Results 41 to 50 of about 5,287 (159)

Study on overvoltage characteristics and arrester configuration strategy for ±1 100 kV HVDC transmission lines

The Journal of Engineering, 2018
Overvoltage caused by faults or switching is one of the decisive factors affecting the insulation level of equipment in UHVDC transmission systems.
Xiaoguang Zhu, Yichen Liu, Junbo Deng, Fang Yu, Jiangtao Li, Jie Guo, Guanjun Zhang   +6 more
doaj   +1 more source

Evaluating Thermal Insulation Strategies for High-Rise Residential Buildings in Sarajevo

Energies
Aging residential buildings in urban areas require effective thermal insulation to enhance energy efficiency and indoor comfort. In Bosnia and Herzegovina (BiH), expanded polystyrene (EPS) is the most commonly used insulation material due to its ...
Florian Teichmann, Azra Korjenic, Lamija Balić, Mirela Idrizović, Aldin Turković, Amir Ljubijankić, Venera Simonović, Sanela Klarić   +7 more
doaj   +1 more source

Impact of Transformer Grounding On TRV During Inductive Load Switching at Transmission and Substation Service Unit (ULTG) Maros

Jurnal Nasional Teknik Elektro
This paper investigates the impact of transformer grounding configurations on Transient Recovery Voltage (TRV) during fault current interruption in high-voltage power systems. The study evaluates three grounding schemes: Solid–Solid, Solid–Floating, and
Muhammad Khaidir, Sriwati, Saktiani Karim, Faridah, Fadhli Rahman, Syarifuddin Baco   +5 more
doaj   +1 more source

Reversible dielectric polymers with switchable conduction and insulation for electrostatic protection

Nature Communications
The pursuit of power density and integration in advanced electronic devices poses a risk of electrostatic discharge to traditional packaging materials. Albeit optimizing the insulation performance of packaging materials seems to be an effective strategy,
Huasong Xu, Congzhen Xie, Hui Chen, Tianyi Luo, Daoming Zhang, An Zhong, Chunhui Bi, Bin Gou, Jiangang Zhou, Qingyu Wang, Xiao Yang, Shuangwu Huang, Yingqi Yi, Yongjun Zhang, Yongxia Han, Xiao Matthew Hu, Rui Wang   +16 more
doaj   +1 more source

Breakdown Characteristics of Unequal Sphere–Sphere Electrode Configuration Under DC Stress

Engineering Proceedings
Failure of air gap insulation is one of the prominent issues in insulation coordination for outdoor applications. Though uniform electric field distribution is desirable, the difficulty in achieving it often makes insulation engineers settle for weakly ...
Indhulekha Jayachandran, Gowrishankar Shanmugam   +1 more
doaj   +1 more source

Ambient-Dried Silica Xerogels with Enhanced Strength and Thermal Insulation via Calcium Ion-Glycerol Synergistic Crosslinking

Gels
Despite their high porosity and wide applicability, silica xerogels face mechanical strength limitations for high-performance applications. This study presents an ambient-pressure sol-gel strategy utilizing calcium-glycerol synergy to produce robust ...
Xiaoyu Xie, Zilin Zhu, Yu Meng, Lijia Wang, Fuquan Zhao, Lingqing Chen, Lijie Jiang, Ming Yan, Xiaofan Zhou   +8 more
doaj   +1 more source

Experimental study on flashover voltage characteristics of different arresters at high altitudes and construction of correction models

AIP Advances
The unique atmospheric conditions in high-altitude regions significantly affect the external insulation performance of electrical equipment, and existing altitude correction methods struggle to accurately reflect the flashover characteristics of ...
Zhilin Su, Runyu Shi, Liang Ma, Qiangba Zhuoga   +3 more
doaj   +1 more source

Modernizing Outdoor Substation Design by the Novel Application of Probabilistic Design Principles

IEEE Access
This paper proposes a structured design methodology for Air Insulated Switchgear (AIS) substations with nominal voltages exceeding 45 kV, specifically for configurations employing stranded flexible conductors.
Abraham Johannes Smit Groenewald, Mohamed Fayaz Khan   +1 more
doaj   +1 more source

Management of Zero-Sequence Parameters for Earth Faults on the Power Receiver’s Side in IT-Type Networks

Energies
This study examines the behavior and control of zero-sequence parameters in IT-type electrical networks under conditions of capacitive insulation asymmetry and complex asymmetric faults on the power receiver side.
Gennadiy Pivnyak, Yurii Stepanenko, Kinga Stecuła, Maryna Kyrychenko, Oleksandra Lysenko, Roman Dychkovskyi   +5 more
doaj   +1 more source

A New Model of Trapped Charge Sources in Switching Transient Studies in the Presence of Shunt Reactors

IEEE Access
Insulation coordination studies are of great importance in power grid reliability. In this paper, a new method is proposed for modeling trapped charge sources (TCS) in switching transient studies.
Mohsen Akafi-Mobarakeh, Reza Shariatinasab, Pierluigi Siano, Behrooz Vahidi, Hamid Reza Najafi   +4 more
doaj   +1 more source