MPT

1
Load Profiling

• How NIDR data is converted into 15-min settlement
  data

2
Load Profiling
Overview

• ERCOT requires a fifteen (15) minute settlement
  interval
• Vast majority of Customers do not have this level
  of granularity.
• Load Profiling
• Converts to fifteen (15) minute intervals
• Enables the accounting of energy usage in
  settlements
• Allows the participation of these Customers in
  the retail market (reduces barrier to entry)

3
Load Profiling

• Example- Cumulative Meter Read (non-IDR)
• Monthly TDSP meter read is submitted for a
  RESLOWR_SCENT ESI ID
• 1,500 kWh Cumulative Reading for 11/15/03 to
  12/14/03.
• Apply the published Backcasted load profiles to
  arrive at interval settlement data.

4
Load Profiling

• Example- Application of Backcast
• Backcasted Load Profile for RESLOWR_SCENT
• Profile Total 750 kWh (for 11/15/03 to
  12/14/03)

Backcast (Estimate)
5
Load Profiling
Application of Backcasted Load Profiles to an ESI
ID
0.90
0.80
0.70
0.60
0.50
kWh (15-minute)
0.40
0.30
0.20
0.10
0.00
12/1/03
12/2/03
12/3/03
12/4/03
12/5/03
12/6/03
12/7/03
12/8/03
12/9/03
11/15/03
11/16/03
11/17/03
11/18/03
11/19/03
11/20/03
11/21/03
11/22/03
11/23/03
11/24/03
11/25/03
11/26/03
11/27/03
11/28/03
11/29/03
11/30/03
12/10/03
12/11/03
12/12/03
12/13/03
12/14/03

Published RESLOWR_SCENT backcasted load profiles
for 11/15/03 thru 12/14/03
750 Total kWh
Actually applied to groups of ESI IDs with
similar characteristics.
6
Load Profiling

• Example- Finding the Ratio
• Find the scalar ratio between
• Meter Read Total 1500 kWh
• Profile Total- 750 kWh

1,500 kWh / 750 kWh 2.0
7
Load Profiling
Application of Backcasted Load Profiles to an ESI
ID
0.90
RESLOWR_SCENT ESI ID Meter Read 1,500 kWh from
11/15/03 thru 12/14/03.
Each published backcasted load profile value is
multiplied by a scalar of 2.0
0.80
0.70
0.60
0.50
kWh (15-minute)
0.40
0.30
0.20
0.10
750 Total kWh
Published RESLOWR_SCENT backcasted load profiles
for 11/15/03 thru 12/14/03
0.00
12/1/03
12/2/03
12/3/03
12/4/03
12/5/03
12/6/03
12/7/03
12/8/03
12/9/03
11/15/03
11/16/03
11/17/03
11/18/03
11/19/03
11/20/03
11/21/03
11/22/03
11/23/03
11/24/03
11/25/03
11/26/03
11/27/03
11/28/03
11/29/03
11/30/03
12/10/03
12/11/03
12/12/03
12/13/03
12/14/03

Actually applied to groups of ESI IDs with
similar characteristics.
8
Time-of-Use
Load Profiling

• Time of Use Meters
• Non-Time of Use Meters have one cumulative
  reading for the cycle
• Time of Use Meters have a cumulative reading for
  several time segments within the cycle (i.e.,
  peak and non-peak segments).
• Time of Use Meters typically carry different
  retail rates for certain times of day, thus the
  multiple time segment reading.
• Current system supports a maximum of 4 TOU
  periods

9
Load Profiling

• Example 2- TOU Meter Read (non-IDR)
• Monthly TDSP meter read for 8/01/06 to 8/30/06 is
  submitted for a RESHIWR_COAST ESI ID
• 300 kWh On-Peak reading
• 1200 kWh Off-Peak reading
• Apply the published Backcasted load profiles to
  arrive at interval settlement data.

10
Load Profiling

• Example- Application of Backcast
• Backcasted Load Profile for RESHIWR_COAST for
  8/01/06 to 8/30/06
• Profile On-Peak Total 600 kWh
• Profile Off-Peak Total 800 kWh

Backcast (Estimate)
11
Load Profiling
Application of Backcasted Load Profiles to a TOU
ESI ID
Published RESHIWR_COAST backcasted load profiles
for 8/01/06 thru 8/30/06 Actually applied to
groups of ESI IDs with similar characteristics. To
tal On-Peak 600 kWh Total Off-Peak 800 kWh
12
Load Profiling

• Example- Finding the Ratios
• Find the scalar ratios for On-Peak and Off-Peak
  time periods
• On-Peak Meter Read Total 300 kWh
• On-Peak Profile Total 600 kWh
• On-Peak Ratio 300/600 .5
• Off-Peak Meter Read Total 1200 kWh
• Off-Peak Profile Total 800 kWh
• Off-Peak Ratio 1200/800 1.5

13
Load Profiling
Application of Backcasted Load Profiles to a TOU
ESI ID
Each backcasted value in the Off-Peak period is
adjusted by the 1.5 Off-Peak scalar ratio
Actually applied to groups of ESI IDs with
similar characteristics.
14
Load Profiling
Application of Backcasted Load Profiles to a TOU
ESI ID
Each backcasted value in the On-Peak period is
adjusted by the 0.5 On-Peak scalar ratio
Actually applied to groups of ESI IDs with
similar characteristics.
15
Load Profiling

• Limitations
• Since NIDR scaling is based on monthly
  consumption values, daily usage differences are
  not accounted for

16
Load Profiling

• Example
• Three ESI-ids (RESLOWR_SCENT) have 1,500 kWh
  usage for 11/15/03 to 12/14/03
• ESI-id 1 used 50 kWh per day
• ESI-id 2 used 100 kWh per day for 11/15 to 11/19,
  0 kWh per day for 11/20 to 11/24, and 50 kWh per
  day for 11/25 to 12/14
• ESI-id 3 used 200 kWh per day for 11/15 to 11/19,
  0 kwh per day for 11/20 to 11/24, and 25 kWh per
  day for 11/25 to 12/14

17
Load Profiling

• Example continued
• All three ESI-ids would be settled using the
  exact same 15-min usage for the entire time
  period (11/15/03 to 12/14/03)