Results 31 to 40 of about 235 (103)

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

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

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

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

Deterioration Law of Mechanical Properties of Insulation Pressboard Under Multifield Coupled Ageing

High Voltage, EarlyView.
ABSTRACT Converter transformers can experience progressive deterioration of their oil–pressboard insulation under elevated temperature, combined AC–DC electrical stress and persistent mechanical vibration. This study investigates how mechanical vibration affects the mechanical properties of insulation pressboard and clarifies the associated microscopic
Jiayi Chen, Guan Wang, Zihao Li, Zhongyu Zhao, Kuo Yan, Hongshun Liu   +5 more
wiley   +1 more source

A Thermal‐Dependent Conductivity Coating for Surface Charge and Electric Field Mitigation Under Electrothermal Coupling Field

High Voltage, EarlyView.
ABSTRACT The problem of gas–solid interface charge accumulation is an important reason for distorting the surface electric field and then inducing surface discharge. The temperature gradient distribution formed on the spacer during the operation of a gas‐insulated transmission line (GIL) will aggravate the surface charge accumulation, further ...
Jianyi Xue, Bowen Xing, Weiming Wang, Jianzhao Sang, Ning Yang, Tao Wen, Lijian Ding   +6 more
wiley   +1 more source

A simple 60‐pulse voltage source inverter using voltage reinjection strategy to improve voltage harmonics for high‐power local loads

IET Power Electronics
The voltage reinjection strategy is an effective solution to improve the voltage quality of the voltage source inverters for high‐power applications.
Saeed Najafpour, Reza Ghandehari
doaj   +1 more source

Flexible CSC-HVDC system

The Journal of Engineering, 2019
The current source converter (CSC)-HVDC system is the key technology for long distance large power transmission. However, the traditional CSC-HVDC has two serious shortcomings: (i) vulnerable to commutation failures; and (ii) not being able to control ...
Haitao Wu, Yonghe Liu, Zhihe Wang, Lei Song, Fan Wu   +4 more
doaj   +1 more source