Results 171 to 180 of about 10,256 (232)

Frequency content of switching overvoltages

Proceedings of the Institution of Electrical Engineers, 1976
Switching overvoltages are usually discussed in terms of their peak values, but their frequency content is also important. The relevant frequencies have now been analysed for certain field-test waveforms as well as for calculated voltage transients that result from energising a single line.
D.F. Binns, H. Habibollahi
openaire   +1 more source

Switching overvoltages in motor circuits

IEEE Transactions on Industry Applications, 2001
The switching of HV motor circuits in the megawatt range can cause large overvoltages on motor terminals. The amplitude of the resulting voltage spikes depends on breaker type and circuit characteristics. If the amplitude of switching overvoltages exceeds the basic insulation level of the motor, overvoltage protection circuitry should be installed to ...
M. Berth, M. Kung, E.F.D.E. Limbeek
openaire   +1 more source

Switching Overvoltage Measurements and Simulations—Part I: Field Test Overvoltage Measurements

IEEE Transactions on Power Delivery, 2014
This paper presents the work carried out by the IEEE Working Grou[ on field-measured overvoltages and their analysis for validating power system component models to be used in switching transients studies. The work uses measurement data obtained from field tests performed by Bonneville Power Administration in June 1995 where switching overvoltages were
Juan. A. Martinez   +2 more
openaire   +1 more source

Overvoltages caused by disconnect-switch operation

Electrical Engineering, 1959
RECENTLY field tests were performed at the Tanners Creek Station of the Indiana and Michigan Electric Company to investigate overvoltages which were produced when a 1,360-foot section of 345-kv bus was de-energized by an air-break disconnecting switch.1 The high transient overvoltages not only caused severe duty on connected lightning arresters, but ...
S. B. Griscom   +2 more
openaire   +1 more source

Limitation of transmission line switching overvoltages

2010 IEEE International Conference on Power and Energy, 2010
In this paper switching overvoltages of an actual transmission line are studied. Simulations are executed using Electro Magnetic Transients Program. A comprehensive switching transient study is performed for the Azerbaijan province network in Iran. The purpose of this study is to determine the unnecessary pre-insertion resistors in the UHV network ...
Heresh Seyedi, Smko Golabi, Zaher Abam
openaire   +1 more source

Switching Overvoltage of UHVAC Systems

2017
The UHV system is featured by high voltage level and large switching overvoltage amplitude. The increase of the rated voltage and the decrease of the limit standard put forward more rigorous requirements for the limitation measures for the switching overvoltage of the UHV system, and the preventive measures for the EHV system are no longer completely ...
Rongrong Ji, Hao Zhou, Xiujuan Chen
openaire   +1 more source

A Laboratory Equipment for Investigating Switching Overvoltages

International Journal of Electrical Engineering & Education, 1983
A detailed description is given of a transmission line model and voltage source suitable for demonstrating switching overvoltages associated with overhead line energisation. The model is 3-phase with the supply electronically switched independently in each phase and incorporating switched closing resistors.
D. F. Binns, D. Whitehouse
openaire   +1 more source

Mitigation of switching overvoltages in transmission lines via controlled switching

2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008
The goal of this work is to present a controlled switching strategy to reduce overvoltages due to transmission line closing and re-closing. Controlled closing and re-closing of transmission lines eliminates the need of pre-insertion resistors, reducing in this way the costs of transmission line circuit breakers.
Karcius M. C. Dantas   +4 more
openaire   +1 more source

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