MARIGOLD the MEUST deep sea network Specificities of the site Architecture concept Marigold Electric power distribution Technological aspects JJD 14/02/2011

MARIGOLD the MEUST deep sea network Specificities of the site : Site location Site evaluation campaign JJD 14/02/2011

MEUST site location P A L JJD 14/02/2011

MEUST site location Strategy : « a priori » choice of two potential areas. POINT P : latitude 42° 50’N distance 16NM POINT L : latitude 42° 50’N distance 26NM Basic criterias : - Three nautic miles diameter horizontal surface - depth ~ 2300-2400m - closer to the shore in front of possible submarine cables landing field Influence of slope Site evaluation campaign JJD 14/02/2011

MEUST site evaluation Synchronous measurements of the physical characteristics (temperature, conductivity, pressure, turbidity) and sea current versus bioluminescence: • For one year at least, •At two locations : La Seyne off distant ~ 15 and 25 nautical miles from the Sablettes 'cable landing zone. •Two identical autonomous lines and simultaneously deployed •Recovered periodically every 2-3 months (80 d) in order to: • Data retrieval and replacement of batteries on board and immediate re-immersion. Data available on website: http://marocean.in2p3.fr/antares/ JJD 14/02/2011

MARIGOLD the MEUST deep sea network Marigold architecture : General provision Network components Deployment scenarios JJD 14/02/2011

MARIGOLD General provision Dimensioned to host up to ~ 1OO DU’s. Deployed offshore of Toulon (30 -50 km from the coast). Designed in a scalable ring topology network architecture. Made of standard components gradually deployed Performed with similar offshore facilities as ANTARES (DPS ship and ROV) Two access options considered : one or two MEOC possible. Fibers and conductor distributed in the two directions of the ring. JJD 14/02/2011

Marigold design with two cables access JJD 14/02/2011

MARIGOLD General provision Electric power transported in AC current. Standard telecommunication cable used as MEOC ( one conductor, ~ min 60 fibers needed, 30 only with two access cables). Sea return current. 6 identical nodes distributed around a ~ 2km diameter area and chained by links of ~3km. 16 DU’s individually connected by ROV to each node to constitute a bunch arranged on seabed as ANTARES. JJD 14/02/2011

MARIGOLD Network components Electro-optical Marigold links : 3 km length Designed to allow dry connections operation to the nodes on board. High voltage specification. Cable Joint Dry connectors Termination JJD 14/02/2011

MARIGOLD Network components Marigold nodes : Sea return electrode Manifold Junction box Pre-chambers Two main components : node = Junction box + manifolds JJD 14/02/2011

MARIGOLD Deployment scenarios The main idea of Marigold is to deploy each node one after another with its link ready to connect to the next node. Li+1 Manifolds Mi Ni Li JJD 21/06/2010 Projet MEUST Infrastructure

Marigold Deployment scenarios Each node could be recovery for replacement or board repair without affecting the position of the others. JJD 21/06/2010 Projet MEUST Infrastructure

MARIGOLD Deployment scenarios General assumptions: Sea facilities capabilities similar to those used byANTARES ( DPS supply ship and ROV) Two ships of laying needed (Best Practice ESONET Recommendations ) Installation and recovery of nodes by winch (remove tails dredging). No handling charges when using the links. JJD 14/02/2011

Marigold deployment scenarios Laying the main cable (One MEOC only and Y termination option) Laying from beach to sea using specialized cable ship. Extra length deployed before final layout. Network links deployed at endings of the cable and provided with plug cap and dredging tail . Y termination Joint terminal Shore Plug Cap L1 L2 JJD 14/02/2011

Marigold deployment scenarios Installing a standard Node: Recovery of the link Li previously deployed with Ni-2 Connexion on board of Li to new node Ni to the next link Li+2. Pose of Ni and next associated link Li+1 as illustrated using two work ships. Ni Li-2 Li Ni-2 Li+2 JJD 14/02/2011

Marigold deployment scenarios Recovering a Node : Request a ROV intervention for disconnecting all the users of the node and hooking the cable winch recovery. Ni Li Li-2 JJD 14/02/2011

MARIGOLD the MEUST deep sea network Electric power distribution : General structure Possible diagram to study Work in progress JJD 14/02/2011

