Results 241 to 250 of about 1,204,933 (307)
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IEEE Transactions on Power Delivery, 2019
A reduced-order dynamic phasor model of modular multilevel converter (MMC) in long time scale, which is applied for power system low-frequency oscillation analysis, is investigated.
Shu Zhu +7 more
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A reduced-order dynamic phasor model of modular multilevel converter (MMC) in long time scale, which is applied for power system low-frequency oscillation analysis, is investigated.
Shu Zhu +7 more
semanticscholar +1 more source
Low-frequency, low-distortion digital quadrature oscillator
Journal of Physics E: Scientific Instruments, 1989Digital recursive and non-recursive filtering techniques have both been exploited to build a low-frequency (0.5-50 Hz), low-distortion digital quadrature oscillator. This generator shows an amplitude constant to within 0.3% over the frequency range, and the quadrature phase error is within +or-0.05 degrees .
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IEEE Transactions on Power Systems, 2018
The traction blockade in depots of multiple electric multiple units (EMUs) is generally considered to be caused by the voltage low frequency oscillation (LFO) of the high-speed railway traction network.
Zhigang Liu, Z. Geng, X. Hu
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The traction blockade in depots of multiple electric multiple units (EMUs) is generally considered to be caused by the voltage low frequency oscillation (LFO) of the high-speed railway traction network.
Zhigang Liu, Z. Geng, X. Hu
semanticscholar +1 more source
Low-frequency diffusion flame oscillations
Combustion and Flame, 1975Abstract The low-frequency oscillation that is characteristic of small-scale diffusion flames is also shown to dominate the so-called turbulent flamebrush even at flowrates high enough to lift the flame from the burner. For free diffusion flames, the frequency of oscillation is always of the order of 10 Hz and is not affected by either the dimensions
A.J. Grant, J.M. Jones
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Amplitude stabilized low frequency oscillator†
International Journal of Electronics, 1972Abstract The paper describes an amplitude stabilized very low frequency sinusoidal oscillator generating a frequency as low as 0.01 Hz. It uses a second-order all-pass network and an operational amplifier interconnected in a feedback loop to form a highly selective amplifier.
S. K. DAS, GITA DAS
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IEEE Transactions on Transportation Electrification, 2018
In recent years, low-frequency oscillation (LFO) events sometimes occur between the traction network and the electric motive units (EMUs) in vehicle-grid systems of a high-speed railway when multiple EMUs access the traction network.
Zhigang Liu, X. Hu, Y. Liao
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In recent years, low-frequency oscillation (LFO) events sometimes occur between the traction network and the electric motive units (EMUs) in vehicle-grid systems of a high-speed railway when multiple EMUs access the traction network.
Zhigang Liu, X. Hu, Y. Liao
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Thermally induced low-frequency oscillations
ZAMP Zeitschrift f�r angewandte Mathematik und Physik, 1985This paper discusses nonlinear thermally induced oscillations in quasi- one dimensional flows in ducts. In practice such oscillations are frequently observed in furnaces and combustion chambers. The problem considered involves entropy disturbances which are convected through a nozzle at the end of a tube, thereby producing an acoustic wave which ...
Keller, J. J., Egli, W., Hellat, J.
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IEEE transactions on industry applications, 2018
With the increasing number of electric locomotives and electric multiple units (EMU) operating in one power section simultaneously, low-frequency oscillation (LFO) may occur.
Keteng Jiang, Chengxiang Zhang, X. Ge
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With the increasing number of electric locomotives and electric multiple units (EMU) operating in one power section simultaneously, low-frequency oscillation (LFO) may occur.
Keteng Jiang, Chengxiang Zhang, X. Ge
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A Practical Approach to Mitigate Low-Frequency Oscillation in Railway Electrification Systems
IEEE transactions on power electronics, 2018The low-frequency oscillation (LFO) phenomenon has frequently happened in the railway electrification systems (RES), which often caused the traction atresia of electric trains and protection malfunction of traction network.
Haitao Hu +4 more
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Improved Adaptive Inertia Control of VSG for Low Frequency Oscillation Suppression
IEEE Power Engineering and Automation Conference, 2018To deal with the low frequency oscillation (LFO) of microgrid caused by power fluctuation and grid faults, virtual synchronous generator (VSG) as an effective solution has been intensively researched.
Xin Li, Guo-zhu Chen
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