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The control of pollutant emissions has become more and more important by the development of new gas turbines. The use of hydrogen produced by renewable energy sources could be an alternative. Besides the reduction of NOx emissions emerged during the combustion process, another major question is how a hydrogen fuelled gas turbine including the metering unit can be controlled and operated. This paper presents a ¦rst insight in modi¦cations on an Auxiliary Power Unit (APU) GTCP 36300 for using gaseous hydrogen as a gas turbine fuel. For safe operation with hydrogen, the metering of hydrogen has to be fast, precise, and secure. So, the quality of the metering unit£s control loop has an important in§uence on this topic. The paper documents the empiric determination of the proportional integral derivative (PID) control parameters for the metering unit.

Modification and testing of an engine and fuel control system for a hydrogen fuelled gas turbine