Results 51 to 60 of about 22,903,616 (209)
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 +5 more
wiley +1 more source
Space charge dynamics in oil and thick pressboard combined system under polarity reversal voltage [PDF]
, 2014 In this study, the space charge dynamics in an oil and oil impregnated pressboard combined insulation system are investigated by the means of pulsed electroacoustic (PEA) technique under voltage polarity reversal conditions. To be closer to the real case
Hao, Miao +9 more
core +1 more source
Rating methodology of high voltage mass impregnated DC cable circuits
, 2014 With the continuing growth in energy consumption worldwide, the move towards a European wide super grid will result in significant changes in how modern transmission and distribution networks are operated.
Huang, Ziyi
core +1 more source
Stability and control of VSC-based HVDC systems: A systematic review
e-Prime: Advances in Electrical Engineering, Electronics and EnergyThe 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 +3 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 +5 more
wiley +1 more source
Power electronics options for large wind farm integration : VSC-based HVDC transmission [PDF]
, 2006 This paper describes the use of voltage source converter based HVDC transmission (VSC transmission) system for grid integration of large wind farms over long distance.
Xu, Lie +8 more
core +1 more source
High Voltage, EarlyView.ABSTRACT The alternate arm converter (AAC) is one of the most efficient multilevel topologies based on voltage source converters (VSCs), which has recently gained attention in various applications, particularly in high voltage direct current (HVDC) systems.
Ehsan Akbari, Milad Samady Shadlu
wiley +1 more source
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 +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 +4 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source