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)
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
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
Energy & Fuels
Hector R. Robles-Campos, Fernando Mancilla-David
Summary: Modular multilevel converters, especially the Hexverter, are crucial in medium-to-high-power applications for connecting three-phase AC systems operating at different frequencies. This study focuses on the Hexverter system and evaluates its performance under different modulation techniques.
Article
Engineering, Electrical & Electronic
Javad Ebrahimi, Hamidreza Karshenas, Suzan Eren, Alireza Bakhshai
Summary: This article proposes a generalized decoupled SVM scheme for FC-based multilevel converters, which can effectively achieve capacitor voltage balancing and reduce computational complexity. By using an overall priority index to determine the switching state, this method demonstrates effectiveness in regulating FC voltages.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Zhijie Liu, Ke-Jun Li, Zhonglin Guo, Jinyu Wang, Jianhang Qian
Summary: Modulation ratio is an important index for power converters, but its application in modular multilevel converters has problems and cannot accurately reflect their modulation characteristics.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
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
Automation & Control Systems
Chengkai Liu, Fujin Deng, Qiang Yu, Yanbo Wang, Frede Blaabjerg, Xu Cai
Summary: This article proposes a submodule (SM) capacitance monitoring strategy for the MMC, where the fundamental frequency components of the SM capacitor voltage and current are extracted to estimate the SM capacitance based on reference, simplifying implementation and calculation, avoiding control limitations and heavy communication burden, and increasing accuracy. Simulation and experimental studies confirm the effectiveness of the proposed strategy.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Saher Albatran, Ahmad S. Allabadi, Abdel Rahman Al Khalaileh, Yong Fu
Summary: This article proposes two adaptive optimal third harmonic injection-PWM schemes to minimize voltage total harmonic distortion and maximize DC bus utilization. Through simulation evaluations and experimental comparisons, the superior performances of the proposed schemes over other PWM schemes have been validated.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Weiwei Li, Xueguang Zhang, Dianguo Xu
Summary: This article develops an integrated zero common-mode voltage (ZCMV) modulation algorithm that guarantees better current quality and eliminates common-mode voltage when dual-parallel neutral-point-clamped (NPC) inverters are treated as an integrated system. Specially designed switching sequences are used to maintain a balanced neutral point and zero averaged circulating current, ensuring the normal function of the parallel NPC inverters. Experimental results verify the effectiveness of the integrated modulation in eliminating common-mode voltage and reducing output current distortion.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Khoa Dang Pham, Nho-Van Nguyen
Summary: This article aims to reduce the switching power loss by proposing two pulsewidth modulation schemes and conducting simulation and experimental verification. The results show that these two schemes outperform the conventional one in terms of switching loss performance and harmonic performance.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Tianfu Sun, Songling Zhu, Linghui Long, Chaohui Liu, Liang Xia, Xueqiang Zhang
Summary: This article analyzes the modulation capability of the third-harmonic component in five-phase motor drive systems and proposes an improved method. The effectiveness of the proposed algorithm is proved through experiments.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Xi Liu, Chenghui Zhang, Xiangyang Xing, Rui Zhang, Tong Liu, Qicai Ren
Summary: This article presents an improved carrier-based modulation (ICBM) for parallel converters to meet the high current quality and low leakage current requirements in high power rating photovoltaic applications. By injecting a proper zero-sequence modulation wave into the three-phase modulation waves, a low total current ripple is achieved based on the root mean square value analysis of the output current ripple. The initial phase shift angles for the carriers in each converter are modified to minimize the excitation source of leakage current without affecting the quality of total output current. The proposed ICBM is also extended to parallel multilevel converters according to the vector shift principle, enabling simultaneous total current ripple reduction and leakage current attenuation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Ze Wang, Zhen He, Chao Gao
Summary: This paper investigates the influences of low-frequency modulation on circuit operation and proposes corresponding solutions, classified as harmonic overlap effect. A comprehensive summary of the impacts and solutions on typical high power converters is drawn, with design rules proposed for multilevel voltage source converters at low switching frequency.
