ELECTRIC GENERATION AND TRANSMISSION IN THE RAILBELT Joe Griffith - - PowerPoint PPT Presentation

ELECTRIC GENERATION AND TRANSMISSION IN THE RAILBELT

Commonwealth North November 15, 2013

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Joe Griffith General Manager, MEA Chief Executive Officer, ARCTEC

RAILBELT MAKEUP

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• Electrical utilities are all cooperatives or municipalities
• Anchorage Municipal Light & Power
• Seward Electric System
• Chugach Electric Association
• Golden Valley Electric Association
• Homer Electric Association
• Matanuska Electric Association

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RAILBELT ELECTRICAL GENERATION

1 – Eklutna Generation Station (EGS) 2 – Bradley Lake 3 – Soldotna 4 – Nikiski 5 – Fire Island 6 – SPP 7 – ML&P Plants 2 & 2A 8 – Beluga 9 – Mount Spurr Geothermal Project 10 – Watana 11 – Eva Creek 12 – Healy 2 (HCC) 13 – Battery Energy Storage System (BESS) 14 – Zehnder 15 – North Pole

RAILBELT GENERATION SUITE

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• Chugach – Beluga, South Anchorage, IGT, Cooper Lake hydro, Eklutna hydro
• AML&P – Plant 1, 2, & 2A (soon to be built), Eklutna hydro
• GVEA – North Pole, Eva Creek Wind, Healy 1 & 2, Aurora (IPP), BESS, Zehnder
• MEA – Eklutna Generation Station, Eklutna hydro, + 2 small IPPs
• HEA – Nikiski combined cycle, Soldotna, Bernice Lake
• SES – Seward plant

Note: All above participate in Bradley Lake hydro (state-owned IPP)- 124 mW capacity

RAILBELT GENERATION

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• All utilities have or will soon have their own generation capability
• New generation cost is approximately $1 billion
• Utility balance sheets are stressed
• No additional debt-assuming capability

SITUATION

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• New generation system changes playing field due to transmission constraints
• Limits Bradley Lake power deliveries when needed most.
• Railbelt economy demands reasonably-priced power (as does the rest of Alaska)

RAILBELT TRANSMISSION SYSTEM

• What it does
• Connects utilities
• Facilitates economic dispatch
• Transfers power
• Shares reserves
• Two main challenges
• Physical infrastructure constraints
• Management

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AEA TRANSMISSION STUDY

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• Southern section upgrades proposed:
• Quartz creek to University (AC)
• Additional conductor from Quartz Creek to Daves Creek
• 230 kV upgrade from Daves Creek to University s/s
• DC tie line from Bernice Lake to Beluga
• 2nd 115kV line from Bradley Junction to Soldotna
• Anchorage battery
• Northern Upgrades
• 230 kV Lake Lorraine to Douglas upgrade
• Douglas to Healy upgrade

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Current Railbelt Transmission System

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Proposed Upgrades to Transmission System

AEA TRANSMISSION STUDY – CASES MODELED

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• Scenario 1:

All transmission upgrades

• Scenario 2:

Southern transmission upgrades

• Scenario 3:

Northern transmission upgrades

• Scenario 4:

No transmission upgrades

AEA TRANSMISSION STUDY – NO TRANSMISSION UPGRADES

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• The system operates as 5 separate utilities
• Each provides its own reserves
• The interface limit for Kenai North is 75 MW
• The transfer limit from Stevens (Talkeetna) to Cantwell is 75 MW
• North Pole combined cycle plant is “must-run” October through March
• Bradley Spin is only 10 MW
• Commitment/Dispatch hurdles exist between all utilities
• Opportunity cost of over $140 million per year

AEA TRANSMISSION STUDY – VALUE OF PROPOSED UPGRADES

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• $140,000,000 per year

SHORT-TERM ENERGY DELIVERY MITIGATIONS

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• Decongest the transmission system to facilitate optimum use of Bradley Lake energy and

capacity

• Create a single transmission operator
• Maintain Cook Inlet gas market
• Foster more exploration in Cook Inlet
• Import LNG and/or propane

ARCTEC 2014 REQUESTS

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• Unconstrain Bradley Lake
• Silvertip Creek to Hope Substation 115 kV transmission line 4,500,000
• Powerline Pass to Indian 115 kV transmission line

5,000,000

• Eklutna hydro transmission upgrade

4,000,000

• Battle Creek Diversion into Bradley Lake

$24,000,000

• 50/50 Shared cost between State of Alaska and utilities.

