Author : Naser Mohammed Bayoumy AbdelRahim
CoAuthors : M. S. S. Taha, O. A. Mahgoub
Source : Ain Shams Journal of Electric Engineering (ASJEE)
Date of Publication : 12/2009
Abstract :
Fuel cells have become one of the most promising sources of
electrical energy because of their high efficiency, low
environmental impact, and modularity. However, there are some
difficulties in their operation such as the inability to accept
current in the reverse direction, having low output voltage that
varies with age and current drawn from it, responding sluggishly
to step changes in load, and limitations in overload capabilities.
For these reasons, boost types DC-DC converters are often
necessary to boost and regulate their voltage to provide an
applicable DC power source. Although sliding mode controllers
are used for these types of converters because of their robustness
and stability, yet such controllers operate at very large and
variable switching frequency. This introduces excessive switching
losses, filter design complication, and electromagnetic
interference noise. The proposed controller is a classical PI
controller cascaded with phase-lead compensator. The system is
analyzed and the proposed controller is designed. An experimental setup is constructed in the laboratory to verify the performance of the proposed controller. It is shown that the proposed controller is simple to implement, has good performance measures such as small settling time, slight overshoot, and very low steady-state error.
Download PDF