RMSUpdate January 6, 2005 Retail Market Subcommittee Update to TAC.
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Transcript of RMSUpdate January 6, 2005 Retail Market Subcommittee Update to TAC.
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January 6, 2005
Retail Market SubcommitteeUpdate to TAC
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Voting Items
Annual Validation Report to the ERCOT Board (Revised)
RMGRR 017 – Transaction Timing Matrix
RMGRR 016 – Oncor Name Change to TXU Electric
Delivery
Non-Voting Items
Load Research Sampling (LRS) Project Update
Agenda
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Annual Validation Report to the ERCOT Board (Revised) Do not replace a prior year non-default assignment with a default
assignment Apply dead-bands around the specified Residential Segment trigger point Apply a kWh minimum for Residential High Winter Ratio profile assignment Review use of more stable Residential Winter Ratio formula.
RMGRR 017 – Transaction Timing Matrix TITF initiative Capture the modifications to Chapter 15 Minor editorial changes
RMGRR 016 – Oncor Name Change to TXU Electric Delivery Name change only All sections affected
Voting Items
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Load Research Sampling (LRS)
Project Summary
As presented by ERCOT for RMS Meeting – 12/16/2004
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– Purpose: To collect load research data to support ERCOT’s load profiling efforts. The LRS data will be used to improve profiles and increase the accuracy of settlements.
– ERCOT’s responsibility – to select the load research samples and make the Load Profile data available to market participants.
– Sample locations were selected to distributed among each of 6 profile types and 8 weather zones.
• Profile Types = Residential Low Winter Ratio, Residential High Winter Ratio, Business No Demand, Business Low Load Factor, Business Medium Load Factor, Business High Load Factor
• Weather Zones = Coast, East, West, Far West, North, North Central, South, South Central
– TDSPs responsibility – to install IDR meters for data collection; performing VEE on collected data; and transferring data to ERCOT
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5 TDSPsMV90
CRCR
CRCR
ERCOT
IDRIDR IDR
IDR
NAESB EDM v1.6
HTTPS (FTP Replacement)
CRCR
CRCR
CRCR
CRCR
CRCR
CRCR
IDRIDR IDR
IDRIDR
IDR IDRIDR
LRS Data Flow
NOT USING EDI TRANSACTIONS
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UpdateUpdate LRS Project Summary -- Project• Project Measurement and Metrics
– Timeline• Project start date – May 2003• Project Deployment date – November 2004
– ERCOT Budget• Original Project Budget -- $1.5M • Actual charges to date -- $700k (Not including TDSP expense)
– (5) TDSPs Commitment• All TDSPs completed Pilot testing• Installed over 4200 IDR sample points• Sample point readings have been transmitted to ERCOT starting in
August 2004
– (13) CRs Commitment• All CRs have completed Pilot testing• ERCOT is in the process of building systems to transmit data to CRs
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UpdateUpdate LRS Project Summary • Market Summary
– TDSP Installation update as of 12/1/2004
– Ongoing ERCOT Responsibility• Verify sample point installation and transaction confirmation underway• Work with TDSPs on remaining installations and replacements (on-going)• Transition to O&M role for sample point management and tracking• Provide data to Market Participants as required
Company Installed
AEP North 366
AEP Central 581
Centerpoint 423
TXU Electric Delivery 2765
TNMP 105
Sharyland 1
Total 4241
Complete to Date 96.56%
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???
Questions
???
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1. Do not replace a prior year non-default
assignment with a default assignment
A new calculation for each ESI ID is made each year
Currently: Insufficient data requires assignment to default
Residential defaults to Residential Low Winter Ratio (RESLOWR)
Commercial defaults to Business Medium Load Factor (BUSMEDLF)
Proposed: If sufficient data was available in a previous year an
assignment to default would not be made
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2. Applying dead-bands around the specified
Residential Segment trigger point
Currently: If WR > 1.5 it is assigned to High Winter Ratio (HiWR)
Proposed: Create a dead-band around the 1.5 trigger point
Example – Assume dead-band (1.0 to 2.0)
if current assignment is RESLOWR and new WR = 1.7, would remain RESLOWR
if current assignment is RESLOWR and new WR = 2.1, would change to RESHIWR
Result - significant reduction in migration
SpringBaseFallBaseAverage
ADUseADUseADUseMaxWR febjandec
,
,,
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3. Use more than 1 month for the
Residential Winter Ratio formula
Example – Change numerator to average the ADU for
highest 2 months
Result - significant reduction in migration
SpringBaseFallBaseAverage
ADUseADUseADUseMaxWR febjandec
,
,,
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4. Apply a kWh minimum for Residential
High Winter Ratio profile assignment
Currently: None
Proposed: Identify a reasonable minimum usage for High
Winter Ratio assignment
Example – RESHIWR minimum = 10 kWh/day (300kWH/month)
If WR = 3.0 and 5 kWh/day then assign RESLOWR
If WR = 3.0 and 15 kWh/day then assign RESHIWR
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5. Use an ERCOT administered residential survey
to determine heating system type for a sample
of customers
The survey will empirically support data used to define dead-
bands, minimum thresholds and revised WR calculation
40,000 surveys will be mailed to end use customers
5,000 to each weather zone
2,500 to each existing profile type current assignment