Article
Engineering, Electrical & Electronic
Ruizhi He, Yu Jin, Weiyang Hou, Derong Luo, Shoudao Huang
Summary: This paper proposes a capacitor overvoltage elimination strategy for reduced-voltage-sensor-based MMC, which involves pre-measurement and in-process measurement to obtain the actual value of submodule capacitor voltage for correct sorting and discharging of submodules with excessively high voltage or overvoltage trends. Both simulation and experimental results demonstrate the effectiveness of the proposal, even in the presence of capacitance parameter deviation.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Piyush Kant, Bhim Singh
Summary: A new modular transformer-based 36-pulse ac-dc converter is proposed in this work to improve power quality in a medium voltage induction motor drive, with a 9-level cascaded H-bridge inverter applied on the drive side for enhanced performance. The paper also presents a modified model reference adaptive system for sensorless vector control, and utilizes a nearest level modulation scheme to operate a 9-level inverter at fundamental frequency over the entire speed range of the induction motor drive, confirmed through simulation and experimental results.
IET POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Abraham Marquez Alcaide, Youngjong Ko, Markus Andresen, Jose I. Leon, Sergio Vazquez, Vito Giuseppe Monopoli, Giampaolo Buticchi, Marco Liserre, Leopoldo G. Franquelo
Summary: Interleaved dc-dc converters are widely used in various applications due to their inherent power sharing and reduced output waveform ripple. However, in some cases such as multistring photovoltaic converters, the mismatched power management among power modules can lead to unbalanced operation and degraded harmonic response. This directly affects the lifetime of the dc-link capacitor, a critical component of the system. This article proposes a variable-angle phase displacement angle to mitigate this issue and extend the converter's lifetime.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Review
Chemistry, Multidisciplinary
Salah Alatai, Mohamed Salem, Dahaman Ishak, Himadry Shekhar Das, Mohammad Alhuyi Nazari, Ali Bughneda, Mohamad Kamarol
Summary: Integrated bidirectional resonant DC-DC converters and multilevel inverters are expected to be well-suited and highly demanded in various applications in the near future. More studies are necessary for achieving a perfect level of reducing losses and components due to their highlighted merits.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Tiago de Sa Ferreira, Guilherme Monteiro de Rezende, Lenin Martins Ferreira Morais, Victor Flores Mendes, Didier Flumian, Jeremi Regnier, Thierry A. Meynard
Summary: The series and parallel multicell converters offer advantages in efficiency, power density, and dynamic response. Interleaving control patterns and utilizing a multi-rate modulation strategy can improve the dynamic response speed.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Takayuki Nakamura, Toshiyuki Murakami
Summary: This study focuses on the loss of inductors in a multiphase bidirectional chopper, specifically the loss due to ripple current. The researchers conducted experiments to clarify the loss caused by ripple current and demonstrated that it is equivalent to the no-load loss in the chopper. The study also deduced an analytical solution for determining the optimal number of phases based on load current, and applied it to an actual onboard bidirectional chopper.
Article
Computer Science, Information Systems
Julio C. Rosas-Caro, Jesus E. Valdez-Resendiz, Gerardo Escobar, Francisco Beltran-Carbajal
Summary: DC-DC converters are important in key applications like renewable energy generation. This article introduces a new step-up DC-DC converter topology with advantages including a larger relation of duty cycle vs. voltage gain, smaller inductor current and inductance, and reduced stored energy.
Article
Computer Science, Information Systems
Jingyang Fang
Summary: The article proposes a unified modeling and control methodology for lattice converters, satisfying key control objectives and introducing novel topologies to complement state-of-the-art options. Simulation and experimental results confirm the effectiveness and superiority of the proposed methodology and converters.
