Fuzzy based Hybrid SMES/Battery system for Stability Improvement of DC Power Systems in an All-Electric Ship
Keywords:
pulse load. Hybrid Energy Storage System (HESS), All Electric Ship (AES), Energy Storage System (ESS)Abstract
As the capacity of all-electric ships (AES) increases dramatically, the sudden changes in the
system load may lead to serious problems, such as voltage fluctuations of the ship power grid, increased fuel
consumption and environmental emissions. This paper proposes Fuzzy based Hybrid Energy storage system for
improving the stability of AES. In this method the Fuzzy controller is used to control the battery DC/DC
controller output. The proposed method is tested on standard test system and results compared with three
control strategies (without ESS, with ESS, with HESS). Results demonstrated that the proposed controller
showing good performance during the pulse load periods. By supplying the pulse loads from the fuzzy based
HESS, the system maintained the voltage at the targeted level, keeping the motor at the required speed and
maintaining constant generation output power both with and without pulse loads.
