Article
Engineering, Electrical & Electronic
Bishwajyoti Purkayastha, Tanmoy Bhattacharya
Summary: This article proposes a scheme to use time-multiplexing for transmitting the sensed data of a modular multilevel converter. The mathematical analysis of the data transmission system and its influence on closed-loop performance is studied, and the proposed scheme is experimentally verified in the laboratory.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Zhengxuan Li, Lifeng Gou, Qiang Song, Bojin Tang, Biao Zhao, Leiyan Han, Kailun Wang
Summary: In this article, a new operation mode based on variable dc voltages is proposed for full-bridge submodule-based modular multilevel converter (FB-MMC) or hybrid MMC (HYB-MMC) to reduce the arm energy fluctuations and submodule capacitance. Theoretical analysis shows that energy fluctuation and submodule capacitance can be reduced by 30%-40% and valve cost can be reduced by 13%. Economic and technical comparison results demonstrate that the proposed approach has similar reduction effects on capacitance and valve cost but with fewer technical limits. Simulation and experimental results validate the analysis.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Felipe Donoso, Roberto Cardenas, Mauricio Espinoza, Jon Clare, Andres Mora, Alan Watson
Summary: A new nested closed-loop control algorithm is proposed to address the capacitor voltage balance issue between FBSM and HBSMs in a hybrid modular multilevel converter. By minimizing the required compensating currents using an optimizing algorithm, better control results are achieved.
Article
Engineering, Electrical & Electronic
Ruizhi He, Dong Liu, Remus Teodorescu, Qi Zhang, Weiyang Hou, Zhe Chen
Summary: This paper introduces a NLM-based submodule capacitor voltage measuring technology for a MMC with reduced sensors and proposes an improved algorithm to reduce measuring errors and improve measurement accuracy. Simulation and experimental results validate the feasibility and effectiveness of the proposed voltage measuring algorithm.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Fujin Deng, Jifeng Zhao, Chengkai Liu, Zheng Wang, Xu Cai, Frede Blaabjerg
Summary: This article proposes a variable frequency control strategy for balancing the temperature distribution among three phases of an MMC in the presence of unbalanced grid voltages. The proposed control effectively improves the reliability of the MMC.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Duc Dung Le, Dong-Choon Lee
Summary: This article proposes a method to determine the average submodule capacitor voltage in a flying-capacitor modular multilevel converter (FC-MMC) in order to reduce current stresses and improve total harmonic distortion (THD) of the phase voltages. The method introduces higher ripple in the low-frequency voltage by partially alleviating the low-frequency power fluctuation, and determines the average SM capacitor voltage based on this ripple value. This allows for a decrease in the ac-circulating current amplitude and a reduction in current stresses in switching devices, inductors, and flying capacitors. Additionally, it improves the THD of the phase voltage in low-speed operation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
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
Engineering, Electrical & Electronic
Shuguang Song, Jinjun Liu, Xingxing Chen
Summary: This article introduces a DC-link voltage control method without actual voltage measurement by regulating total capacitor voltage and introducing compensation signal. The proposed method enhances system reliability and stability.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jianzhong Xu, Junxin Wang, Yukun Yang, Jinan Wang, Gen Li
Summary: This paper proposes an optimal dual harmonic injection strategy for hybrid modular multilevel converters (MMCs), which can suppress the submodule capacitor voltage ripples under unbalanced grid voltage conditions, reducing the volume and cost of the converters.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Automation & Control Systems
Xiaoyun Feng, Shunfeng Yang, Shun Liu, Wensheng Song
Summary: This study proposes two round-robin transmission modes with voltage-ripple-filtering capability to significantly reduce the communication burden of capacitor voltages in MMC systems while maintaining control performance. These transmission modes are designed to filter out specific harmonics and eliminate the low-pass filter in the voltage control loop. The feasibility of the capacitor voltage transmission modes is confirmed through simulation and experimental results.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Zhen Wang, Li Peng
Summary: The proposed method of capacitor voltage estimation based on grouping measurement improves the accuracy of voltage estimation by periodically grouping and updating SM capacitance, meanwhile, monitoring and locating faults in capacitors enhances the reliability and seamless operation of MMC.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Chengkai Liu, Fujin Deng, Jianzhong Zhang, Xu Cai, Zhe Chen, Frede Blaabjerg
Summary: A controllable submodule (SM) based on a normally-on silicon carbide (SiC) junction field-effect transistor is proposed to reduce the power loss on bleeding resistor and improve the efficiency of modular multilevel converters (MMCs).
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Feng Xu, Xiaoming Huang, Yi Lu, Peng Qiu, Chengyu Lu, Chao Ding
Summary: This paper introduces a hybrid DC system called LCC-HY-MMC, proposes a complete shutdown control strategy for the shutdown stage, and verifies the effectiveness of the method through a digital simulation model.
