May 22-23, 2008

ACC BTA Workshop May 22-23, 2008

Regional Renewable Energy Transmission Initiatives

Laurie WoodallK.R. Saline and Associates, PLC

Arizona Corporation Commission 5th Biennial Transmission Assessment

Docket E-00000D-07-0376

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Overview

Increasing public policy interest in renewable development

Need for more transmission in evidence

Specific initiatives addressing integration of renewable energy sources into system

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Public PolicyInterest in Renewables

Climate change / greenhouse gas concerns

Regulatory requirements-renewable portfolio standards

Diversity of fuel sources for growing load

Potential for federal regulation of conventional fuel sources - “Carbon Tax”

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Need for Transmission

Growing loads, transmission limitationsRenewables may be remotely located

without access to available transmissionFinancing of transmission can be

expensive and difficult for smaller intermittent renewable generators

Some studies, governmental/NGO private initiatives to address these issues

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WestConnect PlanningBiennial Long Range Study

A Westconnect–wide long range, conceptual study of transmission improvements needed to integrate renewables in the 10th year and beyond

Study will include findings of NREL wind/solar integration study, Colorado Resource Energy Zones Study, New Mexico collector study, and SWAT Renewable Task Force

Complete initial study in 2009

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Other Initiatives WGA West-wide Renewable Energy Zones

Regional initiative to identify best renewable resources and designate Renewable Energy Zones, based upon commercial potential and cost-performed by consultant

Inclusive stakeholder process to establish criteria to designate and validate zones for development

Develop conceptual transmission plans through WECC and subregional planning groups to deliver from highest ranking zones

Report to WGA re: commercial obstacles Identify options for interstate cooperation of planning and

permittingKick off meeting May 28, 2008 in Salt Lake City

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California Renewable Energy Transmission Initiative (“RETI”)

PG&E, SCE, and SDG&E filed renewable transmission reports with CPUC in September 2007

RETI formed with collaborating agencies and entities: CPUC, CEC, CAISO, Utilities, and other stakeholders

Purpose - identify transmission necessary for California to achieve its renewable energy goals in cost-effective and environmentally sensitive manner. Final B&V report 5/16/08

Study area includes CA, BC,WA, NV, OR, AZ and Baja Norte

Phases: Identify zones, identify conceptual transmission, assist in development of detailed plans

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Colorado Initiatives Clean Energy Development Authority (“CEDA”) to

develop three year plan, work with Colorado PUC & Colorado Coordinated Planning Group (“CCPG”)

SB 07-100 requires each regulated utility to:– Designate Resource Energy Zones, – Develop needed transmission plans, – Encourage locally owned renewables, and – Submit plans and CPCN applications

Utilities working with CCPG in phases: – April-July transmission planning groups, – November issue study plans, – Nov-Jan 09 prepare CPCN studies, – March 09 file CPCN applications, – Oct 09 file transmission plans

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Colorado Resource Energy Zones

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Nevada’s Initiative (“RETAAC”) Renewable Energy Transmission Access Authority

Created by Executive Order of the GovernorRPS - Nevada is a net importerPurpose:

– Identify and rank commercially developable locations for renewable energy

– Assess existing and planned transmission access to these resources

– Make recommendations for additional transmissionPhase 1 Report identified REZ, transmission required for

access to grid, recommended transmission linesFuture phases will include more detailed environmental

review

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NevadaRETAAC

Plan Circles/Ovals

Identify Renewable Energy Zones

Conceptual Transmission Plan Shown By Brown / Purple Lines

Per NPC/SPPC 5/19/08 SWAT presentation

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New Mexico’s Initiatives

SWAT New Mexico Study Group performed 2007 Cluster Study of Potential Wind Projects in Central NM

2007 Legislature created the New Mexico Renewable Energy Transmission Authority (RETA)

RETA’s Purpose:– Orchestrate multistate, multi-electric utility negotiations to

facilitate development of NM transmission infrastructure for renewable energy development and export

– Focus is on electric system transmission infrastructure planning, financing, and implementation

– A onetime only $1 million general startup fund authorized

2008 SWAT Renewable Task Force Study Participant

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Stage 5+Integration with High Plains Express

WillardWillardWillard

Ft. CraigFt. CraigFt. Craig

BABABA

BelenBelenBelen

GladstoneGladstoneGladstone

VL TapVL TapVL Tap

Total WindGuadalupe/Willard/Duran:

> 4000 MW (?)

• Build HPX 500 kV lines (may not need two circuits from Guadalupe to Ft Craig)

• Install 500/230 kV transformer at Gladstone• Install 500/345 kV transformer at Guadalupe• Install 500/345 kV transformer Ft Craig• Install 500/345 kV transformer at Duran

100

200

DuranDuranDuran

>1000250

>1000

150

400

Existing 345 kV line

New stationExisting station

Proposed wind projectExisting or committed wind project

Existing 115 kV line

New 345 kV line

1200

NM Wind Collector System Integrated with HPX

● Conceptual 345 kV Collector System in Central NM

● Cluster Study performed by PNM

Per 2007 SWAT NM Study Group

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Sources1. Nevada RETAAC: http://gov.state.nv.us/Energy/FinalReport.htm2. National Renewable Energy Lab Resource Center

http://www.nrel.gov/renewable_resources/3. New Mexico Renewable Energy Transmission Authority:

http://www.emnrd.state.nm.us/MAIN/RETA2.htm4. US Dept of Energy Efficiency and Renewable Energy: http://www.eere.energy.gov/5. WestConnect: http://www.westconnect.com/6. AZ Climate Change: http://www.azclimatechange.gov/index.html7. California RETI: http://www.energy.ca.gov/reti/index.html8. Colorado:

http://www.colorado.gov/energy/utilities/clean-energy-development-authority.asp 9. WGA: http://www.westgov.org/wga/initiatives/wrez/index.htm10. Clean Electric Resource Strategy:

http://www.westernresourceadvocates.org/media/pdf/Clean%20Electric%20Energy%20Strategy%20for%20Arizona.pdf

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Sources (Continued)11. TRANSMISSION RANKING COST REPORT OF SAN DIEGO GAS &

ELECTRIC COMPANY (U 902 E) FOR RENEWABLE PORTFOLIO STANDARD PROCUREMENT: http://www.sdge.com/regulatory/tariff/svc%20TRCR%20Filing.pdf

12. TRANSMISSION RANKING COST REPORT OF PACIFIC GAS AND ELECTRIC (U 902 E) FOR RENEWABLE PORTFOLIO STANDARD PROCUREMENT: http://www.pge.com/includes/docs/pdfs/b2b/energysupply/wholesaleelectricsuppliersolicitation/renewableportfoliostdsori-ii_other-doc_pge_20070907-01.pdf

13. TRANSMISSION RANKING COST REPORT OF EDISON ELECTRIC COMPANY (U 902 E) FOR RENEWABLE PORTFOLIO STANDARD PROCUREMENT: http://www.sce.com/nrc/rfp/2008_RPS_Appendix_D_SCE_TRCR.pdf