Article
Automation & Control Systems
Abraham M. Alcaide, Pablo Poblete, Sergio Vazquez, Ricardo P. Aguilera, Jose I. Leon, Samir Kouro, Leopoldo G. Franquelo
Summary: This article proposes a feed-forward compensation technique to address the challenges of short sampling time and unbalanced operational conditions in the operation of multilevel cascaded H-bridge (CHB) converters. Experimental results demonstrate the superior performance of the proposed strategy.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Ahmed S. Hussein, Amer M. Y. M. Ghias
Summary: This article presents the modulation and operating limits of the modified cascaded multioutput multilevel converter. A phase-disposition pulsewidth modulation strategy is developed to minimize device switching. The number of device transitions is evaluated using a Hamming distance-based cost function, and the optimal state is identified. The operating limits of the converter are analyzed to ensure safe and valid operation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Salvador Alepuz, Sergio Busquets-Monge, Joan Nicolas-Apruzzese, Alber Filba-Martinez, Josep Bordonau, Xibo Yuan, Samir Kouro
Summary: This paper provides a summary of neutral-point-clamped multilevel converters, focusing on the issue of capacitor voltage balance. Various methods for managing the capacitor voltage balance are presented and discussed, including operation in different regions, with different numbers of phases and levels. The techniques for capacitor voltage balance in DC-DC conversion are also discussed. The paper concludes with application examples demonstrating the benefits of the presented techniques.
Article
Computer Science, Information Systems
Zhiting Mei, Jingyang Fang, Stefan Goetz
Summary: This article discusses two problems faced by lattice converters and proposes corresponding solutions. Firstly, it optimizes the efficiency of a given lattice converter by controlling the on/off states of H-bridge submodules. Secondly, it introduces a method to determine the voltage at each node of the converter to meet output voltage and current requirements. The article provides control methods for different sizes of lattice converters using graph theory and validates them with simulation results. The methodologies and algorithms described in the article are important for further design and improvement of efficient and easy-to-control lattice converters.
Article
Computer Science, Information Systems
Rahim Samanbakhsh, Federico Martin Ibanez, Peyman Koohi, Fernando Martin
Summary: This paper introduces a new structure of a multilevel inverter with fewer components, suitable for renewable energy sources and industrial loads applications. The inverter has three unequal input sources and ten switches, capable of generating a 15-level output voltage, which can be further increased by cascade connection. The main feature of this inverter is the very low harmonic distortion at the output voltage and current, achieved through a control method based on the nearest level control method for generating high-quality output voltage.
Review
Engineering, Electrical & Electronic
Hussein Mahdi, Bjarte Hoff, Trond Ostrem
Summary: This article provides a comprehensive review of the converter topologies used in shore-to-ship and shipboard power systems, aiming to anticipate future trends and challenges and stimulate research on more efficient and reliable electric ships.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Mohamed Tamasas Elrais, Md Safayatullah, Issa Batarseh
Summary: This article introduces a generalized gallium nitride (GaN)-based modular multiport multilevel flying capacitor architecture, which fits various applications by using the attractive flying capacitor multilevel (FCML) design and the full-bridge unfolding circuit. Two example prototypes, a three-port and a four-port, have verified this architecture's potential. The experimental results show high efficiency, power density, and compact size, making it a promising design approach for various applications.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Xing Liu, Lin Qiu, Jose Rodriguez, Wenjie Wu, Jien Ma, Zhouhua Peng, Dan Wang, Youtong Fang
Summary: In this letter, a neural predictor-based dynamic surface predictive control framework is proposed, which combines the advantages of adaptive dynamic surface control and finite control-set model predictive control. The estimation of neural predictor is used to identify the system dynamics and unknown uncertainties, avoiding the issue of complexity explosion in classical back-stepping control. The proposed solution explicitly deals with model uncertainties and disturbances, leading to a simpler adaptive predictive control solution.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Mohamad Amiri, Davood Arab Khaburi, Saeed Heshmatian, Mahyar Khosravi, Jose Rodriguez, Cristian Garcia Penailillo
Summary: In this paper, an extended-horizon predictive torque control method is proposed with computationally tractable implementation. The method reduces computational burden and optimizes control strategy, resulting in efficient computation and superior performance.
