Port of Helsinki Ltd requests a tender for the general planning of the shore-side electricity system and the required electricity network in Hernesaari and West Harbour, including space reservations and a cost estimate. This assignment also covers the planning of the use of a high-voltage connection.

As a result of the general planning of the Port of Helsinki's cruise ship power, there is a clear picture of the technical, commercial, physical and legislative boundary conditions of the system.

Preliminary planning of shore power supply in the quay area is required for technical boundary conditions. We will investigate possible security, operating personnel and space needs. Estimate the electricity consumption as a whole in The West Harbour and Hernesaari and determine the maximum outputs. The Port will commission a separate study on the power needs of cruise ships and the location of shore-side electricity hatches.

The cost estimate of the project is made on the basis of alternative solutions. The planner calculates the annual costs of the system and the need for return, thereby determining the profitability of the investment.

The Port of Helsinki anticipates that future EU legislation will oblige ports to provide shore-side electricity connection. Proposal for a REGULATION OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL on the deployment of alternative fuels infrastructure and repealing Directive 2014/94/EU of the European Parliament and of the Council. The master plan summarises legislation and agreements. The Port of Helsinki is also committed to being carbon neutral from 2030 onwards.

The master plan includes the space needs and placement options of the equipment in Hernesaari and West Harbour. It will be investigated whether Helsingin Energia's underground facilities can be used. Alternatives to cable routes are tentatively planned.

- Strengthening the port's electricity connection (estimated power requirement 40MW)

o Ensuring the capacity of Helsinki's electricity network in cooperation with HSV.

o 110 kV substation. (Estimated size about 800m2). So far, no space has been reserved for this in the quay areas, nor in the unconfirmed hernesaari master plan. (ANNEX 1)

o It will be investigated whether a connection can be made between The West Harbour and Hernesaari by submarine cable.

o Using the electricity connection also for the needs of shore-side electricity in the West Harbour. Current shore power systems with LJ7 and LJ8 (4MW) and come with LJ6, LJ5 and LJ4. The current need for electricity use is estimated to be mainly night-time.

o In this master plan, a duplicated medium-voltage network of the ports to Hernesaari and West Harbour is planned.

o Possible other port needs, eg. charging infrastructure for electric cars or trucks

o Is it possible to place the substation in existing rock facilities (Helsingin Energia/ -Sähköverkko)

o Is it possible to use rock facilities or a port tunnel to bring cables for a 110kV connection.

- Hernesaaren maasähköjärjestelmän yleissuunnittelu (16MW)

o A shore-side electricity connection with a capacity of 16MW is planned for the hernesaari quays. The cable is brought to the ship using a mobile crane. It remains to be planned whether all berths will be offered 16MW, or lower power. There are three piers: LHB, LHC and LHD.

o With the EU-supported Baltic Cruise project, Stockholm, Copenhagen and Aarhus are investing in offshore electricity for cruise ships and have commissioned studies on the power needs of cruise ships and the locations of shore-side electricity hatches. Cruise ships are committed to the IEC/IEEE 80005 standard, according to which the interface is designed. The power outputs of shore-side electricity systems in Sweden and Denmark are 16MW and 8MW.

o The space requirement of the shore power system is estimated to be approximately 1000m2. Different quays need their own transformer substations. It is necessary to plan where the equipment will be located. In addition, the technical facilities or its connection require a winter storage space for the mobile crane, as well as possibly a driver's social space.