Results 51 to 60 of about 22,049 (174)
IEEE AccessThe Hybrid Modular Multilevel Converter (HMMC) topology—comprising full-bridge (FB) and half-bridge (HB) submodules—is effective for DC fault clearance in HVDC systems.
Muhammad Usman, Il Kwon, Bang-Wook Lee
doaj +1 more source
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
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
Converting Overhead Lines from HVAC to HVDC: An Overview Analysis
, 2021 Several contributions in technical literature highlight the potential offered by the conversion of an existing HVAC overhead line into a HVDC one. In the context of the world's energy transition from fossil fuel-based to higher and higher renewable ...
L'Abbate A. +3 more
core +1 more source
Behaviour of HVDC Cables Under Variable Load Conditions: PD Detection and Recognition [PDF]
, 2023 HVDC technology is widely used today in the field of energy transmission over long distances and with underground or submarine cable lines. The advantages of these applications lie in the absence of stability and transport capacity problems which ...
Romano P. +5 more
core +1 more source
Comparative Analysis and Optimization of HVAC and Multi-Terminal HVDC Integration 400kV Super Grid (Case Study of Iraq) [PDF]
Problems of the Regional EnergeticsThe Iraqi 400-kV super grid faces significant operational challenges, including high transmission losses, overloaded transmission lines, voltage instability, and limited long-distance power transfer capability.
Sana Khalid Abdulhassan +2 more
doaj +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
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
High Voltage, EarlyView.ABSTRACT This paper provides an overview of high‐temperature superconducting (HTS) cables in DC systems, with a focus on their deployment in high‐voltage DC (HVDC) networks. The assessment of HTS cable properties—such as extremely low electrical resistance, high current‐carrying capacity and a compact geometry—and their comparison with those of ...
Mohammad Hossein Mousavi +2 more
wiley +1 more source
Voltage Source Converter based High Voltage Direct Current Transmission: A Comprehensive Review of Control Strategies, Developments and Trends [PDF]
E3S Web of ConferencesThe continuous increasing progress in high power and high voltage semiconductor devices leads to have a substantial impact on optimization and effective management of electric grids. These developments have great influence on High Voltage Direct Current (
Gangikunta Manohar +3 more
doaj +1 more source