Article
Energy & Fuels
Ahmed Ismail M. Ali, Mahmoud A. Sayed, Ahmed A. S. Mohamed
Summary: This paper proposes a simple single-phase new pulse-width modulated seven-level inverter architecture for photovoltaic systems supporting home-grid with electric vehicle charging port. The proposed inverter requires simple control and switching strategies, and shows less output-voltage total harmonic distortion, unity power factor operation, and reduced number of power components compared to recently published topologies. An experimental prototype was built and tested, demonstrating an enhanced inverter operating efficiency with load current THD following IEEE standards for DER applications.
Article
Computer Science, Artificial Intelligence
C. R. Rajesh, P. Meenalochini, Sathish Kumar Kannaiah, A. Bindu
Summary: This manuscript proposes a hybrid control technique for the grid-connected photovoltaic generation system, which utilizes a cascaded multilevel inverter to enhance the control signals and optimize the power quality.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Computer Science, Information Systems
C. Dhanamjayulu, Sanjeevikumar Padmanaban, Jens Bo Holm-Nielsen, Frede Blaabjerg
Summary: A new single-phase 15-level inverter for Solar PV application is proposed, which can generate fifteen stepped output voltage levels with lower THD, improving efficiency and reducing losses in the overall system. Experimental results show the effectiveness of the inverter under different circumstances of linear and non-linear loads.
Review
Energy & Fuels
Ali Bughneda, Mohamed Salem, Anna Richelli, Dahaman Ishak, Salah Alatai
Summary: The increasing number of users and emergence of high-power industries have significantly raised energy demand from the power grid, leading to a rise in global emissions with conventional energy generation. As a result, the penetration of renewable energy resources into the power grid has significantly increased, with photovoltaic systems becoming the most popular resource.
Article
Chemistry, Multidisciplinary
Kuo-Hua Huang, Kuei-Hsiang Chao, Zhi-Yao Sun, Cheng-Yi Ho
Summary: The main purpose of this paper is to design and implement three-phase smart inverters for grid-connected photovoltaic systems. The inverters include maximum power point tracking (MPPT) and smart control for real power and reactive power regulation. The PLECS power electronic real-time control system is used to simulate and test the system, and the KC200GT photovoltaic module is used for the simulation. The results show the effectiveness of the smart inverter's regulation performance.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Hassan Yousif Ahmed, Omar Abdel-Rahim, Ziad M. Ali
Summary: This paper proposes a new high step-up seven-level two-stage multilevel inverter for a grid-connected Photovoltaic (PV) system. It consists of a switched capacitor boost converter and a seven-level seven-switches multilevel inverter. The converter is designed to extract maximum power from PV module and boost its input voltage, and the inverter has a reduced number of switches and reduced conduction. The system achieves a wide voltage gain and has a low current total harmonic distortion (THD). The simulated efficiency of the system reaches 96%.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Kitmo, Repele Djidimbele, Dieudonne Kaoga Kidmo, Guy Bertrand Tchaya, Noel Djongyang
Summary: This article presents a method for reducing harmonics generated by photovoltaic generators in electrical networks using parallel active filters based on seven-level inverters. The modified perturb and observe algorithm is used to extract maximum power from the generators, while four-level active filters are employed to filter out harmonic quantities. Evaluation of the proposed algorithm and model shows a total harmonic distortion rate of 0.04, lower than IEEE standards, with voltage and current in phase after energy injection.
Article
Computer Science, Artificial Intelligence
Chidambaram Rajeswari, M. Santhi
Summary: An Ann-level multilevel inverter for PV connected systems is proposed in this paper, combining a buck-boost converter and an H-bridge inverter to produce a constant AC output voltage with multilevels. The system allows for varying levels of output voltage by adjusting the duty cycle of the buck-boost converter using an n-level generation algorithm, significantly reducing THD. The voltage regulation process is enhanced with an optimized FOPID controller and modified flower pollination algorithm, improving voltage regulation characteristics.
Review
Energy & Fuels
Abdul Jabbar Memon, Mukhtiar Ahmed Mahar, Abdul Sattar Larik, Muhammad Mujtaba Shaikh
Summary: This article provides a comprehensive review of reduced device count multilevel inverter (RDC MLI) topologies for PV systems. Multilevel inverters are widely used in various applications due to their high modularity and high-power quality output. The literature in this field shows a need for accurate selection of multilevel inverter topologies. To simplify this complexity, this review presents the state of the art of various RDC MLI topologies and provides a detailed comparison. It serves as an important reference tool for future work on RDC MLI for PV systems.
Review
Energy & Fuels
Mohamed Derbeli, Cristian Napole, Oscar Barambones, Jesus Sanchez, Isidro Calvo, Pablo Fernandez-Bustamante
Summary: This article reviews essential control techniques for maximum power point tracking (MPPT) in photovoltaic panel systems and experimentally evaluates different types of MPPT algorithms using an artificial neural network as a reference generator. The implementation outcomes of sliding mode controller, fuzzy logic controller, and model predictive control are compared based on various factors related to hardware and software.
