Crane swing energy storage device

Can energy storage systems be installed in RTG cranes?

The last 20 years researchers proposed the installation of different energy storage systems, such as BESS, SCESs and combinations of BESSs with SCESs, FESS, in RTG cranes. In this work an evaluation in energy efficiency and purchase cost for these systems is performed and analyzed.

Why do RTG cranes use a deg?

RTG cranes commonly use a DEG to supply with electrical power the electric motors of the crane. The DEG allows an RTG crane to move freely within the port. Electric motors used in the crane draw energy from the generator during lifting or moving, but in case of breaking these motors may also regenerate energy.

How does a RTG crane work?

During the lifting of a container by a conventional RTG crane, the DΕG provides power and energy required by the hoist motors. During the lowering of a container, the hoist motor acts as a generator by creating regenerative braking energy. This energy is dissipated as heat to braking resistors reducing the efficiency of the RTG crane.

What is the optimal energy strategy for RTG cranes?

An adequate stochastic optimal energy strategy for a network of electrified RTG cranes system equipped with an ESS located on the side of the substation to feed more than a single crane is of great interest worldwide due to the potential of increasing energy cost saving and peak demand reduction in ports substations.

How energy storage technology can be used in power system networks?

There are a wide range of energy storage technologies that can be used in power system networks in order to increase energy cost saving and reduce peak demand. The batteries’ energy storage such as lithium-ion or NiCd batteries have been used widely mainly in ports and low voltage applications in power system networks , , .

What is a Bess-SCES system for RTG cranes?

A BESS-SCES system for RTG cranes is proposed in , where a 20 kW DEG is coupled with an AFE with a 73.9kWh/150 kW lithium battery working together with a 1.10kWh/255 kW SCES to provide the peak power for the demand during elevation and receives the regenerated energy at its peak during the lowering phase.