Air-cooled generators for industrial & power applications

Siemens Energy’s air-cooled generator series delivers a competitive edge, offering power ratings up to 370 MVA with technology proven in real-world operations. With ongoing improvements focused on increasing reliability, serviceability, efficiency, and seamless plant integration, these generators are designed using over 150 years of engineering expertise—dating back to Werner von Siemens’ invention of the electrical generator in 1866.

Remote Diagnostic Service

Remote Diagnostic Service (RDS) enhances asset production by transforming data into actionable insights. Employing a proactive methodology, RDS monitors the entire spectrum of oil, gas, and industrial rotating equipment across more than 80 countries to detect potential issues before they affect operations. Siemens Energy is committed to maximizing the availability and reliability of its customers' installed assets.

Technology overview

The generators are designed using our building-block system, which optimizes the diameter and length to ensure perfect alignment with the plant and grid requirements. Grid studies can be performed. There are many more options available, including variants of the cooling system and generator lead positioning. All parts and connections are easily accessible, and the enclosure can be quickly removed for installation or maintenance.

Air-cooled generators fit to most steam and gas turbines on the market

Flexible gas and steam power plants will remain a key component of a demand-driven power supply. They form the solid foundation of a diverse and clean energy mix – indispensable for meeting the world's current and future challenges. The air-cooled generators complement the turbine packages of any manufacturer and meet grid and environmental requirements as well as specific customer needs.

Replacement of older, high-maintenance generators

Siemens Energy offers the Footprint™ generator concept as a solution for replacing older, high-maintenance water-, hydrogen- or air-cooled generators with state-of-the-art SGen-100A-2P generators. Thanks to their modular design, our generators can be adapted to match existing foundations and plant interfaces, minimising reconstruction costs and installation time. This is a more time- and cost-effective alternative to repairing an existing generator.

Technical benefits

Available for various types of power plants, our generators can be efficiently adapted to local site conditions.
In addition, they can increase the rated power and efficiency of a power plant.
By replacing the older equipment, you also reduce the risk of finding unexpected signs of aging or damage in the existing generator.
For the replacement of non-OEM equipment, 3D measurement is available to adapt existing foundations.

Transmission grid stabilization

Rotating synchronous condensers are a proven, reliable solution for ancillary grid services guaranteeing frequency and voltage stability, plus the ability to ride through grid disturbances. Today’s emerging power systems are dominated by converter connected renewable power producers which are susceptible to decreased short circuit power and system inertia, making them more sensitive to electrical faults and sudden load imbalances. Rotating synchronous condensers are significantly less sensitive to these issues.

Grid benefits

Synchronous condensers have the unique ability to respond inherently without any time delay to fault or load imbalance events. They increase the short circuit power by their overload capability and improve the rate of change of frequency (RoCoF) by the physical inertia contribution. Furthermore synchronous condensers provide dynamic voltage control by supplying and absorbing reactive power to and from the grid.

Synchronous condensers

A synchronous condenser solution comprises a generator connected to the high voltage network through a transformer. It is started by either an electric motor or a static frequency converter. Once synchronized with the network, the generator behaves like a synchronous motor without load, compensating reactive power and stabilizing the system, in case of a fault or imbalance events.

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	SGen5-100A	SGen6-100A
Frequency	50 Hz	60 Hz
Apparent power	25–370 MVA	25–370 MVA
Efficiency	up to 98.9%	up to 98.9%
Designed for power factor	0.80	0.85
Terminal voltage	6.3–15.75 kV	6.3–15.75 kV

	SGen5-1000A	SGen6-1000A
Frequency	50 Hz	60 Hz
Apparent power	180–370 MVA	180–370 MVA
Efficiency	up to 98.9%	up to 98.9%
Designed for power factor	0.80	0.85
Terminal voltage	10.5–20 kV	10.5–20 kV

Air-cooled generators for industrial and large power applications

SGen-100A

SGen-1000A

Highlights of the SGen-1000A series generator

Robust design

MICALASTIC® insulation technology

Innovative manufacturing technology

Flexibility and customization

Brushless or static excitation for your individual application

Adaptable coupling design

Service and maintenance

Short construction and commissioning times

Flexible maintenance and service – where and when you need it

Remote Diagnostic Service

The benefits of Remote Diagnostic Service

Continuous and secure data exchange

Highlights of SGen-100A-2P

Technology overview

Air-cooled generators fit to most steam and gas turbines on the market

Generators for steam power plants

Generators for gas-fired power plants

Operational safety and special explosion protection solutions

Generators for onshore use

Generators for offshore use

Replacement of older, high-maintenance generators

Technical benefits

Reduced cost

Transmission grid stabilization

Grid benefits

Synchronous condensers

Technical data

Proven in commercial operation: Generator reference highlights

Nevinnomisskaya DSPS, Russia (2009)

FPCC Mai-Liao, Taiwan (2013/2015)

BASF Schwarzheide, Germany (2022)

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