The document discusses Hawaii's efforts to transform its electricity grid to integrate more renewable energy sources like wind and solar in order to meet renewable portfolio standards and reduce greenhouse gas emissions. Planning studies are being conducted to understand the impacts and feasibility of integrating high levels of variable renewable resources. New tools, programs, and processes are being developed and applied to help facilitate this transformation, including the Hawaii Utility Integration Initiative, battery energy storage demonstrations, and studies of inter-island wind transmission via undersea cables. The goal is to achieve a reliable, sustainable and cost-effective renewable energy future for Hawaii.

1. Transforming Hawaii’s Grid: Integration Planning University of Hawaii, Seminar November 12, 2009

5. What are our Options? Approach Results Status Quo Will not meet 2015 and beyond RPS targets DSM/Energy Efficiency Positive progress but not alone sufficient to meet 2015 and beyond RPS targets Maximize Renewables on-island Positive progress but unlikely to meet 2015 and beyond RPS targets Inter-island cable integrating multi-island resources & load Transformational progress toward achieving 2015 and future targets

6. Kauai Oahu Molokai Lanai Maui Hawaii Recognizing Hawaii’s Wealth of Renewable Potential Solar Wind Geothermal Pumped Storage MSW Biomass/Biofuel OTEC/Wave DSM/Energy Efficiency

28. Investigating Routing Options USDOE/DBEDT/Univ of Hawaii – SOEST

29. OWITS – Oahu Wind Integration & Transmission Studies TCRPS – Transmission/ Cable Routing & Permitting Studies Stage 1A: Oahu System Studies to Understand Impacts & Determine Feasibility

30. Phase I – System Model Development Flowchart Source: GE Phase I GE Phase I Model

31. Accounting for Output Profiles for Different Generators Typical Output Profile for Different Generators Peaker Base Generation Intermittent (Wind)

32. New Intra-hour Modeling Tools for System Planning Led to new Intra-hour modeling tools created to bridge traditional Production Simulation and Dynamic Simulation to account for impact of Variable Wind and Solar resources

34. Consideration of Mitigation Options

35. OWITS – Oahu Wind Integration & Transmission Studies TCRPS – Transmission/ Cable Routing & Permitting Studies Stage 1A: System Studies to Understand Impacts & Determine Feasibility

36. Ages of Generating Units Average age of HECO Base Load Steam Units 39.3 Years Average age of HECO Cycling Steam Units 54.3 Years Unit Capability Type Operating Mode Service Date Age Honolulu 8 56 Steam, Non-Reheat Cycling 1954 55 Honolulu 9 57 Steam, Non-Reheat Cycling 1957 52 Waiau 3 49 Steam, Non-Reheat Cycling 1947 62 Waiau 4 49 Steam, Non-Reheat Cycling 1950 59 Waiau 5 57 Steam, Non-Reheat Cycling 1959 50 Waiau 6 56 Steam, Non-Reheat Cycling 1961 48 Waiau 7 92 Steam, Reheat Base 1966 43 Waiau 8 94 Steam, Reheat Base 1968 41 Waiau 9 53 Combustion Turbine Peaking 1973 36 Waiau 10 54 Combustion Turbine Peaking 1973 36 Kahe 1 92 Steam, Reheat Base 1963 46 Kahe 2 89 Steam, Reheat Base 1964 45 Kahe 3 92 Steam, Reheat Base 1970 39 Kahe 4 93 Steam, Reheat Base 1972 37 Kahe 5 142 Steam, Reheat Base 1974 35 Kahe 6 142 Steam, Reheat Base 1981 28 HPOWER 46 Steam, Non-Reheat Base 1990 19 Kalaeloa 208 Combined Cycle Base 1991 18 AES 180 Steam, Reheat Base 1992 17 Major Independent Power Producers HECO Generating Units

38. System Load/Frequency Response to Trip

39. Goal is to Achieve Coordinated Control Response from all Units within Limit as a Team

40. Stage 1A: System Studies to Understand Impacts & Determine Feasibility

42. Permit Strategy & Considerations Undersea Cable Federal Permits - NEPA State Permits – Chap. 343 Oahu Infrastructure State/County Permits – Chap. 343 Wind Farms Permits – EIS Processes

43. Extruded Dielectric Cable Systems 1 - Conductor 2 - Inner Semi-Conductive Shield 3 - Extruded Solid Dielectric Insulation 4 - Outer Semi-Conductive Shield 5 - Semi-Conductive Swelling/Bedding Tapes 6 - Concentric Copper Wire Metallic Shield 7 - Semi-Conductive Swelling/Bedding Tapes 8 - Moisture Barrier/Sheath 9 - Protective Jacket Typical Extruded Dielectric Cable Cross-Section Source: Power Engineers

44. Transmission Line Construction Methods Typical trench excavation & duct bank installation Typical horizontal directional drilling set up Typical manhole installation Typical cable pulling set up Source: Power Engineers