Dynamic effects of turbocharging on adaptive speed control of diesel driven power-plants

The adaptive control scheme introduced by S. Roy et al. (1991) for naturally aspirated diesel prime-movers has been applied to turbocharged generation plants. The performance has been studied in comparison to that of a fixed PI (proportional plus integral) controller. It is seen that since the nonlinear effect of air dynamics now affects the dynamic fuel consumption, the turbocharger is a major determinant of the adaptive controller performance. Furthermore, the performance is found to have a very significant effect due to the droop. It can in general be concluded that the turbocharger inertia should be low for high-droop operations. However, despite this predominant factor, the adaptive scheme can achieve good improvement over the conventional controller.>