Management and Distribution Strategies for Dynamic Power in a Ship’s Micro-Grid System Based on Photovoltaic Cell, Diesel Generator, and Lithium Battery

Abstract

Combining new energy technology with electric propulsion technology is an effective way to decrease the pollution of water resources caused by cruise ships. This study examines the stable parallel operation of a ship’s micro-grid system through a dynamic power management strategy involving a step change in load. With cruise ships in mind, we construct a micro-grid system consisting of photovoltaics (PV), a diesel generator (DG), and a lithium battery and establish a corresponding simulation model. We then analyze the system’s operating characteristics under different working conditions and present the mechanisms that influence the power quality of the ship’s micro-grid system. Based on an analysis of the power distribution requirements under different working conditions, we design a power allocation strategy for the micro-grid system. We then propose an optimization allocation strategy for dynamic power based on fuzzy control and a load current feed-forward method, and finally, we simulate the whole system. Through this study we prove that the proposed power management strategy not only verifies the feasibility and correctness of the ship’s micro-grid structure and control strategy, but also greatly improves the reliability and stability of the ship’s operation.

Analysis of the Dividend Policy Decision-Making Mechanism of Chinese and Taiwanese Lithium Battery Industries

“…At present, there are many manufacturers that have invested in technologies related to the development of automotive Lithium batteries so that the lithium battery industry can be more perfect [10,11]. Chang's Ascending Enterprise Company, Ltd. (CAEC, Taichung City, Taiwan), the upstream manufacturer of lithium batteries, in which the Formosa Plastics Group has invested, has been in the field of car battery layout for a long time [12]. Many middle-and down-stream manufacturers have also begun to transform, in an effort to not become absent from global supply chains [11][12][13].…”

“…Chang's Ascending Enterprise Company, Ltd. (CAEC, Taichung City, Taiwan), the upstream manufacturer of lithium batteries, in which the Formosa Plastics Group has invested, has been in the field of car battery layout for a long time [12]. Many middle-and down-stream manufacturers have also begun to transform, in an effort to not become absent from global supply chains [11][12][13]. In summary, Chinese manufacturers are expected to focus on the placement strategy of the lithium battery market in the next few years, while Taiwanese manufacturers will mainly focus on a technology-oriented direction [2][3][4][5][6][7][8][9][10][11][12][13].…”

Special Issue on Selected Papers from IEEE ICKII 2019

“…Yu et al, reported "Management and Distribution Strategies for Dynamic Power in a Ship's Micro-Grid System Based on Photovoltaic Cell, Diesel Generator, and Lithium Battery" [6]. This study examines the stable parallel operation of a ship's micro-grid system through a dynamic power management strategy involving a step change in load.…”

Communication and Advanced Metering Issues for the Incorporation of Renewable Energy Resources in Microgrids

“…Microgrids propitiate the integration of DERs, making power systems more efficient and providing a better management of energy resources [8], [9]. As regards its operation mode, a microgrid can operate connected to main grid or in islanded mode.…”