Results 121 to 130 of about 550 (166)

Report of dielectric tests on a large hydrogenerator

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1956
THE OBJECT of the tests was to gather information regarding the characteristics of the insulation of a large generator winding. The tests also provided an opportunity to evaluate new test equipment and test methods. In particular, it was desired to evalute certain factors which may influence the results of various dielectric tests.
C. A. Duke, C. W. Ross, J. S. Johnson
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Upgrading of hydrogenerator excitation systems

2000 Canadian Conference on Electrical and Computer Engineering. Conference Proceedings. Navigating to a New Era (Cat. No.00TH8492), 2002
Whereas hydroelectric stations are continuing to deliver low-cost energy, in some cases after 75 years' service, certain peripherals of the generation units become obsolete after thirty years. Excitation systems in particular have required partial or total replacement, to provide: more stringent voltage regulation, enhanced stability of the sytems ...
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Step response of a governed hydrogenerator

Proceedings of the Institution of Electrical Engineers, 1978
Stable control of the frequency in an electrical power system is essential to ensure continuity of supply. It is determined by the combined effect of the speed governors fitted to the generating sets throughout the system. The power output response of a steam-driven set to sudden loss in generating capacity is initially fast, but, after a few seconds ...
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Hydrogenerator Monitoring

2004
U studiji se mogu se prepoznati dva karakteristična dijela, studijski i istraživački. U studijskom dijelu, koji obuhvaća 2. i 3. poglavlje, najprije se daje pregled stanja i razvoja monitoringa hidroagregata, što je temeljeno na dostupnoj literaturi te na iskustvima svjetskih i domaćih tvrtki iz tog područja.
Rajković, Borivoje, Meško, Boris, Jadrić, Martin, Terzić, Božo, Orešković, Goran, Despalatović, Marin, Firinger, Vladimir   +6 more
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Global sensitivity analysis applied to an hydrogenerator

2016 IEEE Conference on Electromagnetic Field Computation (CEFC), 2016
In this communication, a methodology based on a stochastic approach is proposed in order to characterize the effect of imperfections on the dimensions of a rotating electrical machine on on the time evolution of the signal of magnetic flux sensors. The methodology is based on an approximation of sparse polynomial chaos basis and Sobol indices to carry ...
Thu Trang Nguyen, Hung Mac, Stephane Clenet, Eilin Guillot   +3 more
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Solution to Increase the Hydrogenerator Mean Power

Waterpower '99, 1999
The paper aims to find a new solution for the power hydrogenerators (66 MVA) cooling, in the view of the increase of the power in the power system. This solution proposes the use of thermal tubes when accomplishing the cooler. By applying this method there is aimed the increase of the operating current of the hydrogenerators from 2420 A, (66 % of the ...
Marian Duta, Petre Tiriplica
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Determination of the Leakege Parameters of Synchronous Hydrogenerators

2020 21st International Symposium on Electrical Apparatus & Technologies (SIELA), 2020
An application of FEM for studying the leakage of stator slots of synchronous hydrogenerators is presented. The approach presented takes into account the saturation of the stator teeth and the mutual influence of the current in adjacent stator slots.
Plamen Rizov, Vultchan Gueorgiev
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Parameters and losses of hydrogenerator damping systems

Proceedings of the Institution of Electrical Engineers, 1978
The paper shows the necessity for: more exact methods to calculate and measure the parameters and damping system losses of highly utilised hydrogenerators; a more exact method for measuring the damping rod currents, by means of Hall's generators, and for the design of a current measurer and the measuring circuit, and a new method to calculate losses in
E. Chiricozzi, R. Hagopian, A. Nazarian
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Maximum-Slew-Rate Control for Hydrogenerators

Journal of Engineering for Gas Turbines and Power, 1987
Traditionally, speed control of hydrogenerators has been implemented by analog proportional-plus-integral control of speed error. With digital controllers, nonlinear, adaptive control strategies may be implemented to achieve improved systems response. This paper develops a control scheme which responds to perturbations by moving wicket gates at their ...
J. Jaeger, L. Wozniak
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Tests of a vacuum gauge for an HTS hydrogenerator

Proceedings of 14th International Power Electronics and Motion Control Conference EPE-PEMC 2010, 2010
The paper describes the methodology, test rig and results of vacuum gauge tests under rotational conditions. The gauge is dedicated to measurements of vacuum in the rotor of an HTS power generator. The tests were performed using a dedicated test rig where the data of the measurements were transmitted using a Bluetooth device.
Boguslaw Grzesik, Mariusz Stepien, Krzysztof Bodzek, Ruben Fair, Martin Ingles   +4 more
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