Article
Multidisciplinary Sciences
Yacine Bouali, Khoukha Imarazene, El Madjid Berkouk
Summary: Multilevel converters are crucial in high- and medium-power applications, but harmonics pose a common issue. This study optimizes total harmonic distortion in various-level inverters using genetic algorithms and proposes a multilevel boost DC-DC converter to address DC-link capacitor voltage imbalances.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Ashraf Ali Khan, Wilson Eberle, Liwei Wang, Usman Ali Khan, Shehab Ahmed, Mohammed Agamy
Summary: This article presents a novel family of multilevel inverters for photovoltaic applications, featuring high performance, reliable circuit operation, and effective output voltage level management.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Energy & Fuels
Sheila Safaee, Abbas Ketabi, Mohammad Farshadnia, Mohammad Shahidehpour
Summary: This article presents a novel multi-port modular multilevel inverter topology for grid-connected photovoltaic systems, featuring smaller capacitor size. The proposed topology allows modularity and expansion for PV integration, with independent maximum power point tracking controllers for optimized energy extraction. A model-predictive control scheme minimizes circulating currents and balances capacitor voltages, maintaining THD within limits for injected solar power into the grid. Performance validation under various radiation conditions indicates desirable operation of the proposed multi-port MMC topology.
ENERGY SCIENCE & ENGINEERING
(2021)
Article
Computer Science, Information Systems
Allamsetty Hema Chander, K. Dhananjay Rao, Bankupalli Phani Teja, Lalit Kumar Sahu, Subhojit Dawn, Faisal Alsaif, Sager Alsulamy, Taha Selim Ustun
Summary: This paper proposes a modular transformerless grid-connected photovoltaic multilevel inverter that can achieve the individual maximum power point of each module under different operating scenarios. It utilizes a single-phase synchronous reference frame PI controller to control the load demand and grid voltage. The proposed configuration employs only 18 components and has an efficiency range of 89-95%. It also complies with the German VDE 0126-1-1 standards regarding common-mode voltage and leakage current suitability for grid-connected systems.
Article
Automation & Control Systems
Sandeep Sahoo, Shailendra Kumar, Bhim Singh
Summary: This article introduces the Wiener variable step size with variance smoothening (WVSSV) technique for the utility supportive solar photovoltaic (PV) system. The WVSSV technique controls the dc-ac converter to perform power factor correction, compensation of nonactive component, and reduction of total harmonics distortion (THD) from the utility grid. It presents robustness and good adaptation in highly adverse nonlinear load conditions.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Aleksandr Viatkin, Riccardo Mandrioli, Manel Hammami, Mattia Ricco, Gabriele Grandi
Summary: This paper provides a thorough analytical derivation of AC current ripple for three-phase four-leg voltage-source converters under different working conditions. The derived equations not only apply to known CBM methods, but can also be effectively used to design conversion systems in compliance with grid codes.
Article
Energy & Fuels
Riccardo Mandrioli, Aleksandr Viatkin, Manel Hammami, Mattia Ricco, Gabriele Grandi
Summary: This paper predicts the DC-link voltage switching ripples in three-phase four-leg inverters operating in balanced and unbalanced conditions, demonstrating their performance in home-charging or vehicle-to-home applications and validating the results through numerical simulations and experimental tests.
Article
Energy & Fuels
Aleksandr Viatkin, Riccardo Mandrioli, Manel Hammami, Mattia Ricco, Gabriele Grandi
Summary: This paper presents a comprehensive study of peak-to-peak and root-mean-square (RMS) values of AC current ripples in three-phase four-leg converters with uncoupled AC interface inductors. The derived expressions are effective for accurate AC current ripple calculations. Comparisons between three-leg and four-leg converters with distinct line inductance values are made, and a design example demonstrates the power of the derived equations. Numerical simulations and extensive experimental tests validate the analytical developments.
Article
Computer Science, Information Systems
Riccardo Mandrioli, Manel Hammami, Aleksandr Viatkin, Riccardo Barbone, Davide Pontara, Mattia Ricco
Summary: This paper analyzes the current switching ripple in a three-phase four-wire split-capacitor converter and proposes the single-carrier sinusoidal PWM modulation technique and interleaved multiple-carrier PWM strategy to mitigate the current ripple in the neutral wire. Numerical simulations and experimental tests were conducted to verify the analytical developments.
Article
Energy & Fuels
Francesco Lo Franco, Antonio Morandi, Pietro Raboni, Gabriele Grandi
Summary: In this study, the efficiency of power conversion systems (PCS) between AC- and DC-coupling solutions in a 288 MWp PV plant with a 275 MWh BESS was compared. A charging and discharging strategy for BESS was proposed to ensure cyclic battery energy shifting. Power flows in different components of the system were obtained under realistic operating conditions, and total energy losses and annual average efficiency were calculated. Results indicated a higher efficiency of DC-coupling compared to the AC-coupling layout.
