Results 101 to 110 of about 437 (152)
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A Digital Governor for Hydrogenerators
IEEE Transactions on Energy Conversion, 1988The authors describe the development and testing of a microcomputer-based digital governor for hydrogenerators. The digital governor was shown to approximate the control function of existing analog controllers. This task was performed as a first step to future work intended to utilize the versatility of microcomputers in effecting more sophisticated ...
L Wozniak
exaly +2 more sources
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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Determination of the Leakege Parameters of Synchronous Hydrogenerators
2020 21st International Symposium on Electrical Apparatus & Technologies (SIELA), 2020An 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.
Vultchan Gueorgiev, Plamen Rizov
exaly +2 more sources
Optimal PID Gain Schedule for Hydrogenerators-Design and Application
IEEE Transactions on Energy Conversion, 1989The development and testing of a digital gain switching governor for hydrogenerators are described. Optimal gains are found at different load points by minimizing a quadratic performance criterion prior to controller operation. During operation, the gain sets are switched in depending on gate position and speed error magnitude.
L Wozniak
exaly +2 more sources
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521), 2004
The extended testing of hydrogenerator (rated 35 MVA) was made because the generators working age expired and it was going to be replaced with new one. This was the perfect opportunity to do some specific and not usual testing. The complicated testing plan was designed in order to enable recording as much relevant data as possible (electrical ...
Z. Zebic, Z. Maljkovic, M. Pavlica
openaire +1 more source
The extended testing of hydrogenerator (rated 35 MVA) was made because the generators working age expired and it was going to be replaced with new one. This was the perfect opportunity to do some specific and not usual testing. The complicated testing plan was designed in order to enable recording as much relevant data as possible (electrical ...
Z. Zebic, Z. Maljkovic, M. Pavlica
openaire +1 more source
Experimental model of a hydrogenerator with static excitation
2011 IEEE EUROCON - International Conference on Computer as a Tool, 2011In this paper is presented an experimental model for an hydro aggregate with synchronous generator having static excitation. The model was designed and achieved in the laboratory at reduced scale, of 12 kVA, using a VI — LabVIEW environment. With the help of this model there might be experimentally studied the dynamic conditions of the real hydro ...
Marius Biriescu +6 more
openaire +2 more sources
New Design of Hydrogenerator Poles.
RE&PQJ, 2023HydrogeneratorThe excess of reactive power generated by power transmission lines is the reason for impermissible increase of voltage at the terminals of the length power transmission lines for consumers. One of the alternative decisions for this problem could become at the hydropower station hydrogenerators, specially designed or reconstructed for ...
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Dynamics of Large Hydrogenerators
1996Based on experimental data, this paper shows that the mathematical models of large hydrogenerators, used to preview the dynamic behavior at the design phase or as a predictive maintenance tool at the operation phase, must include the effects of the stiffness and damping forces of the oil film in the guide bearings.
G. C. Brito +2 more
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