HVSC: We connect the ships to shore connections!
High Voltage Shore Connection, HVSC also called Shore connection or Cold Ironing, means that both ships and harbours are adjusted in order for ships to be able to connect to the regular power supply system through an electrical cable. If all ships by berth shut down their auxiliary engines and connect to shore electricity instead, the impact on the environment would be reduced significally worldwide. By using shore electricity the auxiliary engine can be shut off and both noise and emission of carbon dioxide, sulfur oxide SOx and nitrogen oxide NOx are thereby reduced.
60 Hertz no problem
A previous difficulty has been that many ships require 60Hz system. In the EU the net frequence is normally 50 Hz. A ship with a 60 Hz system could use electricity with a frequence of 50 Hz for certain equipment, such as regular lamps and heating system, but not for motor-driven equipment such as pumps, winsches and cranes. For ships with 60 Hz system the electricity therefore has to be transformed to 60 Hz.
Today, with modern technology high voltage can be transferred to ships, which reduces the necessary amperage considerably and thereby also the number of cables for connection. The system is based on that a building on the berth containing switchgears, frequency converters and transformers through a davit and and stands supply the ships with shore electricity. The ship then converts the high voltage through transformers to its own operating voltage. More and more harbours are now offering the possitbility to connect to onshore electricity.
We supply the buildings, switchgears, frequency converters and transformers. Also included in our commitment is design and commissioning of the plant.
Our experience on these plants is extensive.
Seven harbours in Sweden and one i Norway
Processkontroll Elektriska has during 2010 built several shore connection plants for the Gothenburg harbour and for Stena Lines ferry service in Gothenburg. On Januari 26th 2011 the so far largest plant for shore connection for 2,5 MVA, 11 kV and 60 Hz was inaugurated in the Gothenburg harbour. Processkontroll Elektriska has designed and with equipment from for instance ABB and Cavotec built and commissioned the plant. Two wind turbines are also connected to the plant in order to make the electricity even greener.
in the Majnabb harbour, Gothenburg, a 10 kV, 50Hz plant was built, which was completed in June the same year.
It was the fifth turnkey HVSC plant in Sweden for us and it makes us proud and experienced suppliers of this type of constructions. In 2010 we designed, built and commissioned three shore connections for Stena Lines’ terminal for the Denmark ferries and we also supplied shore connections for Stena Line in Verkö harbour as well as in Karlskrona and for Scandline in Trelleborg harbour during 2011.
Our latest contribution is a shore connection for a oil rig in Kristiansand in Norge (read more about that further down the page).
See the film how the shore connection works on Stena’s ferries in Göteborg!