Air Cooled
Turbogenerators
Air Cooled
Turbogenerators
Air-cooled turbogenerators provide a modern, highly compact solution for:
•base and peak load operation
•daily startup and shutdown
•easy low cost maintenance
A range of models offering high efficiency, excellent quality and optimum reliability are available
to meet turbine requirements. The reduced impact of auxiliary systems simplifies unit management and cuts the cost of spare parts.
Design features and manufacture
Ansaldo Energia air cooled generator technology
is continuously upgraded and enhanced by dedicated R&D work and new design tools, including
finite element 3D analysis of mechanical, electrical and fluid behavior.
Turbogenerators have indirectly cooled stator windings and directly cooled rotor windings and are
self-ventilated in a closed circuit with air to water
coolers.
Special make-up or active-carbon filters can be
provided if needed (e.g. air contamination).
Stator
The stator comprises the two horizontally split frame
sections bolted together, the assembled stator core
and the winding. Splitting the frame into sections
speeds up generator delivery and facilitates stator
erection and maintenance operations.
The core is cooled by air passing through radial
ducts between lamination packets.
The self-supporting stator core is assembled and
welded to the lower part of the housing in such
a way as to permit thermal expansion and core
vibration without transmission to the foundation.
The stator has a two-layer transposed bar winding
insulated with class F mica paper on glass-fibre
tape (resin rich insulation system).
Bars are firmly braced in the slots by means of
epoxy-glass slot wedges and a ripple spring to
prevent loosening after long service.
Rotor
The rotor body is machined from a single alloy
steel forging with excellent magnetic and mechanical properties. Forgings are purchased only
from qualified suppliers and comprehensively inspected by sampling and ultrasonic testing.
The rotor winding consists of hollow rectangular
conductors made of hard-drawn copper alloyed
with silver to increase strength at operating temperature. The rotor winding can expand uniformly
lengthwise to ensure smooth running and minimum sensitivity to rapid load changes. All the in-
sulation materials used in the rotor comply with
class F specifications.
The rotor surface is protected against circulating
currents caused by unbalanced loads through
special high conductivity wedges and short circuit
rings under retaining rings.
The retaining rings hold the rotor end winding in
place.
The rotor is supported by two bearings with white
metal bushes carried in bearing pedestals.
Diagnostics
Ansaldo Energia introduced diagnostics for air
cooled turbogenerators in order to monitor the
unit’s “Life Parameters”.
Ansaldo Energia turbogenerators have a dedicated sensor package complete with various instruments to collect data, depending on customer requirements, e.g. on line, continuous, connected to
distributed control system (DCS), remotable.
Petergraf
05/2012
NETHERLANDS (2)
42 MVA
POLAND (3)
CROATIA (1)
410 MVA
6 MVA
FINLAND (3)
RUSSIA (16)
530 MVA
USA (8)
1,640 MVA
ROMANIA (3)
283 MVA
UK (9)
HUNGARY (2)
1,227 MVA
142 MVA
350 MVA
ALBANIA (1)
SERBIA (1)
126 MVA
40 MVA
PUERTO RICO (2)
PORTUGAL (1)
160 MVA
JAMAICA (1)
41 MVA
MEXICO (1)
GREECE (10)
ITALY (214)
15 MVA
1,351 MVA
20,390 MVA
SPAIN (5)
OTHER
MIDDLE EAST (54)
1.500 MVA
MVA 9,960
MOROCCO (6)
TURKEY (5)
1,187 MVA
254 MVA
18 MVA
SENEGAL (1)
PANAMA (1)
369 MVA
113 MVA
43 MVA
71 MVA
PAKISTAN (6)
MALTA (5)
TAIWAN (3)
BANGLADESH (3)
830 MVA
550 MVA
COTE
D’IVOIRE (2)
PERU (1)
9 MVA
INDONESIA (3)
177 MVA
65 MVA
150 MVA
ARGENTINA (20)
386 MVA
206 MVA
SUDAN (3)
BOLIVIA (2)
CHILE (7)
INDIA (9)
19 MVA
3,031 MVA
18 MVA
146 MVA
ETHIOPIA (2)
ALGERIA (17)
VENEZUELA (2)
CONGO (2)
UAE (19)
400 MVA
1,665 MVA
GHANA (2)
165 MVA
1.813 MVA
EGYPT (5)
MALAYSIA (1)
759 MVA
117 MVA
BAHRAIN (5)
SOUTH AFRICA (1)
174 MVA
65 MVA
LIBYIA (4)
68 MVA
QATAR (4)
YEMEN (9)
406 MVA
SAUDI
ARABIA (10)
JORDAN (2)
120 MVA
262 MVA
316 MVA
OMAN (9)
LEBANON (4)
1,191 MVA
740 MVA
SYRIA (4)
886 MVA
Total number of Air Cooled Turbogenerators (56,000 MVA)
233
References here represented are the ones since 1950. Ansaldo Energia produces air cooled
16152 Genova - Via N. Lorenzi, 8 - Italy
Tel: +39 010 6551 - Fax: +39 010 655 3411
E-mail: ansaldoenergia@aen.ansaldo.it
ansaldoenergia.com
since 1920
Stampa: Microart Recco - Genova
Ansaldo Energia Air Cooled Turbogenerators
References in the World