Mastering Dangerous Vibrations
AIC: Active damping of combustion oscillations
If the sharp curve cannot be avoided, then please use traction control! The same applies to the AIC (ACTIVE INSTABILITY CONTROL) - still a technically unique solution for the active regulation of combustion oscillations and compressor instabilities with active damping. This sophisticated protection concept is used especially in areas where conventional methods fail, i.e. where the "bending road" cannot be seen in time. AIC contains the components for signal measurement + storage + active protection using special high-performance valves and linear motors in real-time. This allows to stabilize a flame or to blow away a stall cell.
Active damping with AIC has no alternative, especially in situations where it is not possible to avoid combustion oscillations, e.g. due to a change in combustion control.
- Active damping of self-excited combustion oscillations, also known as thermoacoustic oscillations, pulsations or humming
- Use in turbines: from single burner to multiple burner plants to large stationary gas turbines
- Well-proven system for worldwide use in large stationary gas turbines of modern combined cycle power plants
Advantages of the AIC
Compared to the IfTA ArgusOMDS system, the IfTA AIC system differs primarily by the DSP firmware. In the industry, the reaction speed is regarded as outstanding - sample by sample is processed and controlled in real-time.
- Acquisition of up to 16 sensor signals and control of up to 32 actuators
- Automatic setting of the control parameters
- Modular design
- Complete integration into the control system via digital, analog or field-bus interfaces such as Profibus, Modbus, Can-Bus
Fields of application:
- Industrial or stationary gas turbines
- Large industrial combustion systems such as process gas heaters
Active vs. passive protection
Compared to passive protective measures, AIC offers the following advantages:
- Easy upgrade for existing applications
- No cost and time intensive retrofitting of the combustion system necessary
- Efficiency, stability and construction of the combustion system are not negatively affected - no additional losses occur due to the Argus AIC system
- Pollutant emissions are even partially reduced, e.g. NOx and unburned fuel/gas
- The control is able to adapt to the actual system behavior and its changes
Siemens Relies on Proven IfTA Technology
As a result of many years of university research work by Dr.-Ing. Jakob Hermann (general manager IfTA GmbH) in this field, IfTA GmbH succeeded for the first time in 1997 in successfully applying this technology to large stationary gas turbines with an output of over 240 MW from Siemens AG to establish it as an industry standard.
Systems in widespread use
Since 1997, approximately 50 of these systems have been successfully implemented in stationary gas turbines worldwide. In addition to their high efficiency in the damping of combustion oscillations, their outstanding features include high system availability and reliability, which led to unrestricted customer acceptance and high satisfaction.