Modeling and Controls of Flywheel Energy Storage Systems for Energy Harvesting from Harbor Electrical Cranes

Seaport is the suitable place for trade particularly in terms of imports and exports, and usually it involves goods in containers. Transport is key to the transfer container cranes which it uses diesel as the primary source for the motor movement. This will cause problems to the environment and local residents. Therefore, the measures taken to solve this problem is to replace the use of diesel fuel to electricity for transportation is the most important ports such as cranes. Although it is known crane electricity already exists, but there are still problems in terms of efficiency and power consumption of the network. Typically, in harbor electrical cranes, when the container is lowered, the hoist motor into electrical form converts the container's potential energy, but the conventional drive system has no means to store this regenerated energy. Consequently, this energy is typically dissipated as heat in resistor banks. This study discusses the modeling of flywheel energy storage systems for energy harvesting from harbor electrical cranes. Besides that, this study discusses control methods of the system among the grid, crane and the flywheel as energy storage to avoid the energy waste during the crane down the container. A harbor electrical crane system is selected for computer simulation to demonstrate the effectiveness of the proposed methodology.