Results 111 to 120 of about 1,013 (174)
Power Frequency Overvoltage of UHV Power Transmission Lines
, 2017 Compared to the EHV, the power-frequency overvoltage of the UHV transmission lines is usually more serious, and seriously affecting the power transmission reliability. This chapter first discusses the mechanisms, characteristics, classification, and main influence factors of power-frequency overvoltage of the UHVAC transmission line, then focuses on ...
Hao Zhou, Qiang Yi, Sha Li, Jingzhe Yu
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2010 International Conference on Power System Technology, 2010 By using EMTP, this paper analyzes effect of various factors on power frequency overvoltage during rejecting load in UHV double-circuit transmission system with serious compensation. They include system structure, source capability, scale of power flow, line's operation mode (double-circuit and single-circuit), and compensation degree of series ...
null Yuanyuan Zhang +3 more
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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
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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 +3 more
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Application of optical sensors for measurement of high frequency overvoltages in power transformers
2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002 For power utilities and the manufacturers of power transformers, the knowledge of very fast transient overvoltages (VFTO) in the network is of great interest. Indeed, the VFTOs contain frequencies far above those arising in conventional open-air substations and may, for example, be associated with faults or resonance in GIS insulation or in the ...
D. Chatrefou, M. Pristchepa, D. Uhde
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Reduction of high-frequency transient overvoltages in power stations with generator circuit-breakers
2012 Asia-Pacific Symposium on Electromagnetic Compatibility, 2012 Today the use of generator circuit-breakers installed between a generator and the associated step-up transformer is widespread because this offers many advantages with respect to the unit connection (i.e. an arrangement without a generator circuit-breaker) such as simplified operational procedures and better protection of power station equipment ...
D. Braun +3 more
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2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO), 2021 Yiguo Guo +3 more
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The effects of TCPST on power frequency overvoltage in EHV line
2021 International Conference on Power System Technology (POWERCON), 2021 Zuohong Li +6 more
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2022 12th International Conference on Power and Energy Systems (ICPES), 2022 Changhao He +4 more
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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 ...
J. A. Brandão Faria
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