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ABSTRACT
Turboalternators are alternators driven at high rotating speed by a vapor turbine or a gas turbine. The unit power of turbogenerators and the structure of the networks and power stations have considerably evolved since the beginnings of electrification. This article firstly presents the main parts of a turboalternator (stator, rotor, bearings and auxiliary bearings) before focusing on its functioning and in particular on its types of cooling. The vapor turbine remains the most common driving system for high powers and the combustion turbine has undergone a significant progression over the last few years due to its easy implementation and low investment costs.
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Read the articleAUTHORS
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Michel VERRIER: ALSTOM Principal Mechanical Engineer
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Pascal CHAY: ALSTOM Principal Electrical Engineer
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Mathieu GABION: Abylsen Document Engineer - Gilbert RUELLE file update
INTRODUCTION
Turboalternators are alternators driven at high speed by a steam turbine or a gas turbine (more commonly known as a combustion turbine). They feature smooth poles (notches machined by milling) rather than protruding poles.
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Turboalternators
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Bibliography
Standards and norms
The entire series of IEC.60034 standards, in particular :
- Ed.11.0 – Rotating Electrical Machines – part 1: Rating and performance - IEC.60034-1 - 04-04
- Ed.1.0 – Rotating Electrical Machines – part 3: Specific requirements for synchronous generators driven by steam turbines or combustion gas turbines - IEC.60034-3 - 11-07
- Ed.3.0 – Rotating Electrical Machines – part 14: Mechanical...
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Manufacturers – Suppliers – Distributors (non-exhaustive list)
For these large machines, sales are not made through distributors, but the manufacturer generally supplies a turbo-alternator package, comprising the turbine, alternator and often the entire conventional part of the power plant (for nuclear power plants).
Alstom (Europe) http://www.alstom.fr...
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