TOTAL REQUEST: $37,500,000

Transco

Transco - A transmission owning entity

• A regulated entity which owns,

constructs, and maintains transmission lines used to transmit wholesale power

• It may or may not handle power dispatch

and coordination

• Secures financing
• Executes project

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ISO – An Independent System Operator

Description

• An ISO owns no assets
• It is neutral party responsible for planning,

management and control of the electric transmission grid in a state or region

Characteristics

• Ensures non-discriminatory access;
• Possession of operational authority for all

transmission facilities under the ISO’s control; and

• Exclusive authority to maintain short-term

reliability.

• Regulatory Compact
• Plans, conditions and approves projects

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The Railbelt Model

TRANSCO = Alaska Railbelt Cooperative Transmission & Energy Company (ARCTEC) ISO = Railbelt Reliability Authority

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ARCTEC as TRANSCO

Non-discriminatory open access

• Existing assets from transmission providers are pooled for joint use

with full cost recovery for all users

Universal rates based on system load that will encourage economic transfer of generation across network

• Transition to Full implementation
• Single control area within 5 years
• Economic dispatch within 10 years

Regional planning for all future transmission

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Railbelt Reliability Authority as ISO

Adoption of IMC Reliability Standards Plan and Condition Projects Enforce Standards Regulatory Compact Ensure Non-discriminatory Transmission Access Single System-wide Transmission Rate Responsible for Short-term Reliability

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INDEPENDENT POWER PRODUCERS (IPPs)

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• Federal law: Public Utility Regulatory Policies Act (PURPA, 1978)
• Avoided cost principle for Combined Heat and Power (CHP) utilities
• Must meet or beat avoided cost (2 types)
• Firm and non-firm
• Alaska RCA regulations mimic federal PURPA
• Rate of return: co-ops 3-5% / IPPs need 10%+
• IPPs have filed with the RCA to change regulations
• IPPs pushing for Alaska statute changes to force utilities to accept their power at the

expense of ratepayers

CONCLUSION

• Without a program to rectify transmission shortcoming asap
• Cost of electricity will continue to rise
• Possible savings will be forfeited
• Alaska will not achieve its alternative energy goal
• Railbelt will be captive to Cook Inlet natural gas pricing and supply issues

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DISCUSSION / QUESTIONS

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AEA TRANSMISSION STUDY – ALL TRANSMISSION UPGRADES CASE

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Base Case

• The system operates as a single pool with a single system reserve requirement
• The interface limit for Kenai North is 125 MW
• Anchorage battery is 25 MW
• Bradley spin is 27 MW

AEA TRANSMISSION STUDY – SOUTHERN TRANSMISSION CASES

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Case S1: Remove AC upgrades from Quartz Creek to University

• The system operates as a single pool with a single system reserve requirement
• The interface limit for Kenai North is 100 MW
• Anchorage battery is 25 MW
• Bradley spin is 27 MW

Case S2: Remove DC tie

• The system operates as a single pool with a single system reserve requirement
• The interface limit for Kenai North is 75 MW
• Anchorage battery is 75 MW
• Bradley spin is 27 MW

AEA TRANSMISSION STUDY – SOUTHERN TRANSMISSION CASES

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Case S3: Do both S1 and S2

• The system effectively operates as 2 pools
• Railbelt minus HEA
• Shared reserves
• HEA
• HEA provides its own reserves
• The interface limit for Kenai North is 75 MW
• Bradley spin is 27 MW
• Commitment/Dispatch hurdles exist between all other companies and HEA

AEA TRANSMISSION STUDY – SOUTHERN TRANSMISSION CASES

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Case S4: Case S3 + remove 2nd line from Bradley to Soldotna

• The system effectively operates as 2 pools
• Railbelt minus HEA
• Shared reserves
• HEA
• HEA provides its own reserves
• The interface limit for Kenai North is 75 MW
• Bradley spin is 10 MW
• Commitment/Dispatch hurdles exist between all other companies and HEA