oasis insights & observations transmission customer forum september 21-22, 2006 jim viikinsalo...
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OASIS Insights & ObservationsOASIS Insights & Observations
Transmission Customer ForumTransmission Customer Forum
September 21-22, 2006
Jim Viikinsalo
September 21-22, 2006
Jim Viikinsalo
Outline• Historical Background• OASIS Data Posting Requirements• Transmission Service Overview• Short-Term Request Processing• Tips of the Trade (Helpful Query Methods)
Evolution of OASIS• Open Access Same-time Information System• FERC Order 889 (April 1996)
– Transmission Providers post transmission data to OASIS Web sites– Standards and Communications Protocol (“S&CP”)
• Standard data exchange formats required by the FERC• Customers/vendors can access data and display in their own desired format
• Basic core data set is unchanged, but functionality has increased throughout the years– From “horseless carriage” to a vehicle with A/C and automatic
transmission
OASIS Data Posting Requirements• ATC/TTC values on each posted path:
– at least 13 months of Monthly service– at least 30 days of Daily service– at least 168 hours of Hourly service
• 82 different paths posted on the Southern Company OASIS
• Result – tons of data, only pounds useful (desired)(most inquiries seeking only a very small and specific subset of the data)
Daily Study Process - Summary• Near-term studies update Daily and Hourly TTC postings
– System conditions for a given day are not known 30 days in advance, so Monthly TTC value used initially
– 2-Day Study: Forecast developed based upon real-time conditions. Daily/Hourly TTCs updated and posted to OASIS.
– Next-Day Study: Daily and Hourly TTCs updated and posted again with more recent system conditions.
– ATC updated continuously every time a customer:• Confirms transmission service• Redirects transmission service• Schedules partial transmission service
• Result – “pounds” of useful information– Daily and Hourly TTCs/ATCs based on real-time conditions– Postings for Days 3-30 based on estimated system conditions as projected in
monthly studies
Other Information Posted on OASIS• Schedules• Interruptions and Curtailments• Planned Transmission Outage Schedule• Significant Transmission Outages• Tariff and Rate Summaries• System Impact Studies and Facilities Studies• Interconnection Requests and Information• See the “General Information” page for more details
Transmission Service Overview• Southern Companies Open Access Transmission Tariff
(OATT) developed from pro-forma tariff of Order 888• Transmission capacity to deliver energy from a Point of
Receipt (POR) to a Point of Delivery (POD)• Different types and priorities of service exist
– Network Integration service (Firm, Secondary)– Point-to-Point service (Firm, Non-firm, Secondary)
Service PrioritiesN
ER
C
Cu
rtai
lmen
t P
rio
rity
Type of Service
Pos
ting
Req
uire
men
t
Ear
liest
req
uest
ca
n be
mad
e
Late
st r
eque
st
can
be m
ade
Cus
tom
er m
ust
conf
irm w
ithin
Res
erva
tio
n
Pri
ori
ty
Con
ditio
nal
requ
ests
bec
ome
firm
(ca
nnot
be
pre-
empt
ed)
Res
ella
ble/
R
eass
igna
ble
Sch
edul
e D
eadl
ine
LTF7 Yearly/Firm/Network n/a n/a 15 d 1 n/a No 10a db7 Yearly/Firm/Point-to-Point n/a n/a 60 d 15 d 1 n/a Yes 10a db
7 Yearly/Firm/Recallable n/a n/a 60 d 15 d 1 n/a Yes 10a db7 Monthly/Firm/Network n/a 13m 2 n/a No 10a db7 Weekly/Firm/Network n/a 13w 3 n/a No 10a db7 Daily/Firm/Network n/a 30d 4 n/a No 10a db
STF
7 Monthly/Firm/Point-to-Point 13m 13m 4 d 5 1 m Yes 10a db
7 Weekly/Firm/Point-to-Point 13w 13w 48 h 6 1 w Yes 10a db
7 Daily/Firm/Point-to-Point 30 d 30 d noon db 24 h 7 1 d Yes 10a dbNon-firm
6 Daily/Secondary/Network n/a 30 d 2p db 8 n/a No 2p db6 Hourly/Secondary/Network n/a 168h 20 m 9 n/a No 2p db5 Monthly/Non-Firm/Point-to-Point 13m 60 d 24 h 10 n/a 2p db
4 Weekly/Non-Firm/Point-to-Point 13w 14 d 24 h 11 n/a 2p db
3 Daily/Non-Firm/Point-to-Point 30d 2 d 2p db 2 h 12 n/a 2p db
2 Hourly/Non-Firm/Point-to-Point 168h Noon db 20 m 30 m 13 n/a 2p db1 Hourly/Secondary/Point-to-Point 168h 14 n/a 2p db
Maintaining Reliability• Interruption – A pre-emption of lower priority service when
ATC is needed to grant requests for higher-priority service– Usually implemented in advance of a schedule start– Example: Hourly non-firm request bumps Hourly redirect request
• Curtailment – A reduction in schedules for reliability to relieve a transmission constraint– Usually happens after a schedule begins– All firm curtailed pro-rata– Non-firm curtailed by economics (value of service) and Last in First
Out (LIFO)
Daily Request Processing• 0600-0700 Central M-F: Begin answering next-day requests• Tips
– Daily requests can be queued several days ahead of time• Avoid queue flooding and displacements
– Query TTC in System Data to view the time of last update– Make note of Section 13.2 in the OATT (conditional acceptance)
• Redirect activity makes ATC more volatile– Initial request may be refused, but a subsequent redirect may allow a
similar request to be accepted (non-discriminatory for both responses)– Capacity made available as a result of redirects is offered on a first-
come, first served basis
Request Volume
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
2003 2004 2005 2006 (YTD)
Total Requests
Confirmed
Many requests are
approved, but not
confirmed by customers
Service Availability – 2006 YTD• Firm service
– 3 planned outages required reductions of the SOCO-FL interface
– 1 unplanned outage required curtailments during an off-peak period on the DUK-SOCO interface
• Non-firm service– 11 reliability events required curtailment of non-firm service
• No TLRs initiated by SOCO Reliability Coordinator
There’s Gold In Them Thar Hills!• OASIS contains a great deal of data in standard format
– SOCO OASIS provides access via Web browser• View service offerings, requests, outages, and more• Audit Templates available for specific queries of the database
– Standard FERC format also allows users to access data directly• Using custom or third-party tools, users can display information in the manner
most valuable to their own operations• S&CP allows for customized presentations
of information from the OASIS sites of multiple providers
– Users usually discover that the data theywant is on OASIS today
Query the database using Audit Templates• Use audit queries to view changes in offerings and
reservations• Follow the “Audit Templates” link from the Customer
Menu page– requires only elementary knowledge of S&CP– Service Offerings audit trail – via transofferingaudit– Reservation Status audit trail – via transstatusaudit
• Follow “System Data” link to see TTC/ATC timestamps
Data, such as ATC, changes very
frequently when customer activity is
high
Audit Query - Example Input• follow link to Audit Templates
from Menu page• input is case-sensitive• can query by different sets of
input parameters (Path, Seller, POR,POD, etc.)
• date format is yyyymmddhhmmssTZ
Audit Query – Example Output
• Results are sorted from latest to earliest updates• ATC can vary significantly as reservations are confirmed,
redirects away are granted, and schedules are approved• Results can be viewed inside Web browser (html) or
downloaded as a CSV text file (data)
• Other possibilities– request submittal
and response– redirect / resale
management– post analysis
• Vendor solutions– exist today
Build Your Own User Interface
Demonstration
