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June 12, 2012 Mc meeting. DENNIS ROBINSON Market Operations. Timeline Adjustments for the Clearing of the DAM & RAA. Moving the Day Ahead Market & Reser ve Adequacy Assessment Clearing Times. Outline – Moving DAM & RAA Timelines. Why? - Operational Reliability Concern How it Works Today - PowerPoint PPT Presentation
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JUNE 12, 2012 MC MEETING
DENNIS ROBINSONMarket Operations
Timeline Adjustments for the Clearing of the DAM & RAA
Moving the Day Ahead Market & Reserve Adequacy Assessment Clearing Times
Outline – Moving DAM & RAA Timelines
• Why? - Operational Reliability Concern
• How it Works Today
• What? – Propose Moving the DAM & RAA Clearing timelines
• Next Steps - schedule
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WHY? - Operational Reliability Concern
• Current commitment timelines do not provide timely information regarding fuel availability for gas fired generation that allows for ISO operations to commit longer lead time resources.
• Why has this become a problem?
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WHY? - Operational Reliability Concern
• Increased Reliance on Natural Gas Fired Generation:– In 1990, Gas Fired Generation accounted for approximately 5% of
energy– Currently, Gas Fired accounts for approximately 50% of energy with oil
accounting for approximately 0.5%
• Increased Dependency on Gas Fired Generation will continue in the future– Economic & Environmentally Attractive– Counterbalancing the Variable Energy Resources (i.e. Wind)
• Majority of Gas Fired Generators are not Firm Customers of the Pipelines– Pipelines becoming more strict (OFOs, shut off valves)– 1/24 hour by hour level take
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WHY? - Operational Reliability Concern
• No Longer Just a Cold Weather Concern– Interrupted Fuel Supply (Sable Island)– Hot Temperatures Coupled with Pipeline Maintenance– Pipelines Forcing Generators Offline
• Unable to accommodate when delivery is not scheduled properly• Jeopardizing pipeline reliability -Current ISO timing provides inadequate
time to properly pack and schedule pipeline
• Late Notification of Commitment– Gas fired Generation may be unable to procure fuel– Late Communication/Notification to Control Room results in being
unable to call on longer lead time oil fired generators
5
How It Works Today
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How It Works Today- Current ISO - NE Process
Daily Initial Nomination
Deadline12:30
Evening Nomination Deadline
19:00
22:00 (D-1) - 24:00 (D)Resource Adequacy AssessmentHourly SchedulingCurrent Operating Plan5-min. Dispatch
10:00 AM 10:00 AM
12:00 AM
Gas Day -1Intra-Day 1 Nomination
11:00
Gas Day -1Intra-Day 2 Nomination
18:00
Gas Day-1 Intra-Day 1 Effective
Flow18:00
Gas Day-1 Intra-Day 2
Effective Flow 22:00
16:00 DAM Clears
18:00 Reoffer Period Closes
12:00 DAM Closes
22:00 RAA Complete
12:00 AM 12:00 AM
Daily Initial & Evening Nomination Effective Flow 10:00
Gas DayIntra-Day 1 Nomination
11:00
Gas Day Intra-Day 1 Effective
Flow18:00
Gas Day vs.
Electric Day Timelines
Gas Day vs.
Electric Day Timelines
Gas Nomination Timing– NAESB Standards
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Nomination Cycle Nomination Deadline Nomination Effective Time
Timely Cycle Previous Day by 12:30 PM Next Day 10:00 AM*
Evening Cycle Previous Day by 07:00 PM Next Day 10:00 AM*
Intra-Day 1 11:00 AM 06:00 PM
Intra-Day 2 06:00 PM 10:00 PM
* Start of Gas Day / (All times are in Eastern Time (ET))
How it Works Today – NAESB Standards
9
Scenario
# of Opportunities to
Nominate Gas using Intra-Day & (Hours of Flow)
# of Opportunities to Nominate Gas using the Daily & Evening & (Hours
of Flow)
Can they fully nominate their
gas? (YES or NO)
Current DAM 3 (HE1-10,19-24) 1 (HE 11 – 24) YES
Current RAA 2 (HE 19-24) 0 NO
What? – Propose Moving the DAM & RAA Clearing timelines
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• Produce DAM & Initial RAA Results/Schedules by 11:30 AM on the Day Prior to Operating Day
• Pros– Generators would know their schedules from both the DAM & initial RAA prior
to the 12:30 EST Timely Nomination Deadline• Better utilize the gas pipeline capability• Firm –up the fuel supply for gas generators (particularly those that cycle or needed
intermittently)–ensuring reliable commitment – Allow Control Room to call on long lead time replacement generators for units
who are unable to procure fuel or commit supplemental units for reliability after knowing market response
• Cons– Clearing Occurs Further Away from Operating Day (Load Forecast, Outage
information) – More Risk– Price Certainty on Offers – Offer Window closes prior to price discovery – More
Risk
What? – Propose Moving the DAM & RAA Clearing timelines
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• Other considerations as part of this proposed modification– Alignment of Mitigation Rules (review of rules)– Information /Communication requirements
Schedule
• Markets Committee– July Summer Meeting: ISO Proposed Timeline/Discussion– August: Proposed Rule Changes– September: Vote Market Rule Changes
• Participants Committee– October: Vote Market Rule Changes
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