texas nodal network modeling and telemetry tac meeting by raj chudgar, ercot friday, 12/01/2006
DESCRIPTION
Texas Nodal Network Modeling and Telemetry TAC Meeting By Raj Chudgar, ERCOT Friday, 12/01/2006. NMT – Network Operations Modeling & Telemetry - Project. Agenda Network Model Data Issues Overview Automated Data Query Results by Market Participant Process Summary of issues to date - PowerPoint PPT PresentationTRANSCRIPT
1 Texas Nodal
Texas Nodal
Network Modeling and TelemetryTAC Meeting
By Raj Chudgar, ERCOT
Friday, 12/01/2006
2 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
Agenda– Network Model Data Issues
• Overview• Automated Data Query Results by Market Participant• Process• Summary of issues to date• Progress by Market Participant to date
– Critical Measurements Update• Overview• Counts by Market Participant • Critical Measurement Definitions
– Summary
– ERCOT TDSP Road Show Update
3 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
Network Model Data Issues
4 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
Determining Model Data Issues Process– Developed a series of queries looking for plausibility issues
concerning:• Modeling Issues
• ICCP Mapping Issues
– Queries run every 2 weeks after each Genesys EMS database load
– Queries generate issues which are loaded into an Access database
– Issues are assigned to NMT project team members to investigate and resolve internally within ERCOT as a first step
• Procedures have been documented on how to investigate and resolve issues
– Remaining unsolved issues are discussed with individual Market Participants to resolve
5 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
Model Data Issue ProcessNMT / Market Participant Process
Mar
ket
Par
tici
pan
tsO
per
atio
ns
Mo
del
ing
EM
MS
Pro
d
ICC
PN
MT
Sys
tem
s O
per
atio
ns
Handover items > 30 days old
Manage Production Data Issues
Data Query Process
ICCP Data Research
Network Model Data Research
Determine Priority and
Assign
Internal review to determine items to send
to MP
NMT SE Spreadsheet
Pending
NMT SE Spreadsheet
To Implement
Create Service Request
Implement
Implement
NMT SE Spreadsheet
Closed
Determine Resolution
Scheduled Meeting
Verify Implemented
Items
NMT SE Spreadsheet
Assigned
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NMT – Network Operations Modeling & Telemetry - Project
Model Data Issues Query Result Set – as of 11/17/2006
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NMT – Network Operations Modeling & Telemetry - Project
Model Data Issues Progress by MP – as of 11/17/2006
Description Initi
al C
onta
ct E
stab
lishe
d T
elem
etry
Ana
lysi
s C
omm
unic
ated
Tel
emet
ry A
naly
sis
Com
plet
ed D
ata
Que
ry Is
sues
Iden
tifie
d T
elem
etry
Dat
a Is
sues
P
endi
ng
Ass
igne
d
T
o Im
plem
ent
C
lose
d
Mo
del
ing
Dat
a Is
sues
P
endi
ng A
ssig
ned
T
o Im
plem
ent
C
lose
d
TO
TA
L D
ata
Issu
es
Pen
ding
Ass
igne
d
T
o Im
plem
ent
C
lose
d
T
OT
AL
%
Co
mp
lete
%
Pen
din
g
Austin Energy P P 0% 100% 57 3 78 2 5 0 59 3 83 145 57% 0%American Electric Power P P 35% 100% 372 229 1 190 1 11 373 229 1 201 804 25% 46%Brazos Electric Cooperative P P 75% 100% 120 164 1 0 120 0 165 285 58% 0%Bryan Texas Utilities P P 35% 100% 18 10 2 1 18 11 0 2 31 6% 58%Centerpoint P P 35% 100% 2 131 34 298 3 10 6 2 134 44 304 484 63% 0%City Public Services P P 50% 100% 29 20 55 6 0 35 20 55 110 50% 0%Denton Municipal Electric P P 50% 100% 7 11 1 1 7 11 0 2 20 10% 35%Garland Power and Light P P 50% 100% 42 2 14 0 42 2 14 58 24% 0%
100% 4 9 1 4 9 0 1 14 7% 29%Lower Colorado River P P 50% 100% 279 53 7 71 2 9 279 55 7 80 421 19% 66%Brownsville Public Utilities P P 25% 100% 22 14 1 0 22 0 15 37 41% 0%Qualified Scheduling Entities 26 14 4 1 27 14 0 4 45 9% 60%
100% 7 1 5 7 1 0 5 13 38% 54%South Texas Electric Coop P P 50% 100% 82 48 3 0 82 3 48 133 36% 0%
100% 4 4 0 0 0 4 0% 100%Texas Municipal Power Auth P P 10% 100% 20 22 6 20 22 0 6 48 13% 42%Texas-New Mexico Power P P 0% 100% 44 54 1 1 0 45 0 55 100 55% 0%Texas Utilities P P 40% 100% 1311 100 75 1 3 4 6 1312 103 4 81 1500 5% 87%
0 2050 976 67 1080 0 3 18 17 41 0 2053 994 84 1121 4252 26% 48%
Note 1: Blank TDSP indicates ones that ERCOT has not contacted to dateNote 2: NMT inherited ~400 legacy model issues
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NMT – Network Operations Modeling & Telemetry - Project
Critical Measurements Telemetry Analysis
9 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
Critical Measurements Update– Identify possible new Telemetry as required by Nodal Protocols
