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Deep Green Island Mode 2

Periodic Reporting for period 3 - DGIM2 (Deep Green Island Mode 2)

Reporting period: 2020-08-01 to 2021-01-31

Island living may call to mind a tranquil, natural and eco-friendly way of life but life on an island comes at a very high price. Island energy is expensive, polluting, inefficient and dependent on external supplies with significant negative impacts on emissions and the economy . Such is the case with Europe’s 2 400 islands – home to some 15 million Europeans.
We estimate that European islands produce 17.5 million tonnes of CO2 every year. These microsystems are almost entirely reliant on diesel.
Existing renewable alternatives, such as wind and solar power, are not always suitable options for these communities as the energy they generate is unpredictable and intermittent, making it difficult to rely on. Tidal energy is also often unsuitable, as it requires fast tidal flows (over 2.5m/s) which only occur in a few specific hot spots around the World.
Minesto has developed an underwater kite technology, called Deep Green (DG), to convert energy from low speed currents and tides. The Deep Green Island Mode (DG Island Mode) is a stand-alone tidal and ocean current energy converter for off-grid applications. The DG Island Mode is an underwater kite, that when steered in an 8-shaped trajectory, obtains a speed of 8-10 times the speed of the actual current. This generates the following unique performance characteristics:
- Generates cost effective electricity in tidal flows as low as 1.3 m/s
- Generates up to 100kW, producing an estimated 0.35 GWh/year, enough to power 100 homes
- Can be located close to the shore
- Up to 15 times lighter per kW compared to other tidal energy solutions
- Easy, low cost installation and maintenance (low CAPEX and OPEX costs)
- Cost of energy 50% lower than diesel generators
DG Island Mode offers cheap, clean, reliable electricity generation to island communities.

The aim of the DGIM2 project is to install the first commercially viable Deep Green Island Mode (DGIM) tidal powerplants in a production and customer environment on the Faroe Islands. The purpose will be to demonstrate the capabilities of DGIM to replace diesel generators in microgrids. Successful demonstration of DGIM will act as a first step to developing commercial ties with utilities across Europe, both for DGIM and as a catalyst for the market uptake of the “utility scale” Deep Green.
"By the end of the third reporting period - on the 31st of January 2021 - the Alpha powerplant had generated its first electricity to the Faroese grid. The Beta power plant was being assembled and subjected to final testing. The main thrust of the work performed during the third reporting period was in work packages 5 and 6.
Here are described the work performed until the end of the third reporting period, per work package.

WP1 Project Management
The project managers continually handled technical and economic risks, time plans, deliverables; and communicated with funding agencies and other stakeholders.

WP2 Demonstrator Site Creation and Preparation
All WP2 objectives were achieved by the end of the second reporting period.

WP3 Powerplant Design, Procurement, and Manufacturing
For the Alpha power plant, the design, procurement, manufacturing, testing, and assembly were all completed during the second reporting period.
For the Beta powerplant, the design, procurement, manufacturing were all completed during the second reporting period while testing and assembly were ongoing during the third reporting period.

WP4 Balance of plant (""BoP"") Design, Procurement and Manufacturing
The Alpha foundation, export cable and Onshore Control station (OCS) were installed in Vestmannasund during the second reporting period.
Beta powerplant: jointly with the client, SEV, we evaluated the options that would present the best value for money from a technical and customer perspective in the DGIM2 project. The conclusion of our evaluation was that deployment of the Beta kite on the Alpha microgrid connection would allow us to compare performance data more efficiently and would enhance the potential for a further elimination of diesel for electricity generation. We therefore amended the project description in March 2021 as follows: the building of the Beta foundation and the installation of the Beta export cable were moved outside the scope of the DGIM2 project. The Beta Onshore Control Station has achieved its project purpose in testing the Beta powerplant. Minesto plans to develop the Beta balance of plant outside the DGIM2 project.

WP5 Off- and Onshore Operations
The Alpha powerplant was deployed and recovered in July 2020. The commissioning activities continued during autumn 2020. The procedures for offshore operations developed during the second reporting period have been used and modified also during the third reporting period. The modifications resulted largely from post-processing of data from the first part of the commissioning campaign and included some altered set points and response characteristics.
After the end of the third reporting period, the Beta powerplant was deployed in March 2021.

WP6 Commissioning and Assessment
The commissioning activities that started in summer 2020 continued during the third reporting period. By November 30th, the project reached the milestone of delivering electricity to the Faroese grid. Commissioning is planned to continue during spring 2021.
All offshore testing activities in the third reporting period have used the lower-down bottom joint system, which became available in Q3 2020. While this required replacing certain subsea components that were used in the October campaign, all operations were successful. This system has its own set of commissioning and testing requirements which were followed. This lower-down bottom joint proved to work very well.

WP7 Demonstration, Dissemination and Communication
Minesto presented at two conferences during the reporting period. Press releases, news, presentations and media were continuously published at The project has surpassed its targets for publicity in news media outlets and in terms of presentations at conferences and events.

WP8 Preparation for Commercial Rollout
Preparations had begun for this work package."
DGIM is a customisable product which offers to go beyond the state-of-the-art by offering sustainable, low cost, energy generation from low tidal flows and ocean currents. It offers significant environmental benefits in comparison to diesel.
Furthermore, DGIM will act as a catalyst to market take-up of the larger DG array technology, in two ways. Firstly, DGIM will offer potential clients the ability to see the technology functioning at a fraction of the cost of installing the DG utility mode. This will allow utilities to test the technology at a marginal cost, and see the potential for Deep Green technology as a solution to their energy needs. Secondly, DGIM will act as a commercialised development platform, allowing us to quickly develop and test new solutions on a small scale before scaling it up to the larger, more complex and more costly array scale which will follow.

The main expected result of the project is Deep Green Island Mode technology that is near market readiness.
ROV image of bottom joint connecting to foundation
The Deep Green technology
Tidal energy by Minesto in the Faroe Islands
Export cable installed
The Vestmannasund project setup
Foundation loaded in Orkney
Kite installed
Faroese installation locations