Results 71 to 80 of about 36,815 (251)

Development of ± 550 kV DC GIS Basin Insulator

High Voltage, EarlyView.
ABSTRACT The basin insulator is a core component of the insulation system for ± 550 kV gas‐insulated switchgear (GIS). This paper, using a finite element method for multi‐physics simulations of electric–thermal coupling, determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators.
Shaohua Cao, Chengwei Jing, Siqiong Zhang, Zuodong Liang, Zehao Zhang, Fangwei Liang, Yong Yang, Geng Chen, Jinliang He, Chuanyang Li   +9 more
wiley   +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

Tracking wheel test for DC polymeric insulators [PDF]

, 2011
Il lavoro di tesi svolto è atto ad apportare delle migliorie nel sistema di trasmissione HVDC (High Voltage Direct Current). Un elemento problematico per le linee aeree HVDC è dato dagli isolatori, questa situazione si aggrava particolarmente nel caso in
Gazzola, Alice
core  

Stability and control of VSC-based HVDC systems: A systematic review

e-Prime: Advances in Electrical Engineering, Electronics and Energy
The technological development in the area of power electronics has paved the way for the construction of High Voltage Direct Current (HVDC) systems. The utilization of HVDC grids alongside conventional High Voltage Alternating Current (HVAC) grids poses ...
Fazel Mohammadi, Neda Azizi, Hassan Moradi CheshmehBeigi, Kumars Rouzbehi   +3 more
doaj   +1 more source

Analyses and Comparisons of Generic and User Writing Models of HVDC System Considering Transient DC Current and Voltages

Energies, 2021
Analyses and comparisons of generic models and a novel modeling method of line-commutated converter (LCC)-based high voltage direct current (HVDC) systems are presented for the power system simulator for engineering (PSS/E) simulation tool.
Dohoon Kwon, Youngjin Kim
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

Pilot protection scheme for transmission line of a hybrid HVDC system based on polarity characteristics of current and voltage fault components

The Journal of Engineering, 2019
A hybrid high-voltage direct current (HVDC) system comprises a line commutated converter (LCC) at the rectifier side and a voltage source converter (VSC) at the inverter side, combining advantages of both LCC and VSC systems.
Yanting Wang, Baohui Zhang, Baohui Zhang, Shaojie Cheng   +3 more
doaj   +1 more source

HVDC Breaker Power Loss Reduction by Bridge-Type Hybrid Breakers

Energies, 2021
Several types of high voltage direct current (HVDC) breakers have been introduced and commercialized. Each of them has advantages and disadvantages. Among them, the hybrid HVDC breaker is highly successful.
Morteza Hesami, Ali Bakhshi, Sheyda Mousavi, Kumars Rouzbehi, Juan Manuel Escaño   +4 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

Switching overvoltages and polarity reversal in presence of HVDC circuit breakers

, 2023
The recent development of High Voltage Direct Current circuit breakers (HVDC CBs) prototypes may introduce many potential advantages for HVDC links in terms of flexibility and possible meshing.
Spezie R., Palone F., Buono L., Pizzimenti F., Vacante P., Lauria S., Papi L., Tresso G., Capponi F. G.   +8 more
core   +1 more source