imbalance energy overview highlight imbalance energy
TRANSCRIPT
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Highlight Imbalance Energy charges
Introduce Imbalance Energy concepts
Imbalance Energy types:Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
Imbalance Energy Overview
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Course Agenda
Imbalance Energy OverviewPricing of Imbalance EnergyImbalance Energy types
Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
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What is Imbalance Energy?
Imbalances (deviations) between scheduled energy and meter data.
SC’s final Energy schedule is compared against the corresponding meter data to determine if the SC:
Generated or imported more energy than its scheduleGenerated or imported less energy than its scheduleConsumed or exported more energy than its scheduleConsumed or exported less energy than its schedule
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What is Imbalance Energy (IE)?
The ISO accounts for Imbalance Energy as follows:
For Generator: Imbalance Energy = Metered Energy – Scheduled Energy
For Load:Imbalance Energy = Scheduled Energy – Metered Energy
For System Resources:Imbalance Energy = Real-Time Flow – Scheduled Energy
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IE for a Generator:
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Final HA Sched
Meter Read
Settlement Interval Hourly Schedule Interval Meter Read
1 100 15.833
Imbalance Energy = Metered Energy – Scheduled Energy
Imbalance Energy Total = ( 15.833 MWh ) - ( 100 MW / 6 ) = -0.834
5 101 2
0
MW
100
Dispatch IntervalMinute
Imbalance Energy (IE) Example:
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Course Agenda
Imbalance Energy OverviewPricing of Imbalance EnergyImbalance Energy types
Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
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Imbalance Energy - Pricing
5-Minute Ex Post Price = The Market Clearing Price (MCP) based on the incremental costof the system to serve the next increment of load.
Bid Ceiling $400/MWhBid Floor $-30/MWh
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Imbalance Energy - Pricing
5-Minute Ex Post Price = The Market Clearing Price (MCP) based on the incremental costof the system to serve the next increment of load.
Bid Ceiling $400/MWhBid Floor $-30/MWh
Resource-Specific Price = 10-Minute Weighted Average Price of two 5-minute ex postprices and two 5-minute instructed energy quantities for Resource.
Energy settled at Resource Specific Price:1. Instructed Energy2. Uninstructed Energy (Tier 1)
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Imbalance Energy - Pricing
5-Minute Ex Post Price = The Market Clearing Price (MCP) based on the incremental costof the system to serve the next increment of load.
Bid Ceiling $400/MWhBid Floor $-30/MWh
Resource-Specific Price = 10-Minute Weighted Average Price of two 5-minute ex postprices and two 5-minute instructed energy quantities for Resource.
Energy settled at Resource Specific Price:1. Instructed Energy2. Uninstructed Energy (Tier 1)
Zonal Ex Post Price = 10-Minute Weighted Average Price of two 5-minute ex post pricesand two 5 minute instructed energy quantities for ISO System.
Energy settled at Zonal Ex Post Price:1. Uninstructed Energy (Tier 2)2. Regulating Energy
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Course Agenda
Imbalance Energy OverviewPricing of Imbalance EnergyImbalance Energy Types
Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
12
Course Agenda
Imbalance Energy OverviewPricing of Imbalance EnergyImbalance Energy Types
Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
13
Instructed Energy Overview:
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
Charge Type 4401 MW All dispatch instructions are deemed delivered MW
MW
MW
MW Price
Price
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Instructed Energy Overview:
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
Charge Type 4401 MW All dispatch instructions are deemed delivered MW Instructed Energy calculated based on 5-minute
dispatch interval. Settled at 10-minute Settlement Interval.
MW
MW
MW Price
Price
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Instructed Energy Overview:
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
Charge Type 4401 MW All dispatch instructions are deemed delivered MW Instructed Energy calculated based on 5-minute
dispatch interval. Settled at 10-minute Settlement Interval.
MW Can schedule transmission losses associated with Final HA Schedule
MW
MW Price
Price
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Instructed Energy Overview:
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
Charge Type 4401 MW All dispatch instructions are deemed delivered MW Instructed Energy calculated based on 5-minute
dispatch interval. Settled at 10-minute Settlement Interval.
MW Can schedule transmission losses associated with Final HA Schedule
MW Regulation energy paid as Instructed Energy (at Zonal MCP)
MW Price
Price
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Instructed Energy Overview:
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
Charge Type 4401 MW All dispatch instructions are deemed delivered MW Instructed Energy calculated based on 5-minute
dispatch interval. Settled at 10-minute Settlement Interval.
MW Can schedule transmission losses associated with Final HA Schedule
MW Regulation energy paid as Instructed Energy (at Zonal MCP)
MW Minimum Load Energy as Instructed Energy Price
Price
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Instructed Energy Overview:
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
Charge Type 4401 MW All dispatch instructions are deemed delivered MW Instructed Energy calculated based on 5-minute
dispatch interval. Settled at 10-minute Settlement Interval.
