Jan Strack
San Diego Gas and Electric
TEPPC Overview
TEPPC Review Task Force
January 11, 2016
Salt Lake City, UT
Organizational Chart
WECC
Western Electricity
Coordinating Council
PCC
Others …
Planning Coordination
Committee
TEPPC
RPCG
Transmission Expansion
Planning Policy
Committee
Regional Planning
Coordination Group
TSS
TAS
SPSG
Technical Studies
Subcommittee
Technical Advisory
Subcommittee
Scenario Planning Steering
Group
Others …
SWG
Study Work Group
EDWG
Environmental Data Work
Group
DWG
Data Work Group
MWG
Model Work Group
HMTF
Hydro Modeling Task
Force
2
TEPPC
Transmission Expansion Planning Policy Committee
• Conduct and facilitate economic transmission planning
– Develop and maintain public database for economic grid simulations
and related analyses
– Develop and implement inter-regional transmission expansion
planning processes
•
•
•
•
Coordinate with Planning Coordination Committee (PCC)
Other WECC Committees
Regional Planning Groups (RPGs)
Other stakeholders
– Guide and improve economic and operational analyses and modeling
• Conduct related transmission utilization studies
• Conduct related transmission expansion studies
– Prepare inter-regional transmission planning assessments
• Accept study requests on an annual basis
• Approve an annual study program
3
Large Scale Grid Planning
• Load/Resource Balance
– Load forecasts (including energy efficiency and behind-the-load meter
generation)
– Dependable capacity from existing and planned generation
– Minimum planning reserve margins
• Generation Production Costs
– fuel and variable O&M costs
– carbon costs
– opportunity costs (e.g., costs of curtailing renewable output)
• Capital Costs
– Policy-driven generation and transmission additions
• Renewable Portfolio Standards (RPS)
• Clean Power Plan 111(d) requirements
• Greenhouse gas (GHG) reduction targets
– Commercially-driven generation and transmission additions
• Utility and merchant developer plans
• Generic additions
4
TEPPC Work Products
5
TEPPC’s Study Tools
• Economic Grid Simulation Model – ABB’s GridView
– 10-year: “Snapshot” AC data describing electric system topography:
transmission lines, substations, generators, loads (converted for use in a DC
solution model)
– Snapshot data expanded to cover 8760 hours:
• Loads
• Run-of-river hydro output, other must-take generation
• Wind and solar output profiles
– Economic data:
•
•
•
•
•
fuel prices,
heat rates for thermal units
carbon costs
opportunity costs (e.g., curtailment costs for renewable resources)
institutional friction between balancing authorities
– For each hour, dispatch generation to minimize variable costs subject to
system constraints:
• Load-resource balance
• Path ratings and transmission facility ratings
• Generator capabilities (maximum and minimum output levels, start-up/shut-down times,
ramp rates)
6
TEPPC’s Study Tools (cont.)
• Transmission Capital Cost Calculator
– Generic cost estimates for transmission elements
– Accounts for general terrain differences, environmental mitigation costs
• Generation Capital Cost Calculator
– Generic estimates for different generation technologies
– Accounts for projected technology improvements (“learning curves”)
• Long Term Planning Tool- LTPT
–
–
–
–
Generation and transmission expansion model
Accounts for environmental constraints when identifying new transmission
Very simplified production cost assessment
Used for long-term assessments (20 year horizon)
• Environmental Data Viewer – DataViewer
– Combines environmental data layers using a visual format with a granularity of
around 0.5 x 0.5 km
– Accounts for terrain, water features, population centers, land use,
transmission corridors
– Identifies development exclusion areas, protected species locations
– Assigns one of four environmental risk classifications to each cell
7
Information Flow & Review Process
TEPPC
Charter
Goal : Consensus
If needed : Member voting
TAS
SPSG
Charter
Goal : Consensus
If needed : Advisory voting
EDWG
Charter
Goal : Consensus
If needed : Advisory voting
Charter
Goal : Consensus
• “Issue voting” for all present
• “Process voting” by members
DWG
Goal : Consensus
MWG
Goal : Consensus
SWG
Goal : Consensus
SPSG
Scenario Planning Steering Group
• Provides strategic guidance to TEPPC on:
– Emerging policy, regulatory, environmental, industry and social trends
relevant to transmission expansion
– Future scenarios to be modeled in studies
– Modeling tools and datasets to be used
– Key assumptions to be used in creating and reviewing the scenarios
– Metrics to be used in modeling future scenarios
• Has defined four possible scenarios for long-term evolution
of the western electric system
• Long Term Planning Tool (LTPT) used to simulate possible
outcomes for each scenario
• Monitors “early indicators” on an on-going basis to assess
likelihood of each scenario and to adjust scenarios
• Provides direction to EDWG
9
SPSG and 20-Year Studies
• Uses Long Term Planning Tool (LTPT) for 20-year
generation and transmission expansion studies
• Builds a 20 year LTPT “Reference Case” by
extrapolating data from the 10 year GridView
“Common Case”
• LTPT-based studies intended to illustrate impacts
of key issues under different credible futures
(four scenarios):
–
–
–
–
“Economic recovery”
“Clean energy”
“Short term consumer cost focus”
“Long term societal cost focus”
10
EDWG
Environmental Data Work Group
• Provides a forum for engaging stakeholders to collect
and review environmental data with relevance to
generation and transmission expansion planning
• Develop methodologies for applying environmental and
cultural resource data to transmission planning (e.g.,
identify excluded or high risk land areas for
infrastructure development)
– Land classification system that identifies high to low-risk areas
(4 risk categories)
– Provides the opportunity to avoid or mitigate environmental
and/or cultural risks at the planning level
• Regional environmental mitigation cost study for
recently built transmission lines
11
RPCG
Regional Planning Coordination Group
• The RPCG is made up of a member from each TEPPC-recognized
Regional Planning Group.
