Results 71 to 80 of about 17,685 (234)

A distributed model‐free adaptive voltage control algorithm for distribution systems with extensive integration of photovoltaics

Energy Conversion and Economics
The widespread integration of photovoltaics (PVs) presents significant challenges to the operation and control of distribution systems, particularly in maintaining voltage stability at nodes with PV connections.
Baoye Tian, Zhifei Guo, Baorong Zhou, Lijuan Fan, Zhuoming Deng, Yongjie Zhang, Zuowei You, Lingxue Lin   +7 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

Solubility and Diffusivity of Polar and Non-Polar Molecules in Polyethylene-Aluminum Oxide Nanocomposites for HVDC Applications

Energies, 2020
The best commercial high-voltage insulation material of today is (crosslinked) ultra-pure low-density polyethylene (LDPE). A 100-fold decrease in electrical conductivity can be achieved by adding 1−3 wt.% of well-dispersed inorganic nanoparticles ...
Shima L. Holder, Mattias E. Karlsson, Richard T. Olsson, Mikael S. Hedenqvist, Fritjof Nilsson   +4 more
doaj   +1 more source

control-protection-grids-tudelft/HVDC-RTDS-models: HVDC_models

<p>HVDC/AC models with the European ratings.</p ...
HVDC/AC Control, Aleksandra Lekić, Ajay
core   +1 more source

MMC Stored Energy Participation to the DC Bus Voltage Control in an HVDC Link [PDF]

, 2016
The modular multilevel converter (MMC) is becoming a promising converter technology for HVDC transmission systems. Contrary to the conventional two- or three-level VSC-HVDC links, no capacitors are connected directly on the dc bus in an MMC-HVDC link ...
SAMIMI, Shabab, COLAS, Frédéric, BELHAOUANE, Mohamed Moez, GUILLAUD, Xavier, DELARUE, Philippe, GRUSON, Francois   +5 more
core   +1 more source

Assessment of arc current extinction time of transient faults in HVDC-VSC systems with hybrid DC breakers

, 2023
The interest in half-bridge Voltage Source Converters (VSCs) with HVDC circuit breakers is a solution to manage transient faults when the link is fully or partially made with an overhead line.
Patti, S., Marzinotto, M., De Maria, S., Graziani, M., Lauria, S., Palone, F., Gatta, F. M.   +6 more
core   +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

Black-start of remote areas through SCR-based HVDC Links

, 2021
This paper analyses the possibility to black-start a remote area using an existing Line Commutated Converter HVDC link.To do this, a relatively small size Voltage Sourced Converter must be installed at the link receiving-end.
Sani L., Luca Sani, Barsali S., Pelacchi P., Ceraolo M., Paolo Pelacchi, Massimo Ceraolo, Stefano Barsali   +7 more
core   +1 more source

DC Side Impedance Modelling of an Actual Line Commutated Converter High Voltage Direct Current System and DC Resonance Characteristics

High Voltage, EarlyView.
ABSTRACT The stability analysis of Line Commutated Converter High Voltage Direct Current (LCC‐HVDC) is of considerable engineering importance. Establishing its analytical mathematical model helps to analyse stability and the factors that affect stability of the system.
Juanjuan Wang, Juntao Liu, Qingming Xin, Ze Mo, Baixian Ye, Yuekun Liu, Chuang Fu   +6 more
wiley   +1 more source

Enhancing Hydrophobic Stability of Silicone Rubber Insulators Under High‐Voltage Direct Current Stress Through Optimised Nano‐Fumed Silica Surface Area: A Dynamic Drop Test Study

High Voltage, EarlyView.
ABSTRACT The long‐term hydrophobic stability of silicone rubber (SiR) insulators is essential for their reliability in high‐voltage direct current (HVDC) applications. This study investigates the effect of nano‐silica fillers with varying specific surface areas (SSA = 120, 200 and 300 m2/g) and different concentrations of alumina trihydrate (ATH ...
Mahmoud A. Ali, Xingliang Jiang, Samir I. Gadow, Ruta W. Deusdedith   +3 more
wiley   +1 more source