Results 41 to 50 of about 6,051,817 (218)
VSC transmission system using flying capacitor multilevel converters and hybrid PWM control [PDF]
, 2007 A high-voltage direct current (HVDC) transmission system based on three-level flying capacitor (FC) multilevel converters with hybrid pulse-width modulation (PWM) is presented in this paper.
Agelidis, V.G., Xu, L.
core +1 more source
Overview of Research on Stability and Control of VSC-HVDC
发电技术, 2019 Voltage source converter based high voltage direct current (VSC-HVDC) transmission systems has the advantages of good active and reactive power control capability and more suitable for multi-terminal transmission system.
Mingzhe WU, Wuhui CHEN
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
The Alternate Arm Converter: A New Hybrid Multilevel Converter With DC-Fault Blocking Capability [PDF]
, 2013 This paper explains the working principles, supported by simulation results, of a new converter topology intended for HVDC applications, called the alternate arm converter (AAC).
Merlin, Michael MC +6 more
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Recent developments in HVDC transmission systems to support renewable energy integration
Global Energy Interconnection, 2018 The demands for massive renewable energy integration, passive network power supply, and global energy interconnection have all gradually increased, posing new challenges for high voltage direct current (HVDC) power transmission systems, including more ...
Zhou Li +6 more
doaj +1 more source
Energy Reports, 2022 Traditional analogous π-shape transmission line models are mainly designed based on the amplitude and phase response characteristics of the distributed-parameter transmission lines at the power frequency.
Jinrui Tang +4 more
doaj +1 more source
HVDC power transmission electrode siting and design [PDF]
, 1997 This research strives to shed light on the feasibility and practicality of using deep earth electrodes to permit their use for extended periods without adverse consequences. This report begins with a review of the fundamentals associated with current conduction in earth, including the various techniques available for measuring the earth`s electrical ...
Holt, R.J., Dabkowski, J., Hauth, R.L.
openaire +2 more sources
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
Selective Harmonic Elimination Modulation for HVDC Modular Multilevel Converter
, 2021 This paper proposes the application of a mixed selective harmonic elimination mitigation modulation algorithm to three-phase HVDC modular multilevel converters. Defining 1 the number of levels, two cases have been considered: t=65 and t=257.
Cimoroni M. G. +5 more
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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