Results 111 to 120 of about 550 (166)
Treatment of Vibration Problem in Hydro-generator Group in Xiangshui Hydropower Station
Renmin Zhujiang, 2009 BI Ren-you, LI Xu, LI Xun-xin
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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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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.D. Murphy, L. Wozniak, T.A. Whittemore
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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
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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
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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
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Mechanical behavior of hydrogenerator endwindings
IEEE International Electric Machines and Drives Conference. IEMDC'99. Proceedings (Cat. No.99EX272), 2003This paper presents experimental investigations on hydrogenerator endwinding vibrations and temperatures. In steady-state operation, links between machine load, winding mechanical characteristics, and temperature are discussed. Viscoelastic properties of coil composite sections are proved.
A. Jarosz +4 more
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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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Thermographic evaluation of hydrogenerator losses
SPIE Proceedings, 2012The calorimetric method has for a long time been applied for losses measurement and energy conversion efficiency determination in electrical machines. The number of temperature sensors necessary for its successful application in the field constitutes in one of the major drawbacks of the method.
Edson da Costa Bortoni +1 more
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Output Error Identification of Hydrogenerator Conduit Dynamics
IEEE Power Engineering Review, 1989Two output error model reference adaptive identifiers are considered for estimating the parameters in a reduced-order gate position to pressure model for the hydrogenerator. Gradient and sensitivity function identifiers are discussed for hydroelectric applications, and connections are made between their structural differences and relative performance ...
M.A. Vogt, L. Wozniak, T.R. Whittemore
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Hydrogenerator insulation maintenance practices
1983 EIC 6th Electrical/Electronical Insulation Conference, 1983Reliable generation requires a comprehensive preventive maintenance program to locate defects and arrest deterioration on electrical generating equipment. This paper outlines one utility's preventive maintenance and investigative practices on hydro-generator insulation systems and describes experience on some of the major repairs and overhauls.
G. G. McCrae, G. Dang
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