HTS Cables: Pitfalls and Potential LIPA Cable Project. J. Maguire American Superconductor. DOE Wire Workshop January, 2007 Panama City, FL

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1 HTS Cables: Pitfalls and Potential LIPA Cable Project J. Maguire American Superconductor DOE Wire Workshop January, 2007 Panama City, FL

2 LIPA Project Overview Long Island Power Authority Holbrook Substation Electrical Characteristics - Design Voltage/Current 138kV/2400A ~ 574MVA - Design Fault Current 12 line cycles (200ms) Physical Characteristics - Length ~ 600m (world s longest HTS cable) - HTS Conductor Length ~155km - Cold Dielectric Design Hardware Deliverables - Three ~600 m Long Phase Conductors - Six 138kV Outdoor Terminations - One Refrigeration System + Laboratory Pulse Tube System Installation/Commissioning Mid 2007 World s first installation of a transmission voltage HTS cable

3 Project Status (1) HTS Cable - Qualification Test Complete Voltage Withstand BIL (650kV) Load cycle - Manufacturing 2/3 phases cable core complete, cryostat installation underway 3 rd phase dielectric installation underway

4 Project Status (2) Terminations - Qualification Testing Complete Voltage Withstand BIL (650kV) Load cycle ASME - Manufacturing Bushings to 60 bar Termination Cryostats (~50% complete) Bushings Qualified

5 Project Status (3) Refrigeration System Equipment installed Interconnecting piping and wiring complete Backup system complete Commissioning to start Jan 17, 07 System will operate until cable integration

6 Project Status (4) Site Refrigerator building installed Termination pad complete on refrigerator end Phase and instrumentation conduit installed Center box installed Redundant power feed and ATO installed Steelwork installed

7 Status of HTS Cable The current LIPA project goes a long way towards demonstrating the capabilities of transmission voltage HTS cables - First permanent HTS transmission cable installation in a major utility grid - All R+D issues addressed - Focus now on completion of manufacturing, installation, operation Need for HTS cables continues to grow worldwide in US, upgrading the power grid is a national imperative - Addressing growing power bottlenecks in urban environments - Addressing major grid stability issues and blackouts - Highlighted in Energy Policy Act 2005

8 HTS Cable Technology Gap US/Southwire: 12.5kV 27MVA (30m) DENMARK: 36kV 125MVA (30m) MEXICO: 15kV 47MVA (30m) JAPAN: 66kV 114MVA (30M) KOREA: 22.9kV 60MVA (30m) KOREA: 22.9kV 60MVA (100m) US/EPRI: 115kV 400MVA (50m) CHINA: 35kV 121MVA (30m) JAPAN: 77kV 133MVA (500m) US/DTE: 24kV 100MVA (120m) US/NIMO: 34.5kV 48MVA (400m) US/AEP: 14.5kV 76MVA (200m) US/LIPA: 138kV 600MVA (600m) EUROPE: 10kV 17MVA (30m) Utilities require cables with: High Power Capacity Long Length (4-40km) Intermediate Cooling Elevation Changes Acceptable Economics ($/MVA) Controllability Transmission Voltages (69-161kV) Integrated System Fault LIPA Current HTS Expansion Mitigation Plan Repairability Grid 2030 Milestone: 10 Mile Lengths Key: Distribution Transmission CHINA: 10.5kV 27MVA (75m) Grid 2030 Milestone: Power Hubs Superconductor Cable Technology Achieved or Planned Superconductor Cable Needs Identified A compelling demonstration needed to propel HTS cables to full commercialization

9 Final Step to Full Commercialization Unique opportunity from LIPA s leadership in offering a major substation-to-substation link as a first step to an HTS spine down Long Island AMSC intends to demonstrate all of the remaining attributes under the next SPE program - Same project team - Long length (> 5 km) cable - Multiple road crossings - Integral part of LIPA grid upgrade - All key needed technologies addressed Time to move beyond incremental steps!

10 Conclusions World s first in-grid HTS power transmission cable - High power transmission design - Meeting all real-world requirements Major hurdles overcome in FY06 - Termination design successful for 138 kv operation - Successful demonstration of HTS wire in real-world cabling operation - Successful design strategies developed to deal with key contingencies 51kA faults, through-faults, hydraulic issues - Successful high power pulse tube demonstration All necessary development is completed and demonstrated Fabrication phase is proceeding well Project on track for energization: a successful HTS power transmission cable will be operational in 2007 Major opportunity for the final step to commercialize HTS cable in upcoming SPE

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