1. CUG Meeting June 3 – 5 Salt Lake City, UT
Jay Loock SR Compliance Auditor Operations & Planning Audit Approach MOD-026 & MOD-027
CUG Meeting June 3 – 5 Salt Lake City, UT

2. Agenda Brief history of MOD Standards
Applicability to registered functions
Timelines
Audit approach for each requirement

3. FERC did what? On March 20, 2014, FERC approved:
MOD (MOD and MOD merge) effective date – July 1, 2016
MOD (New) effective date - July 1, 2014
MOD (New) effective date - July 1, 2014
PRC (New) effective date - July 1, 2016
PRC (New) effective date - July 1, 2016

4. What else did FERC do? Also on May 1, 2014 FERC approved:
MOD-032-1(New) - Effective date - July 1, 2015
MOD-033-1(New) - Effective date - July 1, 2017
MOD and MOD-12-0 (retired)

5. MOD-026 and MOD-027
These standards are applicable to Transmission Planners (TP) and Generator Owners (GO).

6. What about those MODs?
MOD-026 requires generator owners to verify that dynamic models of excitation controls are accurate and up-to-date;
MOD-027 places the same requirements on dynamic models of governors and turbine controls.

7. MOD-026 R1 (TP)
R1 is intended to ensure that the TP provides information to the GO(s) necessary to ensure that they provide a useable model in an acceptable format (from an approved model list). This ensures that GOs can comply with Requirement R2.

8. MOD-026 R1 - Audit approach
Within 90 days of a request from the GO the TP shall:
Provide a approved model list.
Provide data (model) being used historically for the GO.

9. MOD-026 R2 (GO)
The purpose of R2 is to verify that the generator excitation control system or plant volt/var control function model and the model parameters used in dynamic simulations performed by the TP accurately represents the generator excitation control system or plant volt/var control function behavior when assessing BES reliability.

10. Not auditable until July 1, 2018 July 1, 2018 - 30% July 1, 2020 - 50%
MOD-026 R2 - Audit approach
Not auditable until July 1, 2018
July 1, %
July 1, %
July 1, %

11. MOD-026 R2 MVA Requirement
Individual generating unit greater than 75 MVA (gross nameplate rating).
Individual generating plant consisting of multiple generating units that are directly connected at a common BES bus with total generation greater than 75 MVA (gross aggregate nameplate rating).

12. MOD-026 R2 MVA Requirment or….
A technically justified unit that meets NERC registry criteria but is not otherwise included in the above applicability and is requested by the Transmission Planner.

13. MOD-026 R3 (GO)
R3 provides response requirements for a GO when it receives certain requests from the TP. This communication ensures that GOs have an obligation to respond in a timely fashion when there are demonstrated problems with a model that was provided by the GO.

14. MOD-026 R3 - Audit approach GO response to TP in 90 days when:
Model is unusable
Model has technical concerns
Model response concerns
R3 details what should be in the GO response

15. MOD-026 R4 (GO)
R4 ensures that when a GO makes a change to an applicable unit that would affect the model provided in accordance with Requirement R2, the GO then has an obligation to determine whether there is an impact on the model and to provide the TP with revised model data or plans to perform model verification.

16. MOD-026 R4 - Audit approach Were changes made to the units?
Were models updated?
Were timelines met?

17. MOD-026 R5 (GO) Footnote 2
R5 ensures that there is a process for TP to request a model review for technically justified units not specified in the standard applicability section but that meet or exceed the Registry Criteria unit MVA thresholds.

18. MOD-026 R5 - Audit approach
Did GO provide a written response to the TP within 90 days?
Do the details of the response address the requirement?

19. MOD-026 R6 (TP)
R6 requires the TP to inform the GO within 90 calendar days whether a model is useable or not. The response from the TP verifies that the TP has sufficient information and ensures that the verification process is complete.

20. MOD-026 R6 - Audit approach
TP communicated to the GO(s) that the model is or is not useable.
TP shall provide a technical description why the model is not usable.

21. MOD Purpose
Its purpose is to verify that the turbine/governor and load control or active power/frequency control model and the model parameters, used in dynamic simulations that assess bulk electric system reliability, accurately represent generator unit real power response to system frequency variations.

22. MOD-027 R1 (TP)
R1 is intended to ensure that the TP provides information to the GO(s) necessary to ensure that they provide a useable model in an acceptable format (from an approved model list). This ensures that GOs can comply with Requirement R2.

23. MOD-027 R1 - Audit approach
Within 90 days of a request from the GO the TP shall:
Provide a approved model list.
Provide data (model) being used historically for the GO.

24. MOD-027 R2 (GO)
R2 requires GOs to provide TP with a verified turbine/governor and load control or active power/frequency control model for each applicable unit, including documentation and data in accordance with the periodicity specified in Attachment 1.

25. Not auditable until July 1, 2018 July 1, 2018 - 30% July 1, 2020 - 50%
MOD-027 R2 - Audit approach
Not auditable until July 1, 2018
July 1, %
July 1, %
July 1, %

26. MOD-027 R3 (GO)
R3 provides response requirements for a GO when it receives certain requests from the TP. This communication ensures that GOs have an obligation to respond in a timely fashion when there are demonstrated problems with a model that was provided by the GO.

27. MOD-027 R3 - Audit approach GO response to TP in 90 days when:
Model is unusable
Model has technical concerns
Model response concerns
R3 details what should be in the GO response

28. MOD-027 R4 (GO)
R4 ensures that when a GO makes a change to an applicable unit that would affect the model provided in accordance with Requirement R2, the GO then has an obligation to determine whether there is an impact on the model and to provide the TP with revised model data or plans to perform model verification.

29. MOD-027 R4 - Audit approach Were changes made to the units?
Were models updated?
Were timelines met?

30. MOD-027 R5 (TP)
R5 requires the TP to inform the GO within 90 calendar days whether a model is useable or not. The response from the TP verifies that the TP has sufficient information and ensures that the verification process is complete.

31. MOD-027 R5 - Audit approach
TP communicated to the GO(s) that the model is or is not useable.
TP shall provide a technical description why the model is not usable.

32. WECC Generator Testing Program
Satisfies these two standards
WECC Certification is the gold standard.

33. Questions?
Jay Loock