Results 41 to 50 of about 951 (185)

An Optimised Independent Arm Modulation Strategy Driven by Energy Balance Mechanism for Circulating Current Suppression in Arm‐Multiplexing Modular Multilevel Converters

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
The arm‐multiplexing modular multilevel converter (AM‐MMC) is a lightweight, high‐power‐density topology whose conventional modulation strategies require large circulating currents to maintain energy balance. This paper establishes a time‐domain analytical model of the AM‐MMC energy‐balance mechanism and proposes an optimised independent arm modulation
Zhen Zhang, Yi Wang, Bao Liu, Tianbo Zhang, Shenkai Wang, Qing Liu   +5 more
wiley   +1 more source

Comparison of full power frequency converter topologies for large capacity variable speed pumped storage units

电力工程技术
Variable speed pumped storage units have obvious advantages in efficiency and adaptability under various operation conditions compared with traditional fixed-speed pumped storage units.
Bo ZHAO, Fengyuan TIAN, Qichao ZHANG, Kaiguo WANG, Hao LIANG, Jinwu GONG   +5 more
doaj   +1 more source

Loss reduction analysis and control of AC-voltage-boosted FBSM MMC by injecting second harmonic circulating current

The Journal of Engineering, 2019
Reducing the power loss and handling short-circuit faults in HVDC systems are crucial for economical and reliable operation of modular multilevel converters (MMC). This paper proposes a loss reduction method for AC voltage-boosted FBSM-MMC by controlling
Muchao Xiang, Jiabing Hu, Zhiyuan He
doaj   +1 more source

3D Lumped Thermal Model for Compliant Press‐Pack IGBT Submodule in MMC

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
We present a 3D lumped thermal model for compliant press‐pack IGBT submodules in MMCs. The model accounts for double‐sided cooling and thermal coupling, achieving high accuracy and efficiency, making it suitable for real‐time condition monitoring. ABSTRACT The compliant press‐pack IGBT is widely used in modular multilevel converters (MMCs).
Shuguo Gao, Haoyu Liu, Ruiyi Fan, Lingyu Zhu, Jinxi Li, Weicheng Wang   +5 more
wiley   +1 more source

Novel single‐armed modular multilevel converter for reducing total converter capacitance

IET Power Electronics, 2021
During normal operation of a conventional Modular Multilevel Converter (MMC), half of its capacitors remain bypassed at any time instant, increasing the total required capacitance for converter operation, and in turn leading to a larger size and volume ...
Hamed Pourgharibshahi, Seyyedmahdi Jafarishiadeh, Hamid Mahmoudi, Hassan Zargarzadeh, Reza Ahmadi   +4 more
doaj   +1 more source

A Novel Modular Cascaded Topology for High‐Voltage Battery Energy Storage and Solar Photovoltaic Systems

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
Battery storage systems are limited to using a lot of parallel‐connected cells due to their insulation limits. In this paper, we propose a cascade‐based topology for energy storage systems and PVs, whose main advantage a lot of cells in series can be connected, obtaining higher operation voltages and reduced currents.
José M. Guerrero, Jelena Stojkovic Terzic, Unai Villena, Tomislav Rajić, D. Marene Larruskain   +4 more
wiley   +1 more source

Structure and Hierarchical Control Method of Battery‐Based Hybrid Power Flow Controller

International Transactions on Electrical Energy Systems, Volume 2026, Issue 1, 2026.
This article proposes a battery‐based hybrid power flow controller (B‐HPFC), offering enhanced flexibility for power flow regulation and energy storage. First, the structure of B‐HPFC is given, where the cascaded H‐Bridge (CHB) is integrated with the phase‐shifting transformer (PST). The batteries are connected to the modules of CHB.
Hua Shao, Ji Zhang, Shuo Wang, Ziyao Zheng, Jie Zhang, Mulian Zhang, Yumin Zhang   +6 more
wiley   +1 more source

Analysis and improvement of the reactive power cascade control strategy for MMC‐HVDC receiving‐end converter connected to weak grid

IET Generation, Transmission & Distribution
The weak AC grid in a modular multilevel converter modular multilevel converter based high voltage direct current (MMC‐HVDC) receiving‐end system requires faster reactive power support from the receiving‐end MMC.
Junhua Xu, Guopeng He, Yong Liu, Songqin Tang, Daiyu Xie, Mingyuan Chen   +5 more
doaj   +1 more source

Steady‐state power operation region of a modular multilevel converter connecting to an AC grid

High Voltage, 2021
The modular multilevel converter (MMC) has become a widely used topology for voltage source converter–based high‐voltage direct current transmission projects.
Jiecong Wang, Chongru Liu, Udaya D. Annakkage, Xiao Li, Chenbo Su   +4 more
doaj   +1 more source

Design a Third‐Order DDSM With Effective Random Dither in Fractional Frequency Synthesizers to Reduce Fractional Spurs

Journal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.
In this paper, a new method for multistage digital sigma–delta modulators (DDSMs) is presented to increase the output sequence period and reduce fractional spurs. The output of a DDSM is always a periodic signal when the input is constant. A hybrid DDSM is premiere to its conventional counterpart for having a potential speed, by the choice of its ...
Seyed Ali Sadatnoori, Iman Chaharmahali, Andrea Tani   +2 more
wiley   +1 more source