INTERNATIONAL JOURNAL OF CONTROL
(2023)
Article
Automation & Control Systems
Bo Long, PengJie Lu, Danny Zhan, Xin Lu, Jose Rodriguez, Josep M. Guerrero, Kil To Chong
Summary: This paper proposes a Fuzzy-FOSMC dual loop current controller for a reduced-order three-phase LCL-type grid-connected converter. The introduced fractional-order term can suppress chattering, and the fuzzy controller adjusts the fractional-order of FOSMC to improve system performance. The inner loop is implemented using a Fuzzy-FOSMC controller to ensure current tracking.
Article
Engineering, Electrical & Electronic
Jiusi Zhang, Jilun Tian, Minglei Li, Jose Ignaclo Leon, Leopoldo Garcia Franquelo, Hao Luo, Shen Yin
Summary: This article proposes a novel parallel hybrid neural network, consisting of 1-D convolutional neural network (1-DCNN) and bidirectional gated recurrent unit (BiGRU), for predicting remaining useful life (RUL). The spatial and temporal information from historical data is parallel extracted using 1-DCNN and BiGRU, respectively, and the trained network can be used for real-time RUL prediction. Experimental results demonstrate that the proposed parallel hybrid network effectively predicts RUL and outperforms existing literature.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Mohammed A. Alharbi, Abraham M. Alcaide, Mohamed Dahidah, P. Montero-Robina, Salaheddine Ethni, Volker Pickert, Jose Leon
Summary: Fast DC chargers play a crucial role in the widespread adoption of electric vehicles by reducing charging time. However, the increasing variety in battery technology poses challenges for charger design. This article proposes a rotating phase-shedding control technique to evenly distribute the thermal stress among all phases, improving system reliability and efficiency. Through simulations and experiments, the proposed approach is shown to achieve a better thermal damage distribution compared to conventional phase shedding, ultimately extending the system's lifetime.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Sadegh Eslahi, Sadegh Vaez-Zadeh, Jose Rodriguez
Summary: In this article, a sensorless combined control method is proposed to improve the resilience of converter-based renewable energy microgrids integrated into power grids. The method not only enhances the resilience of grid-connected converters, but also improves power quality. It uses a single control system to deal with unbalanced grid conditions, severe load changes, and short circuit faults.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Bo Long, XingYu Li, Jose Rodriguez, Josep M. Guerrero, Kil To Chong
Summary: In this study, a novel fractional-order model predictive controller (FOMPC) is proposed for a fractional-order virtual synchronous generator controller (FOVSG) to alleviate the output power oscillation and achieve an optimal frequency and voltage regulation for an islanded microgrid. Hardware-in-the-loop (HIL) experiments were carried out to demonstrate the superiority of FOMPC-FOVSG over existing VSG techniques under several scenarios.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Haotian Xie, Fengxiang Wang, Qing Chen, Yingjie He, Jose Rodriguez, Ralph Kennel
Summary: This article proposes a computationally efficient predictive current control (PCC) combined with an extension of a finite set using current derivative projection to solve the challenges experienced by finite control set PCC (FCS-PCC), that is, unsatisfied steady-state performance and high computational burden. The objective function in PCC is rearranged as the quadratic Euclidean norm of the derivative deviation to minimize the deviation between the selected and desired current derivative. The LS method is used to optimize the optimal stator current derivatives in the consecutive sampling intervals combined with their duty cycles.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Chenwei Ma, Jose Rodriguez, Cristian Garcia, Frederik De Belie
Summary: In this article, a novel reference current slope-based modulated model-free predictive control (MFPC) is proposed to address the high current ripple and system parameter dependence problem of conventional model-based predictive current control (MBPCC). The reference current slope is obtained based on the current deadbeat solution, and a reduced amount of active voltage vectors can be determined according to the reference current slope and the current slopes for the possible voltage vectors. A two-vector modulation strategy is introduced to reduce current ripples, and the current slopes for the possible voltage vectors are obtained in a model-free manner based on online measured data only.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yunfei Yin, Lei Liu, Sergio Vazquez, Ruiqi Xu, Zejiao Dong, Jianxing Liu, Jose I. Leon, Ligang Wu, Leopoldo G. Franquelo
