Results 101 to 110 of about 7,321,935 (205)

Electromagnetic processes and conditions of occurring resonance overvoltage in power transformer windings

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
The relevance of the study: At the present stage of CIS countries network development the problem of increase the operation reliability of transformers, which main part has been already out of date is of the first-priority. The problem is also up to date
Myroslav Sabat, Aleksey Nykonets, Vladimir Venger, Viktor Venger   +3 more
doaj   +2 more sources

Study and protection of lightning overvoltage on DC cables of solar power generation

, 2014
In this paper, lightning induced overvoltage on DC cables of solar power panel, which was laid on the ground and an underground level with proper insulation thickness, was investigated when a lightning strike at a nearby place and its proper protection ...
Ahmed, Md Raju, Md. Raju Ahmed, Hossain, Md Alamgir, Md. Alamgir Hossain   +3 more
core   +1 more source

Frequency Scanning-Based Simplified Overvoltage Prediction Method for SiC Inverter-Fed Motor Drives in Electric Vehicles

World Electric Vehicle Journal
Wide-bandgap power devices, particularly silicon carbide (SiC) MOSFETs, have seen widespread adoption in electric vehicle (EV) motor drive systems due to their superior switching characteristics, including high switching speeds and high switching ...
Yipu Xu, Xia Liu, Chengsong Li, Wenjun Chen, Jiatong Deng   +4 more
doaj   +1 more source

Suppression of transient overvoltage in renewable energy transmission terminal by grid-forming based reactive power compensation

Line commutated converter based high voltage direct current (LCC-HVDC) is the key to large-scale grid connection and long-distance transmission of renewable energy. However, faults such as DC blocking and commutation failure may lead to short-term excess
HUA Zhuhu, ZHANG Gaomin, TANG Wangqianyun, SU Shi, SHANG Lei, TANG Xiaoqian   +5 more
core   +1 more source

Establishment Mechanism of Power-Frequency Follow-Current Arc on Medium-Voltage Insulated Conductors Under Lightning Overvoltage

Inventions
Lightning-induced breaking accidents of medium-voltage insulated conductors pose a serious threat to the safety of distribution networks, and the key cause lies in the establishment and sustained combustion of the power-frequency follow-current arc after lightning overvoltage breakdown. This paper systematically investigates the formation mechanism and
Xin Ning, Rui Yu, Longchen Liu, Jiayi Wang, Jingxin Zou, Hao Wang, Tian Tan, Huajian Peng, Xin Yang   +8 more
openaire   +1 more source

Development of a Power Factor Corrected High Current Supercapacitor Charger for a Surge Resistant UPS [PDF]

, 2012
The Uninterrupted Power Supplies (UPSs) provide short term power back up to electrical loads when the mains power fail. Usually UPSs employ battery packs as the energy storage device.
Zhang, Xu
core  

Optimization of reactive power in high-voltage AC transmission systems for long-distance offshore wind power using high-voltage shunt adjustable reactor

International Journal of Electrical Power & Energy Systems
High-voltage shunt reactor (HVSR) is essential for the high-voltage AC transmission system of long-distance offshore wind power to achieve in-situ reactive power balancing and to limit industrial frequency overvoltage.
Li Peng, Kanghang He, Longfu Luo, Jingyu Yang   +3 more
doaj   +1 more source

Experimental Research of the Overvoltage in the Insulated Neutral Network

The isolated neutral network isolation resistance is often affected by the lightning discharge surge to the line cables or towers. Several overvoltage waves are maid at the moment of the lightning discharge surge.
Gvozdas, Vitalijus, Valatka, Povilas
core  

Overvoltage Suppression Filter Development for GaN Inverter-Fed Electrical Drive with Long Cable Based on Impedance Measurement

Wide-bandgap transistors have short voltage rise and fall times, thus leading to overvoltage at the end of the cable connecting the inverter and the motor.
Kaspars Kroičs, Jānis Voitkāns
core   +1 more source

Research on motor overvoltage issues in metallurgical environments using three-level inverters

Metalurgija
Industries such as nuclear power plants and underground mining are characterized by space constraints,forcing the use of long-wire cables to power motors.The impedance mismatch between long-wire cables and motors leads to overvoltage phenomena at motor ...
L. L. Meng, W. Dai
doaj