Article
Engineering, Electrical & Electronic
Jinliang Huang, Kaijie Li, Yuanmao Ye, Xiaolin Wang
Summary: A new clamp-double-SM (CDSM) based MMC topology is proposed in this article, which achieves self-balanced outputs and reduces the use of complex balancing algorithms. By adding auxiliary balance branches, capacitor voltages among different SMs are also self-balanced, reducing the number of components and costs.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xiao Li, Rui Liu, Ziwei Ke, Jianyu Pan, Boxue Hu, Risha Na, Longya Xu, Jin Wang
Summary: This article presents two simple strategies for reducing the output dv/dt of modular multilevel converters by coordinating the switching transients of the submodules. The first method involves adding a delay time between the switching transients of two submodules, which are switched simultaneously in regular strategies. The second method injects a reverse dv/dt to the converter's output by switching redundant submodules. Both methods do not affect the switching speeds of the semiconductor devices and require no additional hardware components. Circuit analysis and simulation results support the effectiveness of the proposed methods.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Hao Tian, Mingzhe Wu, Yun Wei Li
Summary: In this article, a precharging method for floating capacitors in seven-level hybrid clamped converters is proposed. By using specific switching states and selection schemes, the inrush current and voltage stress can be controlled without relying on dedicated power supplies, achieving safe precharging.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Haozhe Jin, Wu Chen, Yeyuan Xie, Liangcai Shu, Yutao Xu
Summary: This article proposes an optimized asymmetric trapezoidal wave (ATW) modulation scheme for a modular multilevel resonant dc/dc converter (MMRDC) to reduce current stress over wide load and voltage ranges. The optimized operating point of MMRDC is derived based on the soft switching characteristic and reactive current analysis, considering low current stress and zero voltage switching constraint. The experimental results on a 4 kW MMRDC prototype verify the correctness and effectiveness of the analysis and the optimized ATW modulation scheme.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Dongdong Chen, Long Xiao, Wanqing Song
Summary: This paper introduces a modular cascaded battery energy storage system and establishes a mathematical model for both the AC and DC sides of the system, proposing a corresponding control strategy. To balance switching times and output harmonics, a new hybrid modulation strategy (NHPWM) is proposed, combining the characteristics of NLM and CPS-PWM commonly used in traditional cascaded topologies. The paper also presents a calculation method based on double Fourier series expansion theory to derive the analytical solution of NHPWM harmonic distribution. Simulation and experimental results verify the correctness and effectiveness of the proposed modulation strategy and theoretical calculation, showing clear advantages over traditional HPWM and CPS-PWM in terms of harmonics and efficiency.
Article
Engineering, Electrical & Electronic
Govind Avinash Reddy, Anshuman Shukla
Summary: In this article, a new enhanced modular multilevel converter (EMMC) is introduced, which addresses the drawbacks of the conventional modular multilevel converters (MMC). The EMMC, based on a new submodule (SM) structure, is fully modular and requires fewer switches and capacitors. It possesses the features of reduced energy-storage requirement and dc fault-tolerant capability.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jiaxun Teng, Xiaofeng Sun, Xinlei Liu, Wei Zhao, Xin Li
Summary: This article proposes a lightweight MMC-based grid-connected energy router (MGER) that integrates large-scale photovoltaic (PV) and centralized energy storage (ES) to eliminate power mismatches between legs and arms. The MGER uses four-terminal dual-active-bridges (FDAB) to connect horizontal three SMs, ensuring power balance and eliminating second-order circulating currents.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Tianxiang Yin, Lei Lin, Chen Xu, Donghai Zhu, Kaiyuan Jing
Summary: This article proposes a hybrid modular multilevel converter (MMC) topology based on SiC mosfet and Si IGBT. By improving the modulation scheme and introducing a specialized voltage balancing scheme, the performance of the system is enhanced. Simulation and experimental results demonstrate the feasibility of the hybrid MMC and its superiority in terms of cost, loss, and feasibility compared to others.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Lei Zhang, Jiangchao Qin, Youhui Qiu, Keyou Wang, Zirun Li, Yi Tang
Summary: The losses and volume of MMC-based SST under different operating conditions are comprehensively analyzed and evaluated using a developed computational model and methodology. The proposed analysis and methodology provide guidance and basis for the optimal design of MMC-SST in the future.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zhijie Liu, Ke-Jun Li, Zhonglin Guo, Jinyu Wang, Jianhang Qian
Summary: This article focuses on evaluating the over-modulation risk of modular multilevel converters (MMCs). It proposes a new concept called dynamic modulation ratio (DMR) to accurately reflect the modulation characteristics, as the conventional modulation ratio (CMR) is found to be inaccurate for MMCs. Quantitative comparisons show that the DMR-based evaluation method is consistently accurate in all situations.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Futian Qin, Feng Gao, Yi Tang, Tao Xu, Jinyu Wang, Decun Niu
