Results 171 to 180 of about 1,562 (203)

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
openaire   +1 more source

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
openaire   +1 more source

Power frequency overvoltages generated by solar plants

IET Conference Publications, 2009
A 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.
openaire   +1 more source

Simulation of Power Frequency Overvoltage of 500kV Parallel Cable Sheath in Single-Ended Grounding

2024 11th International Forum on Electrical Engineering and Automation (IFEEA)
Jiayin Bian, Hanzhong Cao, Jue Zhang, Weiming He, Zebin He, Yan Xu, Wanlin Quan   +6 more
openaire   +3 more sources

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, DELFANTI, MAURIZIO, PALAZZO, MIRKO, ZICH, RICCARDO   +3 more
openaire   +2 more sources

An Improved Power Transformer High Frequency Model for Transient Overvoltage Studies

2024 IEEE PES 16th Asia-Pacific Power and Energy Engineering Conference (APPEEC)
In modern substations, some impinging transient surges may coincide with a power transformer's natural frequencies. This can cause considerable voltage building-up inside the transformer windings and impose significant stresses to the transformer insulation.
Yao, Shijie, Ma, Hui, Ekanayake, Chandima   +2 more
openaire   +2 more sources

Research on Transient Overvoltage Calculation of Power Frequency Based on Large-scale Direct Current Outgoing Transmission

2024 7th Asia Conference on Energy and Electrical Engineering (ACEEE)
Meng Xiangfei, Gong Haoyue, Han Yi
openaire   +3 more sources

Analysis of Overvoltages in Power Systems Due to Lightning Strikes: On the Effects of the Line Modeling Approach and Frequency-Dependent Soil Properties

2024 59th International Universities Power Engineering Conference (UPEC)
This article presents a comparison considering a more conservative modeling approach (classical) and a more realistic modeling approach (enhanced) for the transient analysis of the overvoltages resulting from lightning strikes in a power system.
Tainá Fernanda Garbelim Pascoalato, Walter Luiz Manzi De Azevedo, Anderson Rircardo Justo De Araújo, Amauri Gutierrez Martins-Britto, Sérgio Kurokawa, José Pissolato Filho   +5 more
openaire   +2 more sources

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

A Cascaded Power Frequency Overvoltage During Joint Alternating Current Fault Ride-Though at Sending End Among Islanding Wind Farms and their Voltage Source Converter-Based High Voltage Direct Current Integration Systems via Simulation

2024 4th International Conference on Electrical Engineering and Control Science (IC2ECS)
Xiaoqiang Sun, Nan Yang, Qinghai Li, Naixin Duan, Meng Wang, Ying Wang, Yilang Jiang   +6 more
openaire   +3 more sources