NV Energy
Energy Imbalance Market (EIM)
Presentation to ISAS
April 22, 2015
EIM Footprint
• Existing Market in
CAISO
• PacifiCorp joined in
Fall 2014
• NV Energy to join in
Fall 2015
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Energy Imbalance Market Update
• November 2013: Announced plan to join CAISO
EIM
• August 2014: Received PUCN Approval
• Amendment to Transmission Tariff to participate
in EIM
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August 2014 – January 2015: Stakeholder workshops and tariff comments
February 2015: Finalize tariff revisions and FERC pre-filing meetings
March 2015: File tariff revisions with the FERC
July – September: Stakeholder Training
Biweekly meetings with PUCN and BCP staff through implementation
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Energy Imbalance Market Update Con’t.
• Technical Milestones
– September 2014 - February 2015: Model NV Energy system into the CAISO
system model, designate “Participating Resources”, and develop
applications and test plans
– April - June 2015: Testing, early connectivity, and early market simulation
– June – July 2015: Training Sessions – if you or your colleagues wish to
receive email notices, please send contact information to:
• NVE-EIM-Stakeholder@nvenergy.com
– September 2015: Parallel non-binding operation
– OCTOBER 2015: MARKET OPERATION GO-LIVE
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EIM Advantages
• Increased Reliability – more tools and modeling to
provide operational awareness across a larger (EIM)
footprint increasing reliability
• Improved Renewable Integration – Helps integrate
renewable resources by capturing the benefits of
longitudinal / geographic diversity.
• Cost Savings – Energy Imbalances served from a
much larger pool of least cost resources. Redispatched every five minutes.
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Variable Generation
penetration in the West
• VERs are a growing portion of generation portfolios
• Increasing due to:
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State renewable requirements
No fuel costs
Environmental impacts
Publicly accepted
System/load geography
• Rooftop solar
• Tax credits
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Variable Generation
Integration Solar/Wind
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Terminology
• Market Operator
• Scheduling Coordinator
– Operates the market model,
produces dispatches
• EIM Entity
– Interfaces with Market
Operator (EESC and PRSC)
• Data
– BAA that allows EIM to operate in
their footprint
• Participating Resource
– Generator that bids energy into
the market
• Non-Participating Resources
– Resources within the BA not
submitting bids
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Schedules and forecasts
System model
Outages
Dispatch instructions
RTM: Real-Time Market
RTD: Real-Time Dispatch
RTUC (RTPD): Real-Time PreDispatch
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EIM Process Overview
Economic Bids
Generation Forecast
Interchange Forecast
Load Forecast
Outages
EIM
15-Minute
Market
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EIM Process Overview
EIM
15-Minute
Market
Awarded
15-Minute
Schedule
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EIM Process Overview
Economic Bids
Updates to
Generation Forecast
Interchange Forecast
Load Forecast
Outages
EIM
5-Minute
Market
State Estimator
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Operational Overview
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Expansion of CAISO’s current 5 minute market
Security Constrained Economic Dispatch (SCED)
Congestion management
Network model visibility and increased outage
accuracy in CAISO as well as NV Energy systems
• Increased modeling and outage details for modeling
purposes lead to increased situational awareness
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Base Schedule data flow
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Responsibilities: Other Load Serving
Entities (LSEs) – Non-NV Energy
• Forecast / Resources
• Base Schedules
Note that currently all participating resources are NV Energy units –
additional participating units are welcome. If interested please email
NVE-EIM-Stakeholder@nvenergy.com for more information.
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Base Schedule Background
What
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A forward energy schedule
Includes hourly forecasts of load, generation schedules, and Inter-tie schedules
Why
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It communicates the hourly planned operation for participating resources, nonparticipating resources, imports, exports, and load
Represents a financially binding starting point in the real-time market
When
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Day-ahead is prior to 10:00 am ppt the day before the operating hour
Real-time - 75 minutes prior to the start of the operating hour
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Base Schedules
• Entity must come to the market balanced
• Base Schedule (G + I = L) (feasibility check)
– Forecast of Generation
– Forecast of Interchange
– Forecast of Load
• Submitted by all customers to EIM Entity
• Data aggregated and validated by NV Energy
• Entity (NV Energy) retains all BAA responsibilities
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Base Schedule Details
• An EIM base schedule is a forward looking
energy schedule. It includes hourly forecasts of
load, hourly generation schedules, and hourly
inter-tie schedules
• Base schedules are used to balance load and
generation in our Balancing Authority (BA)
• Base Schedules are also used as a baseline for
settlements
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Base Schedule Details, Con’t.
• Day Ahead Market opens 7 days before the
Operating Day
• Day Ahead Market closes at 10:00 pm ppt before the
Operating Day, and used as baseline for real-time
market
• Base schedules must be submitted for both
Participating and non-participating resources
• Can be modified by 75 minutes before the operating
hour. EIM entity then has 2 opportunities for
adjustment.
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Base Schedules, Load and Bid Range
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Redispatch
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Timeline leading up to Operating Hour
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Security Events and Outages
• Currently made public on OASIS
• Under EIM, outage forms will be completed in NV
Energy’s outage management system in real-time
• Outages will be posted on OASIS and communicated
to CAISO within 30 minutes
• Outages will be reflected in market results for
congestion, EIM dispatches, and settlements
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Settlements Overview
• Three settlement processes with the EIM
1) CAISO to EIM Participating Resource/Participating Intertie
Settlement
2) CAISO to EIM Entity (BA) Settlement which includes all load
and nonparticipating resources and interties
3) BA settling with all entities within their region
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Settlements & Invoicing Timeline
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CAISO
Daily
Settlement
Statement
T+3B
Recalculation
Recalculation
Settlement
Settlement
Statement
Statement
T+12B –
T+12B
Recalculation
Recalculation
Settlement
Settlement
Statement
Statement
T+55B
T+55B
Every
Wednesday
Trading days
Monday - Sunday
plus recalcs
Invoices EESC
Payment advices
to PR
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NV Energy – EIM Entity Scheduling Coordinator
Invoice
Transmission
Customers
OATT Section 7.1 amended to enable
billing more frequently than once per
month
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Dispute Timeline
Statement Publication
Settlement Dispute
Deadline
Settlement Dispute
Data
T+12B
T+26B
All but ESQMD
T+55B
T+77B
All
T+9M (T+194B)
T+10M (T+216B)
Incremental Changes
Only
Note that Section 7.1 of OATT provides for the flexibility to expedite billing of EIM
settlements to better match CAISO’s dispute resolution timeline.
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Questions
For notification of EIM related postings on OASIS, please email your contact
information to NVE-EIM-Stakeholder@nvenergy.com
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