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).
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
Stator
bar winding insulated with class F mica paper on glass-fibre
The stator comprises the two horizontally split frame sections tape (resin rich insulation system).
bolted together, the assembled stator core and the winding. Bars are firmly braced in the slots by means of epoxy-glass
Splitting the frame into sections speeds up generator delivery slot wedges and a ripple spring to prevent loosening after
long service.
and facilitates stator erection and maintenance operations.
AIR COOLED TURBOGENERATORS - GENERAL CHARACTERISTICS
Generators have indirect cooled stator windings
and direct cooled rotor windings.
Stator core is direct cooled with air.
Frequency
Hz
- Mounting arrangement:
IM7305, IM7315, IM7316
- Method of cooling:
IC 9 A1 W7 - IC 8 A1 W7
- Protection degree:
IP 54 (IEC 60034-5)
Speed Power Rated Voltage Rated Voltage - Excitation:
static (standard) or brushless as special application
RPM factor
kV
MVA
- Thermal insulation class: F; thermally loaded only to class B
50
3000
0,8
10,5 - 16
20 - 220
50
3000
0,8
15 - 21
220 - 400
60
3600
0,85
13,8 - 18
60
3600
0,85
17 - 21
- Terminal location:
• above 3 + 3
• below, for connection to the bus duct in the
foundation in the lower part of the frame in the foundation
30 - 240
- Coolers arrangement:
• in the lower part of the frame
• in the foundation
240 - 320
- Installation:
with soundproof enclosure for indoor or outdoor application
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 insulation
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.
Diagnostics
The rotor is supported by two bearings with white metal
Ansaldo Energia introduced diagnostics for air cooled turbobushes carried in bearing pedestals.
generators 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.
Ansaldo Energia
Air Cooled
Turbogenerators
Petergraf
Reference
in the World
POLAND (3)
CROATIA (1)
410 MVA
6 MVA
FINLAND (3)
RUSSIA (17)
530 MVA
USA (8)
ROMANIA (3)
283 MVA
UK (9)
HUNGARY (2)
1,227 MVA
350 MVA
ALBANIA (1)
SERBIA (1)
126 MVA
40 MVA
PUERTO RICO (2)
PORTUGAL (1)
160 MVA
JAMAICA (1)
41 MVA
GREECE (10)
ITALY (222)
15 MVA
1,351 MVA
20,934 MVA
OTHER
MIDDLE EAST (54)
SPAIN (5)
1,500 MVA
MEXICO (1)
1,723 MVA
142 MVA
TURKEY (5)
1,187 MVA
MVA 9,960
MOROCCO (6)
254 MVA
18 MVA
146 MVA
INDIA (9)
19 MVA
4,121 MVA
18 MVA
TAIWAN (3)
ETHIOPIA (2)
ALGERIA (21)
VENEZUELA (2)
369 MVA
113 MVA
43 MVA
71 MVA
PAKISTAN (6)
MALTA (5)
SENEGAL (1)
PANAMA (1)
BANGLADESH (3)
830 MVA
550 MVA
COTE
D’IVOIRE (2)
PERU (1)
9 MVA
02/2014
42 MVA
Stampa: Microart Recco - Genova
NETHERLANDS (2)
INDONESIA (3)
177 MVA
206 MVA
SUDAN (3)
BOLIVIA (2)
65 MVA
150 MVA
ARGENTINA (20)
386 MVA
CONGO (2)
UAE (19)
400 MVA
1,665 MVA
GHANA (2)
CHILE (9)
165 MVA
2,473 MVA
EGYPT (21)
MALAYSIA (1)
1,479 MVA
117 MVA
BAHRAIN (5)
SOUTH AFRICA (21)
LIBYIA (4)
174 MVA
1,265 MVA
68 MVA
QATAR (4)
YEMEN (9)
406 MVA
SAUDI
ARABIA (10)
262 MVA
JORDAN (2)
120 MVA
316 MVA
OMAN (9)
LEBANON (4)
1,191 MVA
740 MVA
SYRIA (7)
Total number of Air Cooled Turbogenerators (58,500 MVA)
>280
References here represented are the ones since 1950. Ansaldo Energia produces Turbogenerators since 1920.
16152 Genova - Via N. Lorenzi, 8 - Italy
Tel: +39 010 6551 - Fax: +39 010 655 3411
E-mail: ansaldoenergia@aen.ansaldo.it
ansaldoenergia.com
2014 1Q Summary
1831 MVA