Generation

1
Generation Transmission Modeling Work
Group(Jerry Vaninetti Paul Smith, Co-Chairs)

• Primary Tasks
• Model Development (LBNL/Black Veatch)
• Transmission Inputs for WREZ model
• WECC Transmission Planning
• Work Group 70 members all sectors represented
• Work Plan vetted internally and with WREZ
  committees
• July 24 webinar
• Formation of sub-groups on July 31
• Model Development Sub-Group Sept 12 meeting
  Oct. 7 webinar
• Straw man by LBNL model to be developed by BV
• Transmission Segments Sub-Group Oct. 10 chairs
  call
• Transmission Characteristics Sub-Group Oct 10
  chairs call
• Interface with other WREZ Work Groups
• Input requirements provided to ZITA on Sept 22
  (BV)

2
GTMWG Schedule
3
WREZ Modeling Scenarios
Stage 1
Stage 2
INCREASING COMPLEXITY
Stage 3
Wind
Solar
Load
Flow
Other
Gas-at-load
4
WREZ Power Delivery Screening Tool

• Lawrence Berkeley National Lab
• Black and Veatch
• Oct 15th, 2008
• Denver

5
Reminder of Objectives for Model

• Assist resource planers and regulators to
  evaluate the relative attractiveness of
  geographically broad renewable resource options
  at a screening level
• Estimate delivered costs of renewable energy
  options from Renewable Energy Zones (as defined
  by ZITA) to LSE-load areas
• Highlight potential for collaboration
  opportunities to develop transmission to access
  renewable resources

6
WREZ Power Delivery Screening Tool

• Flexible Excel-based model
• Allow users to
• assess cost and value of renewable resources
• identify potential transmission collaboration
  opportunities
• Develop scenarios using alternative assumptions
• Integrates effort of WREZ work groups
• ZITA
• GTMWG
• E L

7
Straw-man
Local resource
REZ
Ranking determined from perspective of load zone
for all resources
LSE
Highly ranked REZ resource
8
Straw-man
Local resource
Ranking is calculated for all load zones
simultaneously
REZ
LSE
Highly ranked REZ resource
9
Multi-REZ/ Single Load Zone
Local resource
REZ
Multi-REZ/ Single Load Zone Analysis shows
potential benefit of combining multiple resources
on a single line
LSE
Highly ranked REZ resource
10
Multi-REZ/ Multiple Load Zone
Local resource
Multi-REZ/ Multi-Load Zone Analysis shows
potential benefit of combining resources on a
single line with multiple on-ramps and off ramps
REZ
LSE
Highly ranked REZ resource
11
Point-to-Point
Multi REZ to Single Load Point
Multi REZ to Multi Load Points
Delivery point
Node
Line w/ single resource
w/ multiple resources
Geothermal REZ
Wind REZ
Modeling Approach

• User selects a transmission route between
  multiple REZs and multiple load centers
• Calculate the supply curve at every node

• User selects a transmission route between
  multiple REZs and a single load center
• Calculate the supply curve at every node

• Starting point distance between load center and
  REZ
• Calculate transmission cost, transmission loss
  and delivered cost of energy

12
WREZ Model Information Flow
Transmission Segments Group
ZITA
Transmission Characteristics Group
Resource Data
Market Value Adjustments for Each Load Zone
Transmission Route and Cost
Master Control Interface
Processor
Extra Resource
Transmission Routing Tool
Assumptions
Transmission Segments Group

• Outputs
• Adjusted Delivered cost of resources
• Energy profiles
• Identification of potential partners
• Resource and transmission data

13
Model Outputs

• Model will provide detailed resource and
  transmission information
• Generation Resource Information
• Resource characteristics and operation
• Busbar cost, delivered cost, resource value to
  user
• Transmission Information
• Cost based on GTMWG sub-group identified
  transmission routes and costs
• Collaboration Information
• Identification of other load areas that may be
  interested in similar resources

14
Summary of Inputs Required from ZITA

• REZ information
• Identification of REZs and list of resources
  included in each REZ
• Coordinates (location) of the collector point to
  which all renewable resources within each REZ
  will interconnect (e.g., the centroid of the
  zone, or otherwise)
• Cost and Performance
• Fixed and variable costs
• Temporal profiles
• Financing, tax, and subsidy (tax credit,
  accelerated deprecation etc) assumptions