Results 141 to 150 of about 48,204 (247)

Radio Interference Prediction Method for EHV AC Transmission Lines at High Altitudes Based on Long‐Term Observations

High Voltage, EarlyView.
ABSTRACT Radio interference (RI) is a critical factor in the design of extra‐high voltage (EHV) transmission lines at high altitudes. To address the insufficient field data of RI on high‐altitude transmission lines, the lack of adequate validation for existing RI prediction methods, and the difficulty in assessing RI levels under various meteorological
Yemao Zhang, Baoquan Wan, Yao Lu, Xingfa Liu, Bing Zhou, Jilai Xu, Hao Wan   +6 more
wiley   +1 more source

Dynamic Behaviour of Bubbles in Oil Under Electrothermal Ageing

High Voltage, EarlyView.
ABSTRACT During long‐term operation of converter transformers, the internal oil–pressboard insulation undergoes irreversible degradation. Partial discharge in the weakened insulation will cause the formation of a large number of bubbles in the insulating oil.
Hongbin Wu, Zhaoyang Kang, Ze Li, Zhongyu Zhao, Shuqi Li, Fuqiang Ren, Hongshun Liu, Qingquan Li   +7 more
wiley   +1 more source

Combustion Performance of Silicone Rubber Polymer Insulation Material Under Damp‐Heat Ageing Conditions: Molecular Insights Into the Effects of Structural Changes on Macroscopic Properties

High Voltage, EarlyView.
ABSTRACT Silicone rubber (SR), an organic silicon polymer material, is known for its excellent heat resistance and mechanical properties. It is widely used in composite insulators and cable accessory materials. However, the ageing caused by humidity and heat significantly impacts its performance, an issue that cannot be ignored. This paper investigates
Wenyu Ye, Xinhan Qiao, Wentian Zeng, Le Yu, Yinfu Chen, Ke Xu, Jianwen Zhang   +6 more
wiley   +1 more source

Direct Experimental Evidence of Transient Au^δ+ Oxide in Au Electrooxidation. [PDF]

J Am Chem Soc
Redondo J, Etxebarria A, Samal PK, Albons L, Climent RF, Auras S, Šmíd B, Ju X, Matvija P, Schiller F, Setvín M, Mysliveček J, Barja S.   +12 more
europepmc   +1 more source

Influence of Arc Faults on Pressure Production Characteristics in AC Turret of UHV Transformers

High Voltage, EarlyView.
ABSTRACT The overpressure caused by arc fault in the oil tank can lead to a transformer explosion. Since the AC turret of transformers serves to connect the transformer windings with the AC busbar, the arc current can be extremely high if an earth fault arc occurs leading to potentially hazardous pressure.
Yuhang Li, Yuanxiang Zhou, Guimin Jiang, Licheng Lu, Hongchuan Dong   +4 more
wiley   +1 more source

Adventitious carbon breaks symmetry in oxide contact electrification. [PDF]

Nature
Grosjean G, Ostermann M, Sauer M, Hahn M, Pichler CM, Fahrnberger F, Pertl F, Balazs DM, Link MM, Kim SH, Schrader DL, Blanco A, Gracia F, Mujica N, Waitukaitis SR.   +14 more
europepmc   +1 more source

Research on Ultra‐Wideband Pulse Current Method for DC Partial Discharge Measurement

High Voltage, EarlyView.
ABSTRACT The conventional pulse current method is commonly used in AC or DC withstand voltage tests with partial discharge (PD) monitoring. Because of its relatively narrow measurement bandwidth, this method tends to ignore critical information in PD waveforms, making it difficult to eliminate pulse‐type interference under DC voltage conditions, where ...
Kaining Hou, Zhaoyang Kang, Dongxin He, Hongshun Liu, Qingquan Li   +4 more
wiley   +1 more source

Spontaneous Room-Temperature Solid-State Reaction at the MoS₂/Ti Interface: Implications for Contact Engineering. [PDF]

ACS Appl Nano Mater
Karim B, Pirker L, Plšek J, Valeš V, Vondráček M, Hanušová M, Zólyomi V, Gastaldo M, Bajpai A, Ziewer J, Huang F, Honolka J, Frank O, Velický M, Kalbáč M.   +14 more
europepmc   +1 more source

Corrosion Failure Analysis of Contactor Type Electrical Connection Components Used in Converter Valve Side Bushings

High Voltage, EarlyView.
ABSTRACT As a commonly used bushing current‐carrying structure in recent years, contactor‐type electrical connection parts operate in a complex environment of electric, thermal and chemical corrosion for extended periods. With the increase of ultra‐high voltage (UHV) transmission capacity, its operating environment faces more stringent challenges, and ...
Qingyu Wang, Tao Xie, Shoufeng Jin, Huidong Tian, Xiaoyu Zhou, Shifeng Shi, Kanghang He, Juzhen Wu, Peng Liu, Zongren Peng   +9 more
wiley   +1 more source

Transforming Schottky to Ohmic Contacts via Ultrahigh-Vacuum Engineered Interfacial Alloying. [PDF]

ACS Appl Mater Interfaces
Ebrahimzadeh M, Piispanen P, Granroth S, Miettinen M, Angervo I, Liu H, Otsus M, Punkkinen R, Punkkinen M, Vähänissi V, Kokko K, Paturi P, Kukli K, Savin H, Laukkanen P.   +14 more
europepmc   +1 more source