Results 151 to 160 of about 1,406,505 (216)

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

Overvoltage Ruggedness and Dynamic Breakdown Voltage of P-Gate GaN HEMTs in High-Frequency Switching up to Megahertz

Applied Power Electronics Conference, 2022
Surge-energy and overvoltage ruggedness of power devices are desired in many power applications. For the GaN high-electron-mobility transistor (HEMT), a device without avalanche capability, its surge-energy and overvoltage ruggedness are both determined ...
Ruizhe Zhang, Q. Song, Qiang Li, Yuhao Zhang   +3 more
semanticscholar   +1 more source

Simulation of Switching Overvoltages and Validation With Field Tests

IEEE Transactions on Power Delivery, 2018
On transmission lines where switching surges are not mitigated with closing resistors and/or surge arresters, high-speed reclosing on a line with trapped charge will produce high overvoltages that have been measured above 3 p.u. Careful simulations of these switching events using available electromagnetic transient (EMT) programs consistently produce ...
M. Cervantes, A. Ametani, C. Martin, I. Kocar, A. Montenegro, D. Goldsworthy, T. Tobin, J. Mahseredjian, R. Ramos, J. Marti, T. Noda   +10 more
openaire   +2 more sources

GaN MIS-HEMTs in Repetitive Overvoltage Switching: Parametric Shift and Recovery

IEEE International Reliability Physics Symposium, 2022
The overvoltage and surge energy robustness of GaN power high-electron-mobility transistors (HEMTs) is a key gap recently identified by the JEDEC JC-70.1 committee.
Q. Song, J. P. Kozak, Yunwei Ma, Jingcun Liu, Ruizhe Zhang, Roman Volkov, D. Sherman, Kurt V. Smith, W. Saito, Yuhao Zhang   +9 more
semanticscholar   +1 more source

Switching Overvoltage Analysis in Conventional and Unconventional Transmission Lines

2024 IEEE Kansas Power and Energy Conference (KPEC)
Electromagnetic transients are a challenge to manage in power systems. Among these concerns are switching overvoltages, which require meticulous attention from power system designers. Evaluating this transient phenomenon becomes imperative when expanding
Easir Arafat, Mona Ghassemi
semanticscholar   +1 more source

Simultaneous Mitigation of Switching Overvoltage and Oscillation for SiC MOSFET via Gate Charge Injection Concept

IEEE transactions on power electronics
Due to the inherent parasitic inductance and high switching speed, the SiC mosfet generally experience significant overvoltage and oscillation, reducing the voltage margin and causing substantial electromagnetic interference. To mitigate these challenges,
Peng Sun, Xiaofei Pan, Xudong Han, Huayang Zheng, Yuxi Liang, Yihua Hu, Fuli Niu, Zheng Zeng   +7 more
semanticscholar   +1 more source

1.2 kV/25 A Normally off P-N Junction/AlGaN/GaN HEMTs With Nanosecond Switching Characteristics and Robust Overvoltage Capability

IEEE transactions on power electronics, 2021
With a reverse p-n junction in the gate stack design, this work demonstrates a 1.2 kV/25 A normally off p-n junction/AlGaN/GaN high-electron mobility transistor (PNJ-HEMT).
F. Zhou, Weizong Xu, F. Ren, Yuanyang Xia, Leke Wu, T. Zhu, Dunjun Chen, Rong Zhang, Youdou Zheng, Hai Lu   +9 more
semanticscholar   +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, J. W. Skooglund, A. R. Hileman   +2 more
openaire   +1 more source

Switching overvoltages in a three-phase transformer

[1992] Proceedings of the 35th Midwest Symposium on Circuits and Systems, 2003
Switching operations to energize or isolate a transformer result in voltages and currents of complex waveshapes in the transformer windings. The surges transferred to the coupled nonenergized windings when one winding of the transformer is energized are discussed.
C.S. Indulkar, M.S. Thomas, P.R. Bijwe
openaire   +1 more source