According to the fast response and real-time simulation requirements of mutational load

a split shaft gas turbine power generation model was built using volumetric method to better accommodate rapid load changes. The control rules of step changes in load to be adopted and the cascade proportion integration differentiation (PID) control policy were presented. The key influential factors to dynamic performance of step changes in load were discussed. Simulation results show different limitations of parameters bring different effects on the gas turbine dynamic performance. Selecting limitations of parameters reasonably can optimize gas turbine dynamic performance. Results of model were presented and compared with the test date

indicating the model and engine agreed well for each other. The results show the model has good real time

convergent and dynamic response property. Theoretical analysis and test result demonstrate the fuel limitation curve should be operated in 1s after rapid load changes to achieve better dynamic performance. The minimum fuel limitation is necessary for load rejection

and reasonable selection of the limit value is the key to ensure stable combustion and control speed overshoot.