1. NV Energy Energy Imbalance Market (EIM) Presentation to ISAS
April 22, 2015
Left picture Cresent Dunes Solar – 110 MW owned by Solar Reserve. Concentrated solar power with thermal energy storage (molten salt) located near Tonopah
Center picture – LV strip – Bellagio
Right picture – on line

2. EIM Footprint Existing Market in CAISO PacifiCorp joined in Fall 2014
NV Energy to join in Fall 2015

3. 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
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

4. Energy Imbalance Market Update Con’t.
Technical Milestones
September 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 notices, please send contact information to:
September 2015: Parallel non-binding operation
OCTOBER 2015: MARKET OPERATION GO-LIVE

5. 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. Re- dispatched every five minutes.

6. Variable Generation penetration in the West
VERs are a growing portion of generation portfolios
Increasing due to:
State renewable requirements
No fuel costs
Environmental impacts
Publicly accepted
System/load geography
Rooftop solar
Tax credits

7. Variable Generation Integration Solar/Wind

8. Terminology Market Operator EIM Entity Participating Resource
Operates the market model, produces dispatches
EIM Entity
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
Scheduling Coordinator
Interfaces with Market Operator (EESC and PRSC)
Data
Schedules and forecasts
System model
Outages
Dispatch instructions
RTM: Real-Time Market
RTD: Real-Time Dispatch
RTUC (RTPD): Real-Time Pre-Dispatch

9. EIM Process Overview EIM 15-Minute Market Economic Bids
Generation Forecast
Interchange Forecast
Load Forecast
Outages
Economic Bids

10. EIM Process Overview
EIM
15-Minute
Market
Awarded
Schedule

11. EIM Process Overview EIM 5-Minute Market Economic Bids Updates to
Generation Forecast
Interchange Forecast
Load Forecast
Outages
Economic Bids
State Estimator

12. Operational Overview 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

13. Base Schedule data flow

14. 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 for more information.

15. Base Schedule Background
What
A forward energy schedule
Includes hourly forecasts of load, generation schedules, and Inter-tie schedules
Why
It communicates the hourly planned operation for participating resources, non-participating resources, imports, exports, and load
Represents a financially binding starting point in the real-time market
When
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

16. 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

17. 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

18. 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.

19. Base Schedules, Load and Bid Range

20. Redispatch

21. Timeline leading up to Operating Hour

22. 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

23. Settlements Overview Three settlement processes with the EIM
CAISO to EIM Participating Resource/Participating Intertie Settlement
CAISO to EIM Entity (BA) Settlement which includes all load and nonparticipating resources and interties
BA settling with all entities within their region

24. Settlements & Invoicing Timeline
CAISO
NV Energy – EIM Entity Scheduling Coordinator
Daily Settlement Statement T+3B
Recalculation Settlement Statement T+12B
Recalculation Settlement Statement T+55B
Recalculation Settlement Statement – T+12B
Recalculation Settlement Statement T+55B
Invoices EESC
Payment advices to PR
Trading days Monday - Sunday
plus recalcs
Every Wednesday
Invoice Transmission Customers
OATT Section 7.1 amended to enable billing more frequently than once per month

26. Dispute Timeline Statement Publication Settlement Dispute Deadline
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.

27. Questions
For notification of EIM related postings on OASIS, please your contact information to