Turbogenerators
With Top Performance for Steam and Gas Applications
Specifically tailored 4-pole Synchronous Turbogenerators
siemens.com / automation
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Top Performance Turbogenerators
for Steam and Gas Applications
Deriving from a longstanding tradition and extensive know-how
as the world’s leading manufacturer of electrical machines, Siemens has designed a new turbo generator specifically customized for the steam and gas turbine industry.
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Leading Innovative
Technology.
The 4-pole generator incorporates
innovative Siemens technologies such as
MICALASTIC®, optimized rotor dynamics,
ventilation system simulation capability,
and has a proven modular design that
can be adjusted to fit existing foundations as well as gear boxes. The mechanical structure has a long operating life
even under extreme operating
conditions.
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Product description The brushless synchronous generator
has a compact design with low overall
dimensions and weight. Benefiting from
Siemens’ extensive industry know-how,
flexible engineering and 3D CAD systems,
the generator is based on a modular
design concept that shortens delivery
times and enables reduced vibration output. The generator has a cylindrical rotor
and welded housing. The short circuit
current can be maintained for a sufficient
amount of time until the short circuit
protection is activated. Low lifecycle
costs, long maintenance intervals,
high reliability and long service life set
Siemens apart from its competitors.
35000
30000
1500 rpm / 50 Hz
1800 rpm / 60 Hz
kVA
25000
20000
15000
10000
5000
0
6300 V
11000 V
6600 V
13800 V
Basic parameters
Voltage
6.3 – 11 kV / 50 Hz; 6.6 – 13.8 kV / 60 Hz
Speed
1500, 1800 rpm
Power factor
0.8
Degree of protection
IP 23, IP 24W, IP 44R, IP 55, IP 56
Insulation/Utilization
F / F; F / B
Design type
IMB3 (IM1001)
Installation
Indoor, outdoor
AVR
Digital
Excitation
Conventional with auxiliary winding
Cooling method
IC 01, IC 81W , IC 616, IC 31
Bearings
Flanged sleeve bearings (forced lubrication)
Axe height
900, 1060, 1180, 1340 mm
Standards
IEC, EN, DIN, VDE
Optional parameters
Design type
IMB20 (IM1101)
Classification
ABS, DnV, LR, CCS, BV, GL, RMRS
Standards
NEMA, KTA 3702
Excitation
PMG
Ex-protection
Ex nA II acc. To IEC EN 60079-15
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Housing and Stator Core The stator core is built into a rugged
welded housing. It is axially compressed
and held together on the back of the core
by clamping elements. The stator core
consists of high-grade electric sheet steel
laminations that are insulated from each
other by a varnish coat. The three-phase
winding and the auxiliary winding used
to supply the excitation current (if PMG
is not required) are accommodated
in the slots in the stator core. Thanks
to the excellent winding insulation
(MICALASTIC®), the generators are also
suitable for applications with extremely
high humidity.
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Patented and Proven MICALASTIC® Insulation System MICALASTIC® is a proven mica-based
Siemens insulation system for high-rating
high voltage and low voltage generators
and motors. The vacuum pressure impregnation (VPI) method is an important component that has been incorporated in the
overall insulation design. This insulation
system is characterized by its extraordinarily high mechanical strength, dielectric strength, and thermal endurance as
well as durability against contamination,
dirt, moisture and aggressive atmospheres which ensures a long winding
lifetime even in the toughest conditions.
Rotor
The rotor design is based on a laminated
cylindrical rotor core pressed onto the
forged shaft with a cylindrical shaft end
for the coupling hub. The rotor winding
is a flat-wire compact winding inserted
into the rotor slots. The coils are secured
by slot wedges in the active components
and by bandages on the overhang elements. Copper damper bars are pressed
into the core for smooth operation and
resistance against load changes. In addition to the field and damper winding the
rotor is equipped with a shaft driven fan,
the exciter rotor and a rotating rectifier
block.
Damper Winding Each rotor is equipped with a generously
dimensioned damper winding for smooth
parallel operations and effective damping
in the case of unbalanced loads. Damper
copper bars and pressure plates on both
sides of the rotor core are welded
together to create a damper cage. This
damper cage ensures that the generator
has effective damping for transient
oscillations that can occur during parallel
operation with large load changes
(load switch on / off).
Bearings
The generator rotor is secured by two
sleeve bearings, allowing easy inspection
and maintenance without having to dismantle the machine. Either radial bearings or single-thrust bearings are used
depending on application requirements.