Summary: This article proposes an adaptive optimal control scheme to minimize the effect of disturbances and uncertainties of permanent magnet synchronous motor (PMSM). An adaptive speed controller is designed in the speed regulation loop, which regulates the speed perfectly and is robust against parameter variations and external disturbances. The stability of the proposed speed controller is proven using Lyapunov theory. A PI-type optimal current controller is established in the inner control loop to achieve current tracking and limitation, and the proposed controller can balance between control input magnitude and current tracking error.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Engineering, Electrical & Electronic
Bo Long, Jiahao Zhang, Xingyu Li, Jose Rodriguez, Josep M. Guerrero, Yunlong Teng, Kil To Chong
Summary: This article proposes a model-free predictive control method with multiobjective optimization for two parallel three-level T-type rectifiers. It does not rely on precise circuit parameters and models, and can achieve multiobjective optimization control without weighting factors.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yang Xiao, Yong Yang, Chunhua Liu, Jose Rodriguez
Summary: In this study, a novel wireless motor system called the wireless ultrasonic motor (WUM) system is proposed and analyzed. By combining wireless power transfer and ultrasonic motor technology, the system addresses the issues of complex controllers and converters, regular maintenance, and output ripple. Matching inductors and optimized coil structures are designed to improve power quality and filter harmonic voltages.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Proceedings Paper
Energy & Fuels
Jorge Rodas, Osvaldo Gonzalez, Margarita Norambuena, Jesus Doval-Gandoy, Oriol Gomis-Bellmunt, Raul Gregor, Magno Ayala, Jose Rodriguez, Carlos Romero
Summary: Model predictive control is a promising technique for multiphase induction machines, offering the advantage of including various constraints through the cost function. However, tuning the weighting factors to achieve multiple control objectives is a challenging task. This paper presents a sequential model predictive torque control approach for a six-phase induction machine that eliminates the need for weighting factors. Simulation studies demonstrate the effectiveness of this proposal in achieving accurate reference tracking for torque, flux, and stator alpha - ss and x - y currents.
2023 IEEE CONFERENCE ON POWER ELECTRONICS AND RENEWABLE ENERGY, CPERE
(2023)
Proceedings Paper
Energy & Fuels
Guillermo Huerta, Margarita Norambuena, Jose Rodriguez
Summary: This paper proposes a new method for controlling permanent magnet synchronous machines, considering both with and without field weakening. The method utilizes Sequential Model Predictive Control using high-frequency injection and reference generation from the analytical solution of the Maximum Torque Per Ampere curve. Results demonstrate reduced torque ripple and current total harmonic distortion compared to the Field Oriented Control technique under nominal conditions.
2023 IEEE CONFERENCE ON POWER ELECTRONICS AND RENEWABLE ENERGY, CPERE
(2023)
Proceedings Paper
Energy & Fuels
Mokhtar Aly, Samir Kouro, Fernanda Carnielutti, Margarita Norambuena, Eltaib Abdeen D. Ibrahim, Cristian Garcia, Oleksandr Husev, Jose Rodriguez
Summary: This paper addresses the integration and control issues of renewable energy systems in applications with wide range of voltage levels, multiple sources integration, and different grid connections. A new common ground power converter structure is proposed for photovoltaic (PV) integration with universal single-phase AC/DC microgrids. Model predictive control (MPC) is applied for controlling the proposed topology at both AC and DC microgrid connections. The proposed topology reduces component structure and the MPC method achieves fast response with controlling multiple objectives using a single objective function. Simulation results with various connection types, current stepping, DC-link voltage changes, and reactive power support are provided.
2023 IEEE CONFERENCE ON POWER ELECTRONICS AND RENEWABLE ENERGY, CPERE
(2023)
