Results 181 to 190 of about 8,445,481 (227)

Design of a Small-Scale SiC-based Modular Multilevel Converter for Experimental Verification of Back-to-back Network Studies

European Conference on Cognitive Ergonomics, 2023
This paper presents the design, control, and experimental validation for a full SiC-based modular multilevel converter (MMC). The prototype, rated at 700 Vdc and power of 21 KVA, can be used to study the operation of MMC as a single converter or in a ...
Haodong Yang, Liyang Du, Mojtaba Ahanch, H. Mantooth, Roy McCann   +4 more
semanticscholar   +1 more source

A Modulation Method Suitable for AM-MMC with Small Quantities of Submodules

2023 Power Electronics and Power System Conference (PEPSC), 2023
When the arm multiplexed modular multilevel converter (AM-MMC) is used in medium-voltage DC distribution grid, the number of sub modules is small, and the nearest level approach modulation (NLM) strategy in the DC transmission system will lead to serious
Zhukui Tan, Yutao Xu, Zhongting Chang, Qihui Feng, Zhenxing Zhang   +4 more
semanticscholar   +1 more source

Equivalent Method of IGCT-MMC Submodule Snubber Parameter for VSC-HVDC System Study

2025 2nd International Conference on Electrical Technology and Automation Engineering (ETAE)
Recently, much attention has been paid to the investigations on IGCT based modular multilevel converter (IGCT-MMC). However, the time constant of additional snubber in IGCT-MMC submodule is quite small (orders in $\mu \mathrm{s}$), leading to a smaller ...
Qinan Li, Lanfang Li, Yuhan Zhang, Zhixiang Liu, Peng Jiang, Huafei Yang, Yajun Lu   +6 more
semanticscholar   +1 more source

r-Small Submodules

2020
In this work, every ring have unity and every module is unital left module. Let M be an R-module and N < M. If N < RadM, then N is called a radical small (or briefly r-small) submodule of M and denoted by N 
NEBİYEV, Celil, ÖKTEN, Hasan Hüseyin
openaire   +1 more source

Integration of a Clamp Double Submodule Based on Integrated Chips for MMC Reliability Improvement

IEEE Journal of Emerging and Selected Topics in Power Electronics
Among different modular multilevel converters (MMCs) submodules (SMs), the clamp double submodule (CDSM) has the capability of dc-fault current clearing with a relatively small number of switching devices.
Binyu Wang
semanticscholar   +1 more source

An Asymmetric Hybrid Phase-Leg Modular Multilevel Converter With Small Volume, Low Cost, and DC Fault-Blocking Capability

IEEE transactions on power electronics
Hybrid modular multilevel converters (MMCs) have exhibited superior power density and cost-effectiveness than the conventional half-bridge submodule-based MMC (HB-MMC), while still maintaining the hassle of using high-voltage dc supporting capacitors or ...
Rui Zhang, Shunliang Wang, Junpeng Ma, Yajie Jiang, Peng Wang, Tianqi Liu, Yun Yang   +6 more
semanticscholar   +1 more source

Hopfcity and Jacobson small submodules

2023
In this paper, the author generalizing the notions of generalized Hopfian module, weakly Hopfian module, \(\delta\)-weakly Hopfian module, defines a Jacobson weakly Hopfian module (which we write, in short, in this review, as \(J\)-\(w\) Hopfian module) and investigates its properties. The author derives equivalent conditions for a projective module to
openaire   +1 more source

Modified Modular Multilevel Converter to Reduce Submodule Capacitor Voltage Ripples Without Common-Mode Voltage Injected

IEEE transactions on industrial electronics (1982. Print), 2019
This paper presents a modified modular multilevel converter with the three-terminal middle-cells inserted between arms and ac-side for medium voltage applications.
Ming Huang, Jianlong Zou, Xikui Ma, Yang Li, Mingyue Han   +4 more
semanticscholar   +1 more source

Small 2-prime sub-modules

Journal of Discrete Mathematical Sciences and Cryptography
For an D-module (abbreviated D-mod) W and a commutative ring (with identity) D. we introduce the notion of small 2-prime sub-module (S-2-P sub-module; for short ) as a generalization of 2-prime sub-module.
H. A. Hassan, Alaa A. Elewi
semanticscholar   +1 more source

Large Small compressible and Large Small retractable Modules

Journal of Al-Qadisiyah for Computer Science and Mathematics
We consider R is any ring with identity and  is a non-zero unitary left R-module. In this article we introduce the notion of large small Compressible modules and large small Retractable module.
Rawnaq Khaleel Ibrahim, Sahira . M. Yassen   +1 more
semanticscholar   +1 more source