HVDC Transmission for Rural Alaska STAKEHOLDERS ADVISORY GROUP SECOND MEETING January 14, 2010 ANCHORAGE, ALASKA Joel D. Groves, P.E. polarconsult alaska, inc. ENGINEERS - PLANNERS - ENERGY CONSULTANTS 1503 W. 33rd Avenue, Suite 310 Anchorage, Alaska (907) 258-2420 www.polarconsult.net joel@polarconsult.net
MEETING GOALS 1. PROJECT STATUS UPDATE 2. DISCUSS PHASE III GOALS, SITES 3. FORM SAG WORK GROUPS 4. PROJECT Q & A 5. NEXT MEETING Project Status Highlights Manitoba International, LTD under contract as specialist HVDC consultant Operates Nelson River Bipoles, 2 HVDC circuits (3,400 MW) in arctic climate. Operates HVDC Research Centre, Expertise in HVDC operations, hardware, R&D and testing capabilities Tasked with technical review, MTDC network assessment, special hardware, cold climate experience, communications, fault detection, and regulatory assistance.
Project Status Converter 1 MW Enclosure (20 x13 )
Low Voltage Cabinet Weight & Dims: 63 H x 42 D x 74 L 2,300 lbs Emergency Transport: CASA-212-200 Cooling Forced Air High Voltage Assembly Weight & Dims 62 H x 36 D x 127 L 4,900 lbs (wet) 2,100 lbs (dry) Emergency Transport CASA 212-200 Cooling Coolant is Luminol TR/TRi Pour Point -60C Flash Point 170C Natural Oil Convection
Project Status Intertie Control Phase III Demo Controls Phase III demo will be point-to-point HVDC power regulation by DC line voltage Communications desirable for control and fault detection Communications necessary for load shed HVDC Vision for Alaska = MTDC Networks More work is needed to define control schema Manitoba tasked with developing a roadmap Project Status Overhead System Validated conceptual design Foundation design in progress Waiting for pricing and product development options from vendors
Project Status OH Example GVEA Northern Intertie Commissioned 1968 Guyed lattice, 138 kv 1,000 1,200 spans Permafrost soils Some frost jacking issues Project Status Submarine Cable Work Plan Conceptual materials and design of cable done Soliciting budgetary pricing from manufacturers to design and manufacture cable in commercial quantities No testing needed in Phase II
Project Status Buried Cable Work Plan Unarmored submarine cable is suitable Existing 1/0 35kV AC cable is suitable Frost cracking is key issue in arctic soils No proven solution from utility/oil industry experience. GCI doing some interesting work with telecom cables same problem Evaluating test options and developing test plan Project Status Construction and O&M Methods Identified existing rigs/equip that can be adapted to construct overhead system Working on O&M methods
Project Status Economics Collecting cost data Economic analysis will start in Q2 2011 Phase III Demonstration Project - PROJECT OBJECTIVES Prove up HVDC Hardware Prove up innovative technologies Overhead, overland cable, etc. Prove functionality of SWER
Phase III Demonstration Project- PROJECT CRITERIA Transmission only Lengths >10 miles Load < 1 MW Benefit Readiness Constructability Phase III Demonstration Project CANDIDATE PROJECTS
FROM DISTRIBUTING ALASKA S POWER polarconsult alaska, NANA inc. PACIFIC/WH PACIFIC/NANA engineers planners COLT energy consultants DECEMBER 2008
QUESTIONS AND COMMENTS