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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, 2002Inverter 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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Power Frequency Overvoltage of UHV Power Transmission Lines
2017Compared 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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Impact of 750kV Transmission Line Series Compensation Capacity on Power Frequency Overvoltage
Advanced Materials Research, 2014The overvoltage calculation of 750kV transmission line with series compensation has great significance on the design, insulation coordination and protection of the line. In this paper, a transient model of 750kV power transmission system with series compensation is established.
Ding Jun Wen +4 more
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Power frequency overvoltages generated by solar plants
IET Conference Publications, 2009A new kind of overvoltage, not covered by present standards, has been detected in solar plants when switching the inverters off. This power frequency overvoltage can be transmitted to the MV network, giving rise to damages to some pieces of low voltage electronic equipment.
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Reduction of high-frequency transient overvoltages in power stations with generator circuit-breakers
2012 Asia-Pacific Symposium on Electromagnetic Compatibility, 2012Today 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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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), 2002For 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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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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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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2019 4th IEEE Workshop on the Electronic Grid (eGRID), 2019
The half-wavelength transmission line (HWTL) is a forward-looking and competitive solution for transcontinental and transnational power transmission. The problem of steady-state power frequency overvoltage of HWTL is serious. It is a matter of great concern in the safety and stability analysis of the power system connected with the HWTL. In this paper,
Jun Yi +7 more
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The half-wavelength transmission line (HWTL) is a forward-looking and competitive solution for transcontinental and transnational power transmission. The problem of steady-state power frequency overvoltage of HWTL is serious. It is a matter of great concern in the safety and stability analysis of the power system connected with the HWTL. In this paper,
Jun Yi +7 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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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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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
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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
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