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Siemens introduces port power system

  • Friday, 20 July 2007 | News

Siemens Power Transmission and Distribution (PTD) has developed a new ships' power system called 'Siharbor', based on its DC transmission system Siplink, which enables ships berthed in port to be connected to the medium voltage network of the local power supply company and supplied with electricity.

Removing the need to keep diesel generators running, Siemens estimates that use of the system can result in a saving of between 25 and 30 per cent in electricity costs.

Siharbor is designed to be used with any type of vessel and allows any combination of 50-Hz and 60-Hz power supply systems and all voltage levels to be supplied.

The system uses two converters that are connected together by a DC intermediate circuit and connected to a power supply network, so that it can not only feed a separate network from a distribution network but can match power supply systems with different parameters and interconnect them.

In order to use Siharbor both the harbour and the ship must be equipped for the shoreside power supply with a plug-in connection system. After connecting the plug-in connector on the ship, the automation system installed on shore initiates the system start-up procedure. The user dialogue is conducted from the ship, and the ship's power supply is not interrupted.

Siplink is self-synchronising and takes over the power supply within a few minutes. Afterwards, the diesel generators for the on-board supply network can be shut down and the complete on-board network can be supplied from the shore-based power supply system.

An archiving system records all data about the power transmission that is relevant to the ship. Ship-to-shore communication is via a fibre-optic cable, and the Siplink system continuously checks the parameters of the connection.

A software module is also available that not only records and archives power consumption while the ship is berthed in port, but also forwards the total power consumption of the ship to the shipping company immediately for payment of the electricity costs.

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