Summary: This article introduces a new nine-arm modular multilevel converter with improved hybrid submodules for middle arms, which can reduce the dc-side voltage, eliminate the dc offset in common mode voltages, and provides a control method for middle arm current. The feasibility and performance characteristics of the proposed 9A-MMC were verified through simulation and experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Tuhin S. Basu, Suman Maiti, Chandan Chakraborty
Summary: This article introduces a hybrid modular multilevel converter (HMMC) for large-scale PV integration, utilizing a distributed maximum power point tracking (D-MPPT) method to extract maximum power from PV panels. The use of zero sequence voltage (ZSV) injection is implemented to address power unbalance issues during partial shading, and the proposed control method is validated through simulation and experimental testing.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Xicai Pan, Shangzhi Pan, Pengxin Jin, Liangzhong Yao, Jinwu Gong, Fei Liu, Xiaoming Zha
Summary: This article proposes a grid-connected PV converter based on MMC, which enables long-distance DC transmission and local consumption of PV. Through the combination of topology and control strategy, the low-frequency components of voltage ripple can be eliminated, reducing system volume and cost, and increasing system life and reliability.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Saleh Farzamkia, Houshang Salimian Rizi, Alex Q. Huang, Hossein Iman-Eini
Summary: This article proposes a shared redundancy strategy for improving the reliability and useful lifetime of the modular multilevel converter (MMC) by allowing the flexible utilization of redundant submodules (RSMs) in both upper and lower arms. Simulation and experimental results confirm the effectiveness of this strategy in enhancing the reliability and fault-tolerant capability of MMC.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Hongqi Ding, Fujun Ma, Rong Han, Lei Wang, Man-Chung Wong
Summary: This article proposes a control method to achieve thermal distribution balance between top and bottom devices, successfully reducing temperature differences and increasing system lifetime.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Ebin Cherian Mathew, Rahul Sharma, Anandarup Das
Summary: A new circuit topology of DC-DC converter for high step-down ratio is proposed in this article, which can tap power from HVDC system efficiently. The converter operates based on a resonant circuit, achieving zero-current switching for all switches. Experimental verification has shown the feasibility of the proposed circuit topology.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Nibedita Parida, Anandarup Das
Summary: This article presents an isolated dc-dc modular multilevel converter topology designed to extract power from the HVdc link, featuring two stages of power conversion and a high-voltage transformation ratio. Operating at medium-frequency ac reduces the size of the transformer and passive elements, while implementing a sinusoidal level-shifted pulsewidth modulation technique ensures voltage close to a sine wave.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Nibedita Parida, Anandarup Das
Summary: This paper introduces a new DC to AC Modular Multilevel Converter (MMC) topology that requires fewer arms than traditional MMC to generate high quality output AC voltage. By utilizing passive tuned LC filters in place of negative arms, this new topology reduces switching harmonics and produces output voltage closer to a pure sine wave. Overall, the proposed converter design offers improved output waveform quality with reduced hardware requirements.
IETE TECHNICAL REVIEW
(2022)
Article
Engineering, Electrical & Electronic
Nidhi Bisht, Anandarup Das
Summary: This article proposes a fault-tolerant topology for cascaded H-bridge converters in motor drive applications, which can handle multiple faulty cells and improve the power factor range during most fault conditions. The impact of redundant cells' dc-link voltage on fault tolerance capability is discussed, and a PWM clamping technique is proposed to maintain rated line voltage during postfault conditions. The fault-tolerant topology is verified using computer simulation and experimental results.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Martin Joy Cheerangal, Amit Kumar Jain, Anandarup Das
Summary: This study proposes a speed control strategy for rotor field-oriented induction motor during input supply voltage sag, aiming to maintain torque and speed constant. By solving voltage, current, and torque constraints in the current plane, reference current commands are obtained to ensure the motor delivers load torque with reduced speed during voltage sag. Mathematical equations explaining current trajectory, voltage sag limit, and settling speed are derived for analysis and control implementation in MATLAB/Simulink.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Ebin Cherian Mathew, Anandarup Das
Summary: This article presents a strategy to reduce the number of equipment involved in the offshore renewable energy conversion process. The output of a permanent magnet synchronous generator coupled with a wind turbine is converted to a low voltage DC and directly connected to a Medium Voltage Direct Current (MVDC) corridor using a new fault tolerant soft switched high gain DC-DC converter. The proposed scheme is discussed in detail and validated through simulation studies and experimental results.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Automation & Control Systems
