Results 241 to 250 of about 266,119 (301)

Sensing Spin Precession with Free Electrons. [PDF]

ACS Nano
Jaroš A, Seifner MS, Toyfl J, Czasch B, Beltrán-Romero S, Bicket IC, Haslinger P.   +6 more
europepmc   +1 more source

Sensilla Trichoidea-Inspired, High-Temperature, and Omnidirectional Vibration Perception Based on Monolayer Graphene. [PDF]

Nanomicro Lett
Li Y, Chen D, Tang X, Yu P, Sun J, Li X, You Q, Zhu M, Gao C, Li L, Tian H, Deng T.   +11 more
europepmc   +1 more source

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Experience with Supplementary Damping Signals for Generator Static Excitation Systems

IEEE Transactions on Power Apparatus and Systems, 1973
Virtually all hydraulic generating units installed in Ontario Hydro since 1964 have been equipped with static excitation systems, necessitating supplementary stabilizing signals to suppress power oscillations. This paper reviews the experience gained with alternative types of stabilizing systems at these stations and discusses advantages and ...
Wilfred Watson, Gerald Manchur
openaire   +3 more sources

Virtual Instrumentation use in static excitation systems

2012 XXth International Conference on Electrical Machines, 2012
In the paper is presented a Virtual Instrumentations System developed for the control and dynamic behavior study of a hydro aggregate with synchronous generator with salient poles, having static excitation. The purpose of the work was the achievement of an experimental model of hydro-plant on LabVIEW environment based, that allow to implement various ...
M. Biriescu, G. Liuba, L. Augustinov, G. Madescu, V. M. Nedelea, M. Mot   +5 more
openaire   +1 more source

Stabilization of statically unstable systems by parametric excitation

Journal of Sound and Vibration, 2009
A linear vibrational system with multiple degrees of freedom subjected to parametric excitation is considered. It is assumed that the system is statically unstable but close to a critical point, the excitation amplitude and damping are small, and the excitation frequency is arbitrary.
Alexei A. Mailybaev, Alexander P. Seyranian   +1 more
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Adaptive and robust controls for static excitation systems

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2015
Purpose – Oscillations and related stability problems of synchronous generators are harmful and can lead to power outage. Studies have shown that currently available commercial applications of power system stabilizers (PSSs) do not ensure damping of modern generators operating in contemporary power systems at peak performances.
Jožef Ritonja, Drago Dolinar, Boštjan Polajžer   +2 more
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Alternate solutions to replacing aged static exciter systems

Conference Record of 2008 54th Annual Pulp and Paper Industry Technical Conference, 2008
Over the years, many rotating exciters have been replaced for static exciters on synchronous machines. As these replacement static exciters age, much of the analog hardware becomes obsolete and can no longer be supported by the manufacturer, again forcing the replacement of the entire excitation system.
Richard C. Schaefer, Thomas Eberly
openaire   +1 more source