DIASYS netmation

A-CPFM/CPFM

Overview

A gas turbine burns fuel to rotate the turbine.
Excessive fluctuation of pressure (combustion vibration) inside a combustion chamber during combustion can damage the combustion chamber and turbine parts. This is why it is so important to suppress combustion vibration.

MHPS offers A-CPFM and CPFM systems to suppress combustion vibration and contribute to increasing reliability and availability of gas turbines.
Recently, the performance of gas turbines has been improved due to increasing operating temperature. However, there are an increasing number of factors contributing to composition changes of liquefied natural gas (LNG) that increase combustion vibration. Expectations for A-CPFM and CPFM have become higher than ever.

 

Examples of functions

Advanced Combustion Pressure Fluctuation Monitoring System (A-CPFM)

An advanced combustion pressure fluctuation monitoring system (A-CPFM) automatically suppresses combustion vibration during combustion.
The relationship between combustion vibration and the operation parameters that can affect combustion vibration are modeled by this system. When combustion vibration occurs, it is suppressed by adjusting those operation parameters automatically using this model.

A-CPFM
A-CPFM

Combustion Pressure Fluctuation Monitoring System (CPFM)

A combustion pressure fluctuation monitoring system (CPFM) is a protection device for a gas turbine.
If severe combustion vibration that even an A-CPFM cannot suppress occurs, a CPFM automatically reduces power generation of the gas turbine or stops the gas turbine completely to avoid damage to the gas turbine.

Simulator function

 Perating sequence of CPFM/A-CPFM

Perating sequence of CPFM/A-CPFM

  1. Combustion vibration is processed by a dedicated input device, and then sent to the monitoring processes of the CPFM and the automatic adjustment processes of the A-CPFM.
  2. Based on the combustion vibration strength sent from the input devices, the monitoring process of the CPFM generates a monitoring result (No problem, Reduce power generation, or Stop the gas turbine) which is sent to the gas turbine control process.
  3. In the automatic adjustment process of the A-CPFM, based on the combustion vibration strength sent from the input device and the status of the gas turbine sent from the gas turbine control process, an adjustment result is determined and sent to the gas turbine processing unit.
  4. The gas turbine control process controls the gas turbine based on the monitoring result sent from the monitoring processes of the CPFM and the adjustment result sent from the automatic adjustment processes of the A-CPFM.

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Quality assurance

 

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