Article
Automation & Control Systems
Aleksandr Viatkin, Mattia Ricco, Riccardo Mandrioli, Tamas Kerekes, Remus Teodorescu, Gabriele Grandi
Summary: A new Modular Multilevel Converter with Interleaved half-bridge Sub-Modules (ISM-MMC) is proposed in this article, which exhibits higher modularity and scalability for ultrafast chargers. A hybrid modulation scheme is implemented to exploit the advantages of the interleaving scheme. Comparative study verifies the effectiveness of the proposed topology.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Marija Vujacic, Obrad Dordevic, Riccardo Mandrioli, Gabriele Grandi
Summary: The performance and operating mode of inverters may be affected by inverter input current and voltage ripple. The unbalanced current in multiphase inverters can cause low-frequency transient power oscillations. Analyzing through symmetric sequence components can help in designing appropriate dc-link capacitors for inverters.
IET ELECTRIC POWER APPLICATIONS
(2022)
Article
Computer Science, Information Systems
Riccardo Barbone, Riccardo Mandrioli, Mattia Ricco, Rudolf Francesco Paternost, Vincenzo Cirimele, Gabriele Grandi
Summary: This paper emphasizes the importance of studying and simulating a monitoring system for trolleybus infrastructures and proposes a new model that accurately simulates complex catenary systems. The research findings indicate the obsolescence of conventional design methods.
Article
Green & Sustainable Science & Technology
Francesco Lo Franco, Vincenzo Cirimele, Mattia Ricco, Vitor Monteiro, Joao L. Afonso, Gabriele Grandi
Summary: Electric car-sharing is gaining popularity in European cities. Managing an electric car fleet is more complex than a traditional fleet due to longer refueling times and limited range. This paper proposes a smart charging method that optimizes the utilization of charging points to support electric car-sharing operators.
Article
Automation & Control Systems
Aleksandr Viatkin, Mattia Ricco, Riccardo Mandrioli, Tamas Kerekes, Remus Teodorescu, Gabriele Grandi
Summary: A new state-observer-based current balancing method for ISM-MMC is proposed, which reduces imbalance by estimating currents and voltages, and a novel capacitor voltage balancing strategy is developed.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Riccardo Mandrioli, Francesco Lo Franco, Mattia Ricco, Gabriele Grandi
Summary: This manuscript proposes a novel approach for determining phase and neutral-current-ripple RMS in grid-connected four-leg inverters with the neutral inductor. The harmonic pollution is determined for any arbitrary pulse width modulation (PWM) technique and a generic value of the neutral inductor. The findings permit one to compare different design choices in multiple scenarios effectively and they were validated by numerical simulations and experimental tests employing popular PWM techniques.
Article
Energy & Fuels
Francesco Lo Franco, Mattia Ricco, Vincenzo Cirimele, Valerio Apicella, Benedetto Carambia, Gabriele Grandi
Summary: The penetration growth of electric vehicles (EVs) is crucial for reducing transportation-related local pollutants. Most countries are rapidly developing charging infrastructure to accommodate the increasing EV energy demand. However, forecasting power demand for EV charging is challenging due to various factors, such as the limited number of EVs, diverse user behaviors, heterogeneous charging infrastructure and EV population, and uncertainty regarding the initial state of charge (SOC) distribution. This paper proposes a forecasting method that considers all these factors and predicts users' behavior and initial SOC through statistical patterns. Machine learning techniques are employed to develop a battery-charging behavioral model, which accounts for different EV models. The results demonstrate significant differences in power demand across various parking scenarios.
Article
Computer Science, Information Systems
Riccardo Barbone, Riccardo Mandrioli, Mattia Ricco, Gabriele Grandi
Summary: The reduction of climate-changing emissions is crucial, especially in urban areas. Decarbonizing the transport sector, particularly through the integration of renewable energy sources and the use of full-electric fleets in trolleybus systems, is essential. A newly developed trolleybus network simulator with modular catenary model and versatile graphical user interface proves to have high precision and low processing effort, filling the gaps of earlier simulation tools. The simulator demonstrates satisfactory results in terms of convergence.
Article
Engineering, Electrical & Electronic
Rudolf Francesco Paternost, Riccardo Mandrioli, Riccardo Barbone, Mattia Ricco, Vincenzo Cirimele, Gabriele Grandi
Summary: This study improves the simulation model of a trolleybus grid using a data-driven approach and analyzes the variation in vehicle weight behavior with measured data. The daily operation of a trolleybus feeding section is simulated and compared with measurements, demonstrating the feasibility of the simulation tool.
WORLD ELECTRIC VEHICLE JOURNAL
(2022)
