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California ISO PublicCalifornia ISO Public
Public policy-driven transmission planning
Sushant Barave
California ISO
June 20, 2018
Anchor Data Set (ADS) Webinar
California ISO Public
Create demand forecast & assess resource needs
CEC &
CPUC
With input from
ISO, IOUs & other
stakeholders
Creates transmission planISO
With input from CEC,
CPUC, IOUs & other
stakeholdersCreates procurement
planCPUC
1
2
3
fee
d in
to
With input from CEC,
ISO, IOUs & other
stakeholders
4
IOUs
Final plan authorizes procurement
Results of 2-3-4 feed into next biennial cycle
fee
d in
to
Overview of the planning and procurement process
Page 2
California ISO Public
Alignment of key infrastructure planning processes by CPUC, CEC and
CAISO staff*
Page 3
• The CPUC develops an
assumptions and scenario (A&S)
document through a public
process.
• This document is the vehicle for
incorporating California’s public
policy into CAISO TPP
• The accompanying diagram
shows the IEPR-LTPP-TPP
alignment which has seen minor
changes over the years as a
continuously evolving process.
* http://www.caiso.com/Documents/TPP-LTPP-IEPR_AlignmentExplanatoryText.pdf
California ISO Public
CAISO Transmission Planning Process (TPP)
Page 4
March 2019April 2018January 2018
• State and federal policy
• California Energy
Commission (CEC) -
Demand forecasts
• California PUC - Resource
forecasts and common
assumptions with
procurement processes
• Other issues or concerns
Phase 1 – Develop
detailed study planPhase 2 - Sequential
technical studies
• Reliability analysis
• Policy-driven analysis
• Economic analysis
Publish comprehensive
transmission plan with
recommended projects
ISO Board for approval
of transmission plan
Phase 3
Procurement
California ISO Public
Policy transmission evaluation aims to meet the policy directives while
minimizing stranded investments
Page 5
• CAISO tariff section 24.4.6.6 -http://www.caiso.com/Documents/Section24_ComprehensiveTransmissionPlanningProcess_asof_Sep27_2017.pdf
• Transmission solutions needed to meet state, municipal, county or federal
policy requirements or directives.
• Category 1 or Category 2
Category 1 – found to be needed and are recommended for approval as part of the
comprehensive Transmission Plan
Category 2 – could be needed to achieve state, municipal, county or federal policy
requirements or directives but have not been found to be needed in the current planning cycle
California ISO Public
State policy input is received from the CPUC in the form of resource
portfolios
• RPS portfolios reflect the state renewable policy goals
• Provide a projection of where renewable resources are expected to develop
to meet the state’s RPS
• The CAISO Board approves the transmission projects for cost allocation,
including projects to support public policy, with the understanding that state
agencies support the intent
• Transmission developers then apply to the CPUC for siting justifying their
projects as interconnecting the RPS portfolios that the CPUC provided to the
CAISO
Page 6
California ISO Public
Renewable policy-driven assessment is an iterative process that feeds
back into renewable portfolio creation
Page 7
Renewable Portfolios
Resource Mapping
Production Cost Simulation
Power flow base cases
Renewable curtailment and congestion
information
Generation dispatch and
path flow information
Transmission constraint information
Reliability Studies
Deliverability Assessment
CPUC’s RPS calculator has been
replaced by RESOLVE model in
the integrated resource plan (IRP)
to create renewable portfolios.
CEC staff worked with the ISO to
recommend specific buses for
modeling generic portfolio resources.
California ISO Public
Policy-driven transmission and FERC Order 1000
• FERC Order 1000 is comprised of regional planning and interregional coordination
components
• Public policy-driven transmission planning framework was incorporated into the CAISO’s
tariff before FERC Order 1000 (main driver was California’s 33% RPS)
• For the CAISO, FERC Order 1000 resulted in addition of competitive solicitation in its
regional planning and interregional coordination with other planning regions
• Public policies that have had the most significant impact on transmission planning are
– SB2(1x)
– SB350
– AB1318
Page 8
California's Renewables Portfolio Standard (RPS) was established in 2002 under Senate Bill 1078, accelerated in 2006 under Senate Bill 107, expanded in 2011 under Senate Bill 2(1x), and enhanced in 2015 by Senate Bill 350.
Retirement of once-through cooling generation; this policy is reflected in reliability analysis instead of policy-driven analysis.
California ISO Public
CAISO’s experience with FERC order 1000 and policy-driven transmission
evaluation
Page 9
Regional projects approved in order to meet public-policy needs
Regional selections completed through competitive solicitation
Interregional transmission project proposals*
1. Suncrest 300 MVAR dynamic reactive device2. Lugo – Mohave series capacitor upgrade3. Sycamore – Penasquitos 230 kV line4. Lugo – Eldorado 500 kV line re-route5. Lugo – Eldorado series capacitor and terminal equipment upgrade6. Warnerville – Bellota 230 kV line reconductoring7. Wilson – Le Grand 115 kV line reconductoring
1. Imperial Valley area collector station2. Gregg – Gates 230 kV transmission line3. Sycamore – Penasquitos 230 kV transmission line4. Miguel and Suncrest dynamic reactive support5. Estrella, Spring and Wheeler Ridge substations6. Delaney – Colorado River 500 kV transmission line7. Harry Allen – Eldorado 500 kV transmission line
1. TransWest Express (TWE)2. Cross-tie Transmission Line3. SWIP-North4. Desert Tortoise Expressway HVDC Conversion
*Mostly aimed at delivering wind resources from Wyoming and New Mexico into California
California ISO Public
Transmission underway to meet 33% RPS in 2020
Page 10
Transmission upgradeApproval status
OnlineISO CPUC
1 Carrizo-Midway LGIA NOC effective Energized
2Sunrise Powerlink Approved Approved Energized
Suncrest dynamic reactive Approved Pending 2019
3 Eldorado-Ivanpah LGIA Approved Energized
4 Valley-Colorado River Approved Approved Energized
5 West of Devers LGIA Pending 2021
6Tehachapi (segments 1, 2
& 3a of 11 completed)Approved Approved Energized
7 Cool Water-Lugo LGIA Pending 2018
8 Path 42 reconductoring Approved Not needed 2016
9 Sycamore-Penasquitos Approved Not yet filed 2018
10 Lugo-Eldorado line reroute Approved Not yet filed 2018
11Lugo-Eldorado and Lugo-
Mohave series capsApproved Not needed 2020
12 Warnerville-Bellota recond. Approved Not yet filed 2017
13 Wilson-Le Grand recond Approved Not yet filed 2020
$6.5 B
1
2
3
45
67
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10 11
12 13
California ISO Public
Page 11
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