Article
Automation & Control Systems
Philippe A. Gray, Peter W. Lehn, Netan Yakop
Summary: This article proposes a novel modular multilevel dc-dc converter with high power-density potential. It combines the advantages of modular multilevel converter (MMC) and flying capacitor converter. The converter features a new current source submodule (CSM) stage that reduces the string current and allows common grounding of the input source and output load. The article introduces the operating principles and the control design, and the laboratory-scale prototype achieves a peak efficiency of 97.1%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
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
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
Engineering, Electrical & Electronic
Cristian Pineda, Javier Pereda, Felix Rojas, Gabriel Droguett, Claudio Burgos-Mellado, Alan J. Watson
Summary: This study introduces a novel zero-current switching modulation technique for high-step-ratio MMC DC-DC converters, which generates trapezoidal or triangular current by minimizing the root-mean-square current to operate the converter over a wide range of output voltage and power. The proposed optimization uses a simple control scheme to regulate output voltage and voltage balance among the floating cell capacitors, and has been validated through theoretical analysis and a laboratory-scaled prototype, demonstrating effectiveness and excellent dynamical response.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Decun Niu, Feng Gao, Tao Xu, Zhan Ma
Summary: This article proposes a thyristor-based T-type converter with modular multilevel dc-link, which can be used as a medium-/high-voltage static synchronous compensator and achieve capacitor voltage balancing under various operation conditions.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Saurav Dey, Tanmoy Bhattacharya
Summary: A modular multilevel dc-dc converter philosophy is proposed in this article to exchange power between HVdc links of different voltage levels. The converter operates symmetrically in four quadrants, unaffected by voltage polarity, allowing power flow direction/magnitude to remain constant even with reversal of power flow in the HVdc link. The working principle is analytically explained and validated through simulation and experimental results.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
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
Energy & Fuels
N. J. Bodele, P. S. Kulkarni
Summary: Due to the focus on energy savings and eco-friendliness, solar PV-based DC Nano-grids are gaining popularity for residential and commercial buildings. However, solar photovoltaic systems are intermittent and unreliable due to external factors and power degradation. To address these issues, this paper proposes a bidirectional modular PV battery system (BMPBS) that utilizes non-isolated buck and boost converters. The BMPBS can handle losses and intermittency in SPV with the help of a battery storage system, making the overall SPV system reliable.
Article
Engineering, Electrical & Electronic
Ngoc Dat Dao, Hoang Vu Nguyen, Dong-Choon Lee
Summary: This article introduces a novel semimodular three-phase ac/dc structure for modular solid-state transformers, which employs single-stage indirect matrix-based ac/dc converters to significantly reduce the number of semiconductor devices in the system. A decentralized control scheme and a 360-kW system design have been developed to evaluate the efficiency and performance of the proposed system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Suhua Luo, Fengjiang Wu, Guizhong Wang
Summary: In this article, a novel topology with a three-level half-bridge matrix converter and a resonant tank is proposed to improve the current characteristics of the single-stage dual active bridge type isolated ac-dc converter. The operation principle and steady-state characteristics are analyzed based on PWM plus phase shift modulation. The proposed converter reduces voltage stress and current stress on power switches, and is valuable in medium-voltage applications for high-frequency power conversion. Detailed experimental results verify the correctness and feasibility of the proposed topology and theoretical analysis.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Review
Engineering, Electrical & Electronic
Kaitao Bi, Yue Liu, Yixin Zhu, Qigao Fan
Summary: This paper proposes a novel impedance source modular DC/DC converter for energy storage system, overcoming the drawbacks of traditional converters and improving system efficiency with simplified structure.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Engineering, Multidisciplinary
Mai Diab, Ahmed A. Elserougi, A. S. Abdel-Khalik
Summary: This paper presents a hybrid modular multilevel DC-DC converter topology that successfully solves the issue of capacitors voltage imbalance during DC-DC conversion. The proposed converter can achieve arm energy equalization and operate as a DC transformer.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
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)
Article
Engineering, Electrical & Electronic
Tomokazu Mishima, Shoya Mitsui
Summary: This study presents a new single-stage high frequency-link three-phase LLC converter with soft switching commutation for a wide range of load power adjustment. The load power and voltage can be regulated by pulse frequency modulation and phase-shift pulsewidth-modulation.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Amit Kumar Bhattacharjee, Issa Batarseh
Summary: A new three-port converter proposal is introduced in this article, which interfaces two dc voltage sources of different magnitudes and an output ac port in a single stage. The system is based on a dual active bridge topology and uses dual phase-shift modulation for power flow between the dc ports and the ac port. The converter achieves fully soft switched three-port power conversion with reduced active devices, and the modulation scheme is simpler compared to existing topologies.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
