Abstract
More electric technologies (METs) play an important role in meeting ever-growing demands for energy efficiency and emission reduction in the maritime transportation sector. As a result, ships with electrical power transmission are becoming popular compared to traditional mechanical power transmission based ships. Hybrid electric propulsion is an intermediate step in this trend where both mechanical and electrical propulsion technologies are combined to get the benefits of both technologies. In this arrangement, not only the propulsion loads but also non-propulsion loads are connected to a common electrical power bus that could lead to serious power quality issues due to disturbances such as large load changes. This paper presents a comprehensive review on energy storage-based solutions that have been proposed to reduce their effects. The important aspects of existing as well as emerging energy storage control techniques and challenges in reducing transient effects in hybrid shipboard power systems with the use of energy storage are discussed in the paper.
Highlights
Technology advancements have affected many sectors in today’s world and the shipping sector is no exception
Knowledge of loading conditions is essential for any investigation on shipboard operation as it can determine the particular mode of operation that is optimal in terms of cost and efficiency
This paper introduces the shipboard power system with hybrid propulsion and the challenges it faces due to load changes arising from harsh environmental conditions at sea so as to maintain key electrical parameters within acceptable limits
Summary
Technology advancements have affected many sectors in today’s world and the shipping sector is no exception. This issue of voltage and frequency transients onboard mechanically driven or electric ships due to these load changes have been widely discussed in the literature [2,3,4,5] This effect has not been sufficiently studied in hybrid propulsion-based shipboard power systems. This paper reviews the possible energy storage control systems that can be adopted onto ships to reduce the transient conditions in the shipboard power system due to load changes. This is applicable to hybrid propulsion electric ships as their electrical system behavior has not been documented widely in the literature.
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