and Criteria• Input based on ERCOT snapshots – normal & peak loads• Processed using GEN-SE tool by Nexant• NMT provided spreadsheets to each MP• MPs must provide new telemetry (schedule) or justifications, (e.g. why not
needed) for each point
– NMT is working with each MP when there are questions– MPs submit Service Requests when issues are identified– Next Steps (on-going)
• NMT / Nexant will rerun analysis after Service Requests are implemented• NMT will provide results back to MPs• NMT will have final schedules for new telemetry or documented justifications
10 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
Critical Measurement Counts by MP
MP Description Cri
tica
l Bu
ses
69
KV
138
KV
Tot
al
Un
ob
serv
able
Bu
ses
69
KV
138
KV
345
KV
Tot
al
Wea
kly
Ob
serv
able
Bu
ses
69
KV
138
KV
Tot
al
Co
mb
ined
Bu
ses
TO
TA
L
% o
f TO
TA
L
AEN Austin Energy 0 0%
AEP American Electric Power 25 7 32 138 8 146 38 7 45 223 28%
BEC Brazos Electric Cooperative 22 6 28 9 9 6 5 11 48 6%
BTU Bryan Texas Utilities 1 1 1 1 2 3 0%
CPE Centerpoint 4 20 24 4 10 14 13 26 39 77 10%
CPS City Public Services 1 1 3 3 1 1 5 1%
Denton Denton Municipal Electric 1 1 1 0%
Garland Garland Power and Light 1 1 1 0%
GEUS Greenville 6 6 6 1%
LCRA Lower Colorado River 14 2 16 3 2 1 6 11 2 13 35 4%
PUB Brownsville Public Utilities 1 1 2 2 0%
RCEC 3 12 15 3 3 18 2%
RGEC 2 2 2 0%
STEC South Texas Electric Coop 9 9 5 5 11 11 25 3%
TEXLA Texas Louisiana 1 1 1 1 2 0%
TMPA Texas Municipal Power Auth 1 1 2 1 3 4 1%
TNMP Texas-New Mexico Power 6 6 26 2 28 10 1 11 45 6%
TXU Texas Utilities 31 53 84 52 50 102 43 58 101 287 37%
112 90 202 249 89 1 339 136 107 243 784 100%TOTAL
11 Texas Nodal
NMT – Network Operations Modeling & Telemetry - Project
• Critical Measurement Definitions– Critical Measurements
• Measurements pairs (Mw and Mvar) whose loss will result in unobservability of one or more buses are called critical measurements. SE will not be able to detect errors in critical measurements due to lack of redundancy and hence errors in critical measurements will significantly affect the SE solution and hence the security assessment.
– Unobservable Buses• Buses lacking sufficient measurements around them to make them observable
are called unobservable buses. SE runs in this area of network using distributed load schedules. So the solution around these buses (Thermal and voltage violations) is not fully reliable.
– Weakly Observable Buses• A weakly observable bus does not have any injection measurements or
measurements on connected branches. It is observable due to injections at adjacent buses. As the name implies, these buses are weakly observable.
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NMT – Network Operations Modeling & Telemetry - Project
• Summary– Major Model clean-up underway
• Target to complete by 3/31/2007
– Major Telemetry effort underway• Target to have all justifications and schedules for new implementations by
3/31/2007• Implementation schedule will be published end of 1Q2007
– ERCOT will continue to provide progress reports to TPTF, TAC, and ROS on a regular basis
13 Texas Nodal
ERCOT / TDSP Road Show
Progress Update
14 Texas Nodal
ERCOT / TDSP Road Show Update
• ERCOT started the Road show in August 2006 to work with TDSPs
to “jump start” their Nodal efforts
– TDSPs are critical for EDS 1 and EDS 2 as defined by the Nodal
Transition Plan
– TDSPs are on the critical path for Nodal to be successful
• ERCOT has met with 7 of the 18 TDSPs
– ERCOT Wholesale Client Services is attempting to schedule time
with all remaining TDSPs by 1Q2007
– All remaining have been contacted, and 4 have been scheduled for
Dec 2006 or Jan 2007.
– ERCOT presented Nodal information at LCRA “Storm Team”
meeting for many smaller TDSPs that are within LCRA jurisdiction
15 Texas Nodal
ERCOT / TDSP Road Show Details
TSP Name Road Show Status
AEP TEXAS CENTRAL COMPANY Complete
BRAZOS ELECTRIC POWER CO OP INC (TDSP) In Planning – Jan 07
BROWNSVILLE PUBLIC UTILITY BOARD (TDSP) Contacted
BRYAN TEXAS UTILITIES (TDSP) Contacted
CENTERPOINT ENERGY HOUSTON ELECTRIC LLC (TDSP) Complete
CITY OF AUSTIN DBA AUSTIN ENERGY (TDSP) Complete
CITY OF COLLEGE STATION (TDSP) Contacted
CITY OF GARLAND (TDSP) Complete
CITY OF SAN ANTONIO CITY PUBLIC SERVICE (TDSP) Complete
DENTON MUNICIPAL ELECTRIC (TDSP) Contacted
GEUS (TDSP) Contacted
LCRA TRANSMISSION SERVICES CORPORATION Complete
MAGIC VALLEY ELECTRIC CO OP INC (TDSP) Joint with STEC (Scheduled Dec 6th)
RAYBURN COUNTRY CO OP DBA RAYBURN ELECTRIC (TDSP) Contacted
SOUTH TEXAS ELECTRIC CO OP INC Scheduled Dec 6th
TEXAS MUNICIPAL POWER AGENCY Contacted
TEXAS-NEW MEXICO POWER CO (TDSP) In Planning
TXU ELECTRIC DELIVERY (TDSP) Complete