Driven by the “carbon peaking and carbon neutrality” goal

hydrogen blending and pure hydrogen combustion technology of gas turbines have received widespread attention. Producing “green hydrogen” from renewable energy and applying it for power generation is the development direction of the energy field in the future.However

the fluctuation of hydrogen source will inevitably cause the change of hydrogen blending ratio of hydrogen blended gas turbine fuel. Therefore

the dynamic response characteristics of the gas turbine are studied when the hydrogen blending ratio fluctuates. Taking an F-class heavy-duty gas turbine as the research object

a dynamic model is built by using the modular modeling method to analyze the response characteristics of key parameters of the unit and the safe operation of components when the hydrogen blending ratio fluctuates under different loads. The results show that when the hydrogen blending ratio fluctuates

the turbine inlet temperature(T3)will fluctuate violently

and T3 overtemperature will occur in the high load region

which will lead to the deterioration of the blade working environment and affect the safe operation of the unit. The larger the fluctuation of hydrogen blending ratio and the higher the power output

the more obvious T3 overtemperature phenomenon. However

the fluctuation of hydrogen blending ratio has a relatively small impact on the compressor

and the compressor can still maintain a reasonable surge margin.