Bearings are forced lubricated. One of
the bearings is insulated to prevent a
shaft current and to protect the bearing
housings.
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Air/air cooled generator IC616 with PMG.
Cooler The turbogenerators can be delivered
with IC01 cooling systems, which use the
surrounding air from the local environment extended with ducts for remote
cooling air or closed machines equipped
with heat exchangers mounted on top.
In the case of water cooling, the cooling
elements are located on top of the
machine. A redundant cooler element is
optional. The air to air exchanger is also
mounted on the top of the machine. The
cooling air in the outer circuit is blown
into the exchanger by electric fans.
Excitation System The excitation system consists of auxiliary windings or a PMG, automatic voltage regulator (AVR), CTs and VTs for
current and voltage sensing, a built-in
exciter and rotating rectifier. Standard
equipped turbogenerators include digital
AVR, enabling power factor (PF) regulation and a large number of options for
monitoring and protec¬tion (excitation
limiters, overvoltage detection, possibility of redundancy etc.)
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The DC excitation current from the AVR
is amplified by the rotating exciter and
then rectified by the rotating rectifier.
The rotating rectifier consists of diodes
and surge protectors.
Monitoring and Accessories The stator winding is monitored by
temperature detectors embedded in
the winding. Standard equipment for
monitoring of bearings includes double
temperature detectors and oil-flow
meters for sleeve bearings. The air inlet
is also monitored by a double sensor.
The generator is equipped with an anticondensation heater to prevent surface
moisture under certain climatic conditions. The heater is designed to keep the
active elements of the machine warmer
than the ambient temperature. The
generator can optionally be equipped
with CTs for metering or differential protection. Vibration sensors for bearings
and shaft are also available.
The complete
machine is
mechanically
checked
and tuned
if needed.
3D model of the complete rotor.
Engineering & Design The engineering design is available in a
3D environment. The entire product can
be visualized including the accuracy level
and connections between motor parts,
enabling continuous improvement and
optimization. The rotating and static
parts are FE modeled to assure stiffness.
The excitation from surrounding elements is also included in the complete
analysis. Special attention is given to
reduce vibration and noise issues. The
complete design is modular, assuring the
synchronization of the main parts, reducing delivery times and the lead time for
the complete product. Although the main
parts make up the standard design, the
interface connection and ventilation unit
are customizable.
Quality Turbogenerators, like all other products
supplied by Siemens, conform to high
quality standards. In addition to ISO 9001
certification, all materials comply with
general standards (EN, IEC, ISO etc) as
well as with Siemens standards which are
even more stringent in many ways.
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The biggest container ships in the world, 8 APM Maersk L203-210, have one steam turbine driven generator on board
(10.625 MVA, 60 Hz, 1800 rpm, 6.6 kV, ABS classification) as part of the waste heat recover (WHR) system.
Applications Turbogenerators are suitable for use
in turbines with speeds of 1500 or
1800 rpm. The design can be adapted for
steam or gas turbines, for open foundations or container solutions, for land or
classified generators on ships or off-shore
platforms including all relevant aspects
of operation (environmental, declination
for ship or offshore, etc.). The connection
to the turbine, foundation as well as the
cable connection and auxiliaries can be
optimally adapted to match the setup of
the complete system.
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Final assembly of the steam turbine driven generator
15 MVA, 13.2 kV, 1500 rpm for steam turbine in Brazil.
Service The Siemens service network is made up
of an experienced team of professionals
around the world who can provide
customer support in over 100 countries.
Offering an extensive range of services
and support for Siemens customers
throughout the product life cycle, the
service team acts as your partner for the
entire life of the generator.
We offer comprehensive services ranging
from technical support and preparing a
generator design to providing after sales
service and support. Service and maintenance contracts ensure the reliable functionality of your plant. We also offer
spare parts, repairs and troubleshooting.
Furthermore, we can give you the best
technical advice on new projects such as
expansions, retrofitting and general optimization and modernization projects.
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Get more information
www.semd.cz /
Siemens AG
Subject to change without prior notice
Drive Technologies and
DISPO 21503
Industry Sector
Industry Automation
P.O. Box 4848
90327 NUREMBERG
GERMANY
Order No.: E20001-A420-P500-X-7600
GD.LD.XX.LDSO.52.1.02 WS 03112.
Printed in Germany
© Siemens AG 2011
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general descriptions or characteristics of performance which
in case of actual use do not always apply as described or
which may change as a result of further development of the
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