MW Can schedule transmission losses associated with Final HA Schedule
MW Regulation energy paid as Instructed Energy (at Zonal MCP)
MW Minimum Load Energy as Instructed Energy Price 10-min Resource Specific Price (except regulating
energy paid at Zonal Ex Post Price) Price
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Instructed Energy Overview:
Charge Type 4401 MW All dispatch instructions are deemed delivered MW Instructed Energy calculated based on 5-minute
dispatch interval. Settled at 10-minute Settlement Interval.
MW Can schedule transmission losses associated with Final HA Schedule
MW Regulation energy paid as Instructed Energy (at Zonal MCP)
MW Minimum Load Energy as Instructed Energy Price 10-min Resource Specific Price (except regulating
energy paid at Zonal Ex Post Price) Price Extra Marginal Energy guaranteed Bid Cost
Recovery
Definition: Energy produced or consumed as the result of responding to Dispatch Instructions.
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Course Agenda
Imbalance Energy OverviewPricing of Imbalance EnergyImbalance Energy types
Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
21
Uninstructed Imbalance Energy (UIE)
Definition: Energy produced or consumed above or below schedule without any dispatch instruction from the ISO.
Charge Type 4407 MW Uninstructed Energy calculated at the resource level MW
MW
Price
MW
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Uninstructed Imbalance Energy (UIE)
Definition: Energy produced or consumed above or below schedule without any dispatch instruction from the ISO.
Charge Type 4407 MW Uninstructed Energy calculated at the resource level MW Implementation of Uninstructed Deviation Penalty
when unit uninsructedly deviates beyond tolerance band (the greater of 3% of Pmax or 5 MW)
MW
Price
MW
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Uninstructed Imbalance Energy (UIE)
Definition: Energy produced or consumed above or below schedule without any dispatch instruction from the ISO.
Charge Type 4407 MW Uninstructed Energy calculated at the resource level MW Implementation of Uninstructed Deviation Penalty
when unit uninsructedly deviates beyond tolerance band (the greater of 3% of Pmax or 5 MW)
MW UIE is settled in two tiers: • UIE_1 = UIE attributed to non compliance
with Dispatch Instruction • UIE_2 = Any remaining UIE
Price
MW
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Uninstructed Imbalance Energy (UIE)
Definition: Energy produced or consumed above or below schedule without any dispatch instruction from the ISO.
Charge Type 4407 MW Uninstructed Energy calculated at the resource level MW Implementation of Uninstructed Deviation Penalty
when unit uninsructedly deviates beyond tolerance band (the greater of 3% of Pmax or 5 MW)
MW UIE is settled in two tiers: • UIE_1 = UIE attributed to non compliance
with Dispatch Instruction • UIE_2 = Any remaining UIE
Price • UIE_1 settled at resource specific price • UIE_2 settled at zonal ex post price
MW
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Uninstructed Imbalance Energy (UIE)
Definition: Energy produced or consumed above or below schedule without any dispatch instruction from the ISO.
Charge Type 4407 MW Uninstructed Energy calculated at the resource level MW Implementation of Uninstructed Deviation Penalty
when unit uninsructedly deviates beyond tolerance band (the greater of 3% of Pmax or 5 MW)
MW UIE is settled in two tiers: • UIE_1 = UIE attributed to non compliance
with Dispatch Instruction • UIE_2 = Any remaining UIE
Price • UIE_1 settled at resource specific price • UIE_2 settled at zonal ex post price
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Course Agenda
Imbalance Energy OverviewPricing of Imbalance EnergyImbalance Energy types
Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
27
Transmission Loss Obligation
Definition: Line loss that occurs when electricity is transmitted over power line. Each resource has a transmission Loss Obligation.
Charge Type 4450 MW Transmission loss obligation settled
explicitly through CT 4450 MW
Price
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Transmission Loss Obligation
Definition: Line loss that occurs when electricity is transmitted over power line. Each resource has a transmission Loss Obligation.
Charge Type 4450 MW Transmission loss obligation settled
explicitly through CT 4450 MW Resource/Intertie can opt to self schedule
Transmission Loss obligation associated with Final HA schedule
Price
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Transmission Loss Obligation
Definition: Line loss that occurs when electricity is transmitted over power line. Each resource has a transmission Loss Obligation.
Charge Type 4450 MW Transmission loss obligation settled
explicitly through CT 4450 MW Resource/Intertie can opt to self schedule
Transmission Loss obligation associated with Final HA schedule
Price Settled at Resource-Specific price or Average Ex Post Price.
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Continuing ConceptsImbalance Energy (IE) CalculationFor Generator: Imbalance Energy = Metered Energy – Scheduled
EnergyFor Load: Imbalance Energy = Scheduled Energy – Metered EnergyFor System Resources: Imbalance Energy = Real-Time Flow – Scheduled
Energy
Imbalance Energy Charge Types Instructed Imbalance Energy - CT 4401Uninstructed Imbalance Energy - CT 4407Transmission Loss Obligation – CT 4450
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Imbalance Energy Overview Wrap Up:
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Any Questions?