MARIGOLD Electric power distribution General structure : Energy transport is considered in single phase AC current. Voltage is raised to up to 4 or 5000 volts for transport in shore source substation. High specific submarine capacitance compensated to reduce reactive power. Sea return current . Network designed in double supply by looped connection. JJD 14/02/2011

MARIGOLD Electric power distribution Shore source station Backup power generator Supplier EDF 400V 3 ~ Battery Backup power To switch node To next node TI TT 400/5000 V 5000/400 V To manifolds To manifolds UPS Possible single line diagram MEOC Seabed network Internal power system AC/DC converters JJD 14/02/2011

MARIGOLD Electric power distribution Work in progress : The definition of requirements using functional analysis method is done ( report available next week). Diagram studies and simulations started and results foreseen by the end of April.( Need to know DU’s power requirement ) The next step will be to specify the components for integration into the junction box and build a network model for testing , validation and node prototype design specifications. (Job finalized at the end of year). Concerning the MEOC , the supply contract has to be signed by the end of 2011 for a deploy ment completed in 2012 ( Tenders in Fall). Starting inquiries soon. JJD 14/02/2011

MARIGOLD the MEUST deep sea network Technological aspects : Two main challenges : Integrate pressure balance devices in the junction boxes Find a technical and/or economical alternative to the wetmate connectors used by ANTARES. Node conceptual design Wet mateable interconnexions JJD 14/02/2011

MARIGOLD node conceptual design Two main components constitute the node : the junction box and the manifolds. The junction box is designed with two appendices ( prechambers) in order to connect the adjacent network links of the node. Links interfaces are designed to manage dry connections which have to be performed on board of the ship. The junction box could be design in three parts to take care to the integration of the devices. JJD 14/02/2011

MARIGOLD node conceptual design Manifolds interfaces Components and devices integration cylinder Link connections prechambers Closure flange High voltage container The three parts of a junction box

MARIGOLD node conceptual design Junction box integration scenario JJD 14/02/2011

MARIGOLD node conceptual design Junction box integration scenario JJD 14/02/2011

Virtual MARIGOLD node JJD 14/02/2011

Virtual MARIGOLD node JJD 14/02/2011

Link ending example adapted to pressure balance technology JJD 14/02/2011

Technological aspects inquiries Equipressure devices : Inquiries to Pronal and Musthane companies ( elastomeric bags for 25 years timelife). Junction box : Manufacturing of large and thin welded containers in stainless steel or titanium ( 630x1500 mm). JJD 14/02/2011

MARIGOLD the MEUST deep sea network Technological aspects : Two challenges : Node design Wet mateable interconnexions JJD 14/02/2011

Actual interconnexions layout ! ANTARES JJD 14/02/2011

« Wet mateable » connectors Hybrides : monopole ODI Seacon (base « hydralight ») WetMate/CPPM Electrics : Ifremer COS Seacon, Gisma Vectogray, Hydrogroup, Alstom, Digitron Optics : Seacon, Gisma Seacon / Ifremer Elec connector Optic connector JJD 14/02/2011

Hybrids: ODI “rolling seal”: Seacon hydralight cost >25k€

Hybrid: “WetMate” Industrial Project (1MW) with EDF, COMEX and Subseatech (1.8M€) End 2012

Connecteurs « wet mateable » Electriques : Ifremer COS Low cost ??

Connecteurs « wet mateable » Electriques low tension (<500V): Seacon, Gisma Low cost <10k€ 37

Connecteurs « wet mateable » Electriques hight tension: Vectogray, Hydrogroup, Alstom, Digitron, Deutch Cost >20k€ 38

JJD Réunion Infrastructure MEUST 31/01/2011 Optic: GISMA, Seacon Hydralight cost >10k€ JJD Réunion Infrastructure MEUST 31/01/2011 JJD réunion infrastructure MEUST 31/01/2011 39

JJD Réunion Infrastructure MEUST 31/01/2011 Optic: « beam expanded » Seacon-Ifremer Low cost <10k€ JJD Réunion Infrastructure MEUST 31/01/2011 JJD réunion infrastructure MEUST 31/01/2011

JJD 14/02/2011