Production facilities for large turbine generator stator coils

1971 ◽  
Author(s):  
L. W. Boss ◽  
R. J. Hillen
Keyword(s):  
Turbine Generator ◽  
Generator Stator ◽  
Production Facilities

Copper Deposition in Stator Cooling Water Systems

2014 ◽  
Author(s):  
A. G. Howell
Keyword(s):  
Cooling Water ◽  
Water Systems ◽  
Alkaline Ph ◽  
Low Oxygen ◽  
Turbine Generator ◽  
Cooling Flow ◽  
Flow Restriction ◽  
Flow Circuit ◽  
Generator Stator ◽  
Ph Elevation

Water cooled steam turbine-generator stator systems are subject to flow restrictions and pluggage by copper that originates from within the stators. Deposition may occur within hollow stator bars or coils, or in filters or screens in the water flow circuit. In extreme cases of deposition, flow restriction can cause the generator to overheat due to reduction of cooling flow, resulting in unit outages and potentially serious equipment damage. Chemistry programs to minimize corrosion and transport of copper within the system include high oxygen, low oxygen, and alkaline (pH elevation). In all cases high purity water is required for the application. Examination of copper deposits can provide clues to the adequacy of the chemistry treatment program for minimizing system corrosion.

Experience With On-Line Continuous Monitoring of Turbine Generator Stator and Rotor Windings

2008 ◽  
Author(s):  
G. Stone ◽  
B. Lloyd ◽  
M. Sasic
Keyword(s):  
Continuous Monitoring ◽  
Turbine Generator ◽  
Utility Industry ◽  
Turbine Generators ◽  
Short Period ◽  
Rotor Flux ◽  
On Line ◽  
Flux Monitoring ◽  
Discharge Monitoring ◽  
Generator Stator

Rotor flux monitoring and on-line partial discharge monitoring are well known tools that help plant owners to detect many developing rotor and stator winding problems in air and hydrogen cooled turbine generators. Both monitors are widely used by the utility industry. Most users periodically monitor the flux and PD using portable instrumentation that is connected to permanently installed sensors for a short period of time, usually once or twice per year. However, since 1994, continuous PD monitoring was commercially introduced, and shortly after, continuous flux monitoring started to be deployed. This paper will describe the continuous winding monitoring systems that are currently in use, and outlines the advantages and limitation of such systems. Case studies of the use of such continuous monitors will also be presented.

A New High-Voltage Insulation for Turbine-Generator Stator Windings

1951 ◽  
Vol 70 (1) ◽  
pp. 721-730 ◽  
Author(s):  
C. M. Laffoon ◽  
C. F. Hill ◽  
Graham Lee Moses ◽  
L. J. Berberich
Keyword(s):  
High Voltage ◽  
Turbine Generator ◽  
Stator Windings ◽  
High Voltage Insulation ◽  
Generator Stator
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