Article
Automation & Control Systems
Qian Xiao, Linglin Chen, Yu Jin, Yunfei Mu, Allan Fagner Cupertino, Hongjie Jia, Yousef Neyshabouri, Tomislav Dragicevic, Remus Teodorescu
Summary: An improved fault-tolerant control strategy is proposed for CHB-based STATCOM under SM faults, utilizing healthy switches to generate more output voltage levels and increase attainable balanced line-to-line voltage, especially when different fault types exist simultaneously.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Chengkai Liu, Fujin Deng, Qingsong Wang, Yanbo Wang, Frede Blaabjerg, Zheng Wang
Summary: A double half-bridge submodule-based MMC design is proposed in this letter, requiring only half the number of sensors to estimate capacitor voltages compared to traditional half-bridge submodule-based MMC designs, which proves to be more cost-effective. Simulation and experimental results confirm the effectiveness of the proposed method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Siba Kumar Patro, Anshuman Shukla
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2020)
Article
Engineering, Multidisciplinary
Siba Kumar Patro, Anshuman Shukla
Summary: This article discusses the modular multilevel converter (MMC) and the parallel hybrid converter (PHC), exploring their advantages and limitations. The PHC, as a promising alternative for high power applications, reduces the size of capacitors but faces operational constraints. Various advanced control methods and derived topologies have been proposed in literature to address the shortcomings of the PHC.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Review
Engineering, Electrical & Electronic
Panagiotis Bakas, Yuhei Okazaki, Anshuman Shukla, Siba Kumar Patro, Kalle Ilves, Frans Dijkhuizen, Alireza Nami
Summary: Hybrid multilevel converters using bidirectional thyristors and IGBTs have gained interest for HVdc applications. This article presents a classification and derivation methods for these converters, suggesting the most suitable topology for different configurations based on comparisons of existing and new hybrid converters.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Satish Belkhode, Anshuman Shukla, Suryanarayana Doolla
Summary: The article proposes a three-level enhanced hybrid ANPC (E-HANPC) structure, which optimally utilizes Si insulated gate bipolar transistors (IGBTs) and SiC MOSFETs to achieve a high-power-density, highly efficient, low-cost system. A dedicated modulation scheme reduces conduction and switching losses, leading to higher efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Mahendra B. Ghat, Siba Kumar Patro, Anshuman Shukla
Summary: A new hybrid-legs bridge converter (HLBC) is introduced as an alternative to the modular multilevel converter (MMC) for high-voltage direct current (HVdc) applications. The HLBC is a hybrid of a two-level converter and an MMC, with simplified structure, increased power density, reduced component count, and DC fault-tolerant capability. Verification of the proposed converter's feasibility in HVdc systems is conducted through simulations and experiments.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Siba Kumar Patro, Anshuman Shukla, Mahendra B. Ghat
Summary: This article proposes a compact, efficient, and dc fault-tolerant hybrid series converter (HSC) topology for high-voltage direct current applications, with a new control technique for enhanced performance. The evaluation shows superior capabilities of the HSC, both in terms of range and fault tolerance. The study also includes loss calculation, comparison with existing topologies, and experimental validation of a three-phase 13-level HSC setup.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Govind Avinash Reddy, Anshuman Shukla
Summary: This article proposes a circulating current optimization control scheme for MMC, which reduces arm current peak value and improves power handling capacity. The effectiveness of the proposed scheme in reducing power losses and enhancing MMC performance is demonstrated through simulations and experimental studies.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Siba Kumar Patro, Anshuman Shukla
Summary: The paper introduces a novel topology named TAMBC, which achieves higher efficiency, reduced capacitor size, and enhanced efficiency through control techniques. TAMBC-HVDC systems operate over a wide range and have the ability to ride-through ac faults and provide independent active and reactive power control.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Automation & Control Systems
Veer Karan Goyal, Anshuman Shukla
Summary: The current-fed dual-inductor resonant full-bridge dc-dc isolated boost converter is suitable for applications that demand wide input voltage and load ranges. It can boost variable low voltage and interface it to a high-voltage dc-link efficiently with soft-switching and load-independent design, making it suitable for wide input voltage range applications.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Govind Avinash Reddy, Anshuman Shukla
Summary: This article discusses the limitations of the modular multilevel converter (MMC), namely the circulating current and the large energy storage requirement. It proposes two control schemes based on utilizing the instantaneous voltage signals of the submodule capacitors in MMC to suppress the circulating current and reduce the energy storage requirement. These schemes increase reliability and reduce cost and complexity.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Satish Belkhode, Poornachandra Rao, Anshuman Shukla, Suryanarayana Doolla
Summary: This article investigates the impact of silicon-carbide switches on the performance of NPC and MMC converters for medium-voltage applications. Two different cases of the circulating current control schemes are considered for the MMC configuration. The experimental prototypes of three-level configurations for both topologies are developed to compare and analyze their performances. Furthermore, the device loss characteristics of the switching devices are obtained using the double pulse test setup.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Editorial Material
Engineering, Electrical & Electronic
Zhengming Zhao, Qiang Li, Anshuman Shukla, Mario Pacas, Mor Mordechai Peretz, Xu She, Yam Siwakoti, Mahesh Illindala, Mark Dehong Xu, Santanu Kapat, Yuko Hirase, Gerry Moschopoulos, Massimo Bongiorno, Yilmaz Sozer
Summary: The associate editors of the Journal of Emerging and Selected Topics in Power Electronics play a crucial role in the publication process, with their efforts being extremely important for the production of the journal and its significance for readers.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Ibhan Chand Rath, Siba Kumar Patro, Anshuman Shukla
Summary: The PHC-STATCOM is a unique topology that eliminates the need for a dc-filter inductor and offers greater flexibility, with good capacitor balancing performance and the ability to operate under both balanced and unbalanced grid conditions.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Veer Karan Goyal, Anshuman Shukla
Summary: A two-stage hybrid isolated dc-dc boost converter for high power and wide input voltage range applications is proposed. The comparison among different converter topologies indicates that the proposed converter is superior with input voltage variation greater than +/- 20%. Detailed design details and theoretical analysis are provided.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
