter, the same feature as the classical interleaved operation of two converters. More precisely, the proposed topology performs similarly as the input-parallel output-series (IPOS) configuration reducing the current ripple at the input of the system and dividing the individual converters power rating, compared to a single converter. The proposed topology consists of a partial DC-DC converter processing only a fraction of the total power, thus allowing high efficiency. Experimental results are provided to validate the proposed converter topology with a Flyback-based 100 W test bench with a transformer turns ratio n1=n2. Experimental results show high performances reducing the input current ripple around 30%, further increasing the conversion efficiency.
Jaime Wladimir Zapata; Samir Kouro; Gonzalo Carrasco; Hugues Renaudineau. Step-Up Partial Power DC-DC Converters for Two-Stage PV Systems with Interleaved Current Performance. Energies 2018, 11, 357 .
AMA StyleJaime Wladimir Zapata, Samir Kouro, Gonzalo Carrasco, Hugues Renaudineau. Step-Up Partial Power DC-DC Converters for Two-Stage PV Systems with Interleaved Current Performance. Energies. 2018; 11 (2):357.
Chicago/Turabian StyleJaime Wladimir Zapata; Samir Kouro; Gonzalo Carrasco; Hugues Renaudineau. 2018. "Step-Up Partial Power DC-DC Converters for Two-Stage PV Systems with Interleaved Current Performance." Energies 11, no. 2: 357.
This paper presents the harmonic interaction between multiple multilevel photovoltaic (PV) systems based on the well-known T-type Neutral-Point-Clamped inverter (3L-TNPC) connected to a common ac bus by using distribution voltage feeders. The analysis is performed by using the Norton equivalence model of each power circuit and the potential overall impedance resonances with the ac grid. The contribution of this work is the development of a current harmonic injection model of this inverter operating under a polluted voltage grid for harmonic analysis. The proposed model is evaluated with the switching model by using comprehensively simulations.
Christian A. Rojas; Samir Kouro; Rubén Inzunza; Koichi Okuno; Yasuaki Mitsugi. Harmonic interaction modelling of multiple utility-interactive multilevel photovoltaic systems. 2017 IEEE Southern Power Electronics Conference (SPEC) 2017, 1 -6.
AMA StyleChristian A. Rojas, Samir Kouro, Rubén Inzunza, Koichi Okuno, Yasuaki Mitsugi. Harmonic interaction modelling of multiple utility-interactive multilevel photovoltaic systems. 2017 IEEE Southern Power Electronics Conference (SPEC). 2017; ():1-6.
Chicago/Turabian StyleChristian A. Rojas; Samir Kouro; Rubén Inzunza; Koichi Okuno; Yasuaki Mitsugi. 2017. "Harmonic interaction modelling of multiple utility-interactive multilevel photovoltaic systems." 2017 IEEE Southern Power Electronics Conference (SPEC) , no. : 1-6.