Turbomachinery Package Specification

Titan 250 Generator Set

 

 

5 Generator and Associated Equipment

5.1General Description

For maximum flexibility, the gas turbine package can be provided with several different generator types and voltage outputs to accommodate a broad range of application requirements. The generator, exciter, and control system are integrated to provide optimal performance.

The standard generator type supplied is open drip-proof (ODP) (Figure 6). However the following other enclosure types are available to meet a variety of environmental conditions and cooling requirements:

•Closed air circuit air cooled (CACA)

•Closed air circuit water-to-air cooled (CACW)

•Totally enclosed air-to-air cooled (TEAAC)

•Totally enclosed water-to-air cooled (TEWAC)

Figure 6. Typical Open Drip-Proof Generator with Permanent Magnet Exciter System

5.2Functional Description

During generator operation, three-phase AC power generated by the exciter armature is converted to DC power by a rectifier. The DC output from the rectifier is applied as field excitation current to the generator rotor windings to create magnetic flux. The generator voltage output is controlled by the generator field current and the generator field current is controlled by a brushless exciter. The amount of DC current applied to the exciter field determines the exciter output voltage. A potential transformer senses the bus potential and provides a signal to the combined generator control module (CGCM) for excitation control.

© 2008 Solar Turbines Incorporated. All rights reserved.

TPS250GS/908 - Preliminary

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