– Alberta Electric System Operator ( AESO)
– British Columbia Coordinated Planning Group (BCCPG)
– California Independent System Operator (CAISO –FERC Planning
Region)
– California Transmission Planning Group (CTPG)
– ColumbiaGrid (FERC Planning Region)
– Northern Tier Transmission Group (NTTG - FERC Planning Region)
– WestConnect (FERC Planning Region)
• Purpose of group is to coordinate planning activities between and
among the Regional Planning Groups and TEPPC.
12
TAS
Technical Advisory Subcommittee
•
•
Advises TEPPC in technical matters
Undertakes studies a the direction of TEPPC related to:
– Economic expansion of the Bulk-Power System
– Policy-driven expansion of the Bulk-Power System
•
Recommends technical details regarding TEPPC’s
– Databases and their management (for both economic grid simulation and capital expansion
studies)
– Proposed annual study program
– Preparation of reports describing assumptions, analysis, results and recommendations
•
•
•
•
•
Conducts economic grid simulation modeling
Conducts capital expansion studies
Evaluate study results to facilitate economic expansion of the Western
interconnection
Determines software or modeling requirements and evaluates modifications to
existing WECC computer programs related to transmission expansion planning
Evaluate and explore new developments and techniques of interest to WECC
13
DWG
Data Work Group
• With stakeholder input, develops and adjusts data necessary to execute
TEPPC’s annual study program. For example:
–
–
–
–
–
–
–
–
–
Annual and monthly forecast peak and energy by region
Fuel prices by region
Update thermal unit heat rates
Monthly hydro production (low, average and high hydro years)
Incremental energy efficiency by region
Behind-the-load meter generation by region
Hourly energy shapes by location (load, hydro, wind, solar)
“Gap resources” to meet minimum planning reserves in each region
Resource/demand-side additions to satisfy Local Capacity Requirements
• Receives AC “snapshot” power flow case from Technical Studies
Subcommittee (TSS )of the Planning Coordination Committee (PCC)
– Converts AC “snapshot” power flow case into a DC model compatible with
economic grid simulation model (which employs a DC solution algorithm)
14
Data Work Group Tasks
• With significant stakeholder support, the DWG
is developing “Round Trip” capability
– Goal is an efficient method to:
(i) convert an AC “snapshot” power flow case into the system
topography for an 8760 hour DC grid simulation model, and
(ii) extract any hour from the DC grid simulation model and
convert that hour into an AC “snapshot” power flow case
– Will facilitate economic studies of reliabilitybased transmission upgrades
– Will facilitate detailed reliability studies of
expected system conditions
15
MWG
Model Work Group
• Recommends modeling approaches and refinements to
capture important aspects of electric system operation. For
example:
– Implementation of operating reserve sharing load areas
– Defining trading hubs
– Developing inter-regional hurdle rates to capture institutional
fraction between areas
– Modeling California’s AB32 taxes on carbon-based generation
used to serve California loads
• Evaluates and proposes modeling improvements for the
TEPPC study programs, for example, pumped hydro look
ahead logic, battery dispatch, Monte Carlo, changes to
internal data documentation, speed of computation
16
HMTF
Hydro Modeling Task Force
• Reports to MWG
• Determines how to accurately model and
account for hydroelectric resources in TEPPC
study cases.
• Examples of projects of the HMTF
– Assemble high, low, and medium hydro condition
data sets
– Pumped Storage Analysis Tool
– Historic Hydro Dispatch Dashboard Tool
17
SWG
Studies Work Group
• Screens study requests submitted in annual study request window
• Prioritizes study requests and submits priority recommendations to
TAS (for subsequent approval by TEPPC)
• Processes requestor appeals of study priorities adopted by TEPPC
• Responsible for establishing the assumptions used in each of the
study cases for TEPPC’s annual study program
• Manages the completion of the study cases approved in TEPPC’s
annual study program
• Example Study Cases
–
–
–
–
Coal Retirement Study
Retire IPP Coal Plant and add 1200 MW combined cycle plant at IPP)
CAES, Zephyr and 12,000 gWh of wind in Eastern Wyoming
High PV saturation above California’s RPS standard
18
SWG Manages TEPPC’s Study Program
Jan
Feb-Mar
April - Dec
Oct-Dec
Open Season for Study
Requests
Draft Study Program
Development
Analysis and Reporting
Transmission Report
Development
19