LMP Base Cases
Presented to:
NEPOOL Markets Committee
November 19, 2001
Robert B. Burke
Agenda Item #411/19&20/01 MC Mtg.
Contents
• LMP Publishing Process
• LMP Overview
• Static Base Case– What was analyzed?
– How it was analyzed
– Summary of Results
• Next Steps
Static Cases
• Purpose:– Demonstrate software development progress
– Provide Participants with samples effects of possible
transmission line outage
– Test new unit dispatch software (EMP, UDS/SPD)
Future Releases
• Purpose:– Provide Participants with snapshot of actual system dispatch
with possible LMP values
– ISO will try to choose a dispatch cycle from the prior month with
congestion
– Test changes to new unit dispatch software (EMP, UDS/SPD)
Participant Input
• Technical session to review static cases– December 5 - Springfield Sheraton
– Register on-line at the ISO web site
• Are there additional “static” cases you would like
to see?– Email by December 14:
– ISO will review suggestions and release results of those cases
analyzed
What is LMP?
• Locational Marginal Price - cost of supplying the
next MW of load
• When congestion is present, locational marginal
prices may be different by zone
3 Bus Example - 1
Generator-1Capacity = 300 MW$10/MW
Generator-2Capacity = 200 MW$15/MW
Generator-3Capacity = 200 MW$20/MW
Load 2 = 499 MWMarket Clearing Price = $20
Load 1 = 100 MWMarket Clearing Price = $20
100 MW
200 MW
400 MW
99 MW
3 Bus Example - 2
Generator-1Capacity = 300 MW$10/MW
Generator-2Capacity = 200 MW$15/MW
Generator-3Capacity = 200 MW$20/MW
Load 2 = 499 MWLMP = $20
Load 1 = 100 MWLMP = $10
Thermal limit 150 MW
150 MW
100 MW350 MW
149 MW
What is Presented?
• Static base case
• Each Analysis Represents a Separate
Transmission Line Outage
• Resulting LMP values
Static Cases
• Started with secure network
• Actual system from September 4, 2001
• Hour Ending 15
• Load 18,375 MW
Data
• Load
• Generation
• Tie line flow
• Units on-line
• Unit bid data
• UDS/SPD agreed with Couger
How analysis was run
• Transmission Line removed from service
• Contingency analysis performed
• Contingencies identified
• Overload identified (binding constraint)
What’s in & What’s not
We included: • Power Flow Model
• Unit Bid Model
and enforced:
• Unit Capacity Limits
• Unit Ramp Rate Limits
• Generic Constraints
We didn’t include:• Transaction Model
• Inc/Dec Bid Model
• Reserve Model
• Market Power Mitigation
Cases Analyzed
Case Primary Transmission Line Removed1 Golden Hills-Mystic (349XY)2 Quaker Hill-Three Rivers 115 kV (197)3 Scobie-Sandy Pond (326)4 Card St.-Lake Road 345 kV (330)5 Norwalk-Northport 138 kV cable (1385)6 Grand Ave-Elm West (89003B)7 E. Springfld-E.Spring.Jct.-Piper 115 kV(1723)8 Canal-Carver St. 345 kV (322)9 Essex-Williston 115 kV (K23)10 Brayton-W. Farnum 345 kV (315)
PIPER
EASTSPRINGFIELD
FAIRMONTNORTH
BRECKWOODWEST
SPRINGFIELDAGAWAM
77
LINE 1723
SHAWINIGANCHICOPEE
LINE 1322
LINE 1254
LUDLOW
ORCHARD
ELM
POCHASSIC
SILVER
LINE 1433
Line 1723(E. Springfield - E. Springfield Junction - Piper)
PRECONTINGENCY STATELMP = $39.59
PIPER
EASTSPRINGFIELD
FAIRMONTNORTH
BRECKWOODWEST
SPRINGFIELDAGAWAM
LINE 1723
SHAWINIGANCHICOPEE
LINE 1322
LINE 1254
197 (193)
LUDLOW
ORCHARD
ELM
POCHASSIC
SILVER
LINE 1433
Line 1723(E. Springfield - E. Springfield Junction - Piper)
CONTINGENCY STATE
PIPER
EASTSPRINGFIELD
FAIRMONTNORTH
BRECKWOODWEST
SPRINGFIELDAGAWAM
LINE 1723
SHAWINIGANCHICOPEE
LINE 1322
LINE 1254
192 (193)
LUDLOW
ORCHARD
ELM
POCHASSIC
SILVER
LINE 1433
Line 1723(E. Springfield - E. Springfield Junction - Piper)
LMP WCMA Zone = $66.62LMP CT Zone = $39.20LMP other Zone = $38.25
SCOBIE
SEA BROOKSANDY POND
LINE 326
LINE 394
LOAD CENTER
GREGGSGREGGSMERRIMACK
LINE A253
LINE 363
LINE B202
LINE R187LINE C196LINE Q171
Line 326(Scobie - Sandy Pond)
PRECONTINGENCY STATELMP = $39.11
SCOBIE
SEA BROOKSANDY POND
LINE 326
LINE 394
LOAD CENTER
GREGGSGREGGSMERRIMACK
LINE A253 315(305)
LINE 363
LINE B202
LINE R187LINE C196LINE Q171
Line 326(Scobie - Sandy Pond)
CONTINGENCY STATE
SCOBIE
SEA BROOKSANDY POND
LINE 363LINE 326
LINE 394
LOAD CENTER
GREGGSGREGGSMERRIMACK
LINEA253
LINE B202
LINE R187LINE C196LINE Q171
302(305)
Line 326(Scobie - Sandy Pond)
LMP ME Zone = $15.50 LMP NH Zone = $31.28LMP WCMA Zone = $40.41 LMP NEMAB Zone = $41.78LMP other Zones = $40.11
Future Analyzes
• Possible additional studies from this static base
case
• Release LMP values for a dispatch cycle once a
month– Zonal LMP values
– Binding Constraints
Need more information?
• SMD Overview and Locational Marginal Pricing
training session– Sessions last week in November and first week in December
• Register on-line– Customer, Seminars and Training