Results 181 to 190 of about 7,321,935 (205)

Overvoltages in inverter fed induction machines using high frequency power electronic components

Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94, 2002
Inverter supplied induction motors have become common. One of the tendencies that can be observed over the years, is that the switching frequencies of the power electronic components increase. This allows the manufacturers to build more compact inverters with an improved sinusoidal wave shape of the output voltage and/or current.
P. Van Poucke, R. Belmans, W. Geysen, E. Ternier   +3 more
openaire   +1 more source

Comparative Study of Transient Overvoltage of Wind Turbine Units in the Case of Power Grid Faults at the Sending End of Low-Frequency Transmission and MMC HVDC Transmission of far-sea Wind Power

2025 IEEE 8th International Conference on Information Systems and Computer Aided Education (ICISCAE)
Chao Liu, Yanxun Gu, Shijiang Liao, Yahao Chen, Guangda Wu   +4 more
exaly   +2 more sources

High frequency FEM-based power transformer modeling: Investigation of internal stresses due to network-initiated overvoltages

Electric Power Systems Research, 2007
This paper presents a method of how to obtain both terminal and internal high frequency models of power transformers using FEM. The model is established from construction information and the approach implements frequency-dependent phenomena on a physical basis.
E. Bjerkan, H.K. Høidalen
openaire   +1 more source

Frequency of flashovers of clearances in low‐voltage ac power circuits due to overvoltage waves

European Transactions on Electrical Power, 1995
AbstractThe frequency distribution of the crest values of overvoltage waves in low voltage AC power circuits can be approximated by an exponential function. The flashover probability P of a clearance with an impulse withstand voltage Ǔst in an electrical equipment is given by P= exp (‐ α Ǔst). The annual number of flashovers of a single clearance in an
openaire   +1 more source

Transient Power Frequency Overvoltages Transferred to Low Voltage Networks from the EPR of HV and MV Transformer Stations

2007 7th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology, 2007
The transient power frequency overvoltages appearing in the low voltage (LV) supply networks are causing increasing number of damages both in electrical equipment (household, office etc.) containing electronic control parts and in telecommunications apparatus especially in their line cards.
Ladányi, József, Varjú, György
openaire   +1 more source

Study on the Power Frequency Overvoltage and Reactive Power Allocation in Interconnected Offshore HVAC Transmission Systems

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO), 2021
Yiguo Guo, Hang Yang, Huixuan Wang, Chenlei Liu   +3 more
openaire   +1 more source

Research on the influence factors of dominant frequency of switching overvoltage along power cables

IET Conference Proceedings, 2022
J. Li, Z. Ou, C. Nie, C. Xu, L. Zhan, M. Li, T. Li, Z. Liu, J. Deng   +8 more
openaire   +1 more source

A detailed analysis of hotspots and insulation breakdown phenomena in power inductor windings at high frequency regimes: overcurrents and overvoltages

European Transactions on Electrical Power, 2007
AbstractThis research paper is the last of a group of three papers dedicated to the analysis and computation of the high‐frequency electromagnetic behaviour of inductor windings where a multiconductor transmission line approach is used. The present work is essentially concerned with application aspects linked up with the important engineering problem ...
openaire   +1 more source

Power frequency overvoltage protective devices (POPs) for household and similar applications

2021
openaire   +2 more sources

Research on Power Frequency Overvoltage Mechanism and Characteristics of Offshore Wind Farm Transmission System

Smart Grid, 2021
openaire   +1 more source