1. Brett Wangen Director of Engineering, Peak Reliability
ECC Update
3/22/2017
WECC MIC/OC Joint Meeting
Brett Wangen Director of Engineering, Peak Reliability

2. Current ECC Project Status
Real-time situational awareness phase is available for Peak, TOP and BA operators
Lessons learned to be addressed in future releases
Improve data organization, clear solutions (not just information) for operators
Auto define elements based on real-time assessments
Benefit of RT situational awareness – provide method for monitoring unique outage constraints, identifying/validating operating plans.

3. Qualified Path Management Progress
ECC supporting Unscheduled Flow Mitigation Plan functionality for Qualified Paths
ECC accuracy benefits over webSAS
Zonal
Source to Sink
Colors represent the “zones”

4. webSAS/ECC Parallel Operations
March 1 – June 1
Peak working with BAs to implement detailed mapping between scheduling and operations worlds
webSAS users getting access to the ECC
~90% of BAs have access to ECC
Peak producing comparison reports for review and discussion (ECC vs. webSAS)
Transition plan includes review/acceptance of parallel ops results by UFAS.

5. Initial Findings of Parallel Operations
Tag Name
TDF(%) ECC
PACE_TAG1_NEVP
10.4
WACM_TAG2_PNM
14.3
PACE_TAG3_LDWP
10.6
WACM_TAG4_WALC
11.5
WACM_TAG5_PSCO
44.7
WACM_TAG6_PSCO
WACM_TAG7_PSCO
WACM_TAG8_WALC
WACM_TAG9_SRP 12
Source to Sink TDFs from ECC
ECC/webSAS Differences
Source and sink zones same in webSAS (0%) 13
Exempt from curtailment due to crossing phase shifter 18
Source and sink BAs same in ECC (0%) 46
Scheduled MW is 0 21
Zones in webSAS show less than 10% TDF 56
DC Line Mapping Mismatch between ECC and webSAS
Total tags in the report
182
Summary of differences found between webSAS and ECC curtailments

6. Next Steps – Future Hour
Initial use case
Qualified Paths – what is going to happen next hour?
Objective – reduce need for step 3 & 4 actions by having awareness of next hour flows
Functionality not limited to Qualified Paths
Today, Qualified Path Operators can’t accurately predict if next hour needs relief provided
Future hour functionality in the ECC will use real-time snapshots and apply load forecast, scheduled outages, and generator output

7. = Calculating Value ECCRT + ECCQP + ECCFH – TOP-007-WECC-1
There is a clear cost (reliability and dollars) to adjusting phase shifters and making curtailments based on Qualified Path SOLs
Transition to the ECC paradigm will reduce those costs because of
Real-time data and assessments driving actions
No proxy Path SOLs
ECC accuracy and capabilities
ECCRT + ECCQP + ECCFH – TOP-007-WECC-1 =
INCREASED RELIABILITY AND EFFICIENCY

8. An Ongoing Paradigm Change
“A” is the current state
“B” is move of webSAS to ECC
“C” implements ECC future hour
“D” defines the expanded use of ECC
State A
TOP-007-WECC-1
webSAS
State B
No TOP-007-WECC-1
ECC supporting QPs/WIUFMP
State D
No TOP-007-WECC-1
ECC supporting QPs/WIUFMP
Future Hour Info
ECC expanded use beyond QPs
State C
No TOP-007-WECC-1
ECC supporting QPs/WIUFMP
Future Hour Info
Acknowledge that class 1 and 2 have concerns over policy

9. TOT 3 Example Based on Nov 2016
Path 36 – TOT 3
Seven lines at 345, 230, and 115kV
Thermally limited
Limit dynamic based on local generation levels and DC flow and direction
Limiting contingencies dependent on generation and DC; generally loss of line or generation results in facility rating exceedances
November 2016, TOT 3 WIUFMP actions triggered
20 hours of Step 3 phase shifter operations
14 hours of Step 4 curtailments involving Path 36
Represents both reliability risk and decrease in efficiency

10. Applying Path 36, November 2016 to Paradigm Change
State D
No TOP-007-WECC-1
ECC supporting QPs/WIUFMP
Future Hour Info
ECC expanded use beyond QPs
State C
No TOP-007-WECC-1
ECC supporting QPs/WIUFMP
Future Hour Info
State B
No TOP-007-WECC-1
ECC supporting QPs/WIUFMP
State A
TOP-007-WECC-1
webSAS
Reliability benefit
low
low/medium
medium
high
Efficiency benefit
Step 3
COPS hours
20 hours
~8 hours
N/A
Step 4 Curtailments
14 hours
~6 hours
Target Date
Current
June 1, 2017
Q4 2017/
Q1 2018
Q4 2018
State C based on 60% number we have been discussing

11. ECC Task Force
Enable the development of ECC by providing technical, regulatory and policy related input to Peak
Upcoming meetings
April 3 and 4, CAISO
May 4 (webinar)
June 13 and 14, Portland (tentative)