Results 41 to 50 of about 466 (144)

Quasi square wave operation of modular multilevel converter based dual active bridge DC–DC converter with inductor energy recovery

IET Power Electronics
The modular multilevel DC–DC transformer (MMDCT) provides a reliable solution to overcome the challenges of conventional dual‐active‐bridge converters in terms of power semiconductors ratings and dv/dt stress on transformer coupling windings.
Peizhou Xia, Chuantong Hao, Paul Judge, Michael Merlin, Stephen Finney   +4 more
doaj   +1 more source

Power Electronic Converters Evolution In Transmission System: HVDC & FACTS Device [PDF]

E3S Web of Conferences
Power electronics have helped achieve this objective of increasing capacity while improving reliability and sustainability and reducing operating costs over the years. They have provided added flexibility and control to power systems.
Rao D. S. N. M., Cenate Theresa C.F., Dhabliya Dharmesh, Alabdeli Haider, Hussein Abbas Hameed Abdul   +4 more
doaj   +1 more source

About the Ageing‐Induced Modifications of Physical‐Chemical and Electrical Properties of Polyimide (PMDA‐ODA) Under Gamma Radiation and High Temperatures

High Voltage, EarlyView.
ABSTRACT This study investigates the effects of radiation‐induced ageing on the physical, chemical, mechanical and electrical properties of Poly[4,4′‐oxydiphenylene‐ pyromellitimide] (PMDA‐ODA) polyimide, a high‐performance insulation material widely used in aerospace applications.
Simone Vincenzo Suraci, Jizhu Jin, Davide Mazza, Davide Fabiani   +3 more
wiley   +1 more source

Theoretical Evaluation of Semiconductor Loss Components Behavior in ISOP-DAB Converters [PDF]

, 2021
Input-Series Output-Parallel (ISOP) connected Dual-Active-Bridges (DABs) form an interesting topology which enable step down MVDC to LVDC by employing medium frequency transformers.
Beiranvand, Hamzeh, Liserre, Marco, Rorok, Esmaeel   +2 more
core   +1 more source

Robust sliding mode control for the MMC‐HVDC transmission system with SCR uncertainty

IET Power Electronics
Modular multilevel green converter based high voltage direct current (MMC‐HVDC) transmission system has become a practical solution to interconnect renewable energy sources to main AC grids. Connecting the MMC to a weak AC system is still a challengeable
Farzin Gharaghani, Mehdi Asadi
doaj   +1 more source

A Novel Converter Transformer DAM‐LSTNet Vibration Generation Model for Data Imbalance Identification

High Voltage, EarlyView.
ABSTRACT Converter transformer vibration failures, primarily because of winding and core vibrations, severely impact the safe operation of high voltage direct current (HVDC) systems. These vibrations are influenced by voltage and current, and are transmitted through transformer oil and structural components to the tank. Current numerical models fail to
Peiyu Jiang, Fanghui Yin, Liming Wang
wiley   +1 more source

Detailed quantitative comparison of half-bridge modular multilevel converter modelling methods [PDF]

, 2018
This paper presents a detailed comparison of different modelling methods of the half-bridge modular multilevel converter (HB-MMC), namely, switching function, Thevenin equivalent and averaged, considering both MMC implementations (large and reduced ...
Adam, G.P., Audichya, Yash, Burt, Graeme, Emhemed, Abdullah, Guo, Deyang, Rahman, M.H., Xu, Lie   +6 more
core  

Directional derivative-based method for quasi-stationary voltage support analysis of single-infeed VSC-HVDC units

High Voltage, 2020
This study presents an investigation of the impact of the quasi-stationary voltage support provided by a voltage source converter (VSC) connected to a single point of a power system.
Arcadio Perilla, Jose Luis Rueda Torres, Jose Luis Rueda Torres, Elyas Rakhshani, Roni Irnawan, Filipe Faria da Silva, Mart van der Meijden, Claus Leth Bak, Alex Alefragkis, Anna Lindefelt   +9 more
doaj   +1 more source

Mechanism of Damage and Micro‐Characterisation of Irradiation‐Induced Free Radicals on the Epoxy Insulation of the Bridge Arm Reactors at High Altitude

High Voltage, EarlyView.
ABSTRACT Damage degradation of epoxy resin insulating materials by free radicals triggered by the ultraviolet irradiation environment at high altitude has become a key issue that restricts the reliability of the bridge arm reactor at high altitude.
Liang Zou, Xinya Luo, Zhiyun Han, Zhen Li, Xiaofeng Ding, Kejie Huang   +5 more
wiley   +1 more source

A capacitance reduction modulation approach of hybrid modular multilevel converter with boosted modulation index and circulating current injection

IET Power Electronics
In a modular multilevel converter (MMC) system, the sub‐module capacitors account for a large proportion of the cost, volume, and weight. This paper proposed a method to reduce the total capacitance of MMC based on the combination of boosting the ...
Hongxu Li, Qin Wang, Qunfang Wu, Lan Xiao, Jinbo Li, Qi Chen   +5 more
doaj   +1 more source