Results 151 to 160 of about 35,595 (177)

Optimum Injection of Second Harmonic Circulating Current for Reduction in Submodule Capacitor Voltage Ripple in Over-modulated MMC

2021 IEEE Energy Conversion Congress and Exposition (ECCE), 2021
In Modular Multilevel Converter (MMC), submodule capacitor value determines the overall cost, size, and weight of the converter. Minimizing the submodule capacitance value without increase in the voltage ripple is a challenge. Injecting the Second Harmonic line frequency component in Circulating Current(SHCC) is a well-explored idea to reduce the ...
G Veera Bharath, Poras T. Balsara
openaire   +1 more source

Classical and strongly classical \(n\)-absorbing second submodules

2022
Summary: Let \(R\) be a commutative ring with identity and \(M\) be an \(R\)-module. The main purpose of this paper is to introduce and investigate the notion of classical and strongly classical \(n\)-absorbing second submodules as a dual notion of classical \(n\)-absorbing submodules. We obtain some basic properties of these classes of modules.
openaire   +2 more sources

Analysis of Submodule Capacitor Voltage Ripple and Second-Harmonic Current in MMCs

2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL), 2019
This paper presents a straightforward approach to analyze the 2nd harmonic currents in modular multilevel converters. The submodule capacitor voltage ripple is derived based upon the capacitor’s charge variations instead of commonly used energy variations, resulting in simplified calculations and an explicit expression for the voltage ripple to ...
Xianghua Shi, Shaahin Filizadeh, Liwei Wang   +2 more
openaire   +1 more source

On (n ? 1, n)-?-second submodules

2023
Let R be a commutative ring with identity, M be an R-module, n ? 2 be a positive integer and ?: S(M) ?? S(M) be a function where S(M) is the set of all submodules of M. In this paper we introduce and study the concept of (n ? 1, n)-?-second submodule. We call a non-zero submodule N of M as an (n ? 1, n)-?-second submodule if (a1 …an?1)N ? K and (a1 …an?
Çeken S., Koç S., Tekir Ü.
openaire   +1 more source

2-absorbing \(I\)-prime and 2-absorbing \(I\)-second submodules

2019
Summary: Let \(R\) be a commutative ring and let \(I\) be an ideal of \(R\). In this paper, we will introduce the notions of 2-absorbing \(I\)-prime and 2-absorbing \(I\)-second submodules of an \(R\)-module \(M\) as a generalization of 2-absorbing and strongly 2-absorbing second submodules of \(M\) and explore some basic properties of these classes of
openaire   +2 more sources

A modified modular multilevel converter to reduce the second order ripples in the submodule capacitor voltage: Design and analysis

International Journal of Circuit Theory and Applications
SummaryThe modular‐multilevel converter (MMC) faces the problem of second order ripples in the sub‐module DC capacitor voltage during the low frequency operation at the load side. To sort out this problem, this paper demonstrates a three‐phase modified MMC that includes a novel circuit placed between upper and lower arms of each phase, where load is ...
Ramudu Ganji, Jiwanjot Singh
openaire   +1 more source

Small second submodules

AIP Conference Proceedings
Inaam M. A. Hadi, Maysoun A. Hamel, Muntaha Khudhair Abbas   +2 more
openaire   +1 more source

Condition Health Monitoring of Modular Multilevel Converter Submodule Capacitors

IEEE Transactions on Power Electronics, 2022
Drazen Dujic
exaly  

S-small second submodules

AIP Conference Proceedings
Maysoun A. Hamel, Inaam M. A. Hadi
openaire   +1 more source

Online Capacitance Estimation of Submodule Capacitors for Modular Multilevel Converter With Nearest Level Modulation

IEEE Transactions on Power Electronics, 2020
Kun Wang, Lin Jin, Guangdi Li
exaly