Martin Joy Cheerangal, Amit Kumar Jain, Anandarup Das
Summary: In this article, a postfault control technique is proposed for a rotor field-oriented induction motor drive fed from a cascaded H-bridge multilevel converter. The technique adjusts the injected fundamental common mode voltage based on the motor's operating condition to ensure maximum line voltage and equal power distribution. Additionally, an integrated control strategy is presented to maintain the motor's command speed and load torque.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Subhasis Nayak, Anandarup Das, Raymundo E. Torres-Olguin, Salvatore D'Arco, Giuseppe Guidi
Summary: The cascaded H-bridge multilevel converter is an attractive solution for integrating photovoltaic generators with the AC grid. However, the imbalance in power generation from the PV panels can lead to violation of power quality constraints. This article proposes a new method of fundamental frequency zero-sequence voltage injection using battery energy support to compensate for the effects of unbalanced PV power generation. The coordination between the PV system and battery energy support is also discussed, along with a novel approach to deliberate zero-sequence voltage injection, which allows for balanced current injection into the grid.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Martin Joy Cheerangal, Amit Kumar Jain, Anandarup Das
Summary: The article proposes a postfault control strategy for a rotor field oriented induction motor drive, which maximizes the power capability of the converter by adding power cells and utilizes the maximum line voltage from redundant cells. It also adds a common mode voltage of fundamental frequency to distribute power evenly among the remaining healthy cells in postfault operation.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Proceedings Paper
Energy & Fuels
Hamed Nademi
Summary: This paper presents an intelligent controller based on machine learning algorithm and predictive control strategy, which enables optimal load dispatching among distributed energy resources and electric vehicle battery chargers. The controller's performance is validated through Hardware-in-the-Loop testing and compared with the traditional finite-control-set model predictive control.
2022 IEEE 7TH SOUTHERN POWER ELECTRONICS CONFERENCE, SPEC
(2022)
Proceedings Paper
Nidhi Bisht, Anandarup Das
Summary: A novel fault-tolerant technique for CHB STATCOM is proposed in this study, which maintains the reactive power capacity of the converter by injecting FZSV and introducing a reserved cell to compensate for voltage imbalance. The proposed technique ensures that the converter's capacitor voltages remain at their reference levels and the line voltage obtained from the converter is not reduced.
2021 NATIONAL POWER ELECTRONICS CONFERENCE (NPEC)
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
Mohammad Saleh Khan, Soumya Shubhra Nag, Anandarup Das, Changwoo Yoon
Summary: This paper introduces a bidirectional buck-boost converter that can dynamically vary the dc-link voltage of an electric vehicle power train, reducing switching losses in the inverter stage. The converter employs two non-inverting buck-boost modules to provide different operating modes as needed and develops a closed-loop control strategy for stable operation. The analysis and control performance are validated through simulations and experiments, demonstrating stable operation in different modes with up to 400 V, 1.5 kW output and 150 V input.
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2021)
Proceedings Paper
Engineering, Industrial
Hamed Nademi, Kourosh Sedghisigarchi, Luigi Vanfretti
Summary: Wind power converters with modularity and scalability features play a crucial role in connecting wind farms with medium/high-power systems. Offshore or onshore grids are prone to instabilities under certain conditions, which can be mitigated by adaptive control solutions. The study evaluates the operational performance of the Modular Multilevel Matrix Converter (M3C) for transmitting power from offshore wind farms to onshore AC grids, aiming to address instability issues and enhance stability margins.
PROCEEDINGS OF 2021 IEEE 30TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE)
(2021)
Proceedings Paper
Automation & Control Systems
Hamed Nademi, James Choi, Prottay Adhikari, Luigi Vanfretti, Shehab Ahmed, Kourosh Sedghisigarchi
Summary: The importance of real-time modeling and simulation in power systems is evident in supporting developers during design, prototyping, and verification processes, especially when facing challenges of integrating distributed energy resources and distribution loads. This paper discusses the development of a real-time model for a microgrid distribution test case using MATLAB/Simulink and RT-LAB tools, focusing on analyzing microgrid stability and verifying control designs.
IECON 2021 - 47TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
(2021)
Proceedings Paper
Automation & Control Systems
Sukrashis Sarkar, Anandarup Das
Summary: The paper discusses the challenges faced by HB-MMC based HVDC systems in the presence of DC and AC faults, proposing a Fault Limiting Circuit (FLC) to address these issues. The FLC operates during fault conditions to reduce fault currents and maintain the efficiency of the converter. Simulation results in the EMTP platform show good agreement with theoretical analysis.
IECON 2021 - 47TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
(2021)