Article
Engineering, Electrical & Electronic
Minghao Chen, Decun Niu, Lei Zhang, Ximei Liu
Summary: This article proposes an asymmetrical switching pattern to eliminate common-mode voltage in multilevel converters while reducing switching loss. A simple sawtooth-carrier-based pulsewidth modulation scheme is proposed to implement this pattern without complicated computation. The effectiveness of the proposed method is demonstrated through simulations and experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
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
Yong Yang, Yang Xiao, Mingdi Fan, Kaixin Wang, Xinan Zhang, Jiefeng Hu, Gang Fang, Weibo Zeng, Sergio Vazquez, Jose Rodriguez
Summary: This article proposes a novel continuous control set model predictive control (CCS-MPC) algorithm for an LC-filtered three-phase three-level four-wire voltage-source inverter (3P-4W-3L-VSI). The algorithm achieves independent control of each phase of the 3P-4W-3L-VSI under various unbalanced load conditions, demonstrating superior performance under unbalanced loads. Unlike conventional MPC methods, CCS-MPC achieves fixed switching frequency, simplifying the design of LC filters. Additionally, dc offsets are introduced to effectively balance the neutral-point voltage of the 3P-4W-3L-VSI. Experimental results confirm the effectiveness of the proposed MPC algorithm.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yuan Gao, Songda Wang, Habibu Hussaini, Tao Yang, Tomislav Dragicevic, Serhiy Bozhko, Patrick Wheeler, Sergio Vazquez
Summary: This article proposes a novel application method, inverse application of artificial intelligence (IAAI) for the control of power electronic converter systems. The method relies on a data-driven process with no need for optimization or substantial derivations. It uses artificial intelligence to provide feasible control coefficients/references for the power converter control, rather than building a new controller.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Eduardo Zafra, Sergio Vazquez, Abraham M. Alcaide, Emilia Perez Martin, Leopoldo G. Franquelo, Jose I. Leon
Summary: In finite control set model predictive control strategies, extending the prediction horizon length improves closed-loop performance, but at the cost of increased computational complexity. By transforming the problem into an equivalent box-constrained integer least-squares formulation, sphere decoding algorithms (SDA) can efficiently solve the problem. In this study, a hybrid SDA, combining the merits of K-best SDA and conventional SDA, is proposed to increase optimality likelihood and improve control performance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
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)
Article
Automation & Control Systems
Abraham Marquez Alcaide, Vito Giuseppe Monopoli, Eduardo Zafra, Giampaolo Buticchi, Jose I. Leon, Sergio Vazquez, Marco Liserre, Leopoldo Garcia Franquelo
Summary: This article analyzes the usage of a generalized PWM method with three independent carriers, evaluating the carrier phase-displacement angles to reduce the total harmonic distortion (THD) of common-mode voltage (CMV), dc-link capacitor current, and phase currents. These targets are difficult to achieve simultaneously, so a cost function is used to find a suitable solution that balances all the targets. The proposed method has been tested in a laboratory prototype and demonstrated superior performance.
IEEE TRANSACTIONS ON INDUSTRIAL 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
Jiusi Zhang, Jilun Tian, Abraham M. Alcaide, Jose I. Leon, Sergio Vazquez, Leopoldo G. Franquelo, Hao Luo, Shen Yin
Summary: This article proposes a lifetime extension approach based on the Levenberg-Marquardt back propagation neural network (LM-BPNN) and power routing of interleaved dc-dc boost conversion systems. The LM-BPNN model is constructed based on the voltage, current, and temperature data generated by the system. Numerical simulation results show that the proposed approach can extend the overall system lifetime. Furthermore, an experimental setup is constructed to verify the proposed approach, which is of great significance for predictive maintenance in the industrial system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Eduardo Zafra, Sergio Vazquez, Tobias Geyer, Ricardo P. Aguilera, Leopoldo G. Franquelo
Summary: Finite control set model predictive control (FCS-MPC) is a popular control method for power conversion systems, and the use of long prediction horizons has been shown to improve performance in terms of stability, distortions, and losses. However, the computational burden poses challenges for practical implementation. A solution is to formulate the control problem as an integer least-squares optimization problem, with the sphere decoding algorithm (SDA) being the most popular choice. This article discusses alternative solutions beyond SDA and presents future trends and challenges in this field.
IEEE OPEN JOURNAL OF THE INDUSTRIAL ELECTRONICS SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Xiaoning Shen, Chengwei Wu, Zhuang Liu, Yijie Wang, Jose I. Leon, Jianxing Liu, Leopoldo G. Franquelo
Summary: In this article, a two-stage design approach combining an adaptive-gain GSTA and a modified STO is proposed for NPC converters. The dynamic and steady-state performance of the converter is improved by applying the adaptive-gain GSTA in the power tracking and voltage regulation loops. The modified STO is used to reject external disturbances. Experimental results validate the effectiveness of the proposed method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Matias Aguirre, Sergio Vazquez, Abraham Marquez Alcaide, Ramon Portillo, Samir Kouro, Jose Ignacio Leon, Leopoldo Garcia Franquelo
Summary: This article investigates the switching phase regulation for interleaved dc/dc power converters. By extending PCA-FCS-MPC to achieve phase regulation, a switching pattern similar to that of PWM techniques is achieved while preserving the advantages of FCS-MPC. Simulation and experimental results confirm the effectiveness of the proposed method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Eduardo Zafra, Sergio Vazquez, Abraham M. Alcaide, Jose I. Leon, Leopoldo G. Franquelo
Summary: This paper proposes an improvement to the parallel sphere decoding algorithm by allowing each parallel sphere decoder block to explore a region of the search space following a different search pattern, increasing the diversity of candidates and enhancing the average optimality of the algorithm.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Freddy Flores-Bahamonde, Hugues Renaudineau, Ana M. Llor, Andrii Chub, Samir Kouro
IEEE INDUSTRIAL ELECTRONICS MAGAZINE
(2023)
